From 6dbed53191c741e0139bfca622b7fec1e1c506ac Mon Sep 17 00:00:00 2001 From: Florian Rupprecht <33600480+nx10@users.noreply.github.com> Date: Sun, 21 Jan 2024 16:18:08 -0500 Subject: [PATCH] Remove Boost & Update Dependencies (#146) * Remove Boost; Update dependencies * Minor cleanups --- DESCRIPTION | 2 +- client/package-lock.json | 6069 ++-------- client/package.json | 30 +- inst/www/bundle.js | 2 +- src/Makevars.in | 2 +- src/Makevars.ucrt | 1 - src/Makevars.win | 1 - src/httpgd.cpp | 1 - src/httpgd_rng.cpp | 26 +- src/httpgd_version.h | 3 - src/httpgd_webserver.cpp | 32 +- src/httpgd_webserver.h | 1 + src/lib/compat/optional.hpp | 1066 ++ src/lib/crow.h | 12661 +-------------------- src/lib/crow/TinySHA1.hpp | 196 + src/lib/crow/app.h | 601 + src/lib/crow/ci_map.h | 41 + src/lib/crow/common.h | 356 + src/lib/crow/compression.h | 99 + src/lib/crow/http_connection.h | 619 + src/lib/crow/http_parser_merged.h | 2008 ++++ src/lib/crow/http_request.h | 93 + src/lib/crow/http_response.h | 325 + src/lib/crow/http_server.h | 285 + src/lib/crow/json.h | 2003 ++++ src/lib/crow/logging.h | 165 + src/lib/crow/middleware.h | 331 + src/lib/crow/middleware_context.h | 60 + src/lib/crow/middlewares/cookie_parser.h | 307 + src/lib/crow/middlewares/cors.h | 200 + src/lib/crow/middlewares/session.h | 604 + src/lib/crow/middlewares/utf-8.h | 25 + src/lib/crow/mime_types.h | 118 + src/lib/crow/multipart.h | 273 + src/lib/crow/mustache.h | 721 ++ src/lib/crow/parser.h | 200 + src/lib/crow/query_string.h | 489 + src/lib/crow/returnable.h | 19 + src/lib/crow/routing.h | 1776 +++ src/lib/crow/settings.h | 67 + src/lib/crow/socket_adaptors.h | 171 + src/lib/crow/task_timer.h | 137 + src/lib/crow/utility.h | 901 ++ src/lib/crow/version.h | 6 + src/lib/crow/websocket.h | 744 ++ src/optional_lex.h | 210 +- 46 files changed, 16392 insertions(+), 17655 deletions(-) create mode 100644 src/lib/compat/optional.hpp create mode 100644 src/lib/crow/TinySHA1.hpp create mode 100644 src/lib/crow/app.h create mode 100644 src/lib/crow/ci_map.h create mode 100644 src/lib/crow/common.h create mode 100644 src/lib/crow/compression.h create mode 100644 src/lib/crow/http_connection.h create mode 100644 src/lib/crow/http_parser_merged.h create mode 100644 src/lib/crow/http_request.h create mode 100644 src/lib/crow/http_response.h create mode 100644 src/lib/crow/http_server.h create mode 100644 src/lib/crow/json.h create mode 100644 src/lib/crow/logging.h create mode 100644 src/lib/crow/middleware.h create mode 100644 src/lib/crow/middleware_context.h create mode 100644 src/lib/crow/middlewares/cookie_parser.h create mode 100644 src/lib/crow/middlewares/cors.h create mode 100644 src/lib/crow/middlewares/session.h create mode 100644 src/lib/crow/middlewares/utf-8.h create mode 100644 src/lib/crow/mime_types.h create mode 100644 src/lib/crow/multipart.h create mode 100644 src/lib/crow/mustache.h create mode 100644 src/lib/crow/parser.h create mode 100644 src/lib/crow/query_string.h create mode 100644 src/lib/crow/returnable.h create mode 100644 src/lib/crow/routing.h create mode 100644 src/lib/crow/settings.h create mode 100644 src/lib/crow/socket_adaptors.h create mode 100644 src/lib/crow/task_timer.h create mode 100644 src/lib/crow/utility.h create mode 100644 src/lib/crow/version.h create mode 100644 src/lib/crow/websocket.h diff --git a/DESCRIPTION b/DESCRIPTION index 41ceaeb..da081f2 100644 --- a/DESCRIPTION +++ b/DESCRIPTION @@ -21,7 +21,7 @@ Imports: unigd LinkingTo: cpp11 (>= 0.2.4), - BH (>= 1.75.0), + AsioHeaders (>= 1.22.1), unigd Suggests: testthat, diff --git a/client/package-lock.json b/client/package-lock.json index 0ab9529..aebb7da 100644 --- a/client/package-lock.json +++ b/client/package-lock.json @@ -1,7 +1,7 @@ { "name": "httpgd-client", "version": "1.0.0", - "lockfileVersion": 2, + "lockfileVersion": 3, "requires": true, "packages": { "": { @@ -12,24 +12,33 @@ "httpgd": "^0.1.7" }, "devDependencies": { - "@typescript-eslint/eslint-plugin": "^5.1.0", - 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a/src/httpgd_rng.cpp b/src/httpgd_rng.cpp index 3737d3f..085f5d3 100644 --- a/src/httpgd_rng.cpp +++ b/src/httpgd_rng.cpp @@ -1,9 +1,6 @@ #include "httpgd_rng.h" -#include -#include -#include #include #include @@ -13,8 +10,27 @@ namespace rng { std::string uuid() { - boost::uuids::random_generator uuid_gen; - return boost::uuids::to_string(uuid_gen()); + const int uuidLength = 36; // Including hyphens + std::string uuid; + uuid.reserve(uuidLength); + + std::random_device rd; + std::mt19937 gen(rd()); + std::uniform_int_distribution<> dis(0, 15); + + auto randomByte = [&]() { + const char hexChars[] = "0123456789abcdef"; + return hexChars[dis(gen)]; + }; + + for (int i = 0; i < 32; ++i) { + if (i == 8 || i == 12 || i == 16 || i == 20) { + uuid += '-'; + } + uuid += randomByte(); + } + + return uuid; } std::string token(int length) diff --git a/src/httpgd_version.h b/src/httpgd_version.h index cbb9a81..0e53bf6 100644 --- a/src/httpgd_version.h +++ b/src/httpgd_version.h @@ -1,6 +1,3 @@ #ifndef HTTPGD_VERSION #define HTTPGD_VERSION "2.0.0" - -#include -#define HTTPGD_VERSION_BOOST BOOST_LIB_VERSION #endif diff --git a/src/httpgd_webserver.cpp b/src/httpgd_webserver.cpp index 0233555..ed5a204 100644 --- a/src/httpgd_webserver.cpp +++ b/src/httpgd_webserver.cpp @@ -4,6 +4,7 @@ #define CROW_MAIN #include #include +#include #include @@ -18,12 +19,12 @@ namespace { const char *HTTPGD_CLIENT_INFO = "httpgd " HTTPGD_VERSION; -inline boost::optional read_txt(const std::string &filepath) +inline std::experimental::optional read_txt(const std::string &filepath) { std::ifstream t(filepath); if (t.fail()) { - return boost::none; + return std::experimental::nullopt; } std::stringstream buffer; buffer << t.rdbuf(); @@ -54,13 +55,13 @@ struct plot_return : public crow::returnable const unigd_render_access m_render; }; -inline boost::optional req_find_id(unigd_api_v1 *api, +inline std::experimental::optional req_find_id(unigd_api_v1 *api, UNIGD_HANDLE ugd_handle, const crow::request &req) { if (!api) { - return boost::none; + return std::experimental::nullopt; } const auto p_id = param_to(req.url_params.get("id")); if (p_id) @@ -70,10 +71,10 @@ inline boost::optional req_find_id(unigd_api_v1 *api, const auto p_index = param_to(req.url_params.get("index")); if (!p_index) { - return boost::none; + return std::experimental::nullopt; } - boost::optional re = boost::none; + std::experimental::optional re = std::experimental::nullopt; unigd_find_results qr; const auto handle = api->device_plots_find(ugd_handle, *p_index, 1, &qr); if (qr.size > 0) @@ -144,7 +145,7 @@ void WebServer::TokenGuard::before_handle(crow::request &req, crow::response &re { return; } - boost::optional user_token = boost::none; + std::experimental::optional user_token = std::experimental::nullopt; const auto f_header_token = req.headers.find("X-HTTPGD-TOKEN"); if (f_header_token != req.headers.end()) { @@ -155,7 +156,7 @@ void WebServer::TokenGuard::before_handle(crow::request &req, crow::response &re user_token = param_to(req.url_params.get("token")); } - if (!user_token || (user_token.get() != m_token)) + if (!user_token || (user_token.value() != m_token)) { res.code = crow::UNAUTHORIZED; res.end(); @@ -290,7 +291,7 @@ void WebServer::run() UNIGD_FIND_HANDLE find_handle; unigd_find_results qr; find_handle = m_api->device_plots_find( - m_ugd_handle, p_index.get_value_or(0), p_limit.get_value_or(0), &qr); + m_ugd_handle, p_index.value_or(0), p_limit.value_or(0), &qr); std::vector plot_list; plot_list.reserve(qr.size); @@ -317,19 +318,19 @@ void WebServer::run() double width, height, zoom; if (p_width && p_height) { - zoom = param_to(req.url_params.get("zoom")).get_value_or(1); + zoom = param_to(req.url_params.get("zoom")).value_or(1); width = (*p_width) / zoom; height = (*p_height) / zoom; } else { zoom = 1; - width = p_width.get_value_or(-1); - height = p_height.get_value_or(-1); + width = p_width.value_or(-1); + height = p_height.value_or(-1); } - const auto p_id = req_find_id(m_api, m_ugd_handle, req).get_value_or(-1); + const auto p_id = req_find_id(m_api, m_ugd_handle, req).value_or(-1); const auto p_renderer = - param_to(req.url_params.get("renderer")).get_value_or("svg"); + param_to(req.url_params.get("renderer")).value_or("svg"); const auto p_download = param_to(req.url_params.get("download")); if (m_api) @@ -413,8 +414,7 @@ void WebServer::run() return crow::response(crow::status::NOT_FOUND); }); - CROW_ROUTE(m_app, "/") - .websocket() + CROW_WEBSOCKET_ROUTE(m_app, "/") .onopen( [&](crow::websocket::connection &conn) { diff --git a/src/httpgd_webserver.h b/src/httpgd_webserver.h index ecf46c3..6e52c35 100644 --- a/src/httpgd_webserver.h +++ b/src/httpgd_webserver.h @@ -2,6 +2,7 @@ #define __UNIGD_HTTPGD_WEBSERVER_H__ #include +#include #include #include diff --git a/src/lib/compat/optional.hpp b/src/lib/compat/optional.hpp new file mode 100644 index 0000000..d01b089 --- /dev/null +++ b/src/lib/compat/optional.hpp @@ -0,0 +1,1066 @@ +// Copyright (C) 2011 - 2012 Andrzej Krzemienski. +// +// Use, modification, and distribution is subject to the Boost Software +// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) +// +// The idea and interface is based on Boost.Optional library +// authored by Fernando Luis Cacciola Carballal + +# ifndef ___OPTIONAL_HPP___ +# define ___OPTIONAL_HPP___ + +# include +# include +# include +# include +# include +# include +# include + +# define TR2_OPTIONAL_REQUIRES(...) typename enable_if<__VA_ARGS__::value, bool>::type = false + +# if defined __GNUC__ // NOTE: GNUC is also defined for Clang +# if (__GNUC__ == 4) && (__GNUC_MINOR__ >= 8) +# define TR2_OPTIONAL_GCC_4_8_AND_HIGHER___ +# elif (__GNUC__ > 4) +# define TR2_OPTIONAL_GCC_4_8_AND_HIGHER___ +# endif + +# if (__GNUC__ == 4) && (__GNUC_MINOR__ >= 7) +# define TR2_OPTIONAL_GCC_4_7_AND_HIGHER___ +# elif (__GNUC__ > 4) +# define TR2_OPTIONAL_GCC_4_7_AND_HIGHER___ +# endif + +# if (__GNUC__ == 4) && (__GNUC_MINOR__ == 8) && (__GNUC_PATCHLEVEL__ >= 1) +# define TR2_OPTIONAL_GCC_4_8_1_AND_HIGHER___ +# elif (__GNUC__ == 4) && (__GNUC_MINOR__ >= 9) +# define TR2_OPTIONAL_GCC_4_8_1_AND_HIGHER___ +# elif (__GNUC__ > 4) +# define TR2_OPTIONAL_GCC_4_8_1_AND_HIGHER___ +# endif +# endif + +# if defined __clang_major__ +# if (__clang_major__ == 3 && __clang_minor__ >= 5) +# define TR2_OPTIONAL_CLANG_3_5_AND_HIGHTER_ +# elif (__clang_major__ > 3) +# define TR2_OPTIONAL_CLANG_3_5_AND_HIGHTER_ +# endif +# if defined TR2_OPTIONAL_CLANG_3_5_AND_HIGHTER_ +# define TR2_OPTIONAL_CLANG_3_4_2_AND_HIGHER_ +# elif (__clang_major__ == 3 && __clang_minor__ == 4 && __clang_patchlevel__ >= 2) +# define TR2_OPTIONAL_CLANG_3_4_2_AND_HIGHER_ +# endif +# endif + +# if defined _MSC_VER +# if (_MSC_VER >= 1900) +# define TR2_OPTIONAL_MSVC_2015_AND_HIGHER___ +# endif +# endif + +# if defined __clang__ +# if (__clang_major__ > 2) || (__clang_major__ == 2) && (__clang_minor__ >= 9) +# define OPTIONAL_HAS_THIS_RVALUE_REFS 1 +# else +# define OPTIONAL_HAS_THIS_RVALUE_REFS 0 +# endif +# elif defined TR2_OPTIONAL_GCC_4_8_1_AND_HIGHER___ +# define OPTIONAL_HAS_THIS_RVALUE_REFS 1 +# elif defined TR2_OPTIONAL_MSVC_2015_AND_HIGHER___ +# define OPTIONAL_HAS_THIS_RVALUE_REFS 1 +# else +# define OPTIONAL_HAS_THIS_RVALUE_REFS 0 +# endif + + +# if defined TR2_OPTIONAL_GCC_4_8_1_AND_HIGHER___ +# define OPTIONAL_HAS_CONSTEXPR_INIT_LIST 1 +# define OPTIONAL_CONSTEXPR_INIT_LIST constexpr +# else +# define OPTIONAL_HAS_CONSTEXPR_INIT_LIST 0 +# define OPTIONAL_CONSTEXPR_INIT_LIST +# endif + +# if defined TR2_OPTIONAL_CLANG_3_5_AND_HIGHTER_ && (defined __cplusplus) && (__cplusplus != 201103L) +# define OPTIONAL_HAS_MOVE_ACCESSORS 1 +# else +# define OPTIONAL_HAS_MOVE_ACCESSORS 0 +# endif + +// In C++11 constexpr implies const, so we need to make non-const members also non-constexpr +# if (defined __cplusplus) && (__cplusplus == 201103L) +# define OPTIONAL_MUTABLE_CONSTEXPR +# else +# define OPTIONAL_MUTABLE_CONSTEXPR constexpr +# endif + +namespace std{ + +namespace experimental{ + +// BEGIN workaround for missing is_trivially_destructible +# if defined TR2_OPTIONAL_GCC_4_8_AND_HIGHER___ + // leave it: it is already there +# elif defined TR2_OPTIONAL_CLANG_3_4_2_AND_HIGHER_ + // leave it: it is already there +# elif defined TR2_OPTIONAL_MSVC_2015_AND_HIGHER___ + // leave it: it is already there +# elif defined TR2_OPTIONAL_DISABLE_EMULATION_OF_TYPE_TRAITS + // leave it: the user doesn't want it +# else + template + using is_trivially_destructible = std::has_trivial_destructor; +# endif +// END workaround for missing is_trivially_destructible + +# if (defined TR2_OPTIONAL_GCC_4_7_AND_HIGHER___) + // leave it; our metafunctions are already defined. +# elif defined TR2_OPTIONAL_CLANG_3_4_2_AND_HIGHER_ + // leave it; our metafunctions are already defined. +# elif defined TR2_OPTIONAL_MSVC_2015_AND_HIGHER___ + // leave it: it is already there +# elif defined TR2_OPTIONAL_DISABLE_EMULATION_OF_TYPE_TRAITS + // leave it: the user doesn't want it +# else + + +// workaround for missing traits in GCC and CLANG +template +struct is_nothrow_move_constructible +{ + constexpr static bool value = std::is_nothrow_constructible::value; +}; + + +template +struct is_assignable +{ + template + constexpr static bool has_assign(...) { return false; } + + template () = std::declval(), true)) > + // the comma operator is necessary for the cases where operator= returns void + constexpr static bool has_assign(bool) { return true; } + + constexpr static bool value = has_assign(true); +}; + + +template +struct is_nothrow_move_assignable +{ + template + struct has_nothrow_move_assign { + constexpr static bool value = false; + }; + + template + struct has_nothrow_move_assign { + constexpr static bool value = noexcept( std::declval() = std::declval() ); + }; + + constexpr static bool value = has_nothrow_move_assign::value>::value; +}; +// end workaround + + +# endif + + + +// 20.5.4, optional for object types +template class optional; + +// 20.5.5, optional for lvalue reference types +template class optional; + + +// workaround: std utility functions aren't constexpr yet +template inline constexpr T&& constexpr_forward(typename std::remove_reference::type& t) noexcept +{ + return static_cast(t); +} + +template inline constexpr T&& constexpr_forward(typename std::remove_reference::type&& t) noexcept +{ + static_assert(!std::is_lvalue_reference::value, "!!"); + return static_cast(t); +} + +template inline constexpr typename std::remove_reference::type&& constexpr_move(T&& t) noexcept +{ + return static_cast::type&&>(t); +} + + +#if defined NDEBUG +# define TR2_OPTIONAL_ASSERTED_EXPRESSION(CHECK, EXPR) (EXPR) +#else +# define TR2_OPTIONAL_ASSERTED_EXPRESSION(CHECK, EXPR) ((CHECK) ? (EXPR) : ([]{assert(!#CHECK);}(), (EXPR))) +#endif + + +namespace detail_ +{ + +// static_addressof: a constexpr version of addressof +template +struct has_overloaded_addressof +{ + template + constexpr static bool has_overload(...) { return false; } + + template ().operator&()) > + constexpr static bool has_overload(bool) { return true; } + + constexpr static bool value = has_overload(true); +}; + +template )> +constexpr T* static_addressof(T& ref) +{ + return &ref; +} + +template )> +T* static_addressof(T& ref) +{ + return std::addressof(ref); +} + + +// the call to convert(b) has return type A and converts b to type A iff b decltype(b) is implicitly convertible to A +template +constexpr U convert(U v) { return v; } + + +namespace swap_ns +{ + using std::swap; + + template + void adl_swap(T& t, T& u) noexcept(noexcept(swap(t, u))) + { + swap(t, u); + } + +} // namespace swap_ns + +} // namespace detail + + +constexpr struct trivial_init_t{} trivial_init{}; + + +// 20.5.6, In-place construction +constexpr struct in_place_t{} in_place{}; + + +// 20.5.7, Disengaged state indicator +struct nullopt_t +{ + struct init{}; + constexpr explicit nullopt_t(init){} +}; +constexpr nullopt_t nullopt{nullopt_t::init()}; + + +// 20.5.8, class bad_optional_access +class bad_optional_access : public logic_error { +public: + explicit bad_optional_access(const string& what_arg) : logic_error{what_arg} {} + explicit bad_optional_access(const char* what_arg) : logic_error{what_arg} {} +}; + + +template +union storage_t +{ + unsigned char dummy_; + T value_; + + constexpr storage_t( trivial_init_t ) noexcept : dummy_() {}; + + template + constexpr storage_t( Args&&... args ) : value_(constexpr_forward(args)...) {} + + ~storage_t(){} +}; + + +template +union constexpr_storage_t +{ + unsigned char dummy_; + T value_; + + constexpr constexpr_storage_t( trivial_init_t ) noexcept : dummy_() {}; + + template + constexpr constexpr_storage_t( Args&&... args ) : value_(constexpr_forward(args)...) {} + + ~constexpr_storage_t() = default; +}; + + +template +struct optional_base +{ + bool init_; + storage_t storage_; + + constexpr optional_base() noexcept : init_(false), storage_(trivial_init) {}; + + explicit constexpr optional_base(const T& v) : init_(true), storage_(v) {} + + explicit constexpr optional_base(T&& v) : init_(true), storage_(constexpr_move(v)) {} + + template explicit optional_base(in_place_t, Args&&... args) + : init_(true), storage_(constexpr_forward(args)...) {} + + template >)> + explicit optional_base(in_place_t, std::initializer_list il, Args&&... args) + : init_(true), storage_(il, std::forward(args)...) {} + + ~optional_base() { if (init_) storage_.value_.T::~T(); } +}; + + +template +struct constexpr_optional_base +{ + bool init_; + constexpr_storage_t storage_; + + constexpr constexpr_optional_base() noexcept : init_(false), storage_(trivial_init) {}; + + explicit constexpr constexpr_optional_base(const T& v) : init_(true), storage_(v) {} + + explicit constexpr constexpr_optional_base(T&& v) : init_(true), storage_(constexpr_move(v)) {} + + template explicit constexpr constexpr_optional_base(in_place_t, Args&&... args) + : init_(true), storage_(constexpr_forward(args)...) {} + + template >)> + OPTIONAL_CONSTEXPR_INIT_LIST explicit constexpr_optional_base(in_place_t, std::initializer_list il, Args&&... args) + : init_(true), storage_(il, std::forward(args)...) {} + + ~constexpr_optional_base() = default; +}; + +template +using OptionalBase = typename std::conditional< + is_trivially_destructible::value, // if possible + constexpr_optional_base::type>, // use base with trivial destructor + optional_base::type> +>::type; + + + +template +class optional : private OptionalBase +{ + static_assert( !std::is_same::type, nullopt_t>::value, "bad T" ); + static_assert( !std::is_same::type, in_place_t>::value, "bad T" ); + + + constexpr bool initialized() const noexcept { return OptionalBase::init_; } + typename std::remove_const::type* dataptr() { return std::addressof(OptionalBase::storage_.value_); } + constexpr const T* dataptr() const { return detail_::static_addressof(OptionalBase::storage_.value_); } + +# if OPTIONAL_HAS_THIS_RVALUE_REFS == 1 + constexpr const T& contained_val() const& { return OptionalBase::storage_.value_; } +# if OPTIONAL_HAS_MOVE_ACCESSORS == 1 + OPTIONAL_MUTABLE_CONSTEXPR T&& contained_val() && { return std::move(OptionalBase::storage_.value_); } + OPTIONAL_MUTABLE_CONSTEXPR T& contained_val() & { return OptionalBase::storage_.value_; } +# else + T& contained_val() & { return OptionalBase::storage_.value_; } + T&& contained_val() && { return std::move(OptionalBase::storage_.value_); } +# endif +# else + constexpr const T& contained_val() const { return OptionalBase::storage_.value_; } + T& contained_val() { return OptionalBase::storage_.value_; } +# endif + + void clear() noexcept { + if (initialized()) dataptr()->T::~T(); + OptionalBase::init_ = false; + } + + template + void initialize(Args&&... args) noexcept(noexcept(T(std::forward(args)...))) + { + assert(!OptionalBase::init_); + ::new (static_cast(dataptr())) T(std::forward(args)...); + OptionalBase::init_ = true; + } + + template + void initialize(std::initializer_list il, Args&&... args) noexcept(noexcept(T(il, std::forward(args)...))) + { + assert(!OptionalBase::init_); + ::new (static_cast(dataptr())) T(il, std::forward(args)...); + OptionalBase::init_ = true; + } + +public: + typedef T value_type; + + // 20.5.5.1, constructors + constexpr optional() noexcept : OptionalBase() {}; + constexpr optional(nullopt_t) noexcept : OptionalBase() {}; + + optional(const optional& rhs) + : OptionalBase() + { + if (rhs.initialized()) { + ::new (static_cast(dataptr())) T(*rhs); + OptionalBase::init_ = true; + } + } + + optional(optional&& rhs) noexcept(is_nothrow_move_constructible::value) + : OptionalBase() + { + if (rhs.initialized()) { + ::new (static_cast(dataptr())) T(std::move(*rhs)); + OptionalBase::init_ = true; + } + } + + constexpr optional(const T& v) : OptionalBase(v) {} + + constexpr optional(T&& v) : OptionalBase(constexpr_move(v)) {} + + template + explicit constexpr optional(in_place_t, Args&&... args) + : OptionalBase(in_place_t{}, constexpr_forward(args)...) {} + + template >)> + OPTIONAL_CONSTEXPR_INIT_LIST explicit optional(in_place_t, std::initializer_list il, Args&&... args) + : OptionalBase(in_place_t{}, il, constexpr_forward(args)...) {} + + // 20.5.4.2, Destructor + ~optional() = default; + + // 20.5.4.3, assignment + optional& operator=(nullopt_t) noexcept + { + clear(); + return *this; + } + + optional& operator=(const optional& rhs) + { + if (initialized() == true && rhs.initialized() == false) clear(); + else if (initialized() == false && rhs.initialized() == true) initialize(*rhs); + else if (initialized() == true && rhs.initialized() == true) contained_val() = *rhs; + return *this; + } + + optional& operator=(optional&& rhs) + noexcept(is_nothrow_move_assignable::value && is_nothrow_move_constructible::value) + { + if (initialized() == true && rhs.initialized() == false) clear(); + else if (initialized() == false && rhs.initialized() == true) initialize(std::move(*rhs)); + else if (initialized() == true && rhs.initialized() == true) contained_val() = std::move(*rhs); + return *this; + } + + template + auto operator=(U&& v) + -> typename enable_if + < + is_same::type, T>::value, + optional& + >::type + { + if (initialized()) { contained_val() = std::forward(v); } + else { initialize(std::forward(v)); } + return *this; + } + + + template + void emplace(Args&&... args) + { + clear(); + initialize(std::forward(args)...); + } + + template + void emplace(initializer_list il, Args&&... args) + { + clear(); + initialize(il, std::forward(args)...); + } + + // 20.5.4.4, Swap + void swap(optional& rhs) noexcept(is_nothrow_move_constructible::value + && noexcept(detail_::swap_ns::adl_swap(declval(), declval()))) + { + if (initialized() == true && rhs.initialized() == false) { rhs.initialize(std::move(**this)); clear(); } + else if (initialized() == false && rhs.initialized() == true) { initialize(std::move(*rhs)); rhs.clear(); } + else if (initialized() == true && rhs.initialized() == true) { using std::swap; swap(**this, *rhs); } + } + + // 20.5.4.5, Observers + + explicit constexpr operator bool() const noexcept { return initialized(); } + constexpr bool has_value() const noexcept { return initialized(); } + + constexpr T const* operator ->() const { + return TR2_OPTIONAL_ASSERTED_EXPRESSION(initialized(), dataptr()); + } + +# if OPTIONAL_HAS_MOVE_ACCESSORS == 1 + + OPTIONAL_MUTABLE_CONSTEXPR T* operator ->() { + assert (initialized()); + return dataptr(); + } + + constexpr T const& operator *() const& { + return TR2_OPTIONAL_ASSERTED_EXPRESSION(initialized(), contained_val()); + } + + OPTIONAL_MUTABLE_CONSTEXPR T& operator *() & { + assert (initialized()); + return contained_val(); + } + + OPTIONAL_MUTABLE_CONSTEXPR T&& operator *() && { + assert (initialized()); + return constexpr_move(contained_val()); + } + + constexpr T const& value() const& { + return initialized() ? contained_val() : (throw bad_optional_access("bad optional access"), contained_val()); + } + + OPTIONAL_MUTABLE_CONSTEXPR T& value() & { + return initialized() ? contained_val() : (throw bad_optional_access("bad optional access"), contained_val()); + } + + OPTIONAL_MUTABLE_CONSTEXPR T&& value() && { + if (!initialized()) throw bad_optional_access("bad optional access"); + return std::move(contained_val()); + } + +# else + + T* operator ->() { + assert (initialized()); + return dataptr(); + } + + constexpr T const& operator *() const { + return TR2_OPTIONAL_ASSERTED_EXPRESSION(initialized(), contained_val()); + } + + T& operator *() { + assert (initialized()); + return contained_val(); + } + + constexpr T const& value() const { + return initialized() ? contained_val() : (throw bad_optional_access("bad optional access"), contained_val()); + } + + T& value() { + return initialized() ? contained_val() : (throw bad_optional_access("bad optional access"), contained_val()); + } + +# endif + +# if OPTIONAL_HAS_THIS_RVALUE_REFS == 1 + + template + constexpr T value_or(V&& v) const& + { + return *this ? **this : detail_::convert(constexpr_forward(v)); + } + +# if OPTIONAL_HAS_MOVE_ACCESSORS == 1 + + template + OPTIONAL_MUTABLE_CONSTEXPR T value_or(V&& v) && + { + return *this ? constexpr_move(const_cast&>(*this).contained_val()) : detail_::convert(constexpr_forward(v)); + } + +# else + + template + T value_or(V&& v) && + { + return *this ? constexpr_move(const_cast&>(*this).contained_val()) : detail_::convert(constexpr_forward(v)); + } + +# endif + +# else + + template + constexpr T value_or(V&& v) const + { + return *this ? **this : detail_::convert(constexpr_forward(v)); + } + +# endif + + // 20.6.3.6, modifiers + void reset() noexcept { clear(); } +}; + + +template +class optional +{ + static_assert( !std::is_same::value, "bad T" ); + static_assert( !std::is_same::value, "bad T" ); + T* ref; + +public: + + // 20.5.5.1, construction/destruction + constexpr optional() noexcept : ref(nullptr) {} + + constexpr optional(nullopt_t) noexcept : ref(nullptr) {} + + constexpr optional(T& v) noexcept : ref(detail_::static_addressof(v)) {} + + optional(T&&) = delete; + + constexpr optional(const optional& rhs) noexcept : ref(rhs.ref) {} + + explicit constexpr optional(in_place_t, T& v) noexcept : ref(detail_::static_addressof(v)) {} + + explicit optional(in_place_t, T&&) = delete; + + ~optional() = default; + + // 20.5.5.2, mutation + optional& operator=(nullopt_t) noexcept { + ref = nullptr; + return *this; + } + + // optional& operator=(const optional& rhs) noexcept { + // ref = rhs.ref; + // return *this; + // } + + // optional& operator=(optional&& rhs) noexcept { + // ref = rhs.ref; + // return *this; + // } + + template + auto operator=(U&& rhs) noexcept + -> typename enable_if + < + is_same::type, optional>::value, + optional& + >::type + { + ref = rhs.ref; + return *this; + } + + template + auto operator=(U&& rhs) noexcept + -> typename enable_if + < + !is_same::type, optional>::value, + optional& + >::type + = delete; + + void emplace(T& v) noexcept { + ref = detail_::static_addressof(v); + } + + void emplace(T&&) = delete; + + + void swap(optional& rhs) noexcept + { + std::swap(ref, rhs.ref); + } + + // 20.5.5.3, observers + constexpr T* operator->() const { + return TR2_OPTIONAL_ASSERTED_EXPRESSION(ref, ref); + } + + constexpr T& operator*() const { + return TR2_OPTIONAL_ASSERTED_EXPRESSION(ref, *ref); + } + + constexpr T& value() const { + return ref ? *ref : (throw bad_optional_access("bad optional access"), *ref); + } + + explicit constexpr operator bool() const noexcept { + return ref != nullptr; + } + + constexpr bool has_value() const noexcept { + return ref != nullptr; + } + + template + constexpr typename decay::type value_or(V&& v) const + { + return *this ? **this : detail_::convert::type>(constexpr_forward(v)); + } + + // x.x.x.x, modifiers + void reset() noexcept { ref = nullptr; } +}; + + +template +class optional +{ + static_assert( sizeof(T) == 0, "optional rvalue references disallowed" ); +}; + + +// 20.5.8, Relational operators +template constexpr bool operator==(const optional& x, const optional& y) +{ + return bool(x) != bool(y) ? false : bool(x) == false ? true : *x == *y; +} + +template constexpr bool operator!=(const optional& x, const optional& y) +{ + return !(x == y); +} + +template constexpr bool operator<(const optional& x, const optional& y) +{ + return (!y) ? false : (!x) ? true : *x < *y; +} + +template constexpr bool operator>(const optional& x, const optional& y) +{ + return (y < x); +} + +template constexpr bool operator<=(const optional& x, const optional& y) +{ + return !(y < x); +} + +template constexpr bool operator>=(const optional& x, const optional& y) +{ + return !(x < y); +} + + +// 20.5.9, Comparison with nullopt +template constexpr bool operator==(const optional& x, nullopt_t) noexcept +{ + return (!x); +} + +template constexpr bool operator==(nullopt_t, const optional& x) noexcept +{ + return (!x); +} + +template constexpr bool operator!=(const optional& x, nullopt_t) noexcept +{ + return bool(x); +} + +template constexpr bool operator!=(nullopt_t, const optional& x) noexcept +{ + return bool(x); +} + +template constexpr bool operator<(const optional&, nullopt_t) noexcept +{ + return false; +} + +template constexpr bool operator<(nullopt_t, const optional& x) noexcept +{ + return bool(x); +} + +template constexpr bool operator<=(const optional& x, nullopt_t) noexcept +{ + return (!x); +} + +template constexpr bool operator<=(nullopt_t, const optional&) noexcept +{ + return true; +} + +template constexpr bool operator>(const optional& x, nullopt_t) noexcept +{ + return bool(x); +} + +template constexpr bool operator>(nullopt_t, const optional&) noexcept +{ + return false; +} + +template constexpr bool operator>=(const optional&, nullopt_t) noexcept +{ + return true; +} + +template constexpr bool operator>=(nullopt_t, const optional& x) noexcept +{ + return (!x); +} + + + +// 20.5.10, Comparison with T +template constexpr bool operator==(const optional& x, const T& v) +{ + return bool(x) ? *x == v : false; +} + +template constexpr bool operator==(const T& v, const optional& x) +{ + return bool(x) ? v == *x : false; +} + +template constexpr bool operator!=(const optional& x, const T& v) +{ + return bool(x) ? *x != v : true; +} + +template constexpr bool operator!=(const T& v, const optional& x) +{ + return bool(x) ? v != *x : true; +} + +template constexpr bool operator<(const optional& x, const T& v) +{ + return bool(x) ? *x < v : true; +} + +template constexpr bool operator>(const T& v, const optional& x) +{ + return bool(x) ? v > *x : true; +} + +template constexpr bool operator>(const optional& x, const T& v) +{ + return bool(x) ? *x > v : false; +} + +template constexpr bool operator<(const T& v, const optional& x) +{ + return bool(x) ? v < *x : false; +} + +template constexpr bool operator>=(const optional& x, const T& v) +{ + return bool(x) ? *x >= v : false; +} + +template constexpr bool operator<=(const T& v, const optional& x) +{ + return bool(x) ? v <= *x : false; +} + +template constexpr bool operator<=(const optional& x, const T& v) +{ + return bool(x) ? *x <= v : true; +} + +template constexpr bool operator>=(const T& v, const optional& x) +{ + return bool(x) ? v >= *x : true; +} + + +// Comparison of optional with T +template constexpr bool operator==(const optional& x, const T& v) +{ + return bool(x) ? *x == v : false; +} + +template constexpr bool operator==(const T& v, const optional& x) +{ + return bool(x) ? v == *x : false; +} + +template constexpr bool operator!=(const optional& x, const T& v) +{ + return bool(x) ? *x != v : true; +} + +template constexpr bool operator!=(const T& v, const optional& x) +{ + return bool(x) ? v != *x : true; +} + +template constexpr bool operator<(const optional& x, const T& v) +{ + return bool(x) ? *x < v : true; +} + +template constexpr bool operator>(const T& v, const optional& x) +{ + return bool(x) ? v > *x : true; +} + +template constexpr bool operator>(const optional& x, const T& v) +{ + return bool(x) ? *x > v : false; +} + +template constexpr bool operator<(const T& v, const optional& x) +{ + return bool(x) ? v < *x : false; +} + +template constexpr bool operator>=(const optional& x, const T& v) +{ + return bool(x) ? *x >= v : false; +} + +template constexpr bool operator<=(const T& v, const optional& x) +{ + return bool(x) ? v <= *x : false; +} + +template constexpr bool operator<=(const optional& x, const T& v) +{ + return bool(x) ? *x <= v : true; +} + +template constexpr bool operator>=(const T& v, const optional& x) +{ + return bool(x) ? v >= *x : true; +} + +// Comparison of optional with T +template constexpr bool operator==(const optional& x, const T& v) +{ + return bool(x) ? *x == v : false; +} + +template constexpr bool operator==(const T& v, const optional& x) +{ + return bool(x) ? v == *x : false; +} + +template constexpr bool operator!=(const optional& x, const T& v) +{ + return bool(x) ? *x != v : true; +} + +template constexpr bool operator!=(const T& v, const optional& x) +{ + return bool(x) ? v != *x : true; +} + +template constexpr bool operator<(const optional& x, const T& v) +{ + return bool(x) ? *x < v : true; +} + +template constexpr bool operator>(const T& v, const optional& x) +{ + return bool(x) ? v > *x : true; +} + +template constexpr bool operator>(const optional& x, const T& v) +{ + return bool(x) ? *x > v : false; +} + +template constexpr bool operator<(const T& v, const optional& x) +{ + return bool(x) ? v < *x : false; +} + +template constexpr bool operator>=(const optional& x, const T& v) +{ + return bool(x) ? *x >= v : false; +} + +template constexpr bool operator<=(const T& v, const optional& x) +{ + return bool(x) ? v <= *x : false; +} + +template constexpr bool operator<=(const optional& x, const T& v) +{ + return bool(x) ? *x <= v : true; +} + +template constexpr bool operator>=(const T& v, const optional& x) +{ + return bool(x) ? v >= *x : true; +} + + +// 20.5.12, Specialized algorithms +template +void swap(optional& x, optional& y) noexcept(noexcept(x.swap(y))) +{ + x.swap(y); +} + + +template +constexpr optional::type> make_optional(T&& v) +{ + return optional::type>(constexpr_forward(v)); +} + +template +constexpr optional make_optional(reference_wrapper v) +{ + return optional(v.get()); +} + + +} // namespace experimental +} // namespace std + +namespace std +{ + template + struct hash> + { + typedef typename hash::result_type result_type; + typedef std::experimental::optional argument_type; + + constexpr result_type operator()(argument_type const& arg) const { + return arg ? std::hash{}(*arg) : result_type{}; + } + }; + + template + struct hash> + { + typedef typename hash::result_type result_type; + typedef std::experimental::optional argument_type; + + constexpr result_type operator()(argument_type const& arg) const { + return arg ? std::hash{}(*arg) : result_type{}; + } + }; +} + +# undef TR2_OPTIONAL_REQUIRES +# undef TR2_OPTIONAL_ASSERTED_EXPRESSION + +# endif //___OPTIONAL_HPP___ diff --git a/src/lib/crow.h b/src/lib/crow.h index a54ae47..25c136a 100644 --- a/src/lib/crow.h +++ b/src/lib/crow.h @@ -1,12638 +1,25 @@ -/*BSD 3-Clause License - -Copyright (c) 2014-2017, ipkn - 2020-2022, CrowCpp -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are met: - -* Redistributions of source code must retain the above copyright notice, this - list of conditions and the following disclaimer. - -* Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation - and/or other materials provided with the distribution. - -* Neither the name of the author nor the names of its - contributors may be used to endorse or promote products derived from - this software without specific prior written permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE -DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE -FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR -SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, -OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -The Crow logo and other graphic material (excluding third party logos) used are under exclusive Copyright (c) 2021-2022, Farook Al-Sammarraie (The-EDev), All rights reserved. -*/ #pragma once -// settings for crow -// TODO(ipkn) replace with runtime config. libucl? - -/* #ifdef - enables debug mode */ -//#define CROW_ENABLE_DEBUG - -/* #ifdef - enables logging */ -#define CROW_ENABLE_LOGGING - -/* #ifdef - enables ssl */ -//#define CROW_ENABLE_SSL - -/* #ifdef - enforces section 5.2 and 6.1 of RFC6455 (only accepting masked messages from clients) */ -//#define CROW_ENFORCE_WS_SPEC - -/* #define - specifies log level */ -/* - Debug = 0 - Info = 1 - Warning = 2 - Error = 3 - Critical = 4 - - default to INFO -*/ -#ifndef CROW_LOG_LEVEL -#define CROW_LOG_LEVEL 1 -#endif - -#ifndef CROW_STATIC_DIRECTORY -#define CROW_STATIC_DIRECTORY "static/" -#endif -#ifndef CROW_STATIC_ENDPOINT -#define CROW_STATIC_ENDPOINT "/static/" -#endif - -// compiler flags -#if defined(_MSVC_LANG) && _MSVC_LANG >= 201402L -#define CROW_CAN_USE_CPP14 -#endif -#if __cplusplus >= 201402L -#define CROW_CAN_USE_CPP14 -#endif - -#if defined(_MSVC_LANG) && _MSVC_LANG >= 201703L -#define CROW_CAN_USE_CPP17 -#endif -#if __cplusplus >= 201703L -#define CROW_CAN_USE_CPP17 -#endif - -#if defined(_MSC_VER) -#if _MSC_VER < 1900 -#define CROW_MSVC_WORKAROUND -#define constexpr const -#define noexcept throw() -#endif -#endif - -#if defined(__GNUC__) && __GNUC__ == 8 && __GNUC_MINOR__ < 4 -#if __cplusplus > 201103L -#define CROW_GCC83_WORKAROUND -#else -#error "GCC 8.1 - 8.3 has a bug that prevents Crow from compiling with C++11. Please update GCC to > 8.3 or use C++ > 11." -#endif -#endif - - - -// This file is generated from nginx/conf/mime.types using nginx_mime2cpp.py on 2021-12-03. -#include -#include - -namespace crow -{ - const std::unordered_map mime_types{ - {"shtml", "text/html"}, - {"htm", "text/html"}, - {"html", "text/html"}, - {"css", "text/css"}, - {"xml", "text/xml"}, - {"gif", "image/gif"}, - {"jpg", "image/jpeg"}, - {"jpeg", "image/jpeg"}, - {"js", "application/javascript"}, - {"atom", "application/atom+xml"}, - {"rss", "application/rss+xml"}, - {"mml", "text/mathml"}, - {"txt", "text/plain"}, - {"jad", "text/vnd.sun.j2me.app-descriptor"}, - {"wml", "text/vnd.wap.wml"}, - {"htc", "text/x-component"}, - {"avif", "image/avif"}, - {"png", "image/png"}, - {"svgz", "image/svg+xml"}, - {"svg", "image/svg+xml"}, - {"tiff", "image/tiff"}, - {"tif", "image/tiff"}, - {"wbmp", "image/vnd.wap.wbmp"}, - {"webp", "image/webp"}, - {"ico", "image/x-icon"}, - {"jng", "image/x-jng"}, - {"bmp", "image/x-ms-bmp"}, - {"woff", "font/woff"}, - {"woff2", "font/woff2"}, - {"ear", "application/java-archive"}, - {"war", "application/java-archive"}, - {"jar", "application/java-archive"}, - {"json", "application/json"}, - {"hqx", "application/mac-binhex40"}, - {"doc", "application/msword"}, - {"pdf", "application/pdf"}, - {"ai", "application/postscript"}, - {"eps", "application/postscript"}, - {"ps", "application/postscript"}, - {"rtf", "application/rtf"}, - {"m3u8", "application/vnd.apple.mpegurl"}, - {"kml", "application/vnd.google-earth.kml+xml"}, - {"kmz", "application/vnd.google-earth.kmz"}, - {"xls", "application/vnd.ms-excel"}, - {"eot", "application/vnd.ms-fontobject"}, - {"ppt", "application/vnd.ms-powerpoint"}, - {"odg", "application/vnd.oasis.opendocument.graphics"}, - {"odp", "application/vnd.oasis.opendocument.presentation"}, - {"ods", "application/vnd.oasis.opendocument.spreadsheet"}, - {"odt", "application/vnd.oasis.opendocument.text"}, - {"pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation"}, - {"xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"}, - {"docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"}, - {"wmlc", "application/vnd.wap.wmlc"}, - {"wasm", "application/wasm"}, - {"7z", "application/x-7z-compressed"}, - {"cco", "application/x-cocoa"}, - {"jardiff", "application/x-java-archive-diff"}, - {"jnlp", "application/x-java-jnlp-file"}, - {"run", "application/x-makeself"}, - {"pm", "application/x-perl"}, - {"pl", "application/x-perl"}, - {"pdb", "application/x-pilot"}, - {"prc", "application/x-pilot"}, - {"rar", "application/x-rar-compressed"}, - {"rpm", "application/x-redhat-package-manager"}, - {"sea", "application/x-sea"}, - {"swf", "application/x-shockwave-flash"}, - {"sit", "application/x-stuffit"}, - {"tk", "application/x-tcl"}, - {"tcl", "application/x-tcl"}, - {"crt", "application/x-x509-ca-cert"}, - {"pem", "application/x-x509-ca-cert"}, - {"der", "application/x-x509-ca-cert"}, - {"xpi", "application/x-xpinstall"}, - {"xhtml", "application/xhtml+xml"}, - {"xspf", "application/xspf+xml"}, - {"zip", "application/zip"}, - {"dll", "application/octet-stream"}, - {"exe", "application/octet-stream"}, - {"bin", "application/octet-stream"}, - {"deb", "application/octet-stream"}, - {"dmg", "application/octet-stream"}, - {"img", "application/octet-stream"}, - {"iso", "application/octet-stream"}, - {"msm", "application/octet-stream"}, - {"msp", "application/octet-stream"}, - {"msi", "application/octet-stream"}, - {"kar", "audio/midi"}, - {"midi", "audio/midi"}, - {"mid", "audio/midi"}, - {"mp3", "audio/mpeg"}, - {"ogg", "audio/ogg"}, - {"m4a", "audio/x-m4a"}, - {"ra", "audio/x-realaudio"}, - {"3gp", "video/3gpp"}, - {"3gpp", "video/3gpp"}, - {"ts", "video/mp2t"}, - {"mp4", "video/mp4"}, - {"mpg", "video/mpeg"}, - {"mpeg", "video/mpeg"}, - {"mov", "video/quicktime"}, - {"webm", "video/webm"}, - {"flv", "video/x-flv"}, - {"m4v", "video/x-m4v"}, - {"mng", "video/x-mng"}, - {"asf", "video/x-ms-asf"}, - {"asx", "video/x-ms-asf"}, - {"wmv", "video/x-ms-wmv"}, - {"avi", "video/x-msvideo"}}; -} - - - -#pragma once - -#include -#include -#include - -namespace crow -{ - /// Hashing function for ci_map (unordered_multimap). - struct ci_hash - { - size_t operator()(const std::string& key) const - { - std::size_t seed = 0; - std::locale locale; - - for (auto c : key) - { - boost::hash_combine(seed, std::toupper(c, locale)); - } - - return seed; - } - }; - - /// Equals function for ci_map (unordered_multimap). - struct ci_key_eq - { - bool operator()(const std::string& l, const std::string& r) const - { - return boost::iequals(l, r); - } - }; - - using ci_map = std::unordered_multimap; -} // namespace crow - - - -#pragma once - -#include - -namespace crow -{ - /// An abstract class that allows any other class to be returned by a handler. - struct returnable - { - std::string content_type; - virtual std::string dump() const = 0; - - returnable(std::string ctype): - content_type{ctype} - {} - - virtual ~returnable(){}; - }; -} // namespace crow - - - -#pragma once - - - - -#include -#include -#include -#include -#include -#include - -namespace crow -{ - enum class LogLevel - { -#ifndef ERROR -#ifndef DEBUG - DEBUG = 0, - INFO, - WARNING, - ERROR, - CRITICAL, -#endif -#endif - - Debug = 0, - Info, - Warning, - Error, - Critical, - }; - - class ILogHandler - { - public: - virtual void log(std::string message, LogLevel level) = 0; - }; - - class CerrLogHandler : public ILogHandler - { - public: - void log(std::string message, LogLevel level) override - { - std::string prefix; - switch (level) - { - case LogLevel::Debug: - prefix = "DEBUG "; - break; - case LogLevel::Info: - prefix = "INFO "; - break; - case LogLevel::Warning: - prefix = "WARNING "; - break; - case LogLevel::Error: - prefix = "ERROR "; - break; - case LogLevel::Critical: - prefix = "CRITICAL"; - break; - } - std::cerr << std::string("(") + timestamp() + std::string(") [") + prefix + std::string("] ") + message << std::endl; - } - - private: - static std::string timestamp() - { - char date[32]; - time_t t = time(0); - - tm my_tm; - -#if defined(_MSC_VER) || defined(__MINGW32__) -#ifdef CROW_USE_LOCALTIMEZONE - localtime_s(&my_tm, &t); -#else - gmtime_s(&my_tm, &t); -#endif -#else -#ifdef CROW_USE_LOCALTIMEZONE - localtime_r(&t, &my_tm); -#else - gmtime_r(&t, &my_tm); -#endif -#endif - - size_t sz = strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", &my_tm); - return std::string(date, date + sz); - } - }; - - class logger - { - public: - logger(LogLevel level): - level_(level) - {} - ~logger() - { -#ifdef CROW_ENABLE_LOGGING - if (level_ >= get_current_log_level()) - { - get_handler_ref()->log(stringstream_.str(), level_); - } -#endif - } - - // - template - logger& operator<<(T const& value) - { -#ifdef CROW_ENABLE_LOGGING - if (level_ >= get_current_log_level()) - { - stringstream_ << value; - } -#endif - return *this; - } - - // - static void setLogLevel(LogLevel level) { get_log_level_ref() = level; } - - static void setHandler(ILogHandler* handler) { get_handler_ref() = handler; } - - static LogLevel get_current_log_level() { return get_log_level_ref(); } - - private: - // - static LogLevel& get_log_level_ref() - { - static LogLevel current_level = static_cast(CROW_LOG_LEVEL); - return current_level; - } - static ILogHandler*& get_handler_ref() - { - static CerrLogHandler default_handler; - static ILogHandler* current_handler = &default_handler; - return current_handler; - } - - // - std::ostringstream stringstream_; - LogLevel level_; - }; -} // namespace crow - -#define CROW_LOG_CRITICAL \ - if (crow::logger::get_current_log_level() <= crow::LogLevel::Critical) \ - crow::logger(crow::LogLevel::Critical) -#define CROW_LOG_ERROR \ - if (crow::logger::get_current_log_level() <= crow::LogLevel::Error) \ - crow::logger(crow::LogLevel::Error) -#define CROW_LOG_WARNING \ - if (crow::logger::get_current_log_level() <= crow::LogLevel::Warning) \ - crow::logger(crow::LogLevel::Warning) -#define CROW_LOG_INFO \ - if (crow::logger::get_current_log_level() <= crow::LogLevel::Info) \ - crow::logger(crow::LogLevel::Info) -#define CROW_LOG_DEBUG \ - if (crow::logger::get_current_log_level() <= crow::LogLevel::Debug) \ - crow::logger(crow::LogLevel::Debug) - - - -#pragma once - -namespace crow -{ - constexpr const char VERSION[] = "1.0"; -} - - - -/* - * - * TinySHA1 - a header only implementation of the SHA1 algorithm in C++. Based - * on the implementation in boost::uuid::details. - * - * SHA1 Wikipedia Page: http://en.wikipedia.org/wiki/SHA-1 - * - * Copyright (c) 2012-22 SAURAV MOHAPATRA - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ -#ifndef _TINY_SHA1_HPP_ -#define _TINY_SHA1_HPP_ -#include -#include -#include -#include -namespace sha1 -{ - class SHA1 - { - public: - typedef uint32_t digest32_t[5]; - typedef uint8_t digest8_t[20]; - inline static uint32_t LeftRotate(uint32_t value, size_t count) { - return (value << count) ^ (value >> (32-count)); - } - SHA1(){ reset(); } - virtual ~SHA1() {} - SHA1(const SHA1& s) { *this = s; } - const SHA1& operator = (const SHA1& s) { - memcpy(m_digest, s.m_digest, 5 * sizeof(uint32_t)); - memcpy(m_block, s.m_block, 64); - m_blockByteIndex = s.m_blockByteIndex; - m_byteCount = s.m_byteCount; - return *this; - } - SHA1& reset() { - m_digest[0] = 0x67452301; - m_digest[1] = 0xEFCDAB89; - m_digest[2] = 0x98BADCFE; - m_digest[3] = 0x10325476; - m_digest[4] = 0xC3D2E1F0; - m_blockByteIndex = 0; - m_byteCount = 0; - return *this; - } - SHA1& processByte(uint8_t octet) { - this->m_block[this->m_blockByteIndex++] = octet; - ++this->m_byteCount; - if(m_blockByteIndex == 64) { - this->m_blockByteIndex = 0; - processBlock(); - } - return *this; - } - SHA1& processBlock(const void* const start, const void* const end) { - const uint8_t* begin = static_cast(start); - const uint8_t* finish = static_cast(end); - while(begin != finish) { - processByte(*begin); - begin++; - } - return *this; - } - SHA1& processBytes(const void* const data, size_t len) { - const uint8_t* block = static_cast(data); - processBlock(block, block + len); - return *this; - } - const uint32_t* getDigest(digest32_t digest) { - size_t bitCount = this->m_byteCount * 8; - processByte(0x80); - if (this->m_blockByteIndex > 56) { - while (m_blockByteIndex != 0) { - processByte(0); - } - while (m_blockByteIndex < 56) { - processByte(0); - } - } else { - while (m_blockByteIndex < 56) { - processByte(0); - } - } - processByte(0); - processByte(0); - processByte(0); - processByte(0); - processByte( static_cast((bitCount>>24) & 0xFF)); - processByte( static_cast((bitCount>>16) & 0xFF)); - processByte( static_cast((bitCount>>8 ) & 0xFF)); - processByte( static_cast((bitCount) & 0xFF)); - - memcpy(digest, m_digest, 5 * sizeof(uint32_t)); - return digest; - } - const uint8_t* getDigestBytes(digest8_t digest) { - digest32_t d32; - getDigest(d32); - size_t di = 0; - digest[di++] = ((d32[0] >> 24) & 0xFF); - digest[di++] = ((d32[0] >> 16) & 0xFF); - digest[di++] = ((d32[0] >> 8) & 0xFF); - digest[di++] = ((d32[0]) & 0xFF); - - digest[di++] = ((d32[1] >> 24) & 0xFF); - digest[di++] = ((d32[1] >> 16) & 0xFF); - digest[di++] = ((d32[1] >> 8) & 0xFF); - digest[di++] = ((d32[1]) & 0xFF); - - digest[di++] = ((d32[2] >> 24) & 0xFF); - digest[di++] = ((d32[2] >> 16) & 0xFF); - digest[di++] = ((d32[2] >> 8) & 0xFF); - digest[di++] = ((d32[2]) & 0xFF); - - digest[di++] = ((d32[3] >> 24) & 0xFF); - digest[di++] = ((d32[3] >> 16) & 0xFF); - digest[di++] = ((d32[3] >> 8) & 0xFF); - digest[di++] = ((d32[3]) & 0xFF); - - digest[di++] = ((d32[4] >> 24) & 0xFF); - digest[di++] = ((d32[4] >> 16) & 0xFF); - digest[di++] = ((d32[4] >> 8) & 0xFF); - digest[di++] = ((d32[4]) & 0xFF); - return digest; - } - - protected: - void processBlock() { - uint32_t w[80]; - for (size_t i = 0; i < 16; i++) { - w[i] = (m_block[i*4 + 0] << 24); - w[i] |= (m_block[i*4 + 1] << 16); - w[i] |= (m_block[i*4 + 2] << 8); - w[i] |= (m_block[i*4 + 3]); - } - for (size_t i = 16; i < 80; i++) { - w[i] = LeftRotate((w[i-3] ^ w[i-8] ^ w[i-14] ^ w[i-16]), 1); - } - - uint32_t a = m_digest[0]; - uint32_t b = m_digest[1]; - uint32_t c = m_digest[2]; - uint32_t d = m_digest[3]; - uint32_t e = m_digest[4]; - - for (std::size_t i=0; i<80; ++i) { - uint32_t f = 0; - uint32_t k = 0; - - if (i<20) { - f = (b & c) | (~b & d); - k = 0x5A827999; - } else if (i<40) { - f = b ^ c ^ d; - k = 0x6ED9EBA1; - } else if (i<60) { - f = (b & c) | (b & d) | (c & d); - k = 0x8F1BBCDC; - } else { - f = b ^ c ^ d; - k = 0xCA62C1D6; - } - uint32_t temp = LeftRotate(a, 5) + f + e + k + w[i]; - e = d; - d = c; - c = LeftRotate(b, 30); - b = a; - a = temp; - } - - m_digest[0] += a; - m_digest[1] += b; - m_digest[2] += c; - m_digest[3] += d; - m_digest[4] += e; - } - private: - digest32_t m_digest; - uint8_t m_block[64]; - size_t m_blockByteIndex; - size_t m_byteCount; - }; -} -#endif - - - -#pragma once - -#include -#include -#include -#include -#include -#include -#include - -namespace crow -{ -// ---------------------------------------------------------------------------- -// qs_parse (modified) -// https://github.com/bartgrantham/qs_parse -// ---------------------------------------------------------------------------- -/* Similar to strncmp, but handles URL-encoding for either string */ -int qs_strncmp(const char * s, const char * qs, size_t n); - - -/* Finds the beginning of each key/value pair and stores a pointer in qs_kv. - * Also decodes the value portion of the k/v pair *in-place*. In a future - * enhancement it will also have a compile-time option of sorting qs_kv - * alphabetically by key. */ -int qs_parse(char * qs, char * qs_kv[], int qs_kv_size); - - -/* Used by qs_parse to decode the value portion of a k/v pair */ -int qs_decode(char * qs); - - -/* Looks up the value according to the key on a pre-processed query string - * A future enhancement will be a compile-time option to look up the key - * in a pre-sorted qs_kv array via a binary search. */ -//char * qs_k2v(const char * key, char * qs_kv[], int qs_kv_size); - char * qs_k2v(const char * key, char * const * qs_kv, int qs_kv_size, int nth); - - -/* Non-destructive lookup of value, based on key. User provides the - * destinaton string and length. */ -char * qs_scanvalue(const char * key, const char * qs, char * val, size_t val_len); - -// TODO: implement sorting of the qs_kv array; for now ensure it's not compiled -#undef _qsSORTING - -// isxdigit _is_ available in , but let's avoid another header instead -#define CROW_QS_ISHEX(x) ((((x)>='0'&&(x)<='9') || ((x)>='A'&&(x)<='F') || ((x)>='a'&&(x)<='f')) ? 1 : 0) -#define CROW_QS_HEX2DEC(x) (((x)>='0'&&(x)<='9') ? (x)-48 : ((x)>='A'&&(x)<='F') ? (x)-55 : ((x)>='a'&&(x)<='f') ? (x)-87 : 0) -#define CROW_QS_ISQSCHR(x) ((((x)=='=')||((x)=='#')||((x)=='&')||((x)=='\0')) ? 0 : 1) - -inline int qs_strncmp(const char * s, const char * qs, size_t n) -{ - int i=0; - unsigned char u1, u2, unyb, lnyb; - - while(n-- > 0) - { - u1 = static_cast(*s++); - u2 = static_cast(*qs++); - - if ( ! CROW_QS_ISQSCHR(u1) ) { u1 = '\0'; } - if ( ! CROW_QS_ISQSCHR(u2) ) { u2 = '\0'; } - - if ( u1 == '+' ) { u1 = ' '; } - if ( u1 == '%' ) // easier/safer than scanf - { - unyb = static_cast(*s++); - lnyb = static_cast(*s++); - if ( CROW_QS_ISHEX(unyb) && CROW_QS_ISHEX(lnyb) ) - u1 = (CROW_QS_HEX2DEC(unyb) * 16) + CROW_QS_HEX2DEC(lnyb); - else - u1 = '\0'; - } - - if ( u2 == '+' ) { u2 = ' '; } - if ( u2 == '%' ) // easier/safer than scanf - { - unyb = static_cast(*qs++); - lnyb = static_cast(*qs++); - if ( CROW_QS_ISHEX(unyb) && CROW_QS_ISHEX(lnyb) ) - u2 = (CROW_QS_HEX2DEC(unyb) * 16) + CROW_QS_HEX2DEC(lnyb); - else - u2 = '\0'; - } - - if ( u1 != u2 ) - return u1 - u2; - if ( u1 == '\0' ) - return 0; - i++; - } - if ( CROW_QS_ISQSCHR(*qs) ) - return -1; - else - return 0; -} - - -inline int qs_parse(char * qs, char * qs_kv[], int qs_kv_size) -{ - int i, j; - char * substr_ptr; - - for(i=0; i means x iterations of this loop -> means *x+1* k/v pairs - - // we only decode the values in place, the keys could have '='s in them - // which will hose our ability to distinguish keys from values later - for(j=0; j> qs_dict_name2kv(const char * dict_name, char * const * qs_kv, int qs_kv_size, int nth = 0) -{ - int i; - size_t name_len, skip_to_eq, skip_to_brace_open, skip_to_brace_close; - - name_len = strlen(dict_name); - -#ifdef _qsSORTING -// TODO: binary search for key in the sorted qs_kv -#else // _qsSORTING - for(i=0; i 0 && - skip_to_brace_close > 0 && - nth == 0 ) - { - auto key = std::string(qs_kv[i] + skip_to_brace_open, skip_to_brace_close - skip_to_brace_open); - auto value = std::string(qs_kv[i] + skip_to_eq); - return boost::make_optional(std::make_pair(key, value)); - } - else - { - --nth; - } - } - } -#endif // _qsSORTING - - return boost::none; -} - - -inline char * qs_scanvalue(const char * key, const char * qs, char * val, size_t val_len) -{ - size_t i, key_len; - const char * tmp; - - // find the beginning of the k/v substrings - if ( (tmp = strchr(qs, '?')) != NULL ) - qs = tmp + 1; - - key_len = strlen(key); - while(qs[0] != '#' && qs[0] != '\0') - { - if ( qs_strncmp(key, qs, key_len) == 0 ) - break; - qs += strcspn(qs, "&") + 1; - } - - if ( qs[0] == '\0' ) return NULL; - - qs += strcspn(qs, "=&#"); - if ( qs[0] == '=' ) - { - qs++; - i = strcspn(qs, "&=#"); -#ifdef _MSC_VER - strncpy_s(val, val_len, qs, (val_len - 1)<(i + 1) ? (val_len - 1) : (i + 1)); -#else - strncpy(val, qs, (val_len - 1)<(i + 1) ? (val_len - 1) : (i + 1)); -#endif - qs_decode(val); - } - else - { - if ( val_len > 0 ) - val[0] = '\0'; - } - - return val; -} -} -// ---------------------------------------------------------------------------- - - -namespace crow -{ - /// A class to represent any data coming after the `?` in the request URL into key-value pairs. - class query_string - { - public: - static const int MAX_KEY_VALUE_PAIRS_COUNT = 256; - - query_string() - { - - } - - query_string(const query_string& qs) - : url_(qs.url_) - { - for(auto p:qs.key_value_pairs_) - { - key_value_pairs_.push_back((char*)(p-qs.url_.c_str()+url_.c_str())); - } - } - - query_string& operator = (const query_string& qs) - { - url_ = qs.url_; - key_value_pairs_.clear(); - for(auto p:qs.key_value_pairs_) - { - key_value_pairs_.push_back((char*)(p-qs.url_.c_str()+url_.c_str())); - } - return *this; - } - - query_string& operator = (query_string&& qs) - { - key_value_pairs_ = std::move(qs.key_value_pairs_); - char* old_data = (char*)qs.url_.c_str(); - url_ = std::move(qs.url_); - for(auto& p:key_value_pairs_) - { - p += (char*)url_.c_str() - old_data; - } - return *this; - } - - - query_string(std::string url) - : url_(std::move(url)) - { - if (url_.empty()) - return; - - key_value_pairs_.resize(MAX_KEY_VALUE_PAIRS_COUNT); - - int count = qs_parse(&url_[0], &key_value_pairs_[0], MAX_KEY_VALUE_PAIRS_COUNT); - key_value_pairs_.resize(count); - } - - void clear() - { - key_value_pairs_.clear(); - url_.clear(); - } - - friend std::ostream& operator<<(std::ostream& os, const query_string& qs) - { - os << "[ "; - for(size_t i = 0; i < qs.key_value_pairs_.size(); ++i) { - if (i) - os << ", "; - os << qs.key_value_pairs_[i]; - } - os << " ]"; - return os; - - } - - /// Get a value from a name, used for `?name=value`. - - /// - /// Note: this method returns the value of the first occurrence of the key only, to return all occurrences, see \ref get_list(). - char* get (const std::string& name) const - { - char* ret = qs_k2v(name.c_str(), key_value_pairs_.data(), key_value_pairs_.size()); - return ret; - } - - /// Works similar to \ref get() except it removes the item from the query string. - char* pop (const std::string& name) - { - char* ret = get(name); - if (ret != nullptr) - { - for (unsigned int i = 0; i get_dict (const std::string& name) const - { - std::unordered_map ret; - - int count = 0; - while(1) - { - if (auto element = qs_dict_name2kv(name.c_str(), key_value_pairs_.data(), key_value_pairs_.size(), count++)) - ret.insert(*element); - else - break; - } - return ret; - } - - /// Works the same as \ref get_dict() but removes the values from the query string. - std::unordered_map pop_dict (const std::string& name) - { - std::unordered_map ret = get_dict(name); - if (!ret.empty()) - { - for (unsigned int i = 0; i keys() const - { - std::vector ret; - for (auto element: key_value_pairs_) - { - std::string str_element(element); - ret.emplace_back(str_element.substr(0, str_element.find('='))); - } - return ret; - } - - private: - std::string url_; - std::vector key_value_pairs_; - }; - -} // end namespace - - - -#pragma once - -#include -#include -#include -#include -#include - - - - -namespace crow -{ - namespace detail - { - - /// A class for scheduling functions to be called after a specific amount of ticks. A tick is equal to 1 second. - class task_timer - { - public: - using task_type = std::function; - using identifier_type = size_t; - - private: - using clock_type = std::chrono::steady_clock; - using time_type = clock_type::time_point; - - public: - task_timer(boost::asio::io_service& io_service): - io_service_(io_service), deadline_timer_(io_service_) - { - deadline_timer_.expires_from_now(boost::posix_time::seconds(1)); - deadline_timer_.async_wait( - std::bind(&task_timer::tick_handler, this, std::placeholders::_1)); - } - - ~task_timer() { deadline_timer_.cancel(); } - - void cancel(identifier_type id) - { - tasks_.erase(id); - CROW_LOG_DEBUG << "task_timer cancelled: " << this << ' ' << id; - } - - /// Schedule the given task to be executed after the default amount of ticks. - - /// - /// \return identifier_type Used to cancel the thread. - /// It is not bound to this task_timer instance and in some cases could lead to - /// undefined behavior if used with other task_timer objects or after the task - /// has been successfully executed. - identifier_type schedule(const task_type& task) - { - tasks_.insert( - {++highest_id_, - {clock_type::now() + std::chrono::seconds(get_default_timeout()), - task}}); - CROW_LOG_DEBUG << "task_timer scheduled: " << this << ' ' << highest_id_; - return highest_id_; - } - - /// Schedule the given task to be executed after the given time. - - /// - /// \param timeout The amount of ticks (seconds) to wait before execution. - /// - /// \return identifier_type Used to cancel the thread. - /// It is not bound to this task_timer instance and in some cases could lead to - /// undefined behavior if used with other task_timer objects or after the task - /// has been successfully executed. - identifier_type schedule(const task_type& task, std::uint8_t timeout) - { - tasks_.insert({++highest_id_, - {clock_type::now() + std::chrono::seconds(timeout), task}}); - CROW_LOG_DEBUG << "task_timer scheduled: " << this << ' ' << highest_id_; - return highest_id_; - } - - /// Set the default timeout for this task_timer instance. (Default: 5) - - /// - /// \param timeout The amount of ticks (seconds) to wait before execution. - void set_default_timeout(std::uint8_t timeout) { default_timeout_ = timeout; } - - /// Get the default timeout. (Default: 5) - std::uint8_t get_default_timeout() const { return default_timeout_; } - - private: - void process_tasks() - { - time_type current_time = clock_type::now(); - std::vector finished_tasks; - - for (const auto& task : tasks_) - { - if (task.second.first < current_time) - { - (task.second.second)(); - finished_tasks.push_back(task.first); - CROW_LOG_DEBUG << "task_timer called: " << this << ' ' << task.first; - } - } - - for (const auto& task : finished_tasks) - tasks_.erase(task); - - // If no task is currently scheduled, reset the issued ids back to 0. - if (tasks_.empty()) highest_id_ = 0; - } - - void tick_handler(const boost::system::error_code& ec) - { - if (ec) return; - - process_tasks(); - - deadline_timer_.expires_from_now(boost::posix_time::seconds(1)); - deadline_timer_.async_wait( - std::bind(&task_timer::tick_handler, this, std::placeholders::_1)); - } - - private: - std::uint8_t default_timeout_{5}; - boost::asio::io_service& io_service_; - boost::asio::deadline_timer deadline_timer_; - std::map> tasks_; - - // A continuosly increasing number to be issued to threads to identify them. - // If no tasks are scheduled, it will be reset to 0. - identifier_type highest_id_{0}; - }; - } // namespace detail -} // namespace crow - - - -#pragma once -#include -#ifdef CROW_ENABLE_SSL -#include -#endif - - -#if BOOST_VERSION >= 107000 -#define GET_IO_SERVICE(s) ((boost::asio::io_context&)(s).get_executor().context()) -#else -#define GET_IO_SERVICE(s) ((s).get_io_service()) -#endif -namespace crow -{ - using namespace boost; - using tcp = asio::ip::tcp; - - /// A wrapper for the asio::ip::tcp::socket and asio::ssl::stream - struct SocketAdaptor - { - using context = void; - SocketAdaptor(boost::asio::io_service& io_service, context*): - socket_(io_service) - {} - - boost::asio::io_service& get_io_service() - { - return GET_IO_SERVICE(socket_); - } - - /// Get the TCP socket handling data trasfers, regardless of what layer is handling transfers on top of the socket. - tcp::socket& raw_socket() - { - return socket_; - } - - /// Get the object handling data transfers, this can be either a TCP socket or an SSL stream (if SSL is enabled). - tcp::socket& socket() - { - return socket_; - } - - tcp::endpoint remote_endpoint() - { - return socket_.remote_endpoint(); - } - - bool is_open() - { - return socket_.is_open(); - } - - void close() - { - boost::system::error_code ec; - socket_.close(ec); - } - - void shutdown_readwrite() - { - boost::system::error_code ec; - socket_.shutdown(boost::asio::socket_base::shutdown_type::shutdown_both, ec); - } - - void shutdown_write() - { - boost::system::error_code ec; - socket_.shutdown(boost::asio::socket_base::shutdown_type::shutdown_send, ec); - } - - void shutdown_read() - { - boost::system::error_code ec; - socket_.shutdown(boost::asio::socket_base::shutdown_type::shutdown_receive, ec); - } - - template - void start(F f) - { - f(boost::system::error_code()); - } - - tcp::socket socket_; - }; - -#ifdef CROW_ENABLE_SSL - struct SSLAdaptor - { - using context = boost::asio::ssl::context; - using ssl_socket_t = boost::asio::ssl::stream; - SSLAdaptor(boost::asio::io_service& io_service, context* ctx): - ssl_socket_(new ssl_socket_t(io_service, *ctx)) - {} - - boost::asio::ssl::stream& socket() - { - return *ssl_socket_; - } - - tcp::socket::lowest_layer_type& - raw_socket() - { - return ssl_socket_->lowest_layer(); - } - - tcp::endpoint remote_endpoint() - { - return raw_socket().remote_endpoint(); - } - - bool is_open() - { - return ssl_socket_ ? raw_socket().is_open() : false; - } - - void close() - { - if (is_open()) - { - boost::system::error_code ec; - raw_socket().close(ec); - } - } - - void shutdown_readwrite() - { - if (is_open()) - { - boost::system::error_code ec; - raw_socket().shutdown(boost::asio::socket_base::shutdown_type::shutdown_both, ec); - } - } - - void shutdown_write() - { - if (is_open()) - { - boost::system::error_code ec; - raw_socket().shutdown(boost::asio::socket_base::shutdown_type::shutdown_send, ec); - } - } - - void shutdown_read() - { - if (is_open()) - { - boost::system::error_code ec; - raw_socket().shutdown(boost::asio::socket_base::shutdown_type::shutdown_receive, ec); - } - } - - boost::asio::io_service& get_io_service() - { - return GET_IO_SERVICE(raw_socket()); - } - - template - void start(F f) - { - ssl_socket_->async_handshake(boost::asio::ssl::stream_base::server, - [f](const boost::system::error_code& ec) { - f(ec); - }); - } - - std::unique_ptr> ssl_socket_; - }; -#endif -} // namespace crow - - - -#pragma once - -#include -#include -#include -#include -#include -#include -#include -#include - - - - -// TODO(EDev): Adding C++20's [[likely]] and [[unlikely]] attributes might be useful -#if defined(__GNUG__) || defined(__clang__) -#define CROW_LIKELY(X) __builtin_expect(!!(X), 1) -#define CROW_UNLIKELY(X) __builtin_expect(!!(X), 0) -#else -#define CROW_LIKELY(X) (X) -#define CROW_UNLIKELY(X) (X) -#endif - -namespace crow -{ - /// @cond SKIP - namespace black_magic - { -#ifndef CROW_MSVC_WORKAROUND - /// Out of Range Exception for const_str - struct OutOfRange - { - OutOfRange(unsigned /*pos*/, unsigned /*length*/) {} - }; - /// Helper function to throw an exception if i is larger than len - constexpr unsigned requires_in_range(unsigned i, unsigned len) - { - return i >= len ? throw OutOfRange(i, len) : i; - } - - /// A constant string implementation. - class const_str - { - const char* const begin_; - unsigned size_; - - public: - template - constexpr const_str(const char (&arr)[N]): - begin_(arr), size_(N - 1) - { - static_assert(N >= 1, "not a string literal"); - } - constexpr char operator[](unsigned i) const - { - return requires_in_range(i, size_), begin_[i]; - } - - constexpr operator const char*() const - { - return begin_; - } - - constexpr const char* begin() const { return begin_; } - constexpr const char* end() const { return begin_ + size_; } - - constexpr unsigned size() const - { - return size_; - } - }; - - constexpr unsigned find_closing_tag(const_str s, unsigned p) - { - return s[p] == '>' ? p : find_closing_tag(s, p + 1); - } - - /// Check that the CROW_ROUTE string is valid - constexpr bool is_valid(const_str s, unsigned i = 0, int f = 0) - { - return i == s.size() ? f == 0 : - f < 0 || f >= 2 ? false : - s[i] == '<' ? is_valid(s, i + 1, f + 1) : - s[i] == '>' ? is_valid(s, i + 1, f - 1) : - is_valid(s, i + 1, f); - } - - constexpr bool is_equ_p(const char* a, const char* b, unsigned n) - { - return *a == 0 && *b == 0 && n == 0 ? true : - (*a == 0 || *b == 0) ? false : - n == 0 ? true : - *a != *b ? false : - is_equ_p(a + 1, b + 1, n - 1); - } - - constexpr bool is_equ_n(const_str a, unsigned ai, const_str b, unsigned bi, unsigned n) - { - return ai + n > a.size() || bi + n > b.size() ? false : - n == 0 ? true : - a[ai] != b[bi] ? false : - is_equ_n(a, ai + 1, b, bi + 1, n - 1); - } - - constexpr bool is_int(const_str s, unsigned i) - { - return is_equ_n(s, i, "", 0, 5); - } - - constexpr bool is_uint(const_str s, unsigned i) - { - return is_equ_n(s, i, "", 0, 6); - } - - constexpr bool is_float(const_str s, unsigned i) - { - return is_equ_n(s, i, "", 0, 7) || - is_equ_n(s, i, "", 0, 8); - } - - constexpr bool is_str(const_str s, unsigned i) - { - return is_equ_n(s, i, "", 0, 5) || - is_equ_n(s, i, "", 0, 8); - } - - constexpr bool is_path(const_str s, unsigned i) - { - return is_equ_n(s, i, "", 0, 6); - } -#endif - template - struct parameter_tag - { - static const int value = 0; - }; -#define CROW_INTERNAL_PARAMETER_TAG(t, i) \ - template<> \ - struct parameter_tag \ - { \ - static const int value = i; \ - } - CROW_INTERNAL_PARAMETER_TAG(int, 1); - CROW_INTERNAL_PARAMETER_TAG(char, 1); - CROW_INTERNAL_PARAMETER_TAG(short, 1); - CROW_INTERNAL_PARAMETER_TAG(long, 1); - CROW_INTERNAL_PARAMETER_TAG(long long, 1); - CROW_INTERNAL_PARAMETER_TAG(unsigned int, 2); - CROW_INTERNAL_PARAMETER_TAG(unsigned char, 2); - CROW_INTERNAL_PARAMETER_TAG(unsigned short, 2); - CROW_INTERNAL_PARAMETER_TAG(unsigned long, 2); - CROW_INTERNAL_PARAMETER_TAG(unsigned long long, 2); - CROW_INTERNAL_PARAMETER_TAG(double, 3); - CROW_INTERNAL_PARAMETER_TAG(std::string, 4); -#undef CROW_INTERNAL_PARAMETER_TAG - template - struct compute_parameter_tag_from_args_list; - - template<> - struct compute_parameter_tag_from_args_list<> - { - static const int value = 0; - }; - - template - struct compute_parameter_tag_from_args_list - { - static const int sub_value = - compute_parameter_tag_from_args_list::value; - static const int value = - parameter_tag::type>::value ? sub_value * 6 + parameter_tag::type>::value : sub_value; - }; - - static inline bool is_parameter_tag_compatible(uint64_t a, uint64_t b) - { - if (a == 0) - return b == 0; - if (b == 0) - return a == 0; - int sa = a % 6; - int sb = a % 6; - if (sa == 5) sa = 4; - if (sb == 5) sb = 4; - if (sa != sb) - return false; - return is_parameter_tag_compatible(a / 6, b / 6); - } - - static inline unsigned find_closing_tag_runtime(const char* s, unsigned p) - { - return s[p] == 0 ? throw std::runtime_error("unmatched tag <") : - s[p] == '>' ? p : - find_closing_tag_runtime(s, p + 1); - } - - static inline uint64_t get_parameter_tag_runtime(const char* s, unsigned p = 0) - { - return s[p] == 0 ? 0 : - s[p] == '<' ? ( - std::strncmp(s + p, "", 5) == 0 ? get_parameter_tag_runtime(s, find_closing_tag_runtime(s, p)) * 6 + 1 : - std::strncmp(s + p, "", 6) == 0 ? get_parameter_tag_runtime(s, find_closing_tag_runtime(s, p)) * 6 + 2 : - (std::strncmp(s + p, "", 7) == 0 || - std::strncmp(s + p, "", 8) == 0) ? - get_parameter_tag_runtime(s, find_closing_tag_runtime(s, p)) * 6 + 3 : - (std::strncmp(s + p, "", 5) == 0 || - std::strncmp(s + p, "", 8) == 0) ? - get_parameter_tag_runtime(s, find_closing_tag_runtime(s, p)) * 6 + 4 : - std::strncmp(s + p, "", 6) == 0 ? get_parameter_tag_runtime(s, find_closing_tag_runtime(s, p)) * 6 + 5 : - throw std::runtime_error("invalid parameter type")) : - get_parameter_tag_runtime(s, p + 1); - } -#ifndef CROW_MSVC_WORKAROUND - constexpr uint64_t get_parameter_tag(const_str s, unsigned p = 0) - { - return p == s.size() ? 0 : - s[p] == '<' ? ( - is_int(s, p) ? get_parameter_tag(s, find_closing_tag(s, p)) * 6 + 1 : - is_uint(s, p) ? get_parameter_tag(s, find_closing_tag(s, p)) * 6 + 2 : - is_float(s, p) ? get_parameter_tag(s, find_closing_tag(s, p)) * 6 + 3 : - is_str(s, p) ? get_parameter_tag(s, find_closing_tag(s, p)) * 6 + 4 : - is_path(s, p) ? get_parameter_tag(s, find_closing_tag(s, p)) * 6 + 5 : - throw std::runtime_error("invalid parameter type")) : - get_parameter_tag(s, p + 1); - } -#endif - - template - struct S - { - template - using push = S; - template - using push_back = S; - template class U> - using rebind = U; - }; - - // Check whether the template function can be called with specific arguments - template - struct CallHelper; - template - struct CallHelper> - { - template()(std::declval()...))> - static char __test(int); - - template - static int __test(...); - - static constexpr bool value = sizeof(__test(0)) == sizeof(char); - }; - - // Check Tuple contains type T - template - struct has_type; - - template - struct has_type> : std::false_type - {}; - - template - struct has_type> : has_type> - {}; - - template - struct has_type> : std::true_type - {}; - - // Kind of fold expressions in C++11 - template - struct bool_pack; - template - using all_true = std::is_same, bool_pack>; - - template - struct single_tag_to_type - {}; - - template<> - struct single_tag_to_type<1> - { - using type = int64_t; - }; - - template<> - struct single_tag_to_type<2> - { - using type = uint64_t; - }; - - template<> - struct single_tag_to_type<3> - { - using type = double; - }; - - template<> - struct single_tag_to_type<4> - { - using type = std::string; - }; - - template<> - struct single_tag_to_type<5> - { - using type = std::string; - }; - - - template - struct arguments - { - using subarguments = typename arguments::type; - using type = - typename subarguments::template push::type>; - }; - - template<> - struct arguments<0> - { - using type = S<>; - }; - - template - struct last_element_type - { - using type = typename std::tuple_element>::type; - }; - - - template<> - struct last_element_type<> - {}; - - - // from http://stackoverflow.com/questions/13072359/c11-compile-time-array-with-logarithmic-evaluation-depth - template - using Invoke = typename T::type; - - template - struct seq - { - using type = seq; - }; - - template - struct concat; - - template - struct concat, seq> : seq - {}; - - template - using Concat = Invoke>; - - template - struct gen_seq; - template - using GenSeq = Invoke>; - - template - struct gen_seq : Concat, GenSeq> - {}; - - template<> - struct gen_seq<0> : seq<> - {}; - template<> - struct gen_seq<1> : seq<0> - {}; - - template - struct pop_back_helper; - - template - struct pop_back_helper, Tuple> - { - template class U> - using rebind = U::type...>; - }; - - template - struct pop_back //: public pop_back_helper::type, std::tuple> - { - template class U> - using rebind = typename pop_back_helper::type, std::tuple>::template rebind; - }; - - template<> - struct pop_back<> - { - template class U> - using rebind = U<>; - }; - - // from http://stackoverflow.com/questions/2118541/check-if-c0x-parameter-pack-contains-a-type - template - struct contains : std::true_type - {}; - - template - struct contains : std::conditional::value, std::true_type, contains>::type - {}; - - template - struct contains : std::false_type - {}; - - template - struct empty_context - {}; - - template - struct promote - { - using type = T; - }; - -#define CROW_INTERNAL_PROMOTE_TYPE(t1, t2) \ - template<> \ - struct promote \ - { \ - using type = t2; \ - } - - CROW_INTERNAL_PROMOTE_TYPE(char, int64_t); - CROW_INTERNAL_PROMOTE_TYPE(short, int64_t); - CROW_INTERNAL_PROMOTE_TYPE(int, int64_t); - CROW_INTERNAL_PROMOTE_TYPE(long, int64_t); - CROW_INTERNAL_PROMOTE_TYPE(long long, int64_t); - CROW_INTERNAL_PROMOTE_TYPE(unsigned char, uint64_t); - CROW_INTERNAL_PROMOTE_TYPE(unsigned short, uint64_t); - CROW_INTERNAL_PROMOTE_TYPE(unsigned int, uint64_t); - CROW_INTERNAL_PROMOTE_TYPE(unsigned long, uint64_t); - CROW_INTERNAL_PROMOTE_TYPE(unsigned long long, uint64_t); - CROW_INTERNAL_PROMOTE_TYPE(float, double); -#undef CROW_INTERNAL_PROMOTE_TYPE - - template - using promote_t = typename promote::type; - - } // namespace black_magic - - namespace detail - { - - template - struct get_index_of_element_from_tuple_by_type_impl - { - static constexpr auto value = N; - }; - - template - struct get_index_of_element_from_tuple_by_type_impl - { - static constexpr auto value = N; - }; - - template - struct get_index_of_element_from_tuple_by_type_impl - { - static constexpr auto value = get_index_of_element_from_tuple_by_type_impl::value; - }; - - } // namespace detail - - namespace utility - { - template - T& get_element_by_type(std::tuple& t) - { - return std::get::value>(t); - } - - template - struct function_traits; - -#ifndef CROW_MSVC_WORKAROUND - template - struct function_traits : public function_traits - { - using parent_t = function_traits; - static const size_t arity = parent_t::arity; - using result_type = typename parent_t::result_type; - template - using arg = typename parent_t::template arg; - }; -#endif - - template - struct function_traits - { - static const size_t arity = sizeof...(Args); - - typedef R result_type; - - template - using arg = typename std::tuple_element>::type; - }; - - template - struct function_traits - { - static const size_t arity = sizeof...(Args); - - typedef R result_type; - - template - using arg = typename std::tuple_element>::type; - }; - - template - struct function_traits> - { - static const size_t arity = sizeof...(Args); - - typedef R result_type; - - template - using arg = typename std::tuple_element>::type; - }; - /// @endcond - - inline static std::string base64encode(const unsigned char* data, size_t size, const char* key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/") - { - std::string ret; - ret.resize((size + 2) / 3 * 4); - auto it = ret.begin(); - while (size >= 3) - { - *it++ = key[(static_cast(*data) & 0xFC) >> 2]; - unsigned char h = (static_cast(*data++) & 0x03) << 4; - *it++ = key[h | ((static_cast(*data) & 0xF0) >> 4)]; - h = (static_cast(*data++) & 0x0F) << 2; - *it++ = key[h | ((static_cast(*data) & 0xC0) >> 6)]; - *it++ = key[static_cast(*data++) & 0x3F]; - - size -= 3; - } - if (size == 1) - { - *it++ = key[(static_cast(*data) & 0xFC) >> 2]; - unsigned char h = (static_cast(*data++) & 0x03) << 4; - *it++ = key[h]; - *it++ = '='; - *it++ = '='; - } - else if (size == 2) - { - *it++ = key[(static_cast(*data) & 0xFC) >> 2]; - unsigned char h = (static_cast(*data++) & 0x03) << 4; - *it++ = key[h | ((static_cast(*data) & 0xF0) >> 4)]; - h = (static_cast(*data++) & 0x0F) << 2; - *it++ = key[h]; - *it++ = '='; - } - return ret; - } - - inline static std::string base64encode(std::string data, size_t size, const char* key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/") - { - return base64encode((const unsigned char*)data.c_str(), size, key); - } - - inline static std::string base64encode_urlsafe(const unsigned char* data, size_t size) - { - return base64encode(data, size, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"); - } - - inline static std::string base64encode_urlsafe(std::string data, size_t size) - { - return base64encode((const unsigned char*)data.c_str(), size, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"); - } - - inline static std::string base64decode(const char* data, size_t size) - { - // We accept both regular and url encoding here, as there does not seem to be any downside to that. - // If we want to distinguish that we should use +/ for non-url and -_ for url. - - // Mapping logic from characters to [0-63] - auto key = [](char c) -> unsigned char { - if ((c >= 'A') && (c <= 'Z')) return c - 'A'; - if ((c >= 'a') && (c <= 'z')) return c - 'a' + 26; - if ((c >= '0') && (c <= '9')) return c - '0' + 52; - if ((c == '+') || (c == '-')) return 62; - if ((c == '/') || (c == '_')) return 63; - return 0; - }; - - // Not padded - if (size % 4 == 2) // missing last 2 characters - size = (size / 4 * 3) + 1; // Not subtracting extra characters because they're truncated in int division - else if (size % 4 == 3) // missing last character - size = (size / 4 * 3) + 2; // Not subtracting extra characters because they're truncated in int division - - // Padded - else if (data[size - 2] == '=') // padded with '==' - size = (size / 4 * 3) - 2; // == padding means the last block only has 1 character instead of 3, hence the '-2' - else if (data[size - 1] == '=') // padded with '=' - size = (size / 4 * 3) - 1; // = padding means the last block only has 2 character instead of 3, hence the '-1' - - // Padding not needed - else - size = size / 4 * 3; - - std::string ret; - ret.resize(size); - auto it = ret.begin(); - - // These will be used to decode 1 character at a time - unsigned char odd; // char1 and char3 - unsigned char even; // char2 and char4 - - // Take 4 character blocks to turn into 3 - while (size >= 3) - { - // dec_char1 = (char1 shifted 2 bits to the left) OR ((char2 AND 00110000) shifted 4 bits to the right)) - odd = key(*data++); - even = key(*data++); - *it++ = (odd << 2) | ((even & 0x30) >> 4); - // dec_char2 = ((char2 AND 00001111) shifted 4 bits left) OR ((char3 AND 00111100) shifted 2 bits right)) - odd = key(*data++); - *it++ = ((even & 0x0F) << 4) | ((odd & 0x3C) >> 2); - // dec_char3 = ((char3 AND 00000011) shifted 6 bits left) OR (char4) - even = key(*data++); - *it++ = ((odd & 0x03) << 6) | (even); - - size -= 3; - } - if (size == 2) - { - // d_char1 = (char1 shifted 2 bits to the left) OR ((char2 AND 00110000) shifted 4 bits to the right)) - odd = key(*data++); - even = key(*data++); - *it++ = (odd << 2) | ((even & 0x30) >> 4); - // d_char2 = ((char2 AND 00001111) shifted 4 bits left) OR ((char3 AND 00111100) shifted 2 bits right)) - odd = key(*data++); - *it++ = ((even & 0x0F) << 4) | ((odd & 0x3C) >> 2); - } - else if (size == 1) - { - // d_char1 = (char1 shifted 2 bits to the left) OR ((char2 AND 00110000) shifted 4 bits to the right)) - odd = key(*data++); - even = key(*data++); - *it++ = (odd << 2) | ((even & 0x30) >> 4); - } - return ret; - } - - inline static std::string base64decode(const std::string& data, size_t size) - { - return base64decode(data.data(), size); - } - - inline static std::string base64decode(const std::string& data) - { - return base64decode(data.data(), data.length()); - } - - - inline static void sanitize_filename(std::string& data, char replacement = '_') - { - if (data.length() > 255) - data.resize(255); - - static const auto toUpper = [](char c) { - return ((c >= 'a') && (c <= 'z')) ? (c - ('a' - 'A')) : c; - }; - // Check for special device names. The Windows behavior is really odd here, it will consider both AUX and AUX.txt - // a special device. Thus we search for the string (case-insensitive), and then check if the string ends or if - // is has a dangerous follow up character (.:\/) - auto sanitizeSpecialFile = [](std::string& source, unsigned ofs, const char* pattern, bool includeNumber, char replacement) { - unsigned i = ofs, len = source.length(); - const char* p = pattern; - while (*p) - { - if (i >= len) return; - if (toUpper(source[i]) != *p) return; - ++i; - ++p; - } - if (includeNumber) - { - if ((i >= len) || (source[i] < '1') || (source[i] > '9')) return; - ++i; - } - if ((i >= len) || (source[i] == '.') || (source[i] == ':') || (source[i] == '/') || (source[i] == '\\')) - { - source.erase(ofs + 1, (i - ofs) - 1); - source[ofs] = replacement; - } - }; - bool checkForSpecialEntries = true; - for (unsigned i = 0; i < data.length(); ++i) - { - // Recognize directory traversals and the special devices CON/PRN/AUX/NULL/COM[1-]/LPT[1-9] - if (checkForSpecialEntries) - { - checkForSpecialEntries = false; - switch (toUpper(data[i])) - { - case 'A': - sanitizeSpecialFile(data, i, "AUX", false, replacement); - break; - case 'C': - sanitizeSpecialFile(data, i, "CON", false, replacement); - sanitizeSpecialFile(data, i, "COM", true, replacement); - break; - case 'L': - sanitizeSpecialFile(data, i, "LPT", true, replacement); - break; - case 'N': - sanitizeSpecialFile(data, i, "NUL", false, replacement); - break; - case 'P': - sanitizeSpecialFile(data, i, "PRN", false, replacement); - break; - case '.': - sanitizeSpecialFile(data, i, "..", false, replacement); - break; - } - } - - // Sanitize individual characters - unsigned char c = data[i]; - if ((c < ' ') || ((c >= 0x80) && (c <= 0x9F)) || (c == '?') || (c == '<') || (c == '>') || (c == ':') || (c == '*') || (c == '|') || (c == '\"')) - { - data[i] = replacement; - } - else if ((c == '/') || (c == '\\')) - { - if (CROW_UNLIKELY(i == 0)) //Prevent Unix Absolute Paths (Windows Absolute Paths are prevented with `(c == ':')`) - { - data[i] = replacement; - } - else - { - checkForSpecialEntries = true; - } - } - } - } - - } // namespace utility -} // namespace crow - - - -#pragma once - -#include -#include -#include -#include - - - -namespace crow -{ - const char cr = '\r'; - const char lf = '\n'; - const std::string crlf("\r\n"); - - enum class HTTPMethod : char - { -#ifndef DELETE - DELETE = 0, - GET, - HEAD, - POST, - PUT, - - CONNECT, - OPTIONS, - TRACE, - - PATCH, - PURGE, - - COPY, - LOCK, - MKCOL, - MOVE, - PROPFIND, - PROPPATCH, - SEARCH, - UNLOCK, - BIND, - REBIND, - UNBIND, - ACL, - - REPORT, - MKACTIVITY, - CHECKOUT, - MERGE, - - MSEARCH, - NOTIFY, - SUBSCRIBE, - UNSUBSCRIBE, - - MKCALENDAR, - - LINK, - UNLINK, - - SOURCE, -#endif - - Delete = 0, - Get, - Head, - Post, - Put, - - Connect, - Options, - Trace, - - Patch, - Purge, - - Copy, - Lock, - MkCol, - Move, - Propfind, - Proppatch, - Search, - Unlock, - Bind, - Rebind, - Unbind, - Acl, - - Report, - MkActivity, - Checkout, - Merge, - - MSearch, - Notify, - Subscribe, - Unsubscribe, - - MkCalendar, - - Link, - Unlink, - - Source, - - - InternalMethodCount, - // should not add an item below this line: used for array count - }; - - constexpr const char* method_strings[] = - { - "DELETE", - "GET", - "HEAD", - "POST", - "PUT", - - "CONNECT", - "OPTIONS", - "TRACE", - - "PATCH", - "PURGE", - - "COPY", - "LOCK", - "MKCOL", - "MOVE", - "PROPFIND", - "PROPPATCH", - "SEARCH", - "UNLOCK", - "BIND", - "REBIND", - "UNBIND", - "ACL", - - "REPORT", - "MKACTIVITY", - "CHECKOUT", - "MERGE", - - "M-SEARCH", - "NOTIFY", - "SUBSCRIBE", - "UNSUBSCRIBE", - - "MKCALENDAR", - - "LINK", - "UNLINK", - - "SOURCE"}; - - - inline std::string method_name(HTTPMethod method) - { - if (CROW_LIKELY(method < HTTPMethod::InternalMethodCount)) - { - return method_strings[(unsigned char)method]; - } - return "invalid"; - } - - // clang-format off - - enum status - { - CONTINUE = 100, - SWITCHING_PROTOCOLS = 101, - - OK = 200, - CREATED = 201, - ACCEPTED = 202, - NON_AUTHORITATIVE_INFORMATION = 203, - NO_CONTENT = 204, - RESET_CONTENT = 205, - PARTIAL_CONTENT = 206, - - MULTIPLE_CHOICES = 300, - MOVED_PERMANENTLY = 301, - FOUND = 302, - SEE_OTHER = 303, - NOT_MODIFIED = 304, - TEMPORARY_REDIRECT = 307, - PERMANENT_REDIRECT = 308, - - BAD_REQUEST = 400, - UNAUTHORIZED = 401, - FORBIDDEN = 403, - NOT_FOUND = 404, - METHOD_NOT_ALLOWED = 405, - PROXY_AUTHENTICATION_REQUIRED = 407, - CONFLICT = 409, - GONE = 410, - PAYLOAD_TOO_LARGE = 413, - UNSUPPORTED_MEDIA_TYPE = 415, - RANGE_NOT_SATISFIABLE = 416, - EXPECTATION_FAILED = 417, - PRECONDITION_REQUIRED = 428, - TOO_MANY_REQUESTS = 429, - UNAVAILABLE_FOR_LEGAL_REASONS = 451, - - INTERNAL_SERVER_ERROR = 500, - NOT_IMPLEMENTED = 501, - BAD_GATEWAY = 502, - SERVICE_UNAVAILABLE = 503, - GATEWAY_TIMEOUT = 504, - VARIANT_ALSO_NEGOTIATES = 506 - }; - - // clang-format on - - enum class ParamType : char - { - INT, - UINT, - DOUBLE, - STRING, - PATH, - - MAX - }; - - /// @cond SKIP - struct routing_params - { - std::vector int_params; - std::vector uint_params; - std::vector double_params; - std::vector string_params; - - void debug_print() const - { - std::cerr << "routing_params" << std::endl; - for (auto i : int_params) - std::cerr << i << ", "; - std::cerr << std::endl; - for (auto i : uint_params) - std::cerr << i << ", "; - std::cerr << std::endl; - for (auto i : double_params) - std::cerr << i << ", "; - std::cerr << std::endl; - for (auto& i : string_params) - std::cerr << i << ", "; - std::cerr << std::endl; - } - - template - T get(unsigned) const; - }; - - template<> - inline int64_t routing_params::get(unsigned index) const - { - return int_params[index]; - } - - template<> - inline uint64_t routing_params::get(unsigned index) const - { - return uint_params[index]; - } - - template<> - inline double routing_params::get(unsigned index) const - { - return double_params[index]; - } - - template<> - inline std::string routing_params::get(unsigned index) const - { - return string_params[index]; - } - /// @endcond -} // namespace crow - -// clang-format off -#ifndef CROW_MSVC_WORKAROUND -constexpr crow::HTTPMethod method_from_string(const char* str) -{ - return crow::black_magic::is_equ_p(str, "GET", 3) ? crow::HTTPMethod::Get : - crow::black_magic::is_equ_p(str, "DELETE", 6) ? crow::HTTPMethod::Delete : - crow::black_magic::is_equ_p(str, "HEAD", 4) ? crow::HTTPMethod::Head : - crow::black_magic::is_equ_p(str, "POST", 4) ? crow::HTTPMethod::Post : - crow::black_magic::is_equ_p(str, "PUT", 3) ? crow::HTTPMethod::Put : - - crow::black_magic::is_equ_p(str, "OPTIONS", 7) ? crow::HTTPMethod::Options : - crow::black_magic::is_equ_p(str, "CONNECT", 7) ? crow::HTTPMethod::Connect : - crow::black_magic::is_equ_p(str, "TRACE", 5) ? crow::HTTPMethod::Trace : - - crow::black_magic::is_equ_p(str, "PATCH", 5) ? crow::HTTPMethod::Patch : - crow::black_magic::is_equ_p(str, "PURGE", 5) ? crow::HTTPMethod::Purge : - crow::black_magic::is_equ_p(str, "COPY", 4) ? crow::HTTPMethod::Copy : - crow::black_magic::is_equ_p(str, "LOCK", 4) ? crow::HTTPMethod::Lock : - crow::black_magic::is_equ_p(str, "MKCOL", 5) ? crow::HTTPMethod::MkCol : - crow::black_magic::is_equ_p(str, "MOVE", 4) ? crow::HTTPMethod::Move : - crow::black_magic::is_equ_p(str, "PROPFIND", 8) ? crow::HTTPMethod::Propfind : - crow::black_magic::is_equ_p(str, "PROPPATCH", 9) ? crow::HTTPMethod::Proppatch : - crow::black_magic::is_equ_p(str, "SEARCH", 6) ? crow::HTTPMethod::Search : - crow::black_magic::is_equ_p(str, "UNLOCK", 6) ? crow::HTTPMethod::Unlock : - crow::black_magic::is_equ_p(str, "BIND", 4) ? crow::HTTPMethod::Bind : - crow::black_magic::is_equ_p(str, "REBIND", 6) ? crow::HTTPMethod::Rebind : - crow::black_magic::is_equ_p(str, "UNBIND", 6) ? crow::HTTPMethod::Unbind : - crow::black_magic::is_equ_p(str, "ACL", 3) ? crow::HTTPMethod::Acl : - - crow::black_magic::is_equ_p(str, "REPORT", 6) ? crow::HTTPMethod::Report : - crow::black_magic::is_equ_p(str, "MKACTIVITY", 10) ? crow::HTTPMethod::MkActivity : - crow::black_magic::is_equ_p(str, "CHECKOUT", 8) ? crow::HTTPMethod::Checkout : - crow::black_magic::is_equ_p(str, "MERGE", 5) ? crow::HTTPMethod::Merge : - - crow::black_magic::is_equ_p(str, "MSEARCH", 7) ? crow::HTTPMethod::MSearch : - crow::black_magic::is_equ_p(str, "NOTIFY", 6) ? crow::HTTPMethod::Notify : - crow::black_magic::is_equ_p(str, "SUBSCRIBE", 9) ? crow::HTTPMethod::Subscribe : - crow::black_magic::is_equ_p(str, "UNSUBSCRIBE", 11) ? crow::HTTPMethod::Unsubscribe : - - crow::black_magic::is_equ_p(str, "MKCALENDAR", 10) ? crow::HTTPMethod::MkCalendar : - - crow::black_magic::is_equ_p(str, "LINK", 4) ? crow::HTTPMethod::Link : - crow::black_magic::is_equ_p(str, "UNLINK", 6) ? crow::HTTPMethod::Unlink : - - crow::black_magic::is_equ_p(str, "SOURCE", 6) ? crow::HTTPMethod::Source : - throw std::runtime_error("invalid http method"); -} - -constexpr crow::HTTPMethod operator"" _method(const char* str, size_t /*len*/) -{ - return method_from_string( str ); -} -#endif -// clang-format on - - - -#pragma once - -#include - - - - - - - - -namespace crow -{ - /// Find and return the value associated with the key. (returns an empty string if nothing is found) - template - inline const std::string& get_header_value(const T& headers, const std::string& key) - { - if (headers.count(key)) - { - return headers.find(key)->second; - } - static std::string empty; - return empty; - } - - /// An HTTP request. - struct request - { - HTTPMethod method; - std::string raw_url; ///< The full URL containing the `?` and URL parameters. - std::string url; ///< The endpoint without any parameters. - query_string url_params; ///< The parameters associated with the request. (everything after the `?`) - ci_map headers; - std::string body; - std::string remote_ip_address; ///< The IP address from which the request was sent. - unsigned char http_ver_major, http_ver_minor; - bool keep_alive, close_connection, upgrade; - - void* middleware_context{}; - void* middleware_container{}; - boost::asio::io_service* io_service{}; - - /// Construct an empty request. (sets the method to `GET`) - request(): - method(HTTPMethod::Get) - {} - - /// Construct a request with all values assigned. - request(HTTPMethod method, std::string raw_url, std::string url, query_string url_params, ci_map headers, std::string body, unsigned char http_major, unsigned char http_minor, bool has_keep_alive, bool has_close_connection, bool is_upgrade): - method(method), raw_url(std::move(raw_url)), url(std::move(url)), url_params(std::move(url_params)), headers(std::move(headers)), body(std::move(body)), http_ver_major(http_major), http_ver_minor(http_minor), keep_alive(has_keep_alive), close_connection(has_close_connection), upgrade(is_upgrade) - {} - - void add_header(std::string key, std::string value) - { - headers.emplace(std::move(key), std::move(value)); - } - - const std::string& get_header_value(const std::string& key) const - { - return crow::get_header_value(headers, key); - } - - bool check_version(unsigned char major, unsigned char minor) const - { - return http_ver_major == major && http_ver_minor == minor; - } - - /// Send data to whoever made this request with a completion handler and return immediately. - template - void post(CompletionHandler handler) - { - io_service->post(handler); - } - - /// Send data to whoever made this request with a completion handler. - template - void dispatch(CompletionHandler handler) - { - io_service->dispatch(handler); - } - }; -} // namespace crow - - - -#pragma once - -#include -#include -#include - - - - - - - - -namespace crow -{ - - /// Encapsulates anything related to processing and organizing `multipart/xyz` messages - namespace multipart - { - - const std::string dd = "--"; - - /// The first part in a section, contains metadata about the part - struct header - { - std::string value; ///< The first part of the header, usually `Content-Type` or `Content-Disposition` - std::unordered_map params; ///< The parameters of the header, come after the `value` - - operator int() const { return std::stoi(value); } ///< Returns \ref value as integer - operator double() const { return std::stod(value); } ///< Returns \ref value as double - }; - - /// Multipart header map (key is header key). - using mph_map = std::unordered_multimap; - - /// Find and return the value object associated with the key. (returns an empty class if nothing is found) - template - inline const O& get_header_value_object(const T& headers, const std::string& key) - { - if (headers.count(key)) - { - return headers.find(key)->second; - } - static O empty; - return empty; - } - - /// Same as \ref get_header_value_object() but for \ref multipart.header - template - inline const header& get_header_object(const T& headers, const std::string& key) - { - return get_header_value_object
(headers, key); - } - - ///One part of the multipart message - - /// - /// It is usually separated from other sections by a `boundary` - struct part - { - mph_map headers; ///< (optional) The first part before the data, Contains information regarding the type of data and encoding - std::string body; ///< The actual data in the part - - operator int() const { return std::stoi(body); } ///< Returns \ref body as integer - operator double() const { return std::stod(body); } ///< Returns \ref body as double - - const header& get_header_object(const std::string& key) const - { - return multipart::get_header_object(headers, key); - } - }; - - /// Multipart map (key is the name parameter). - using mp_map = std::unordered_multimap; - - /// The parsed multipart request/response - struct message : public returnable - { - ci_map headers; ///< The request/response headers - std::string boundary; ///< The text boundary that separates different `parts` - std::vector parts; ///< The individual parts of the message - mp_map part_map; ///< The individual parts of the message, organized in a map with the `name` header parameter being the key - - const std::string& get_header_value(const std::string& key) const - { - return crow::get_header_value(headers, key); - } - - part get_part_by_name(const std::string& name) - { - return part_map.find(name)->second; - } - - /// Represent all parts as a string (**does not include message headers**) - std::string dump() const override - { - std::stringstream str; - std::string delimiter = dd + boundary; - - for (unsigned i = 0; i < parts.size(); i++) - { - str << delimiter << crlf; - str << dump(i); - } - str << delimiter << dd << crlf; - return str.str(); - } - - /// Represent an individual part as a string - std::string dump(int part_) const - { - std::stringstream str; - part item = parts[part_]; - for (auto& item_h : item.headers) - { - str << item_h.first << ": " << item_h.second.value; - for (auto& it : item_h.second.params) - { - str << "; " << it.first << '=' << pad(it.second); - } - str << crlf; - } - str << crlf; - str << item.body << crlf; - return str.str(); - } - - /// Default constructor using default values - message(const ci_map& headers, const std::string& boundary, const std::vector& sections): - returnable("multipart/form-data; boundary=CROW-BOUNDARY"), headers(headers), boundary(boundary), parts(sections) - { - if (!boundary.empty()) - content_type = "multipart/form-data; boundary=" + boundary; - for (auto& item : parts) - { - part_map.emplace( - (get_header_object(item.headers, "Content-Disposition").params.find("name")->second), - item); - } - } - - /// Create a multipart message from a request data - message(const request& req): - returnable("multipart/form-data; boundary=CROW-BOUNDARY"), - headers(req.headers), - boundary(get_boundary(get_header_value("Content-Type"))) - { - if (!boundary.empty()) - content_type = "multipart/form-data; boundary=" + boundary; - parse_body(req.body, parts, part_map); - } - - private: - std::string get_boundary(const std::string& header) const - { - constexpr char boundary_text[] = "boundary="; - size_t found = header.find(boundary_text); - if (found) - { - std::string to_return(header.substr(found + strlen(boundary_text))); - if (to_return[0] == '\"') - { - to_return = to_return.substr(1, to_return.length() - 2); - } - return to_return; - } - return std::string(); - } - - void parse_body(std::string body, std::vector& sections, mp_map& part_map) - { - - std::string delimiter = dd + boundary; - - // TODO(EDev): Exit on error - while (body != (crlf)) - { - size_t found = body.find(delimiter); - std::string section = body.substr(0, found); - - // +2 is the CRLF. - // We don't check it and delete it so that the same delimiter can be used for The last delimiter (--delimiter--CRLF). - body.erase(0, found + delimiter.length() + 2); - if (!section.empty()) - { - part parsed_section(parse_section(section)); - part_map.emplace( - (get_header_object(parsed_section.headers, "Content-Disposition").params.find("name")->second), - parsed_section); - sections.push_back(std::move(parsed_section)); - } - } - } - - part parse_section(std::string& section) - { - struct part to_return; - - size_t found = section.find(crlf + crlf); - std::string head_line = section.substr(0, found + 2); - section.erase(0, found + 4); - - parse_section_head(head_line, to_return); - to_return.body = section.substr(0, section.length() - 2); - return to_return; - } - - void parse_section_head(std::string& lines, part& part) - { - while (!lines.empty()) - { - header to_add; - - size_t found = lines.find(crlf); - std::string line = lines.substr(0, found); - std::string key; - lines.erase(0, found + 2); - // Add the header if available - if (!line.empty()) - { - size_t found = line.find("; "); - std::string header = line.substr(0, found); - if (found != std::string::npos) - line.erase(0, found + 2); - else - line = std::string(); - - size_t header_split = header.find(": "); - key = header.substr(0, header_split); - - to_add.value = header.substr(header_split + 2); - } - - // Add the parameters - while (!line.empty()) - { - size_t found = line.find("; "); - std::string param = line.substr(0, found); - if (found != std::string::npos) - line.erase(0, found + 2); - else - line = std::string(); - - size_t param_split = param.find('='); - - std::string value = param.substr(param_split + 1); - - to_add.params.emplace(param.substr(0, param_split), trim(value)); - } - part.headers.emplace(key, to_add); - } - } - - inline std::string trim(std::string& string, const char& excess = '"') const - { - if (string.length() > 1 && string[0] == excess && string[string.length() - 1] == excess) - return string.substr(1, string.length() - 2); - return string; - } - - inline std::string pad(std::string& string, const char& padding = '"') const - { - return (padding + string + padding); - } - }; - } // namespace multipart -} // namespace crow - - - -#pragma once -#include -#include -#include -#include -#include -#include - - - - - - - - - - - - - - - -namespace crow -{ - template - class Connection; - - namespace detail - { - template - struct handler_middleware_wrapper; - } // namespace detail - - /// HTTP response - struct response - { - template - friend class crow::Connection; - - template - friend struct crow::detail::handler_middleware_wrapper; - - int code{200}; ///< The Status code for the response. - std::string body; ///< The actual payload containing the response data. - ci_map headers; ///< HTTP headers. - -#ifdef CROW_ENABLE_COMPRESSION - bool compressed = true; ///< If compression is enabled and this is false, the individual response will not be compressed. -#endif - bool skip_body = false; ///< Whether this is a response to a HEAD request. - bool manual_length_header = false; ///< Whether Crow should automatically add a "Content-Length" header. - - /// Set the value of an existing header in the response. - void set_header(std::string key, std::string value) - { - headers.erase(key); - headers.emplace(std::move(key), std::move(value)); - } - - /// Add a new header to the response. - void add_header(std::string key, std::string value) - { - headers.emplace(std::move(key), std::move(value)); - } - - const std::string& get_header_value(const std::string& key) - { - return crow::get_header_value(headers, key); - } - - // clang-format off - response() {} - explicit response(int code) : code(code) {} - response(std::string body) : body(std::move(body)) {} - response(int code, std::string body) : code(code), body(std::move(body)) {} - // clang-format on - response(returnable&& value) - { - body = value.dump(); - set_header("Content-Type", value.content_type); - } - response(returnable& value) - { - body = value.dump(); - set_header("Content-Type", value.content_type); - } - response(int code, returnable& value): - code(code) - { - body = value.dump(); - set_header("Content-Type", value.content_type); - } - - response(response&& r) - { - *this = std::move(r); - } - - response(std::string contentType, std::string body): - body(std::move(body)) - { - set_header("Content-Type", mime_types.at(contentType)); - } - - response(int code, std::string contentType, std::string body): - code(code), body(std::move(body)) - { - set_header("Content-Type", mime_types.at(contentType)); - } - - response& operator=(const response& r) = delete; - - response& operator=(response&& r) noexcept - { - body = std::move(r.body); - code = r.code; - headers = std::move(r.headers); - completed_ = r.completed_; - file_info = std::move(r.file_info); - return *this; - } - - /// Check if the response has completed (whether response.end() has been called) - bool is_completed() const noexcept - { - return completed_; - } - - void clear() - { - body.clear(); - code = 200; - headers.clear(); - completed_ = false; - file_info = static_file_info{}; - } - - /// Return a "Temporary Redirect" response. - - /// - /// Location can either be a route or a full URL. - void redirect(const std::string& location) - { - code = 307; - set_header("Location", location); - } - - /// Return a "Permanent Redirect" response. - - /// - /// Location can either be a route or a full URL. - void redirect_perm(const std::string& location) - { - code = 308; - set_header("Location", location); - } - - /// Return a "Found (Moved Temporarily)" response. - - /// - /// Location can either be a route or a full URL. - void moved(const std::string& location) - { - code = 302; - set_header("Location", location); - } - - /// Return a "Moved Permanently" response. - - /// - /// Location can either be a route or a full URL. - void moved_perm(const std::string& location) - { - code = 301; - set_header("Location", location); - } - - void write(const std::string& body_part) - { - body += body_part; - } - - /// Set the response completion flag and call the handler (to send the response). - void end() - { - if (!completed_) - { - completed_ = true; - if (skip_body) - { - set_header("Content-Length", std::to_string(body.size())); - body = ""; - manual_length_header = true; - } - if (complete_request_handler_) - { - complete_request_handler_(); - } - } - } - - /// Same as end() except it adds a body part right before ending. - void end(const std::string& body_part) - { - body += body_part; - end(); - } - - /// Check if the connection is still alive (usually by checking the socket status). - bool is_alive() - { - return is_alive_helper_ && is_alive_helper_(); - } - - /// Check whether the response has a static file defined. - bool is_static_type() - { - return file_info.path.size(); - } - - /// This constains metadata (coming from the `stat` command) related to any static files associated with this response. - - /// - /// Either a static file or a string body can be returned as 1 response. - struct static_file_info - { - std::string path = ""; - struct stat statbuf; - int statResult; - }; - - /// Return a static file as the response body - void set_static_file_info(std::string path) - { - utility::sanitize_filename(path); - set_static_file_info_unsafe(path); - } - - /// Return a static file as the response body without sanitizing the path (use set_static_file_info instead) - void set_static_file_info_unsafe(std::string path) - { - file_info.path = path; - file_info.statResult = stat(file_info.path.c_str(), &file_info.statbuf); -#ifdef CROW_ENABLE_COMPRESSION - compressed = false; -#endif - if (file_info.statResult == 0) - { - std::size_t last_dot = path.find_last_of("."); - std::string extension = path.substr(last_dot + 1); - code = 200; - this->add_header("Content-Length", std::to_string(file_info.statbuf.st_size)); - - if (!extension.empty()) - { - const auto mimeType = mime_types.find(extension); - if (mimeType != mime_types.end()) - { - this->add_header("Content-Type", mimeType->second); - } - else - { - this->add_header("Content-Type", "text/plain"); - } - } - } - else - { - code = 404; - file_info.path.clear(); - this->end(); - } - } - - private: - bool completed_{}; - std::function complete_request_handler_; - std::function is_alive_helper_; - static_file_info file_info; - }; -} // namespace crow - - - -#pragma once - - - - - -namespace crow -{ - - struct UTF8 - { - struct context - {}; - - void before_handle(request& /*req*/, response& /*res*/, context& /*ctx*/) - {} - - void after_handle(request& /*req*/, response& res, context& /*ctx*/) - { - if (get_header_value(res.headers, "Content-Type").empty()) - { - res.set_header("Content-Type", "text/plain; charset=utf-8"); - } - } - }; - -} // namespace crow - - - -#pragma once -#include - - - - - -namespace crow -{ - // Any middleware requires following 3 members: - - // struct context; - // storing data for the middleware; can be read from another middleware or handlers - - // before_handle - // called before handling the request. - // if res.end() is called, the operation is halted. - // (still call after_handle of this middleware) - // 2 signatures: - // void before_handle(request& req, response& res, context& ctx) - // if you only need to access this middlewares context. - // template - // void before_handle(request& req, response& res, context& ctx, AllContext& all_ctx) - // you can access another middlewares' context by calling `all_ctx.template get()' - // ctx == all_ctx.template get() - - // after_handle - // called after handling the request. - // void after_handle(request& req, response& res, context& ctx) - // template - // void after_handle(request& req, response& res, context& ctx, AllContext& all_ctx) - - struct CookieParser - { - struct context - { - std::unordered_map jar; - std::unordered_map cookies_to_add; - - std::string get_cookie(const std::string& key) const - { - auto cookie = jar.find(key); - if (cookie != jar.end()) - return cookie->second; - return {}; - } - - void set_cookie(const std::string& key, const std::string& value) - { - cookies_to_add.emplace(key, value); - } - }; - - void before_handle(request& req, response& res, context& ctx) - { - int count = req.headers.count("Cookie"); - if (!count) - return; - if (count > 1) - { - res.code = 400; - res.end(); - return; - } - std::string cookies = req.get_header_value("Cookie"); - size_t pos = 0; - while (pos < cookies.size()) - { - size_t pos_equal = cookies.find('=', pos); - if (pos_equal == cookies.npos) - break; - std::string name = cookies.substr(pos, pos_equal - pos); - boost::trim(name); - pos = pos_equal + 1; - while (pos < cookies.size() && cookies[pos] == ' ') - pos++; - if (pos == cookies.size()) - break; - - size_t pos_semicolon = cookies.find(';', pos); - std::string value = cookies.substr(pos, pos_semicolon - pos); - - boost::trim(value); - if (value[0] == '"' && value[value.size() - 1] == '"') - { - value = value.substr(1, value.size() - 2); - } - - ctx.jar.emplace(std::move(name), std::move(value)); - - pos = pos_semicolon; - if (pos == cookies.npos) - break; - pos++; - while (pos < cookies.size() && cookies[pos] == ' ') - pos++; - } - } - - void after_handle(request& /*req*/, response& res, context& ctx) - { - for (auto& cookie : ctx.cookies_to_add) - { - if (cookie.second.empty()) - res.add_header("Set-Cookie", cookie.first + "=\"\""); - else - res.add_header("Set-Cookie", cookie.first + "=" + cookie.second); - } - } - }; - - /* - App app; - A B C - A::context - int aa; - - ctx1 : public A::context - ctx2 : public ctx1, public B::context - ctx3 : public ctx2, public C::context - - C depends on A - - C::handle - context.aaa - - App::context : private CookieParser::contetx, ... - { - jar - - } - - SimpleApp - */ -} // namespace crow - - - -#pragma once - - - - - - - - -#include -#include -#include -#include - -namespace crow -{ - - /// Local middleware should extend ILocalMiddleware - struct ILocalMiddleware - { - using call_global = std::false_type; - }; - - namespace detail - { - template - struct check_before_handle_arity_3_const - { - template - struct get - {}; - }; - - template - struct check_before_handle_arity_3 - { - template - struct get - {}; - }; - - template - struct check_after_handle_arity_3_const - { - template - struct get - {}; - }; - - template - struct check_after_handle_arity_3 - { - template - struct get - {}; - }; - - template - struct check_global_call_false - { - template::type = true> - struct get - {}; - }; - - template - struct is_before_handle_arity_3_impl - { - template - static std::true_type f(typename check_before_handle_arity_3_const::template get*); - - template - static std::true_type f(typename check_before_handle_arity_3::template get*); - - template - static std::false_type f(...); - - public: - static const bool value = decltype(f(nullptr))::value; - }; - - template - struct is_after_handle_arity_3_impl - { - template - static std::true_type f(typename check_after_handle_arity_3_const::template get*); - - template - static std::true_type f(typename check_after_handle_arity_3::template get*); - - template - static std::false_type f(...); - - public: - static constexpr bool value = decltype(f(nullptr))::value; - }; - - template - typename std::enable_if::value>::type - before_handler_call(MW& mw, request& req, response& res, Context& ctx, ParentContext& /*parent_ctx*/) - { - mw.before_handle(req, res, ctx.template get(), ctx); - } - - template - typename std::enable_if::value>::type - before_handler_call(MW& mw, request& req, response& res, Context& ctx, ParentContext& /*parent_ctx*/) - { - mw.before_handle(req, res, ctx.template get()); - } - - template - typename std::enable_if::value>::type - after_handler_call(MW& mw, request& req, response& res, Context& ctx, ParentContext& /*parent_ctx*/) - { - mw.after_handle(req, res, ctx.template get(), ctx); - } - - template - typename std::enable_if::value>::type - after_handler_call(MW& mw, request& req, response& res, Context& ctx, ParentContext& /*parent_ctx*/) - { - mw.after_handle(req, res, ctx.template get()); - } - - - template class CallCriteria, // Checks if QueryMW should be called in this context - int N, typename Context, typename Container> - typename std::enable_if<(N < std::tuple_size::type>::value), bool>::type - middleware_call_helper(Container& middlewares, request& req, response& res, Context& ctx) - { - - using CurrentMW = typename std::tuple_element::type>::type; - - if (!CallCriteria::value) - { - return middleware_call_helper(middlewares, req, res, ctx); - } - - using parent_context_t = typename Context::template partial; - before_handler_call(std::get(middlewares), req, res, ctx, static_cast(ctx)); - if (res.is_completed()) - { - after_handler_call(std::get(middlewares), req, res, ctx, static_cast(ctx)); - return true; - } - - if (middleware_call_helper(middlewares, req, res, ctx)) - { - after_handler_call(std::get(middlewares), req, res, ctx, static_cast(ctx)); - return true; - } - - return false; - } - - template class CallCriteria, int N, typename Context, typename Container> - typename std::enable_if<(N >= std::tuple_size::type>::value), bool>::type - middleware_call_helper(Container& /*middlewares*/, request& /*req*/, response& /*res*/, Context& /*ctx*/) - { - return false; - } - - template class CallCriteria, int N, typename Context, typename Container> - typename std::enable_if<(N < 0)>::type - after_handlers_call_helper(Container& /*middlewares*/, Context& /*context*/, request& /*req*/, response& /*res*/) - { - } - - template class CallCriteria, int N, typename Context, typename Container> - typename std::enable_if<(N == 0)>::type after_handlers_call_helper(Container& middlewares, Context& ctx, request& req, response& res) - { - using parent_context_t = typename Context::template partial; - using CurrentMW = typename std::tuple_element::type>::type; - if (CallCriteria::value) - { - after_handler_call(std::get(middlewares), req, res, ctx, static_cast(ctx)); - } - } - - template class CallCriteria, int N, typename Context, typename Container> - typename std::enable_if<(N > 0)>::type after_handlers_call_helper(Container& middlewares, Context& ctx, request& req, response& res) - { - using parent_context_t = typename Context::template partial; - using CurrentMW = typename std::tuple_element::type>::type; - if (CallCriteria::value) - { - after_handler_call(std::get(middlewares), req, res, ctx, static_cast(ctx)); - } - after_handlers_call_helper(middlewares, ctx, req, res); - } - - // A CallCriteria that accepts only global middleware - template - struct middleware_call_criteria_only_global - { - template - static std::false_type f(typename check_global_call_false::template get*); - - template - static std::true_type f(...); - - static const bool value = decltype(f(nullptr))::value; - }; - - template - typename std::enable_if>::value, void>::type - wrapped_handler_call(crow::request& /*req*/, crow::response& res, const F& f, Args&&... args) - { - static_assert(!std::is_same()...))>::value, - "Handler function cannot have void return type; valid return types: string, int, crow::response, crow::returnable"); - - res = crow::response(f(std::forward(args)...)); - res.end(); - } - - template - typename std::enable_if< - !black_magic::CallHelper>::value && - black_magic::CallHelper>::value, - void>::type - wrapped_handler_call(crow::request& req, crow::response& res, const F& f, Args&&... args) - { - static_assert(!std::is_same(), std::declval()...))>::value, - "Handler function cannot have void return type; valid return types: string, int, crow::response, crow::returnable"); - - res = crow::response(f(req, std::forward(args)...)); - res.end(); - } - - template - typename std::enable_if< - !black_magic::CallHelper>::value && - !black_magic::CallHelper>::value && - black_magic::CallHelper>::value, - void>::type - wrapped_handler_call(crow::request& /*req*/, crow::response& res, const F& f, Args&&... args) - { - static_assert(std::is_same(), std::declval()...))>::value, - "Handler function with response argument should have void return type"); - - f(res, std::forward(args)...); - } - - template - typename std::enable_if< - !black_magic::CallHelper>::value && - !black_magic::CallHelper>::value && - !black_magic::CallHelper>::value && - black_magic::CallHelper>::value, - void>::type - wrapped_handler_call(crow::request& req, crow::response& res, const F& f, Args&&... args) - { - static_assert(std::is_same(), std::declval(), std::declval()...))>::value, - "Handler function with response argument should have void return type"); - - f(req, res, std::forward(args)...); - } - - // wrapped_handler_call transparently wraps a handler call behind (req, res, args...) - template - typename std::enable_if< - !black_magic::CallHelper>::value && - !black_magic::CallHelper>::value && - !black_magic::CallHelper>::value && - !black_magic::CallHelper>::value, - void>::type - wrapped_handler_call(crow::request& req, crow::response& res, const F& f, Args&&... args) - { - static_assert(std::is_same(), std::declval(), std::declval()...))>::value, - "Handler function with response argument should have void return type"); - - f(req, res, std::forward(args)...); - } - - template - struct handler_middleware_wrapper - { - // CallCriteria bound to the current Middlewares pack - template - struct middleware_call_criteria - { - static constexpr bool value = black_magic::has_type>::value; - }; - - template - void operator()(crow::request& req, crow::response& res, Args&&... args) const - { - auto& ctx = *reinterpret_cast(req.middleware_context); - auto& container = *reinterpret_cast(req.middleware_container); - - auto glob_completion_handler = std::move(res.complete_request_handler_); - res.complete_request_handler_ = [] {}; - - middleware_call_helper(container, req, res, ctx); - - if (res.completed_) - { - glob_completion_handler(); - return; - } - - res.complete_request_handler_ = [&ctx, &container, &req, &res, &glob_completion_handler] { - after_handlers_call_helper< - middleware_call_criteria, - std::tuple_size::value - 1, - typename App::context_t, - typename App::mw_container_t>(container, ctx, req, res); - glob_completion_handler(); - }; - - wrapped_handler_call(req, res, f, std::forward(args)...); - } - - F f; - }; - - template - struct handler_call_bridge - { - template - using check_app_contains = typename black_magic::has_type; - - static_assert(black_magic::all_true<(std::is_base_of::value)...>::value, - "Local middleware has to inherit crow::ILocalMiddleware"); - - static_assert(black_magic::all_true<(check_app_contains::value)...>::value, - "Local middleware has to be listed in app middleware"); - - template - void operator()(F&& f) const - { - auto wrapped = handler_middleware_wrapper{std::forward(f)}; - tptr->operator()(std::move(wrapped)); - } - - Route* tptr; - }; - - } // namespace detail -} // namespace crow - - - -#pragma once -#include -#include - - - - - - - -namespace crow -{ - namespace websocket - { - enum class WebSocketReadState - { - MiniHeader, - Len16, - Len64, - Mask, - Payload, - }; - - /// A base class for websocket connection. - struct connection - { - virtual void send_binary(const std::string& msg) = 0; - virtual void send_text(const std::string& msg) = 0; - virtual void send_ping(const std::string& msg) = 0; - virtual void send_pong(const std::string& msg) = 0; - virtual void close(const std::string& msg = "quit") = 0; - virtual std::string get_remote_ip() = 0; - virtual ~connection() {} - - void userdata(void* u) { userdata_ = u; } - void* userdata() { return userdata_; } - - private: - void* userdata_; - }; - - // Modified version of the illustration in RFC6455 Section-5.2 - // - // - // 0 1 2 3 -byte - // 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 -bit - // +-+-+-+-+-------+-+-------------+-------------------------------+ - // |F|R|R|R| opcode|M| Payload len | Extended payload length | - // |I|S|S|S| (4) |A| (7) | (16/64) | - // |N|V|V|V| |S| | (if payload len==126/127) | - // | |1|2|3| |K| | | - // +-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - + - // | Extended payload length continued, if payload len == 127 | - // + - - - - - - - - - - - - - - - +-------------------------------+ - // | |Masking-key, if MASK set to 1 | - // +-------------------------------+-------------------------------+ - // | Masking-key (continued) | Payload Data | - // +-------------------------------- - - - - - - - - - - - - - - - + - // : Payload Data continued ... : - // + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + - // | Payload Data continued ... | - // +---------------------------------------------------------------+ - // - - /// A websocket connection. - template - class Connection : public connection - { - public: - /// Constructor for a connection. - - /// - /// Requires a request with an "Upgrade: websocket" header.
- /// Automatically handles the handshake. - Connection(const crow::request& req, Adaptor&& adaptor, - std::function open_handler, - std::function message_handler, - std::function close_handler, - std::function error_handler, - std::function accept_handler): - adaptor_(std::move(adaptor)), - open_handler_(std::move(open_handler)), message_handler_(std::move(message_handler)), close_handler_(std::move(close_handler)), error_handler_(std::move(error_handler)), accept_handler_(std::move(accept_handler)) - { - if (!boost::iequals(req.get_header_value("upgrade"), "websocket")) - { - adaptor.close(); - delete this; - return; - } - - if (accept_handler_) - { - if (!accept_handler_(req)) - { - adaptor.close(); - delete this; - return; - } - } - - // Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ== - // Sec-WebSocket-Version: 13 - std::string magic = req.get_header_value("Sec-WebSocket-Key") + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; - sha1::SHA1 s; - s.processBytes(magic.data(), magic.size()); - uint8_t digest[20]; - s.getDigestBytes(digest); - start(crow::utility::base64encode((unsigned char*)digest, 20)); - } - - /// Send data through the socket. - template - void dispatch(CompletionHandler handler) - { - adaptor_.get_io_service().dispatch(handler); - } - - /// Send data through the socket and return immediately. - template - void post(CompletionHandler handler) - { - adaptor_.get_io_service().post(handler); - } - - /// Send a "Ping" message. - - /// - /// Usually invoked to check if the other point is still online. - void send_ping(const std::string& msg) override - { - dispatch([this, msg] { - auto header = build_header(0x9, msg.size()); - write_buffers_.emplace_back(std::move(header)); - write_buffers_.emplace_back(msg); - do_write(); - }); - } - - /// Send a "Pong" message. - - /// - /// Usually automatically invoked as a response to a "Ping" message. - void send_pong(const std::string& msg) override - { - dispatch([this, msg] { - auto header = build_header(0xA, msg.size()); - write_buffers_.emplace_back(std::move(header)); - write_buffers_.emplace_back(msg); - do_write(); - }); - } - - /// Send a binary encoded message. - void send_binary(const std::string& msg) override - { - dispatch([this, msg] { - auto header = build_header(2, msg.size()); - write_buffers_.emplace_back(std::move(header)); - write_buffers_.emplace_back(msg); - do_write(); - }); - } - - /// Send a plaintext message. - void send_text(const std::string& msg) override - { - dispatch([this, msg] { - auto header = build_header(1, msg.size()); - write_buffers_.emplace_back(std::move(header)); - write_buffers_.emplace_back(msg); - do_write(); - }); - } - - /// Send a close signal. - - /// - /// Sets a flag to destroy the object once the message is sent. - void close(const std::string& msg) override - { - dispatch([this, msg] { - has_sent_close_ = true; - if (has_recv_close_ && !is_close_handler_called_) - { - is_close_handler_called_ = true; - if (close_handler_) - close_handler_(*this, msg); - } - auto header = build_header(0x8, msg.size()); - write_buffers_.emplace_back(std::move(header)); - write_buffers_.emplace_back(msg); - do_write(); - }); - } - - std::string get_remote_ip() override - { - return adaptor_.remote_endpoint().address().to_string(); - } - - protected: - /// Generate the websocket headers using an opcode and the message size (in bytes). - std::string build_header(int opcode, size_t size) - { - char buf[2 + 8] = "\x80\x00"; - buf[0] += opcode; - if (size < 126) - { - buf[1] += static_cast(size); - return {buf, buf + 2}; - } - else if (size < 0x10000) - { - buf[1] += 126; - *(uint16_t*)(buf + 2) = htons(static_cast(size)); - return {buf, buf + 4}; - } - else - { - buf[1] += 127; - *reinterpret_cast(buf + 2) = ((1 == htonl(1)) ? static_cast(size) : (static_cast(htonl((size)&0xFFFFFFFF)) << 32) | htonl(static_cast(size) >> 32)); - return {buf, buf + 10}; - } - } - - /// Send the HTTP upgrade response. - - /// - /// Finishes the handshake process, then starts reading messages from the socket. - void start(std::string&& hello) - { - static std::string header = "HTTP/1.1 101 Switching Protocols\r\n" - "Upgrade: websocket\r\n" - "Connection: Upgrade\r\n" - "Sec-WebSocket-Accept: "; - write_buffers_.emplace_back(header); - write_buffers_.emplace_back(std::move(hello)); - write_buffers_.emplace_back(crlf); - write_buffers_.emplace_back(crlf); - do_write(); - if (open_handler_) - open_handler_(*this); - do_read(); - } - - /// Read a websocket message. - - /// - /// Involves:
- /// Handling headers (opcodes, size).
- /// Unmasking the payload.
- /// Reading the actual payload.
- void do_read() - { - is_reading = true; - switch (state_) - { - case WebSocketReadState::MiniHeader: - { - mini_header_ = 0; - //boost::asio::async_read(adaptor_.socket(), boost::asio::buffer(&mini_header_, 1), - adaptor_.socket().async_read_some( - boost::asio::buffer(&mini_header_, 2), - [this](const boost::system::error_code& ec, std::size_t -#ifdef CROW_ENABLE_DEBUG - bytes_transferred -#endif - ) - - { - is_reading = false; - mini_header_ = ntohs(mini_header_); -#ifdef CROW_ENABLE_DEBUG - - if (!ec && bytes_transferred != 2) - { - throw std::runtime_error("WebSocket:MiniHeader:async_read fail:asio bug?"); - } -#endif - - if (!ec) - { - if ((mini_header_ & 0x80) == 0x80) - has_mask_ = true; - else //if the websocket specification is enforced and the message isn't masked, terminate the connection - { -#ifndef CROW_ENFORCE_WS_SPEC - has_mask_ = false; -#else - close_connection_ = true; - adaptor_.close(); - if (error_handler_) - error_handler_(*this); - check_destroy(); -#endif - } - - if ((mini_header_ & 0x7f) == 127) - { - state_ = WebSocketReadState::Len64; - } - else if ((mini_header_ & 0x7f) == 126) - { - state_ = WebSocketReadState::Len16; - } - else - { - remaining_length_ = mini_header_ & 0x7f; - state_ = WebSocketReadState::Mask; - } - do_read(); - } - else - { - close_connection_ = true; - adaptor_.close(); - if (error_handler_) - error_handler_(*this); - check_destroy(); - } - }); - } - break; - case WebSocketReadState::Len16: - { - remaining_length_ = 0; - remaining_length16_ = 0; - boost::asio::async_read( - adaptor_.socket(), boost::asio::buffer(&remaining_length16_, 2), - [this](const boost::system::error_code& ec, std::size_t -#ifdef CROW_ENABLE_DEBUG - bytes_transferred -#endif - ) { - is_reading = false; - remaining_length16_ = ntohs(remaining_length16_); - remaining_length_ = remaining_length16_; -#ifdef CROW_ENABLE_DEBUG - if (!ec && bytes_transferred != 2) - { - throw std::runtime_error("WebSocket:Len16:async_read fail:asio bug?"); - } -#endif - - if (!ec) - { - state_ = WebSocketReadState::Mask; - do_read(); - } - else - { - close_connection_ = true; - adaptor_.close(); - if (error_handler_) - error_handler_(*this); - check_destroy(); - } - }); - } - break; - case WebSocketReadState::Len64: - { - boost::asio::async_read( - adaptor_.socket(), boost::asio::buffer(&remaining_length_, 8), - [this](const boost::system::error_code& ec, std::size_t -#ifdef CROW_ENABLE_DEBUG - bytes_transferred -#endif - ) { - is_reading = false; - remaining_length_ = ((1 == ntohl(1)) ? (remaining_length_) : (static_cast(ntohl((remaining_length_)&0xFFFFFFFF)) << 32) | ntohl((remaining_length_) >> 32)); -#ifdef CROW_ENABLE_DEBUG - if (!ec && bytes_transferred != 8) - { - throw std::runtime_error("WebSocket:Len16:async_read fail:asio bug?"); - } -#endif - - if (!ec) - { - state_ = WebSocketReadState::Mask; - do_read(); - } - else - { - close_connection_ = true; - adaptor_.close(); - if (error_handler_) - error_handler_(*this); - check_destroy(); - } - }); - } - break; - case WebSocketReadState::Mask: - if (has_mask_) - { - boost::asio::async_read( - adaptor_.socket(), boost::asio::buffer((char*)&mask_, 4), - [this](const boost::system::error_code& ec, std::size_t -#ifdef CROW_ENABLE_DEBUG - bytes_transferred -#endif - ) { - is_reading = false; -#ifdef CROW_ENABLE_DEBUG - if (!ec && bytes_transferred != 4) - { - throw std::runtime_error("WebSocket:Mask:async_read fail:asio bug?"); - } -#endif - - if (!ec) - { - state_ = WebSocketReadState::Payload; - do_read(); - } - else - { - close_connection_ = true; - if (error_handler_) - error_handler_(*this); - adaptor_.close(); - } - }); - } - else - { - state_ = WebSocketReadState::Payload; - do_read(); - } - break; - case WebSocketReadState::Payload: - { - auto to_read = static_cast(buffer_.size()); - if (remaining_length_ < to_read) - to_read = remaining_length_; - adaptor_.socket().async_read_some( - boost::asio::buffer(buffer_, static_cast(to_read)), - [this](const boost::system::error_code& ec, std::size_t bytes_transferred) { - is_reading = false; - - if (!ec) - { - fragment_.insert(fragment_.end(), buffer_.begin(), buffer_.begin() + bytes_transferred); - remaining_length_ -= bytes_transferred; - if (remaining_length_ == 0) - { - handle_fragment(); - state_ = WebSocketReadState::MiniHeader; - do_read(); - } - else - do_read(); - } - else - { - close_connection_ = true; - if (error_handler_) - error_handler_(*this); - adaptor_.close(); - } - }); - } - break; - } - } - - /// Check if the FIN bit is set. - bool is_FIN() - { - return mini_header_ & 0x8000; - } - - /// Extract the opcode from the header. - int opcode() - { - return (mini_header_ & 0x0f00) >> 8; - } - - /// Process the payload fragment. - - /// - /// Unmasks the fragment, checks the opcode, merges fragments into 1 message body, and calls the appropriate handler. - void handle_fragment() - { - if (has_mask_) - { - for (decltype(fragment_.length()) i = 0; i < fragment_.length(); i++) - { - fragment_[i] ^= ((char*)&mask_)[i % 4]; - } - } - switch (opcode()) - { - case 0: // Continuation - { - message_ += fragment_; - if (is_FIN()) - { - if (message_handler_) - message_handler_(*this, message_, is_binary_); - message_.clear(); - } - } - break; - case 1: // Text - { - is_binary_ = false; - message_ += fragment_; - if (is_FIN()) - { - if (message_handler_) - message_handler_(*this, message_, is_binary_); - message_.clear(); - } - } - break; - case 2: // Binary - { - is_binary_ = true; - message_ += fragment_; - if (is_FIN()) - { - if (message_handler_) - message_handler_(*this, message_, is_binary_); - message_.clear(); - } - } - break; - case 0x8: // Close - { - has_recv_close_ = true; - if (!has_sent_close_) - { - close(fragment_); - } - else - { - adaptor_.close(); - close_connection_ = true; - if (!is_close_handler_called_) - { - if (close_handler_) - close_handler_(*this, fragment_); - is_close_handler_called_ = true; - } - check_destroy(); - } - } - break; - case 0x9: // Ping - { - send_pong(fragment_); - } - break; - case 0xA: // Pong - { - pong_received_ = true; - } - break; - } - - fragment_.clear(); - } - - /// Send the buffers' data through the socket. - - /// - /// Also destroyes the object if the Close flag is set. - void do_write() - { - if (sending_buffers_.empty()) - { - sending_buffers_.swap(write_buffers_); - std::vector buffers; - buffers.reserve(sending_buffers_.size()); - for (auto& s : sending_buffers_) - { - buffers.emplace_back(boost::asio::buffer(s)); - } - boost::asio::async_write( - adaptor_.socket(), buffers, - [&](const boost::system::error_code& ec, std::size_t /*bytes_transferred*/) { - sending_buffers_.clear(); - if (!ec && !close_connection_) - { - if (!write_buffers_.empty()) - do_write(); - if (has_sent_close_) - close_connection_ = true; - } - else - { - close_connection_ = true; - check_destroy(); - } - }); - } - } - - /// Destroy the Connection. - void check_destroy() - { - //if (has_sent_close_ && has_recv_close_) - if (!is_close_handler_called_) - if (close_handler_) - close_handler_(*this, "uncleanly"); - if (sending_buffers_.empty() && !is_reading) - delete this; - } - - private: - Adaptor adaptor_; - - std::vector sending_buffers_; - std::vector write_buffers_; - - boost::array buffer_; - bool is_binary_; - std::string message_; - std::string fragment_; - WebSocketReadState state_{WebSocketReadState::MiniHeader}; - uint16_t remaining_length16_{0}; - uint64_t remaining_length_{0}; - bool close_connection_{false}; - bool is_reading{false}; - bool has_mask_{false}; - uint32_t mask_; - uint16_t mini_header_; - bool has_sent_close_{false}; - bool has_recv_close_{false}; - bool error_occured_{false}; - bool pong_received_{false}; - bool is_close_handler_called_{false}; - - std::function open_handler_; - std::function message_handler_; - std::function close_handler_; - std::function error_handler_; - std::function accept_handler_; - }; - } // namespace websocket -} // namespace crow - - - -/* merged revision: 5b951d74bd66ec9d38448e0a85b1cf8b85d97db3 */ -/* updated to : e13b274770da9b82a1085dec29182acfea72e7a7 (beyond v2.9.5) */ -/* commits not included: - * 091ebb87783a58b249062540bbea07de2a11e9cf - * 6132d1fefa03f769a3979355d1f5da0b8889cad2 - * 7ba312397c2a6c851a4b5efe6c1603b1e1bda6ff - * d7675453a6c03180572f084e95eea0d02df39164 - * dff604db203986e532e5a679bafd0e7382c6bdd9 (Might be useful to actually add [upgrade requests with a body]) - * e01811e7f4894d7f0f7f4bd8492cccec6f6b4038 (related to above) - * 05525c5fde1fc562481f6ae08fa7056185325daf (also related to above) - * 350258965909f249f9c59823aac240313e0d0120 (cannot be implemented due to upgrade) - */ - -// clang-format off -#pragma once - - -namespace crow -{ -extern "C" { - -#include -#if defined(_WIN32) && !defined(__MINGW32__) && \ - (!defined(_MSC_VER) || _MSC_VER<1600) && !defined(__WINE__) -#include -typedef __int8 int8_t; -typedef unsigned __int8 uint8_t; -typedef __int16 int16_t; -typedef unsigned __int16 uint16_t; -typedef __int32 int32_t; -typedef unsigned __int32 uint32_t; -typedef __int64 int64_t; -typedef unsigned __int64 uint64_t; -#elif (defined(__sun) || defined(__sun__)) && defined(__SunOS_5_9) -#include -#else -#include -#endif - - - -/* Maximium header size allowed. If the macro is not defined - * before including this header then the default is used. To - * change the maximum header size, define the macro in the build - * environment (e.g. -DHTTP_MAX_HEADER_SIZE=). To remove - * the effective limit on the size of the header, define the macro - * to a very large number (e.g. -DCROW_HTTP_MAX_HEADER_SIZE=0x7fffffff) - */ -#ifndef CROW_HTTP_MAX_HEADER_SIZE -# define CROW_HTTP_MAX_HEADER_SIZE (80*1024) -#endif - -typedef struct http_parser http_parser; -typedef struct http_parser_settings http_parser_settings; - -/* Callbacks should return non-zero to indicate an error. The parser will - * then halt execution. - * - * The one exception is on_headers_complete. In a HTTP_RESPONSE parser - * returning '1' from on_headers_complete will tell the parser that it - * should not expect a body. This is used when receiving a response to a - * HEAD request which may contain 'Content-Length' or 'Transfer-Encoding: - * chunked' headers that indicate the presence of a body. - * - * Returning `2` from on_headers_complete will tell parser that it should not - * expect neither a body nor any futher responses on this connection. This is - * useful for handling responses to a CONNECT request which may not contain - * `Upgrade` or `Connection: upgrade` headers. - * - * http_data_cb does not return data chunks. It will be called arbitrarally - * many times for each string. E.G. you might get 10 callbacks for "on_url" - * each providing just a few characters more data. - */ -typedef int (*http_data_cb) (http_parser*, const char *at, size_t length); -typedef int (*http_cb) (http_parser*); - - -/* Flag values for http_parser.flags field */ -enum http_connection_flags // This is basically 7 booleans placed into 1 integer. Uses 4 bytes instead of n bytes (7 currently). - { F_CHUNKED = 1 << 0 // 00000000 00000000 00000000 00000001 - , F_CONNECTION_KEEP_ALIVE = 1 << 1 // 00000000 00000000 00000000 00000010 - , F_CONNECTION_CLOSE = 1 << 2 // 00000000 00000000 00000000 00000100 - , F_TRAILING = 1 << 3 // 00000000 00000000 00000000 00001000 - , F_UPGRADE = 1 << 4 // 00000000 00000000 00000000 00010000 - , F_SKIPBODY = 1 << 5 // 00000000 00000000 00000000 00100000 - , F_CONTENTLENGTH = 1 << 6 // 00000000 00000000 00000000 01000000 - }; - - -/* Map for errno-related constants - * - * The provided argument should be a macro that takes 2 arguments. - */ -#define CROW_HTTP_ERRNO_MAP(CROW_XX) \ - /* No error */ \ - CROW_XX(OK, "success") \ - \ - /* Callback-related errors */ \ - CROW_XX(CB_message_begin, "the on_message_begin callback failed") \ - CROW_XX(CB_url, "the \"on_url\" callback failed") \ - CROW_XX(CB_header_field, "the \"on_header_field\" callback failed") \ - CROW_XX(CB_header_value, "the \"on_header_value\" callback failed") \ - CROW_XX(CB_headers_complete, "the \"on_headers_complete\" callback failed") \ - CROW_XX(CB_body, "the \"on_body\" callback failed") \ - CROW_XX(CB_message_complete, "the \"on_message_complete\" callback failed") \ - CROW_XX(CB_status, "the \"on_status\" callback failed") \ - \ - /* Parsing-related errors */ \ - CROW_XX(INVALID_EOF_STATE, "stream ended at an unexpected time") \ - CROW_XX(HEADER_OVERFLOW, "too many header bytes seen; overflow detected") \ - CROW_XX(CLOSED_CONNECTION, "data received after completed connection: close message") \ - CROW_XX(INVALID_VERSION, "invalid HTTP version") \ - CROW_XX(INVALID_STATUS, "invalid HTTP status code") \ - CROW_XX(INVALID_METHOD, "invalid HTTP method") \ - CROW_XX(INVALID_URL, "invalid URL") \ - CROW_XX(INVALID_HOST, "invalid host") \ - CROW_XX(INVALID_PORT, "invalid port") \ - CROW_XX(INVALID_PATH, "invalid path") \ - CROW_XX(INVALID_QUERY_STRING, "invalid query string") \ - CROW_XX(INVALID_FRAGMENT, "invalid fragment") \ - CROW_XX(LF_EXPECTED, "LF character expected") \ - CROW_XX(INVALID_HEADER_TOKEN, "invalid character in header") \ - CROW_XX(INVALID_CONTENT_LENGTH, "invalid character in content-length header") \ - CROW_XX(UNEXPECTED_CONTENT_LENGTH, "unexpected content-length header") \ - CROW_XX(INVALID_CHUNK_SIZE, "invalid character in chunk size header") \ - CROW_XX(INVALID_CONSTANT, "invalid constant string") \ - CROW_XX(INVALID_INTERNAL_STATE, "encountered unexpected internal state") \ - CROW_XX(STRICT, "strict mode assertion failed") \ - CROW_XX(UNKNOWN, "an unknown error occurred") \ - CROW_XX(INVALID_TRANSFER_ENCODING, "request has invalid transfer-encoding") \ - - -/* Define CHPE_* values for each errno value above */ -#define CROW_HTTP_ERRNO_GEN(n, s) CHPE_##n, -enum http_errno { - CROW_HTTP_ERRNO_MAP(CROW_HTTP_ERRNO_GEN) -}; -#undef CROW_HTTP_ERRNO_GEN - - -/* Get an http_errno value from an http_parser */ -#define CROW_HTTP_PARSER_ERRNO(p) ((enum http_errno)(p)->http_errno) - - - struct http_parser - { - /** PRIVATE **/ - unsigned int flags : 7; /* F_* values from 'flags' enum; semi-public */ - unsigned int state : 8; /* enum state from http_parser.c */ - unsigned int header_state : 7; /* enum header_state from http_parser.c */ - unsigned int index : 5; /* index into current matcher */ - unsigned int uses_transfer_encoding : 1; /* Transfer-Encoding header is present */ - unsigned int allow_chunked_length : 1; /* Allow headers with both `Content-Length` and `Transfer-Encoding: chunked` set */ - unsigned int lenient_http_headers : 1; - - uint32_t nread; /* # bytes read in various scenarios */ - uint64_t content_length; /* # bytes in body. `(uint64_t) -1` (all bits one) if no Content-Length header. */ - unsigned long qs_point; - - /** READ-ONLY **/ - unsigned char http_major; - unsigned char http_minor; - unsigned int method : 8; /* requests only */ - unsigned int http_errno : 7; - - /* 1 = Upgrade header was present and the parser has exited because of that. - * 0 = No upgrade header present. - * Should be checked when http_parser_execute() returns in addition to - * error checking. - */ - unsigned int upgrade : 1; - - /** PUBLIC **/ - void* data; /* A pointer to get hook to the "connection" or "socket" object */ - }; - - - struct http_parser_settings - { - http_cb on_message_begin; - http_data_cb on_url; - http_data_cb on_header_field; - http_data_cb on_header_value; - http_cb on_headers_complete; - http_data_cb on_body; - http_cb on_message_complete; - }; - - - -// SOURCE (.c) CODE -#include -#include -#include -#include -#include - -static uint32_t max_header_size = CROW_HTTP_MAX_HEADER_SIZE; - -#ifndef CROW_ULLONG_MAX -# define CROW_ULLONG_MAX ((uint64_t) -1) /* 2^64-1 */ -#endif - -#ifndef CROW_MIN -# define CROW_MIN(a,b) ((a) < (b) ? (a) : (b)) -#endif - -#ifndef CROW_ARRAY_SIZE -# define CROW_ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) -#endif - -#ifndef CROW_BIT_AT -# define CROW_BIT_AT(a, i) \ - (!!((unsigned int) (a)[(unsigned int) (i) >> 3] & \ - (1 << ((unsigned int) (i) & 7)))) -#endif - -#define CROW_SET_ERRNO(e) \ -do { \ - parser->nread = nread; \ - parser->http_errno = (e); \ -} while(0) - -/* Run the notify callback FOR, returning ER if it fails */ -#define CROW_CALLBACK_NOTIFY_(FOR, ER) \ -do { \ - assert(CROW_HTTP_PARSER_ERRNO(parser) == CHPE_OK); \ - \ - if (CROW_LIKELY(settings->on_##FOR)) { \ - if (CROW_UNLIKELY(0 != settings->on_##FOR(parser))) { \ - CROW_SET_ERRNO(CHPE_CB_##FOR); \ - } \ - \ - /* We either errored above or got paused; get out */ \ - if (CROW_UNLIKELY(CROW_HTTP_PARSER_ERRNO(parser) != CHPE_OK)) { \ - return (ER); \ - } \ - } \ -} while (0) - -/* Run the notify callback FOR and consume the current byte */ -#define CROW_CALLBACK_NOTIFY(FOR) CROW_CALLBACK_NOTIFY_(FOR, p - data + 1) - -/* Run the notify callback FOR and don't consume the current byte */ -#define CROW_CALLBACK_NOTIFY_NOADVANCE(FOR) CROW_CALLBACK_NOTIFY_(FOR, p - data) - -/* Run data callback FOR with LEN bytes, returning ER if it fails */ -#define CROW_CALLBACK_DATA_(FOR, LEN, ER) \ -do { \ - assert(CROW_HTTP_PARSER_ERRNO(parser) == CHPE_OK); \ - \ - if (FOR##_mark) { \ - if (CROW_LIKELY(settings->on_##FOR)) { \ - if (CROW_UNLIKELY(0 != \ - settings->on_##FOR(parser, FOR##_mark, (LEN)))) { \ - CROW_SET_ERRNO(CHPE_CB_##FOR); \ - } \ - \ - /* We either errored above or got paused; get out */ \ - if (CROW_UNLIKELY(CROW_HTTP_PARSER_ERRNO(parser) != CHPE_OK)) {\ - return (ER); \ - } \ - } \ - FOR##_mark = NULL; \ - } \ -} while (0) - -/* Run the data callback FOR and consume the current byte */ -#define CROW_CALLBACK_DATA(FOR) \ - CROW_CALLBACK_DATA_(FOR, p - FOR##_mark, p - data + 1) - -/* Run the data callback FOR and don't consume the current byte */ -#define CROW_CALLBACK_DATA_NOADVANCE(FOR) \ - CROW_CALLBACK_DATA_(FOR, p - FOR##_mark, p - data) - -/* Set the mark FOR; non-destructive if mark is already set */ -#define CROW_MARK(FOR) \ -do { \ - if (!FOR##_mark) { \ - FOR##_mark = p; \ - } \ -} while (0) - -/* Don't allow the total size of the HTTP headers (including the status - * line) to exceed max_header_size. This check is here to protect - * embedders against denial-of-service attacks where the attacker feeds - * us a never-ending header that the embedder keeps buffering. - * - * This check is arguably the responsibility of embedders but we're doing - * it on the embedder's behalf because most won't bother and this way we - * make the web a little safer. max_header_size is still far bigger - * than any reasonable request or response so this should never affect - * day-to-day operation. - */ -#define CROW_COUNT_HEADER_SIZE(V) \ -do { \ - nread += (uint32_t)(V); \ - if (CROW_UNLIKELY(nread > max_header_size)) { \ - CROW_SET_ERRNO(CHPE_HEADER_OVERFLOW); \ - goto error; \ - } \ -} while (0) -#define CROW_REEXECUTE() \ - goto reexecute; \ - -#define CROW_PROXY_CONNECTION "proxy-connection" -#define CROW_CONNECTION "connection" -#define CROW_CONTENT_LENGTH "content-length" -#define CROW_TRANSFER_ENCODING "transfer-encoding" -#define CROW_UPGRADE "upgrade" -#define CROW_CHUNKED "chunked" -#define CROW_KEEP_ALIVE "keep-alive" -#define CROW_CLOSE "close" - - - - enum state - { - s_dead = 1 /* important that this is > 0 */ - - , - s_start_req - - , - s_req_method, - s_req_spaces_before_url, - s_req_schema, - s_req_schema_slash, - s_req_schema_slash_slash, - s_req_server_start, - s_req_server, // } - s_req_server_with_at, // | - s_req_path, // | The parser recognizes how to switch between these states, - s_req_query_string_start, // | however it doesn't process them any differently. - s_req_query_string, // } - s_req_http_start, - s_req_http_H, - s_req_http_HT, - s_req_http_HTT, - s_req_http_HTTP, - s_req_http_I, - s_req_http_IC, - s_req_http_major, - s_req_http_dot, - s_req_http_minor, - s_req_http_end, - s_req_line_almost_done - - , - s_header_field_start, - s_header_field, - s_header_value_discard_ws, - s_header_value_discard_ws_almost_done, - s_header_value_discard_lws, - s_header_value_start, - s_header_value, - s_header_value_lws - - , - s_header_almost_done - - , - s_chunk_size_start, - s_chunk_size, - s_chunk_parameters, - s_chunk_size_almost_done - - , - s_headers_almost_done, - s_headers_done - - /* Important: 's_headers_done' must be the last 'header' state. All - * states beyond this must be 'body' states. It is used for overflow - * checking. See the CROW_PARSING_HEADER() macro. - */ - - , - s_chunk_data, - s_chunk_data_almost_done, - s_chunk_data_done - - , - s_body_identity, - s_body_identity_eof - - , - s_message_done - }; - - -#define CROW_PARSING_HEADER(state) (state <= s_headers_done) - - -enum header_states - { h_general = 0 - , h_C - , h_CO - , h_CON - - , h_matching_connection - , h_matching_proxy_connection - , h_matching_content_length - , h_matching_transfer_encoding - , h_matching_upgrade - - , h_connection - , h_content_length - , h_content_length_num - , h_content_length_ws - , h_transfer_encoding - , h_upgrade - - , h_matching_transfer_encoding_token_start - , h_matching_transfer_encoding_chunked - , h_matching_transfer_encoding_token - - , h_matching_connection_keep_alive - , h_matching_connection_close - - , h_transfer_encoding_chunked - , h_connection_keep_alive - , h_connection_close - }; - -enum http_host_state - { - s_http_host_dead = 1 - , s_http_userinfo_start - , s_http_userinfo - , s_http_host_start - , s_http_host_v6_start - , s_http_host - , s_http_host_v6 - , s_http_host_v6_end - , s_http_host_v6_zone_start - , s_http_host_v6_zone - , s_http_host_port_start - , s_http_host_port -}; - -/* Macros for character classes; depends on strict-mode */ -#define CROW_LOWER(c) (unsigned char)(c | 0x20) -#define CROW_IS_ALPHA(c) (CROW_LOWER(c) >= 'a' && CROW_LOWER(c) <= 'z') -#define CROW_IS_NUM(c) ((c) >= '0' && (c) <= '9') -#define CROW_IS_ALPHANUM(c) (CROW_IS_ALPHA(c) || CROW_IS_NUM(c)) -//#define CROW_IS_HEX(c) (CROW_IS_NUM(c) || (CROW_LOWER(c) >= 'a' && CROW_LOWER(c) <= 'f')) -#define CROW_IS_MARK(c) ((c) == '-' || (c) == '_' || (c) == '.' || \ - (c) == '!' || (c) == '~' || (c) == '*' || (c) == '\'' || (c) == '(' || \ - (c) == ')') -#define CROW_IS_USERINFO_CHAR(c) (CROW_IS_ALPHANUM(c) || CROW_IS_MARK(c) || (c) == '%' || \ - (c) == ';' || (c) == ':' || (c) == '&' || (c) == '=' || (c) == '+' || \ - (c) == '$' || (c) == ',') - -#define CROW_TOKEN(c) (tokens[(unsigned char)c]) -#define CROW_IS_URL_CHAR(c) (CROW_BIT_AT(normal_url_char, (unsigned char)c)) -//#define CROW_IS_HOST_CHAR(c) (CROW_IS_ALPHANUM(c) || (c) == '.' || (c) == '-') - - /** - * Verify that a char is a valid visible (printable) US-ASCII - * character or %x80-FF - **/ -#define CROW_IS_HEADER_CHAR(ch) \ - (ch == cr || ch == lf || ch == 9 || ((unsigned char)ch > 31 && ch != 127)) - -#define CROW_start_state s_start_req - -# define CROW_STRICT_CHECK(cond) \ -do { \ - if (cond) { \ - CROW_SET_ERRNO(CHPE_STRICT); \ - goto error; \ - } \ -} while (0) -#define CROW_NEW_MESSAGE() (CROW_start_state) - -/* Our URL parser. - * - * This is designed to be shared by http_parser_execute() for URL validation, - * hence it has a state transition + byte-for-byte interface. In addition, it - * is meant to be embedded in http_parser_parse_url(), which does the dirty - * work of turning state transitions URL components for its API. - * - * This function should only be invoked with non-space characters. It is - * assumed that the caller cares about (and can detect) the transition between - * URL and non-URL states by looking for these. - */ -inline enum state -parse_url_char(enum state s, const char ch, http_parser *parser, const char* url_mark, const char* p) -{ -# define CROW_T(v) 0 - - -static const uint8_t normal_url_char[32] = { -/* 0 nul 1 soh 2 stx 3 etx 4 eot 5 enq 6 ack 7 bel */ - 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0, -/* 8 bs 9 ht 10 nl 11 vt 12 np 13 cr 14 so 15 si */ - 0 |CROW_T(2)| 0 | 0 |CROW_T(16)| 0 | 0 | 0, -/* 16 dle 17 dc1 18 dc2 19 dc3 20 dc4 21 nak 22 syn 23 etb */ - 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0, -/* 24 can 25 em 26 sub 27 esc 28 fs 29 gs 30 rs 31 us */ - 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0, -/* 32 sp 33 ! 34 " 35 # 36 $ 37 % 38 & 39 ' */ - 0 | 2 | 4 | 0 | 16 | 32 | 64 | 128, -/* 40 ( 41 ) 42 * 43 + 44 , 45 - 46 . 47 / */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 48 0 49 1 50 2 51 3 52 4 53 5 54 6 55 7 */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 56 8 57 9 58 : 59 ; 60 < 61 = 62 > 63 ? */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 0, -/* 64 @ 65 A 66 B 67 C 68 D 69 E 70 F 71 G */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 72 H 73 I 74 J 75 K 76 L 77 M 78 N 79 O */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 80 P 81 Q 82 R 83 S 84 CROW_T 85 U 86 V 87 W */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 88 X 89 Y 90 Z 91 [ 92 \ 93 ] 94 ^ 95 _ */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 96 ` 97 a 98 b 99 c 100 d 101 e 102 f 103 g */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 104 h 105 i 106 j 107 k 108 l 109 m 110 n 111 o */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 112 p 113 q 114 r 115 s 116 t 117 u 118 v 119 w */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, -/* 120 x 121 y 122 z 123 { 124 | 125 } 126 ~ 127 del */ - 1 | 2 | 4 | 8 | 16 | 32 | 64 | 0, }; - -#undef CROW_T - - if (ch == ' ' || ch == '\r' || ch == '\n') { - return s_dead; - } - if (ch == '\t' || ch == '\f') { - return s_dead; - } - - switch (s) { - case s_req_spaces_before_url: - /* Proxied requests are followed by scheme of an absolute URI (alpha). - * All methods except CONNECT are followed by '/' or '*'. - */ - - if (ch == '/' || ch == '*') { - return s_req_path; - } - - if (CROW_IS_ALPHA(ch)) { - return s_req_schema; - } - - break; - - case s_req_schema: - if (CROW_IS_ALPHA(ch)) { - return s; - } - - if (ch == ':') { - return s_req_schema_slash; - } - - break; - - case s_req_schema_slash: - if (ch == '/') { - return s_req_schema_slash_slash; - } - - break; - - case s_req_schema_slash_slash: - if (ch == '/') { - return s_req_server_start; - } - - break; - - case s_req_server_with_at: - if (ch == '@') { - return s_dead; - } - - /* fall through */ - case s_req_server_start: - case s_req_server: - if (ch == '/') { - return s_req_path; - } - - if (ch == '?') { - parser->qs_point = p - url_mark; - return s_req_query_string_start; - } - - if (ch == '@') { - return s_req_server_with_at; - } - - if (CROW_IS_USERINFO_CHAR(ch) || ch == '[' || ch == ']') { - return s_req_server; - } - - break; - - case s_req_path: - if (CROW_IS_URL_CHAR(ch)) { - return s; - } - else if (ch == '?') - { - parser->qs_point = p - url_mark; - return s_req_query_string_start; - } - - break; - - case s_req_query_string_start: - case s_req_query_string: - if (CROW_IS_URL_CHAR(ch)) { - return s_req_query_string; - } - else if (ch == '?') - { - return s_req_query_string; - } - - break; - - default: - break; - } - - /* We should never fall out of the switch above unless there's an error */ - return s_dead; -} - -inline size_t http_parser_execute (http_parser *parser, - const http_parser_settings *settings, - const char *data, - size_t len) -{ - -/* Tokens as defined by rfc 2616. Also lowercases them. - * token = 1* - * separators = "(" | ")" | "<" | ">" | "@" - * | "," | ";" | ":" | "\" | <"> - * | "/" | "[" | "]" | "?" | "=" - * | "{" | "}" | SP | HT - */ -static const char tokens[256] = { -/* 0 nul 1 soh 2 stx 3 etx 4 eot 5 enq 6 ack 7 bel */ - 0, 0, 0, 0, 0, 0, 0, 0, -/* 8 bs 9 ht 10 nl 11 vt 12 np 13 cr 14 so 15 si */ - 0, 0, 0, 0, 0, 0, 0, 0, -/* 16 dle 17 dc1 18 dc2 19 dc3 20 dc4 21 nak 22 syn 23 etb */ - 0, 0, 0, 0, 0, 0, 0, 0, -/* 24 can 25 em 26 sub 27 esc 28 fs 29 gs 30 rs 31 us */ - 0, 0, 0, 0, 0, 0, 0, 0, -/* 32 sp 33 ! 34 " 35 # 36 $ 37 % 38 & 39 ' */ - 0, '!', 0, '#', '$', '%', '&', '\'', -/* 40 ( 41 ) 42 * 43 + 44 , 45 - 46 . 47 / */ - 0, 0, '*', '+', 0, '-', '.', 0, -/* 48 0 49 1 50 2 51 3 52 4 53 5 54 6 55 7 */ - '0', '1', '2', '3', '4', '5', '6', '7', -/* 56 8 57 9 58 : 59 ; 60 < 61 = 62 > 63 ? */ - '8', '9', 0, 0, 0, 0, 0, 0, -/* 64 @ 65 A 66 B 67 C 68 D 69 E 70 F 71 G */ - 0, 'a', 'b', 'c', 'd', 'e', 'f', 'g', -/* 72 H 73 I 74 J 75 K 76 L 77 M 78 N 79 O */ - 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', -/* 80 P 81 Q 82 R 83 S 84 T 85 U 86 V 87 W */ - 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', -/* 88 X 89 Y 90 Z 91 [ 92 \ 93 ] 94 ^ 95 _ */ - 'x', 'y', 'z', 0, 0, 0, '^', '_', -/* 96 ` 97 a 98 b 99 c 100 d 101 e 102 f 103 g */ - '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', -/* 104 h 105 i 106 j 107 k 108 l 109 m 110 n 111 o */ - 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', -/* 112 p 113 q 114 r 115 s 116 t 117 u 118 v 119 w */ - 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', -/* 120 x 121 y 122 z 123 { 124 | 125 } 126 ~ 127 del */ - 'x', 'y', 'z', 0, '|', 0, '~', 0 }; - - -static const int8_t unhex[256] = - {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 - ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 - ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 - , 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1,-1,-1,-1,-1 - ,-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1 - ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 - ,-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1 - ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 - }; - - - - char c, ch; - int8_t unhex_val; - const char *p = data; - const char *header_field_mark = 0; - const char *header_value_mark = 0; - const char *url_mark = 0; - const char *url_start_mark = 0; - const char *body_mark = 0; - const unsigned int lenient = parser->lenient_http_headers; - const unsigned int allow_chunked_length = parser->allow_chunked_length; - - uint32_t nread = parser->nread; - - /* We're in an error state. Don't bother doing anything. */ - if (CROW_HTTP_PARSER_ERRNO(parser) != CHPE_OK) { - return 0; - } - - if (len == 0) { - switch (parser->state) { - case s_body_identity_eof: - /* Use of CROW_CALLBACK_NOTIFY() here would erroneously return 1 byte read if we got paused. */ - CROW_CALLBACK_NOTIFY_NOADVANCE(message_complete); - return 0; - - case s_dead: - case s_start_req: - return 0; - - default: - CROW_SET_ERRNO(CHPE_INVALID_EOF_STATE); - return 1; - } - } - - - if (parser->state == s_header_field) - header_field_mark = data; - if (parser->state == s_header_value) - header_value_mark = data; - switch (parser->state) { - case s_req_path: - case s_req_schema: - case s_req_schema_slash: - case s_req_schema_slash_slash: - case s_req_server_start: - case s_req_server: - case s_req_server_with_at: - case s_req_query_string_start: - case s_req_query_string: - url_mark = data; - break; - default: - break; - } - - for (p=data; p != data + len; p++) { - ch = *p; - - if (CROW_PARSING_HEADER(parser->state)) - CROW_COUNT_HEADER_SIZE(1); - -reexecute: - switch (parser->state) { - - case s_dead: - /* this state is used after a 'Connection: close' message - * the parser will error out if it reads another message - */ - if (CROW_LIKELY(ch == cr || ch == lf)) - break; - - CROW_SET_ERRNO(CHPE_CLOSED_CONNECTION); - goto error; - - case s_start_req: - { - if (ch == cr || ch == lf) - break; - parser->flags = 0; - parser->uses_transfer_encoding = 0; - parser->content_length = CROW_ULLONG_MAX; - - if (CROW_UNLIKELY(!CROW_IS_ALPHA(ch))) { - CROW_SET_ERRNO(CHPE_INVALID_METHOD); - goto error; - } - - parser->method = 0; - parser->index = 1; - switch (ch) { - case 'A': parser->method = (unsigned)HTTPMethod::Acl; break; - case 'B': parser->method = (unsigned)HTTPMethod::Bind; break; - case 'C': parser->method = (unsigned)HTTPMethod::Connect; /* or COPY, CHECKOUT */ break; - case 'D': parser->method = (unsigned)HTTPMethod::Delete; break; - case 'G': parser->method = (unsigned)HTTPMethod::Get; break; - case 'H': parser->method = (unsigned)HTTPMethod::Head; break; - case 'L': parser->method = (unsigned)HTTPMethod::Lock; /* or LINK */ break; - case 'M': parser->method = (unsigned)HTTPMethod::MkCol; /* or MOVE, MKACTIVITY, MERGE, M-SEARCH, MKCALENDAR */ break; - case 'N': parser->method = (unsigned)HTTPMethod::Notify; break; - case 'O': parser->method = (unsigned)HTTPMethod::Options; break; - case 'P': parser->method = (unsigned)HTTPMethod::Post; /* or PROPFIND|PROPPATCH|PUT|PATCH|PURGE */ break; - case 'R': parser->method = (unsigned)HTTPMethod::Report; /* or REBIND */ break; - case 'S': parser->method = (unsigned)HTTPMethod::Subscribe; /* or SEARCH, SOURCE */ break; - case 'T': parser->method = (unsigned)HTTPMethod::Trace; break; - case 'U': parser->method = (unsigned)HTTPMethod::Unlock; /* or UNSUBSCRIBE, UNBIND, UNLINK */ break; - default: - CROW_SET_ERRNO(CHPE_INVALID_METHOD); - goto error; - } - parser->state = s_req_method; - - CROW_CALLBACK_NOTIFY(message_begin); - - break; - } - - case s_req_method: - { - const char *matcher; - if (CROW_UNLIKELY(ch == '\0')) { - CROW_SET_ERRNO(CHPE_INVALID_METHOD); - goto error; - } - - matcher = method_strings[parser->method]; - if (ch == ' ' && matcher[parser->index] == '\0') { - parser->state = s_req_spaces_before_url; - } else if (ch == matcher[parser->index]) { - ; /* nada */ - } else if ((ch >= 'A' && ch <= 'Z') || ch == '-') { - - switch (parser->method << 16 | parser->index << 8 | ch) { -#define CROW_XX(meth, pos, ch, new_meth) \ - case ((unsigned)HTTPMethod::meth << 16 | pos << 8 | ch): \ - parser->method = (unsigned)HTTPMethod::new_meth; break; - - CROW_XX(Post, 1, 'U', Put) - CROW_XX(Post, 1, 'A', Patch) - CROW_XX(Post, 1, 'R', Propfind) - CROW_XX(Put, 2, 'R', Purge) - CROW_XX(Connect, 1, 'H', Checkout) - CROW_XX(Connect, 2, 'P', Copy) - CROW_XX(MkCol, 1, 'O', Move) - CROW_XX(MkCol, 1, 'E', Merge) - CROW_XX(MkCol, 1, '-', MSearch) - CROW_XX(MkCol, 2, 'A', MkActivity) - CROW_XX(MkCol, 3, 'A', MkCalendar) - CROW_XX(Subscribe, 1, 'E', Search) - CROW_XX(Subscribe, 1, 'O', Source) - CROW_XX(Report, 2, 'B', Rebind) - CROW_XX(Propfind, 4, 'P', Proppatch) - CROW_XX(Lock, 1, 'I', Link) - CROW_XX(Unlock, 2, 'S', Unsubscribe) - CROW_XX(Unlock, 2, 'B', Unbind) - CROW_XX(Unlock, 3, 'I', Unlink) -#undef CROW_XX - default: - CROW_SET_ERRNO(CHPE_INVALID_METHOD); - goto error; - } - } else { - CROW_SET_ERRNO(CHPE_INVALID_METHOD); - goto error; - } - - ++parser->index; - break; - } - - case s_req_spaces_before_url: - { - if (ch == ' ') break; - - CROW_MARK(url); - CROW_MARK(url_start); - if (parser->method == (unsigned)HTTPMethod::Connect) { - parser->state = s_req_server_start; - } - - parser->state = parse_url_char(static_cast(parser->state), ch, parser, url_start_mark, p); - if (CROW_UNLIKELY(parser->state == s_dead)) { - CROW_SET_ERRNO(CHPE_INVALID_URL); - goto error; - } - - break; - } - - case s_req_schema: - case s_req_schema_slash: - case s_req_schema_slash_slash: - case s_req_server_start: - { - switch (ch) { - /* No whitespace allowed here */ - case ' ': - case cr: - case lf: - CROW_SET_ERRNO(CHPE_INVALID_URL); - goto error; - default: - parser->state = parse_url_char(static_cast(parser->state), ch, parser, url_start_mark, p); - if (CROW_UNLIKELY(parser->state == s_dead)) { - CROW_SET_ERRNO(CHPE_INVALID_URL); - goto error; - } - } - - break; - } - - case s_req_server: - case s_req_server_with_at: - case s_req_path: - case s_req_query_string_start: - case s_req_query_string: - { - switch (ch) { - case ' ': - parser->state = s_req_http_start; - CROW_CALLBACK_DATA(url); - break; - case cr: // No space after URL means no HTTP version. Which means the request is using HTTP/0.9 - case lf: - if (CROW_UNLIKELY(parser->method != (unsigned)HTTPMethod::Get)) // HTTP/0.9 doesn't define any method other than GET - { - parser->state = s_dead; - CROW_SET_ERRNO(CHPE_INVALID_VERSION); - goto error; - } - parser->http_major = 0; - parser->http_minor = 9; - parser->state = (ch == cr) ? - s_req_line_almost_done : - s_header_field_start; - CROW_CALLBACK_DATA(url); - break; - default: - parser->state = parse_url_char(static_cast(parser->state), ch, parser, url_start_mark, p); - if (CROW_UNLIKELY(parser->state == s_dead)) { - CROW_SET_ERRNO(CHPE_INVALID_URL); - goto error; - } - } - break; - } - - case s_req_http_start: - switch (ch) { - case ' ': - break; - case 'H': - parser->state = s_req_http_H; - break; - case 'I': - if (parser->method == (unsigned)HTTPMethod::Source) { - parser->state = s_req_http_I; - break; - } - /* fall through */ - default: - CROW_SET_ERRNO(CHPE_INVALID_CONSTANT); - goto error; - } - break; - - case s_req_http_H: - CROW_STRICT_CHECK(ch != 'T'); - parser->state = s_req_http_HT; - break; - - case s_req_http_HT: - CROW_STRICT_CHECK(ch != 'T'); - parser->state = s_req_http_HTT; - break; - - case s_req_http_HTT: - CROW_STRICT_CHECK(ch != 'P'); - parser->state = s_req_http_HTTP; - break; - - case s_req_http_I: - CROW_STRICT_CHECK(ch != 'C'); - parser->state = s_req_http_IC; - break; - - case s_req_http_IC: - CROW_STRICT_CHECK(ch != 'E'); - parser->state = s_req_http_HTTP; /* Treat "ICE" as "HTTP". */ - break; - - case s_req_http_HTTP: - CROW_STRICT_CHECK(ch != '/'); - parser->state = s_req_http_major; - break; - - /* dot */ - case s_req_http_major: - if (CROW_UNLIKELY(!CROW_IS_NUM(ch))) { - CROW_SET_ERRNO(CHPE_INVALID_VERSION); - goto error; - } - - parser->http_major = ch - '0'; - parser->state = s_req_http_dot; - break; - - case s_req_http_dot: - { - if (CROW_UNLIKELY(ch != '.')) { - CROW_SET_ERRNO(CHPE_INVALID_VERSION); - goto error; - } - - parser->state = s_req_http_minor; - break; - } - - /* minor HTTP version */ - case s_req_http_minor: - if (CROW_UNLIKELY(!CROW_IS_NUM(ch))) { - CROW_SET_ERRNO(CHPE_INVALID_VERSION); - goto error; - } - - parser->http_minor = ch - '0'; - parser->state = s_req_http_end; - break; - - /* end of request line */ - case s_req_http_end: - { - if (ch == cr) { - parser->state = s_req_line_almost_done; - break; - } - - if (ch == lf) { - parser->state = s_header_field_start; - break; - } - - CROW_SET_ERRNO(CHPE_INVALID_VERSION); - goto error; - break; - } - - /* end of request line */ - case s_req_line_almost_done: - { - if (CROW_UNLIKELY(ch != lf)) { - CROW_SET_ERRNO(CHPE_LF_EXPECTED); - goto error; - } - - parser->state = s_header_field_start; - break; - } - - case s_header_field_start: - { - if (ch == cr) { - parser->state = s_headers_almost_done; - break; - } - - if (ch == lf) { - /* they might be just sending \n instead of \r\n so this would be - * the second \n to denote the end of headers*/ - parser->state = s_headers_almost_done; - CROW_REEXECUTE(); - } - - c = CROW_TOKEN(ch); - - if (CROW_UNLIKELY(!c)) { - CROW_SET_ERRNO(CHPE_INVALID_HEADER_TOKEN); - goto error; - } - - CROW_MARK(header_field); - - parser->index = 0; - parser->state = s_header_field; - - switch (c) { - case 'c': - parser->header_state = h_C; - break; - - case 'p': - parser->header_state = h_matching_proxy_connection; - break; - - case 't': - parser->header_state = h_matching_transfer_encoding; - break; - - case 'u': - parser->header_state = h_matching_upgrade; - break; - - default: - parser->header_state = h_general; - break; - } - break; - } - - case s_header_field: - { - const char* start = p; - for (; p != data + len; p++) { - ch = *p; - c = CROW_TOKEN(ch); - - if (!c) - break; - - switch (parser->header_state) { - case h_general: { - size_t left = data + len - p; - const char* pe = p + CROW_MIN(left, max_header_size); - while (p+1 < pe && CROW_TOKEN(p[1])) { - p++; - } - break; - } - - case h_C: - parser->index++; - parser->header_state = (c == 'o' ? h_CO : h_general); - break; - - case h_CO: - parser->index++; - parser->header_state = (c == 'n' ? h_CON : h_general); - break; - - case h_CON: - parser->index++; - switch (c) { - case 'n': - parser->header_state = h_matching_connection; - break; - case 't': - parser->header_state = h_matching_content_length; - break; - default: - parser->header_state = h_general; - break; - } - break; - - /* connection */ - - case h_matching_connection: - parser->index++; - if (parser->index > sizeof(CROW_CONNECTION)-1 || c != CROW_CONNECTION[parser->index]) { - parser->header_state = h_general; - } else if (parser->index == sizeof(CROW_CONNECTION)-2) { - parser->header_state = h_connection; - } - break; - - /* proxy-connection */ - - case h_matching_proxy_connection: - parser->index++; - if (parser->index > sizeof(CROW_PROXY_CONNECTION)-1 || c != CROW_PROXY_CONNECTION[parser->index]) { - parser->header_state = h_general; - } else if (parser->index == sizeof(CROW_PROXY_CONNECTION)-2) { - parser->header_state = h_connection; - } - break; - - /* content-length */ - - case h_matching_content_length: - parser->index++; - if (parser->index > sizeof(CROW_CONTENT_LENGTH)-1 || c != CROW_CONTENT_LENGTH[parser->index]) { - parser->header_state = h_general; - } else if (parser->index == sizeof(CROW_CONTENT_LENGTH)-2) { - parser->header_state = h_content_length; - } - break; - - /* transfer-encoding */ - - case h_matching_transfer_encoding: - parser->index++; - if (parser->index > sizeof(CROW_TRANSFER_ENCODING)-1 || c != CROW_TRANSFER_ENCODING[parser->index]) { - parser->header_state = h_general; - } else if (parser->index == sizeof(CROW_TRANSFER_ENCODING)-2) { - parser->header_state = h_transfer_encoding; - parser->uses_transfer_encoding = 1; - } - break; - - /* upgrade */ - - case h_matching_upgrade: - parser->index++; - if (parser->index > sizeof(CROW_UPGRADE)-1 || c != CROW_UPGRADE[parser->index]) { - parser->header_state = h_general; - } else if (parser->index == sizeof(CROW_UPGRADE)-2) { - parser->header_state = h_upgrade; - } - break; - - case h_connection: - case h_content_length: - case h_transfer_encoding: - case h_upgrade: - if (ch != ' ') parser->header_state = h_general; - break; - - default: - assert(0 && "Unknown header_state"); - break; - } - } - - if (p == data + len) { - --p; - CROW_COUNT_HEADER_SIZE(p - start); - break; - } - - CROW_COUNT_HEADER_SIZE(p - start); - - if (ch == ':') { - parser->state = s_header_value_discard_ws; - CROW_CALLBACK_DATA(header_field); - break; - } -/* RFC-7230 Sec 3.2.4 expressly forbids line-folding in header field-names. - if (ch == cr) { - parser->state = s_header_almost_done; - CROW_CALLBACK_DATA(header_field); - break; - } - - if (ch == lf) { - parser->state = s_header_field_start; - CROW_CALLBACK_DATA(header_field); - break; - } -*/ - CROW_SET_ERRNO(CHPE_INVALID_HEADER_TOKEN); - goto error; - } - - case s_header_value_discard_ws: - if (ch == ' ' || ch == '\t') break; - - if (ch == cr) { - parser->state = s_header_value_discard_ws_almost_done; - break; - } - - if (ch == lf) { - parser->state = s_header_value_discard_lws; - break; - } - - /* fall through */ - - case s_header_value_start: - { - CROW_MARK(header_value); - - parser->state = s_header_value; - parser->index = 0; - - c = CROW_LOWER(ch); - - switch (parser->header_state) { - case h_upgrade: - parser->flags |= F_UPGRADE; - parser->header_state = h_general; - break; - - case h_transfer_encoding: - /* looking for 'Transfer-Encoding: chunked' */ - if ('c' == c) { - parser->header_state = h_matching_transfer_encoding_chunked; - } else { - parser->header_state = h_matching_transfer_encoding_token; - } - break; - - /* Multi-value `Transfer-Encoding` header */ - case h_matching_transfer_encoding_token_start: - break; - - case h_content_length: - if (CROW_UNLIKELY(!CROW_IS_NUM(ch))) { - CROW_SET_ERRNO(CHPE_INVALID_CONTENT_LENGTH); - goto error; - } - - if (parser->flags & F_CONTENTLENGTH) { - CROW_SET_ERRNO(CHPE_UNEXPECTED_CONTENT_LENGTH); - goto error; - } - parser->flags |= F_CONTENTLENGTH; - parser->content_length = ch - '0'; - parser->header_state = h_content_length_num; - break; - - /* when obsolete line folding is encountered for content length - * continue to the s_header_value state */ - case h_content_length_ws: - break; - - case h_connection: - /* looking for 'Connection: keep-alive' */ - if (c == 'k') { - parser->header_state = h_matching_connection_keep_alive; - /* looking for 'Connection: close' */ - } else if (c == 'c') { - parser->header_state = h_matching_connection_close; - } else if (c == ' ' || c == '\t') { - /* Skip lws */ - } else { - parser->header_state = h_general; - } - break; - - default: - parser->header_state = h_general; - break; - } - break; - } - - case s_header_value: - { - const char* start = p; - enum header_states h_state = static_cast(parser->header_state); - for (; p != data + len; p++) { - ch = *p; - - if (ch == cr) { - parser->state = s_header_almost_done; - parser->header_state = h_state; - CROW_CALLBACK_DATA(header_value); - break; - } - - if (ch == lf) { - parser->state = s_header_almost_done; - CROW_COUNT_HEADER_SIZE(p - start); - parser->header_state = h_state; - CROW_CALLBACK_DATA_NOADVANCE(header_value); - CROW_REEXECUTE(); - } - - if (!lenient && !CROW_IS_HEADER_CHAR(ch)) { - CROW_SET_ERRNO(CHPE_INVALID_HEADER_TOKEN); - goto error; - } - - c = CROW_LOWER(ch); - - switch (h_state) { - case h_general: - { - size_t left = data + len - p; - const char* pe = p + CROW_MIN(left, max_header_size); - - for (; p != pe; p++) { - ch = *p; - if (ch == cr || ch == lf) { - --p; - break; - } - if (!lenient && !CROW_IS_HEADER_CHAR(ch)) { - CROW_SET_ERRNO(CHPE_INVALID_HEADER_TOKEN); - goto error; - } - } - if (p == data + len) - --p; - break; - } - - case h_connection: - case h_transfer_encoding: - assert(0 && "Shouldn't get here."); - break; - - case h_content_length: - if (ch == ' ') break; - h_state = h_content_length_num; - /* fall through */ - - case h_content_length_num: - { - uint64_t t; - - if (ch == ' ') { - h_state = h_content_length_ws; - break; - } - - if (CROW_UNLIKELY(!CROW_IS_NUM(ch))) { - CROW_SET_ERRNO(CHPE_INVALID_CONTENT_LENGTH); - parser->header_state = h_state; - goto error; - } - - t = parser->content_length; - t *= 10; - t += ch - '0'; - - /* Overflow? Test against a conservative limit for simplicity. */ - if (CROW_UNLIKELY((CROW_ULLONG_MAX - 10) / 10 < parser->content_length)) { - CROW_SET_ERRNO(CHPE_INVALID_CONTENT_LENGTH); - parser->header_state = h_state; - goto error; - } - - parser->content_length = t; - break; - } - - case h_content_length_ws: - if (ch == ' ') break; - CROW_SET_ERRNO(CHPE_INVALID_CONTENT_LENGTH); - parser->header_state = h_state; - goto error; - - /* Transfer-Encoding: chunked */ - case h_matching_transfer_encoding_token_start: - /* looking for 'Transfer-Encoding: chunked' */ - if ('c' == c) { - h_state = h_matching_transfer_encoding_chunked; - } else if (CROW_TOKEN(c)) { - /* TODO(indutny): similar code below does this, but why? - * At the very least it seems to be inconsistent given that - * h_matching_transfer_encoding_token does not check for - * `STRICT_TOKEN` - */ - h_state = h_matching_transfer_encoding_token; - } else if (c == ' ' || c == '\t') { - /* Skip lws */ - } else { - h_state = h_general; - } - break; - - case h_matching_transfer_encoding_chunked: - parser->index++; - if (parser->index > sizeof(CROW_CHUNKED)-1 || c != CROW_CHUNKED[parser->index]) { - h_state = h_matching_transfer_encoding_token; - } else if (parser->index == sizeof(CROW_CHUNKED)-2) { - h_state = h_transfer_encoding_chunked; - } - break; - - case h_matching_transfer_encoding_token: - if (ch == ',') { - h_state = h_matching_transfer_encoding_token_start; - parser->index = 0; - } - break; - - /* looking for 'Connection: keep-alive' */ - case h_matching_connection_keep_alive: - parser->index++; - if (parser->index > sizeof(CROW_KEEP_ALIVE)-1 || c != CROW_KEEP_ALIVE[parser->index]) { - h_state = h_general; - } else if (parser->index == sizeof(CROW_KEEP_ALIVE)-2) { - h_state = h_connection_keep_alive; - } - break; - - /* looking for 'Connection: close' */ - case h_matching_connection_close: - parser->index++; - if (parser->index > sizeof(CROW_CLOSE)-1 || c != CROW_CLOSE[parser->index]) { - h_state = h_general; - } else if (parser->index == sizeof(CROW_CLOSE)-2) { - h_state = h_connection_close; - } - break; - - // Edited from original (because of commits that werent included) - case h_transfer_encoding_chunked: - if (ch != ' ') h_state = h_matching_transfer_encoding_token; - break; - case h_connection_keep_alive: - case h_connection_close: - if (ch != ' ') h_state = h_general; - break; - - default: - parser->state = s_header_value; - h_state = h_general; - break; - } - } - parser->header_state = h_state; - - - if (p == data + len) - --p; - - CROW_COUNT_HEADER_SIZE(p - start); - break; - } - - case s_header_almost_done: - { - if (CROW_UNLIKELY(ch != lf)) { - CROW_SET_ERRNO(CHPE_LF_EXPECTED); - goto error; - } - - parser->state = s_header_value_lws; - break; - } - - case s_header_value_lws: - { - if (ch == ' ' || ch == '\t') { - if (parser->header_state == h_content_length_num) { - /* treat obsolete line folding as space */ - parser->header_state = h_content_length_ws; - } - parser->state = s_header_value_start; - CROW_REEXECUTE(); - } - - /* finished the header */ - switch (parser->header_state) { - case h_connection_keep_alive: - parser->flags |= F_CONNECTION_KEEP_ALIVE; - break; - case h_connection_close: - parser->flags |= F_CONNECTION_CLOSE; - break; - case h_transfer_encoding_chunked: - parser->flags |= F_CHUNKED; - break; - default: - break; - } - - parser->state = s_header_field_start; - CROW_REEXECUTE(); - } - - case s_header_value_discard_ws_almost_done: - { - CROW_STRICT_CHECK(ch != lf); - parser->state = s_header_value_discard_lws; - break; - } - - case s_header_value_discard_lws: - { - if (ch == ' ' || ch == '\t') { - parser->state = s_header_value_discard_ws; - break; - } else { - /* header value was empty */ - CROW_MARK(header_value); - parser->state = s_header_field_start; - CROW_CALLBACK_DATA_NOADVANCE(header_value); - CROW_REEXECUTE(); - } - } - - case s_headers_almost_done: - { - CROW_STRICT_CHECK(ch != lf); - - if (parser->flags & F_TRAILING) { - /* End of a chunked request */ - parser->state = CROW_NEW_MESSAGE(); - CROW_CALLBACK_NOTIFY(message_complete); - break; - } - - /* Cannot use transfer-encoding and a content-length header together - per the HTTP specification. (RFC 7230 Section 3.3.3) */ - if ((parser->uses_transfer_encoding == 1) && - (parser->flags & F_CONTENTLENGTH)) { - /* Allow it for lenient parsing as long as `Transfer-Encoding` is - * not `chunked` or allow_length_with_encoding is set - */ - if (parser->flags & F_CHUNKED) { - if (!allow_chunked_length) { - CROW_SET_ERRNO(CHPE_UNEXPECTED_CONTENT_LENGTH); - goto error; - } - } else if (!lenient) { - CROW_SET_ERRNO(CHPE_UNEXPECTED_CONTENT_LENGTH); - goto error; - } - } - - parser->state = s_headers_done; - - /* Set this here so that on_headers_complete() callbacks can see it */ - parser->upgrade = - (parser->flags & F_UPGRADE || parser->method == (unsigned)HTTPMethod::Connect); - - /* Here we call the headers_complete callback. This is somewhat - * different than other callbacks because if the user returns 1, we - * will interpret that as saying that this message has no body. This - * is needed for the annoying case of recieving a response to a HEAD - * request. - * - * We'd like to use CROW_CALLBACK_NOTIFY_NOADVANCE() here but we cannot, so - * we have to simulate it by handling a change in errno below. - */ - if (settings->on_headers_complete) { - switch (settings->on_headers_complete(parser)) { - case 0: - break; - - case 2: - parser->upgrade = 1; - //break; - - /* fall through */ - case 1: - parser->flags |= F_SKIPBODY; - break; - - default: - CROW_SET_ERRNO(CHPE_CB_headers_complete); - parser->nread = nread; - return p - data; /* Error */ - } - } - - if (CROW_HTTP_PARSER_ERRNO(parser) != CHPE_OK) { - parser->nread = nread; - return p - data; - } - - CROW_REEXECUTE(); - } - - case s_headers_done: - { - CROW_STRICT_CHECK(ch != lf); - - parser->nread = 0; - nread = 0; - - /* Exit, the rest of the connect is in a different protocol. */ - if (parser->upgrade) { - parser->state = CROW_NEW_MESSAGE(); - CROW_CALLBACK_NOTIFY(message_complete); - parser->nread = nread; - return (p - data) + 1; - } - - if (parser->flags & F_SKIPBODY) { - parser->state = CROW_NEW_MESSAGE(); - CROW_CALLBACK_NOTIFY(message_complete); - } else if (parser->flags & F_CHUNKED) { - /* chunked encoding - ignore Content-Length header, - * prepare for a chunk */ - parser->state = s_chunk_size_start; - } - else if (parser->uses_transfer_encoding == 1) - { - if (!lenient) - { - /* RFC 7230 3.3.3 */ - - /* If a Transfer-Encoding header field - * is present in a request and the chunked transfer coding is not - * the final encoding, the message body length cannot be determined - * reliably; the server MUST respond with the 400 (Bad Request) - * status code and then close the connection. - */ - CROW_SET_ERRNO(CHPE_INVALID_TRANSFER_ENCODING); - parser->nread = nread; - return (p - data); /* Error */ - } - else - { - /* RFC 7230 3.3.3 */ - - /* If a Transfer-Encoding header field is present in a response and - * the chunked transfer coding is not the final encoding, the - * message body length is determined by reading the connection until - * it is closed by the server. - */ - parser->state = s_body_identity_eof; - } - } - else - { - if (parser->content_length == 0) - { - /* Content-Length header given but zero: Content-Length: 0\r\n */ - parser->state = CROW_NEW_MESSAGE(); - CROW_CALLBACK_NOTIFY(message_complete); - } - else if (parser->content_length != CROW_ULLONG_MAX) - { - /* Content-Length header given and non-zero */ - parser->state = s_body_identity; - } - else - { - /* Assume content-length 0 - read the next */ - parser->state = CROW_NEW_MESSAGE(); - CROW_CALLBACK_NOTIFY(message_complete); - } - } - - break; - } - - case s_body_identity: - { - uint64_t to_read = CROW_MIN(parser->content_length, - (uint64_t) ((data + len) - p)); - - assert(parser->content_length != 0 - && parser->content_length != CROW_ULLONG_MAX); - - /* The difference between advancing content_length and p is because - * the latter will automaticaly advance on the next loop iteration. - * Further, if content_length ends up at 0, we want to see the last - * byte again for our message complete callback. - */ - CROW_MARK(body); - parser->content_length -= to_read; - p += to_read - 1; - - if (parser->content_length == 0) { - parser->state = s_message_done; - - /* Mimic CROW_CALLBACK_DATA_NOADVANCE() but with one extra byte. - * - * The alternative to doing this is to wait for the next byte to - * trigger the data callback, just as in every other case. The - * problem with this is that this makes it difficult for the test - * harness to distinguish between complete-on-EOF and - * complete-on-length. It's not clear that this distinction is - * important for applications, but let's keep it for now. - */ - CROW_CALLBACK_DATA_(body, p - body_mark + 1, p - data); - CROW_REEXECUTE(); - } - - break; - } - - /* read until EOF */ - case s_body_identity_eof: - CROW_MARK(body); - p = data + len - 1; - - break; - - case s_message_done: - parser->state = CROW_NEW_MESSAGE(); - CROW_CALLBACK_NOTIFY(message_complete); - break; - - case s_chunk_size_start: - { - assert(nread == 1); - assert(parser->flags & F_CHUNKED); - - unhex_val = unhex[static_cast(ch)]; - if (CROW_UNLIKELY(unhex_val == -1)) { - CROW_SET_ERRNO(CHPE_INVALID_CHUNK_SIZE); - goto error; - } - - parser->content_length = unhex_val; - parser->state = s_chunk_size; - break; - } - - case s_chunk_size: - { - uint64_t t; - - assert(parser->flags & F_CHUNKED); - - if (ch == cr) { - parser->state = s_chunk_size_almost_done; - break; - } - - unhex_val = unhex[static_cast(ch)]; - - if (unhex_val == -1) { - if (ch == ';' || ch == ' ') { - parser->state = s_chunk_parameters; - break; - } - - CROW_SET_ERRNO(CHPE_INVALID_CHUNK_SIZE); - goto error; - } - - t = parser->content_length; - t *= 16; - t += unhex_val; - - /* Overflow? Test against a conservative limit for simplicity. */ - if (CROW_UNLIKELY((CROW_ULLONG_MAX - 16) / 16 < parser->content_length)) { - CROW_SET_ERRNO(CHPE_INVALID_CONTENT_LENGTH); - goto error; - } - - parser->content_length = t; - break; - } - - case s_chunk_parameters: - { - assert(parser->flags & F_CHUNKED); - /* just ignore this shit. TODO check for overflow */ - if (ch == cr) { - parser->state = s_chunk_size_almost_done; - break; - } - break; - } - - case s_chunk_size_almost_done: - { - assert(parser->flags & F_CHUNKED); - CROW_STRICT_CHECK(ch != lf); - - parser->nread = 0; - nread = 0; - - if (parser->content_length == 0) { - parser->flags |= F_TRAILING; - parser->state = s_header_field_start; - } else { - parser->state = s_chunk_data; - } - break; - } - - case s_chunk_data: - { - uint64_t to_read = CROW_MIN(parser->content_length, - (uint64_t) ((data + len) - p)); - - assert(parser->flags & F_CHUNKED); - assert(parser->content_length != 0 - && parser->content_length != CROW_ULLONG_MAX); - - /* See the explanation in s_body_identity for why the content - * length and data pointers are managed this way. - */ - CROW_MARK(body); - parser->content_length -= to_read; - p += to_read - 1; - - if (parser->content_length == 0) { - parser->state = s_chunk_data_almost_done; - } - - break; - } - - case s_chunk_data_almost_done: - assert(parser->flags & F_CHUNKED); - assert(parser->content_length == 0); - CROW_STRICT_CHECK(ch != cr); - parser->state = s_chunk_data_done; - CROW_CALLBACK_DATA(body); - break; - - case s_chunk_data_done: - assert(parser->flags & F_CHUNKED); - CROW_STRICT_CHECK(ch != lf); - parser->nread = 0; - nread = 0; - parser->state = s_chunk_size_start; - break; - - default: - assert(0 && "unhandled state"); - CROW_SET_ERRNO(CHPE_INVALID_INTERNAL_STATE); - goto error; - } - } - - /* Run callbacks for any marks that we have leftover after we ran out of - * bytes. There should be at most one of these set, so it's OK to invoke - * them in series (unset marks will not result in callbacks). - * - * We use the NOADVANCE() variety of callbacks here because 'p' has already - * overflowed 'data' and this allows us to correct for the off-by-one that - * we'd otherwise have (since CROW_CALLBACK_DATA() is meant to be run with a 'p' - * value that's in-bounds). - */ - - assert(((header_field_mark ? 1 : 0) + - (header_value_mark ? 1 : 0) + - (url_mark ? 1 : 0) + - (body_mark ? 1 : 0)) <= 1); - - CROW_CALLBACK_DATA_NOADVANCE(header_field); - CROW_CALLBACK_DATA_NOADVANCE(header_value); - CROW_CALLBACK_DATA_NOADVANCE(url); - CROW_CALLBACK_DATA_NOADVANCE(body); - - parser->nread = nread; - return len; - -error: - if (CROW_HTTP_PARSER_ERRNO(parser) == CHPE_OK) { - CROW_SET_ERRNO(CHPE_UNKNOWN); - } - - parser->nread = nread; - return (p - data); -} - -inline void - http_parser_init(http_parser* parser) -{ - void *data = parser->data; /* preserve application data */ - memset(parser, 0, sizeof(*parser)); - parser->data = data; - parser->state = s_start_req; - parser->http_errno = CHPE_OK; -} - -/* Return a string name of the given error */ -inline const char * -http_errno_name(enum http_errno err) { -/* Map errno values to strings for human-readable output */ -#define CROW_HTTP_STRERROR_GEN(n, s) { "CHPE_" #n, s }, -static struct { - const char *name; - const char *description; -} http_strerror_tab[] = { - CROW_HTTP_ERRNO_MAP(CROW_HTTP_STRERROR_GEN) -}; -#undef CROW_HTTP_STRERROR_GEN - assert(((size_t) err) < CROW_ARRAY_SIZE(http_strerror_tab)); - return http_strerror_tab[err].name; -} - -/* Return a string description of the given error */ -inline const char * -http_errno_description(enum http_errno err) { -/* Map errno values to strings for human-readable output */ -#define CROW_HTTP_STRERROR_GEN(n, s) { "CHPE_" #n, s }, -static struct { - const char *name; - const char *description; -} http_strerror_tab[] = { - CROW_HTTP_ERRNO_MAP(CROW_HTTP_STRERROR_GEN) -}; -#undef CROW_HTTP_STRERROR_GEN - assert(((size_t) err) < CROW_ARRAY_SIZE(http_strerror_tab)); - return http_strerror_tab[err].description; -} - -/* Checks if this is the final chunk of the body. */ -inline int -http_body_is_final(const struct http_parser *parser) { - return parser->state == s_message_done; -} - -/* Change the maximum header size provided at compile time. */ -inline void -http_parser_set_max_header_size(uint32_t size) { - max_header_size = size; -} - -#undef CROW_HTTP_ERRNO_MAP -#undef CROW_SET_ERRNO -#undef CROW_CALLBACK_NOTIFY_ -#undef CROW_CALLBACK_NOTIFY -#undef CROW_CALLBACK_NOTIFY_NOADVANCE -#undef CROW_CALLBACK_DATA_ -#undef CROW_CALLBACK_DATA -#undef CROW_CALLBACK_DATA_NOADVANCE -#undef CROW_MARK -#undef CROW_PROXY_CONNECTION -#undef CROW_CONNECTION -#undef CROW_CONTENT_LENGTH -#undef CROW_TRANSFER_ENCODING -#undef CROW_UPGRADE -#undef CROW_CHUNKED -#undef CROW_KEEP_ALIVE -#undef CROW_CLOSE -#undef CROW_PARSING_HEADER -#undef CROW_LOWER -#undef CROW_IS_ALPHA -#undef CROW_IS_NUM -#undef CROW_IS_ALPHANUM -//#undef CROW_IS_HEX -#undef CROW_IS_MARK -#undef CROW_IS_USERINFO_CHAR -#undef CROW_TOKEN -#undef CROW_IS_URL_CHAR -//#undef CROW_IS_HOST_CHAR -#undef CROW_start_state -#undef CROW_STRICT_CHECK -#undef CROW_NEW_MESSAGE - -} -} - -// clang-format on - - - -#pragma once - -#include -#include -#include -#include - - - - - - -namespace crow -{ - /// A wrapper for `nodejs/http-parser`. - - /// - /// Used to generate a \ref crow.request from the TCP socket buffer. - template - struct HTTPParser : public http_parser - { - static int on_message_begin(http_parser* self_) - { - HTTPParser* self = static_cast(self_); - self->clear(); - return 0; - } - static int on_url(http_parser* self_, const char* at, size_t length) - { - HTTPParser* self = static_cast(self_); - self->raw_url.insert(self->raw_url.end(), at, at + length); - return 0; - } - static int on_header_field(http_parser* self_, const char* at, size_t length) - { - HTTPParser* self = static_cast(self_); - switch (self->header_building_state) - { - case 0: - if (!self->header_value.empty()) - { - self->headers.emplace(std::move(self->header_field), std::move(self->header_value)); - } - self->header_field.assign(at, at + length); - self->header_building_state = 1; - break; - case 1: - self->header_field.insert(self->header_field.end(), at, at + length); - break; - } - return 0; - } - static int on_header_value(http_parser* self_, const char* at, size_t length) - { - HTTPParser* self = static_cast(self_); - switch (self->header_building_state) - { - case 0: - self->header_value.insert(self->header_value.end(), at, at + length); - break; - case 1: - self->header_building_state = 0; - self->header_value.assign(at, at + length); - break; - } - return 0; - } - static int on_headers_complete(http_parser* self_) - { - HTTPParser* self = static_cast(self_); - if (!self->header_field.empty()) - { - self->headers.emplace(std::move(self->header_field), std::move(self->header_value)); - } - - self->set_connection_parameters(); - - self->process_header(); - return 0; - } - static int on_body(http_parser* self_, const char* at, size_t length) - { - HTTPParser* self = static_cast(self_); - self->body.insert(self->body.end(), at, at + length); - return 0; - } - static int on_message_complete(http_parser* self_) - { - HTTPParser* self = static_cast(self_); - - // url params - self->url = self->raw_url.substr(0, self->qs_point != 0 ? self->qs_point : std::string::npos); - self->url_params = query_string(self->raw_url); - - self->process_message(); - return 0; - } - HTTPParser(Handler* handler): - handler_(handler) - { - http_parser_init(this); - } - - // return false on error - /// Parse a buffer into the different sections of an HTTP request. - bool feed(const char* buffer, int length) - { - const static http_parser_settings settings_{ - on_message_begin, - on_url, - on_header_field, - on_header_value, - on_headers_complete, - on_body, - on_message_complete, - }; - - int nparsed = http_parser_execute(this, &settings_, buffer, length); - if (http_errno != CHPE_OK) - { - return false; - } - return nparsed == length; - } - - bool done() - { - return feed(nullptr, 0); - } - - void clear() - { - url.clear(); - raw_url.clear(); - header_field.clear(); - header_value.clear(); - headers.clear(); - url_params.clear(); - body.clear(); - header_building_state = 0; - qs_point = 0; - http_major = 0; - http_minor = 0; - keep_alive = false; - close_connection = false; - } - - inline void process_header() - { - handler_->handle_header(); - } - - inline void process_message() - { - handler_->handle(); - } - - inline void set_connection_parameters() - { - //NOTE(EDev): it seems that the problem is with crow's policy on closing the connection for HTTP_VERSION < 1.0, the behaviour for that in crow is "don't close the connection, but don't send a keep-alive either" - - // HTTP1.1 = always send keep_alive, HTTP1.0 = only send if header exists, HTTP?.? = never send - keep_alive = (http_major == 1 && http_minor == 0) ? - ((flags & F_CONNECTION_KEEP_ALIVE) ? true : false) : - ((http_major == 1 && http_minor == 1) ? true : false); - - // HTTP1.1 = only close if close header exists, HTTP1.0 = always close unless keep_alive header exists, HTTP?.?= never close - close_connection = (http_major == 1 && http_minor == 0) ? - ((flags & F_CONNECTION_KEEP_ALIVE) ? false : true) : - ((http_major == 1 && http_minor == 1) ? ((flags & F_CONNECTION_CLOSE) ? true : false) : false); - } - - /// Take the parsed HTTP request data and convert it to a \ref crow.request - request to_request() const - { - return request{static_cast(method), std::move(raw_url), std::move(url), std::move(url_params), std::move(headers), std::move(body), http_major, http_minor, keep_alive, close_connection, static_cast(upgrade)}; - } - - std::string raw_url; - std::string url; - - int header_building_state = 0; - std::string header_field; - std::string header_value; - ci_map headers; - query_string url_params; ///< What comes after the `?` in the URL. - std::string body; - bool keep_alive; ///< Whether or not the server should send a `connection: Keep-Alive` header to the client. - bool close_connection; ///< Whether or not the server should shut down the TCP connection once a response is sent. - - Handler* handler_; ///< This is currently an HTTP connection object (\ref crow.Connection). - }; -} // namespace crow - - - -#pragma once - - - - - - - - -namespace crow -{ - namespace detail - { - - - template - struct partial_context : public black_magic::pop_back::template rebind, public black_magic::last_element_type::type::context - { - using parent_context = typename black_magic::pop_back::template rebind<::crow::detail::partial_context>; - template - using partial = typename std::conditional>::type; - - template - typename T::context& get() - { - return static_cast(*this); - } - }; - - - - template<> - struct partial_context<> - { - template - using partial = partial_context; - }; - - - template - struct context : private partial_context - //struct context : private Middlewares::context... // simple but less type-safe - { - template class CallCriteria, int N, typename Context, typename Container> - friend typename std::enable_if<(N == 0)>::type after_handlers_call_helper(Container& middlewares, Context& ctx, request& req, response& res); - template class CallCriteria, int N, typename Context, typename Container> - friend typename std::enable_if<(N > 0)>::type after_handlers_call_helper(Container& middlewares, Context& ctx, request& req, response& res); - - template class CallCriteria, int N, typename Context, typename Container> - friend typename std::enable_if<(N < std::tuple_size::type>::value), bool>::type - middleware_call_helper(Container& middlewares, request& req, response& res, Context& ctx); - - template - typename T::context& get() - { - return static_cast(*this); - } - - template - using partial = typename partial_context::template partial; - }; - } // namespace detail -} // namespace crow - - - -#pragma once - -//#define CROW_JSON_NO_ERROR_CHECK -//#define CROW_JSON_USE_MAP - -#include -#ifdef CROW_JSON_USE_MAP -#include -#else -#include -#endif -#include -#include -#include -#include -#include -#include -#include -#include - - - - - - - - - - -using std::isinf; -using std::isnan; - - -namespace crow -{ - namespace mustache - { - class template_t; - } - - namespace json - { - inline void escape(const std::string& str, std::string& ret) - { - ret.reserve(ret.size() + str.size() + str.size() / 4); - for (auto c : str) - { - switch (c) - { - case '"': ret += "\\\""; break; - case '\\': ret += "\\\\"; break; - case '\n': ret += "\\n"; break; - case '\b': ret += "\\b"; break; - case '\f': ret += "\\f"; break; - case '\r': ret += "\\r"; break; - case '\t': ret += "\\t"; break; - default: - if (c >= 0 && c < 0x20) - { - ret += "\\u00"; - auto to_hex = [](char c) { - c = c & 0xf; - if (c < 10) - return '0' + c; - return 'a' + c - 10; - }; - ret += to_hex(c / 16); - ret += to_hex(c % 16); - } - else - ret += c; - break; - } - } - } - inline std::string escape(const std::string& str) - { - std::string ret; - escape(str, ret); - return ret; - } - - enum class type : char - { - Null, - False, - True, - Number, - String, - List, - Object, - Function - }; - - inline const char* get_type_str(type t) - { - switch (t) - { - case type::Number: return "Number"; - case type::False: return "False"; - case type::True: return "True"; - case type::List: return "List"; - case type::String: return "String"; - case type::Object: return "Object"; - case type::Function: return "Function"; - default: return "Unknown"; - } - } - - enum class num_type : char - { - Signed_integer, - Unsigned_integer, - Floating_point, - Null - }; - - class rvalue; - rvalue load(const char* data, size_t size); - - namespace detail - { - /// A read string implementation with comparison functionality. - struct r_string : boost::less_than_comparable, boost::less_than_comparable, boost::equality_comparable, boost::equality_comparable - { - r_string(){}; - r_string(char* s, char* e): - s_(s), e_(e){}; - ~r_string() - { - if (owned_) - delete[] s_; - } - - r_string(const r_string& r) - { - *this = r; - } - - r_string(r_string&& r) - { - *this = r; - } - - r_string& operator=(r_string&& r) - { - s_ = r.s_; - e_ = r.e_; - owned_ = r.owned_; - if (r.owned_) - r.owned_ = 0; - return *this; - } - - r_string& operator=(const r_string& r) - { - s_ = r.s_; - e_ = r.e_; - owned_ = 0; - return *this; - } - - operator std::string() const - { - return std::string(s_, e_); - } - - - const char* begin() const { return s_; } - const char* end() const { return e_; } - size_t size() const { return end() - begin(); } - - using iterator = const char*; - using const_iterator = const char*; - - char* s_; ///< Start. - mutable char* e_; ///< End. - uint8_t owned_{0}; - friend std::ostream& operator<<(std::ostream& os, const r_string& s) - { - os << static_cast(s); - return os; - } - - private: - void force(char* s, uint32_t length) - { - s_ = s; - e_ = s_ + length; - owned_ = 1; - } - friend rvalue crow::json::load(const char* data, size_t size); - }; - - inline bool operator<(const r_string& l, const r_string& r) - { - return boost::lexicographical_compare(l, r); - } - - inline bool operator<(const r_string& l, const std::string& r) - { - return boost::lexicographical_compare(l, r); - } - - inline bool operator>(const r_string& l, const std::string& r) - { - return boost::lexicographical_compare(r, l); - } - - inline bool operator==(const r_string& l, const r_string& r) - { - return boost::equals(l, r); - } - - inline bool operator==(const r_string& l, const std::string& r) - { - return boost::equals(l, r); - } - } // namespace detail - - /// JSON read value. - - /// - /// Value can mean any json value, including a JSON object. - /// Read means this class is used to primarily read strings into a JSON value. - class rvalue - { - static const int cached_bit = 2; - static const int error_bit = 4; - - public: - rvalue() noexcept: - option_{error_bit} - { - } - rvalue(type t) noexcept: - lsize_{}, lremain_{}, t_{t} - { - } - rvalue(type t, char* s, char* e) noexcept: - start_{s}, end_{e}, t_{t} - { - determine_num_type(); - } - - rvalue(const rvalue& r): - start_(r.start_), end_(r.end_), key_(r.key_), t_(r.t_), nt_(r.nt_), option_(r.option_) - { - copy_l(r); - } - - rvalue(rvalue&& r) noexcept - { - *this = std::move(r); - } - - rvalue& operator=(const rvalue& r) - { - start_ = r.start_; - end_ = r.end_; - key_ = r.key_; - t_ = r.t_; - nt_ = r.nt_; - option_ = r.option_; - copy_l(r); - return *this; - } - rvalue& operator=(rvalue&& r) noexcept - { - start_ = r.start_; - end_ = r.end_; - key_ = std::move(r.key_); - l_ = std::move(r.l_); - lsize_ = r.lsize_; - lremain_ = r.lremain_; - t_ = r.t_; - nt_ = r.nt_; - option_ = r.option_; - return *this; - } - - explicit operator bool() const noexcept - { - return (option_ & error_bit) == 0; - } - - explicit operator int64_t() const - { - return i(); - } - - explicit operator uint64_t() const - { - return u(); - } - - explicit operator int() const - { - return static_cast(i()); - } - - /// Return any json value (not object or list) as a string. - explicit operator std::string() const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (t() == type::Object || t() == type::List) - throw std::runtime_error("json type container"); -#endif - switch (t()) - { - case type::String: - return std::string(s()); - case type::Null: - return std::string("null"); - case type::True: - return std::string("true"); - case type::False: - return std::string("false"); - default: - return std::string(start_, end_ - start_); - } - } - - /// The type of the JSON value. - type t() const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (option_ & error_bit) - { - throw std::runtime_error("invalid json object"); - } -#endif - return t_; - } - - /// The number type of the JSON value. - num_type nt() const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (option_ & error_bit) - { - throw std::runtime_error("invalid json object"); - } -#endif - return nt_; - } - - /// The integer value. - int64_t i() const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - switch (t()) - { - case type::Number: - case type::String: - return boost::lexical_cast(start_, end_ - start_); - default: - const std::string msg = "expected number, got: " + std::string(get_type_str(t())); - throw std::runtime_error(msg); - } -#endif - return boost::lexical_cast(start_, end_ - start_); - } - - /// The unsigned integer value. - uint64_t u() const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - switch (t()) - { - case type::Number: - case type::String: - return boost::lexical_cast(start_, end_ - start_); - default: - throw std::runtime_error(std::string("expected number, got: ") + get_type_str(t())); - } -#endif - return boost::lexical_cast(start_, end_ - start_); - } - - /// The double precision floating-point number value. - double d() const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (t() != type::Number) - throw std::runtime_error("value is not number"); -#endif - return boost::lexical_cast(start_, end_ - start_); - } - - /// The boolean value. - bool b() const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (t() != type::True && t() != type::False) - throw std::runtime_error("value is not boolean"); -#endif - return t() == type::True; - } - - /// The string value. - detail::r_string s() const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (t() != type::String) - throw std::runtime_error("value is not string"); -#endif - unescape(); - return detail::r_string{start_, end_}; - } - - /// The list or object value - std::vector lo() - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (t() != type::Object && t() != type::List) - throw std::runtime_error("value is not a container"); -#endif - std::vector ret; - ret.reserve(lsize_); - for (uint32_t i = 0; i < lsize_; i++) - { - ret.emplace_back(l_[i]); - } - return ret; - } - - /// Convert escaped string character to their original form ("\\n" -> '\n'). - void unescape() const - { - if (*(start_ - 1)) - { - char* head = start_; - char* tail = start_; - while (head != end_) - { - if (*head == '\\') - { - switch (*++head) - { - case '"': *tail++ = '"'; break; - case '\\': *tail++ = '\\'; break; - case '/': *tail++ = '/'; break; - case 'b': *tail++ = '\b'; break; - case 'f': *tail++ = '\f'; break; - case 'n': *tail++ = '\n'; break; - case 'r': *tail++ = '\r'; break; - case 't': *tail++ = '\t'; break; - case 'u': - { - auto from_hex = [](char c) { - if (c >= 'a') - return c - 'a' + 10; - if (c >= 'A') - return c - 'A' + 10; - return c - '0'; - }; - unsigned int code = - (from_hex(head[1]) << 12) + - (from_hex(head[2]) << 8) + - (from_hex(head[3]) << 4) + - from_hex(head[4]); - if (code >= 0x800) - { - *tail++ = 0xE0 | (code >> 12); - *tail++ = 0x80 | ((code >> 6) & 0x3F); - *tail++ = 0x80 | (code & 0x3F); - } - else if (code >= 0x80) - { - *tail++ = 0xC0 | (code >> 6); - *tail++ = 0x80 | (code & 0x3F); - } - else - { - *tail++ = code; - } - head += 4; - } - break; - } - } - else - *tail++ = *head; - head++; - } - end_ = tail; - *end_ = 0; - *(start_ - 1) = 0; - } - } - - /// Check if the json object has the passed string as a key. - bool has(const char* str) const - { - return has(std::string(str)); - } - - bool has(const std::string& str) const - { - struct Pred - { - bool operator()(const rvalue& l, const rvalue& r) const - { - return l.key_ < r.key_; - }; - bool operator()(const rvalue& l, const std::string& r) const - { - return l.key_ < r; - }; - bool operator()(const std::string& l, const rvalue& r) const - { - return l < r.key_; - }; - }; - if (!is_cached()) - { - std::sort(begin(), end(), Pred()); - set_cached(); - } - auto it = lower_bound(begin(), end(), str, Pred()); - return it != end() && it->key_ == str; - } - - int count(const std::string& str) - { - return has(str) ? 1 : 0; - } - - rvalue* begin() const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (t() != type::Object && t() != type::List) - throw std::runtime_error("value is not a container"); -#endif - return l_.get(); - } - rvalue* end() const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (t() != type::Object && t() != type::List) - throw std::runtime_error("value is not a container"); -#endif - return l_.get() + lsize_; - } - - const detail::r_string& key() const - { - return key_; - } - - size_t size() const - { - if (t() == type::String) - return s().size(); -#ifndef CROW_JSON_NO_ERROR_CHECK - if (t() != type::Object && t() != type::List) - throw std::runtime_error("value is not a container"); -#endif - return lsize_; - } - - const rvalue& operator[](int index) const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (t() != type::List) - throw std::runtime_error("value is not a list"); - if (index >= static_cast(lsize_) || index < 0) - throw std::runtime_error("list out of bound"); -#endif - return l_[index]; - } - - const rvalue& operator[](size_t index) const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (t() != type::List) - throw std::runtime_error("value is not a list"); - if (index >= lsize_) - throw std::runtime_error("list out of bound"); -#endif - return l_[index]; - } - - const rvalue& operator[](const char* str) const - { - return this->operator[](std::string(str)); - } - - const rvalue& operator[](const std::string& str) const - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (t() != type::Object) - throw std::runtime_error("value is not an object"); -#endif - struct Pred - { - bool operator()(const rvalue& l, const rvalue& r) const - { - return l.key_ < r.key_; - }; - bool operator()(const rvalue& l, const std::string& r) const - { - return l.key_ < r; - }; - bool operator()(const std::string& l, const rvalue& r) const - { - return l < r.key_; - }; - }; - if (!is_cached()) - { - std::sort(begin(), end(), Pred()); - set_cached(); - } - auto it = lower_bound(begin(), end(), str, Pred()); - if (it != end() && it->key_ == str) - return *it; -#ifndef CROW_JSON_NO_ERROR_CHECK - throw std::runtime_error("cannot find key"); -#else - static rvalue nullValue; - return nullValue; -#endif - } - - void set_error() - { - option_ |= error_bit; - } - - bool error() const - { - return (option_ & error_bit) != 0; - } - - std::vector keys() - { -#ifndef CROW_JSON_NO_ERROR_CHECK - if (t() != type::Object) - throw std::runtime_error("value is not an object"); -#endif - std::vector ret; - ret.reserve(lsize_); - for (uint32_t i = 0; i < lsize_; i++) - { - ret.emplace_back(std::string(l_[i].key())); - } - return ret; - } - - private: - bool is_cached() const - { - return (option_ & cached_bit) != 0; - } - void set_cached() const - { - option_ |= cached_bit; - } - void copy_l(const rvalue& r) - { - if (r.t() != type::Object && r.t() != type::List) - return; - lsize_ = r.lsize_; - lremain_ = 0; - l_.reset(new rvalue[lsize_]); - std::copy(r.begin(), r.end(), begin()); - } - - void emplace_back(rvalue&& v) - { - if (!lremain_) - { - int new_size = lsize_ + lsize_; - if (new_size - lsize_ > 60000) - new_size = lsize_ + 60000; - if (new_size < 4) - new_size = 4; - rvalue* p = new rvalue[new_size]; - rvalue* p2 = p; - for (auto& x : *this) - *p2++ = std::move(x); - l_.reset(p); - lremain_ = new_size - lsize_; - } - l_[lsize_++] = std::move(v); - lremain_--; - } - - /// Determines num_type from the string. - void determine_num_type() - { - if (t_ != type::Number) - { - nt_ = num_type::Null; - return; - } - - const std::size_t len = end_ - start_; - const bool has_minus = std::memchr(start_, '-', len) != nullptr; - const bool has_e = std::memchr(start_, 'e', len) != nullptr || std::memchr(start_, 'E', len) != nullptr; - const bool has_dec_sep = std::memchr(start_, '.', len) != nullptr; - if (has_dec_sep || has_e) - nt_ = num_type::Floating_point; - else if (has_minus) - nt_ = num_type::Signed_integer; - else - nt_ = num_type::Unsigned_integer; - } - - mutable char* start_; - mutable char* end_; - detail::r_string key_; - std::unique_ptr l_; - uint32_t lsize_; - uint16_t lremain_; - type t_; - num_type nt_{num_type::Null}; - mutable uint8_t option_{0}; - - friend rvalue load_nocopy_internal(char* data, size_t size); - friend rvalue load(const char* data, size_t size); - friend std::ostream& operator<<(std::ostream& os, const rvalue& r) - { - switch (r.t_) - { - - case type::Null: os << "null"; break; - case type::False: os << "false"; break; - case type::True: os << "true"; break; - case type::Number: - { - switch (r.nt()) - { - case num_type::Floating_point: os << r.d(); break; - case num_type::Signed_integer: os << r.i(); break; - case num_type::Unsigned_integer: os << r.u(); break; - case num_type::Null: throw std::runtime_error("Number with num_type Null"); - } - } - break; - case type::String: os << '"' << r.s() << '"'; break; - case type::List: - { - os << '['; - bool first = true; - for (auto& x : r) - { - if (!first) - os << ','; - first = false; - os << x; - } - os << ']'; - } - break; - case type::Object: - { - os << '{'; - bool first = true; - for (auto& x : r) - { - if (!first) - os << ','; - os << '"' << escape(x.key_) << "\":"; - first = false; - os << x; - } - os << '}'; - } - break; - case type::Function: os << "custom function"; break; - } - return os; - } - }; - namespace detail - { - } - - inline bool operator==(const rvalue& l, const std::string& r) - { - return l.s() == r; - } - - inline bool operator==(const std::string& l, const rvalue& r) - { - return l == r.s(); - } - - inline bool operator!=(const rvalue& l, const std::string& r) - { - return l.s() != r; - } - - inline bool operator!=(const std::string& l, const rvalue& r) - { - return l != r.s(); - } - - inline bool operator==(const rvalue& l, double r) - { - return l.d() == r; - } - - inline bool operator==(double l, const rvalue& r) - { - return l == r.d(); - } - - inline bool operator!=(const rvalue& l, double r) - { - return l.d() != r; - } - - inline bool operator!=(double l, const rvalue& r) - { - return l != r.d(); - } - - - inline rvalue load_nocopy_internal(char* data, size_t size) - { - // Defend against excessive recursion - static constexpr unsigned max_depth = 10000; - - //static const char* escaped = "\"\\/\b\f\n\r\t"; - struct Parser - { - Parser(char* data, size_t /*size*/): - data(data) - { - } - - bool consume(char c) - { - if (CROW_UNLIKELY(*data != c)) - return false; - data++; - return true; - } - - void ws_skip() - { - while (*data == ' ' || *data == '\t' || *data == '\r' || *data == '\n') - ++data; - }; - - rvalue decode_string() - { - if (CROW_UNLIKELY(!consume('"'))) - return {}; - char* start = data; - uint8_t has_escaping = 0; - while (1) - { - if (CROW_LIKELY(*data != '"' && *data != '\\' && *data != '\0')) - { - data++; - } - else if (*data == '"') - { - *data = 0; - *(start - 1) = has_escaping; - data++; - return {type::String, start, data - 1}; - } - else if (*data == '\\') - { - has_escaping = 1; - data++; - switch (*data) - { - case 'u': - { - auto check = [](char c) { - return ('0' <= c && c <= '9') || - ('a' <= c && c <= 'f') || - ('A' <= c && c <= 'F'); - }; - if (!(check(*(data + 1)) && - check(*(data + 2)) && - check(*(data + 3)) && - check(*(data + 4)))) - return {}; - } - data += 5; - break; - case '"': - case '\\': - case '/': - case 'b': - case 'f': - case 'n': - case 'r': - case 't': - data++; - break; - default: - return {}; - } - } - else - return {}; - } - return {}; - } - - rvalue decode_list(unsigned depth) - { - rvalue ret(type::List); - if (CROW_UNLIKELY(!consume('[')) || CROW_UNLIKELY(depth > max_depth)) - { - ret.set_error(); - return ret; - } - ws_skip(); - if (CROW_UNLIKELY(*data == ']')) - { - data++; - return ret; - } - - while (1) - { - auto v = decode_value(depth + 1); - if (CROW_UNLIKELY(!v)) - { - ret.set_error(); - break; - } - ws_skip(); - ret.emplace_back(std::move(v)); - if (*data == ']') - { - data++; - break; - } - if (CROW_UNLIKELY(!consume(','))) - { - ret.set_error(); - break; - } - ws_skip(); - } - return ret; - } - - rvalue decode_number() - { - char* start = data; - - enum NumberParsingState - { - Minus, - AfterMinus, - ZeroFirst, - Digits, - DigitsAfterPoints, - E, - DigitsAfterE, - Invalid, - } state{Minus}; - while (CROW_LIKELY(state != Invalid)) - { - switch (*data) - { - case '0': - state = static_cast("\2\2\7\3\4\6\6"[state]); - /*if (state == NumberParsingState::Minus || state == NumberParsingState::AfterMinus) - { - state = NumberParsingState::ZeroFirst; - } - else if (state == NumberParsingState::Digits || - state == NumberParsingState::DigitsAfterE || - state == NumberParsingState::DigitsAfterPoints) - { - // ok; pass - } - else if (state == NumberParsingState::E) - { - state = NumberParsingState::DigitsAfterE; - } - else - return {};*/ - break; - case '1': - case '2': - case '3': - case '4': - case '5': - case '6': - case '7': - case '8': - case '9': - state = static_cast("\3\3\7\3\4\6\6"[state]); - while (*(data + 1) >= '0' && *(data + 1) <= '9') - data++; - /*if (state == NumberParsingState::Minus || state == NumberParsingState::AfterMinus) - { - state = NumberParsingState::Digits; - } - else if (state == NumberParsingState::Digits || - state == NumberParsingState::DigitsAfterE || - state == NumberParsingState::DigitsAfterPoints) - { - // ok; pass - } - else if (state == NumberParsingState::E) - { - state = NumberParsingState::DigitsAfterE; - } - else - return {};*/ - break; - case '.': - state = static_cast("\7\7\4\4\7\7\7"[state]); - /* - if (state == NumberParsingState::Digits || state == NumberParsingState::ZeroFirst) - { - state = NumberParsingState::DigitsAfterPoints; - } - else - return {}; - */ - break; - case '-': - state = static_cast("\1\7\7\7\7\6\7"[state]); - /*if (state == NumberParsingState::Minus) - { - state = NumberParsingState::AfterMinus; - } - else if (state == NumberParsingState::E) - { - state = NumberParsingState::DigitsAfterE; - } - else - return {};*/ - break; - case '+': - state = static_cast("\7\7\7\7\7\6\7"[state]); - /*if (state == NumberParsingState::E) - { - state = NumberParsingState::DigitsAfterE; - } - else - return {};*/ - break; - case 'e': - case 'E': - state = static_cast("\7\7\7\5\5\7\7"[state]); - /*if (state == NumberParsingState::Digits || - state == NumberParsingState::DigitsAfterPoints) - { - state = NumberParsingState::E; - } - else - return {};*/ - break; - default: - if (CROW_LIKELY(state == NumberParsingState::ZeroFirst || - state == NumberParsingState::Digits || - state == NumberParsingState::DigitsAfterPoints || - state == NumberParsingState::DigitsAfterE)) - return {type::Number, start, data}; - else - return {}; - } - data++; - } - - return {}; - } - - - rvalue decode_value(unsigned depth) - { - switch (*data) - { - case '[': - return decode_list(depth + 1); - case '{': - return decode_object(depth + 1); - case '"': - return decode_string(); - case 't': - if ( //e-data >= 4 && - data[1] == 'r' && - data[2] == 'u' && - data[3] == 'e') - { - data += 4; - return {type::True}; - } - else - return {}; - case 'f': - if ( //e-data >= 5 && - data[1] == 'a' && - data[2] == 'l' && - data[3] == 's' && - data[4] == 'e') - { - data += 5; - return {type::False}; - } - else - return {}; - case 'n': - if ( //e-data >= 4 && - data[1] == 'u' && - data[2] == 'l' && - data[3] == 'l') - { - data += 4; - return {type::Null}; - } - else - return {}; - //case '1': case '2': case '3': - //case '4': case '5': case '6': - //case '7': case '8': case '9': - //case '0': case '-': - default: - return decode_number(); - } - return {}; - } - - rvalue decode_object(unsigned depth) - { - rvalue ret(type::Object); - if (CROW_UNLIKELY(!consume('{')) || CROW_UNLIKELY(depth > max_depth)) - { - ret.set_error(); - return ret; - } - - ws_skip(); - - if (CROW_UNLIKELY(*data == '}')) - { - data++; - return ret; - } - - while (1) - { - auto t = decode_string(); - if (CROW_UNLIKELY(!t)) - { - ret.set_error(); - break; - } - - ws_skip(); - if (CROW_UNLIKELY(!consume(':'))) - { - ret.set_error(); - break; - } - - // TODO(ipkn) caching key to speed up (flyweight?) - // I have no idea how flyweight could apply here, but maybe some speedup can happen if we stopped checking type since decode_string returns a string anyway - auto key = t.s(); - - ws_skip(); - auto v = decode_value(depth + 1); - if (CROW_UNLIKELY(!v)) - { - ret.set_error(); - break; - } - ws_skip(); - - v.key_ = std::move(key); - ret.emplace_back(std::move(v)); - if (CROW_UNLIKELY(*data == '}')) - { - data++; - break; - } - if (CROW_UNLIKELY(!consume(','))) - { - ret.set_error(); - break; - } - ws_skip(); - } - return ret; - } - - rvalue parse() - { - ws_skip(); - auto ret = decode_value(0); // or decode object? - ws_skip(); - if (ret && *data != '\0') - ret.set_error(); - return ret; - } - - char* data; - }; - return Parser(data, size).parse(); - } - inline rvalue load(const char* data, size_t size) - { - char* s = new char[size + 1]; - memcpy(s, data, size); - s[size] = 0; - auto ret = load_nocopy_internal(s, size); - if (ret) - ret.key_.force(s, size); - else - delete[] s; - return ret; - } - - inline rvalue load(const char* data) - { - return load(data, strlen(data)); - } - - inline rvalue load(const std::string& str) - { - return load(str.data(), str.size()); - } - - - /// JSON write value. - - /// - /// Value can mean any json value, including a JSON object.
- /// Write means this class is used to primarily assemble JSON objects using keys and values and export those into a string. - class wvalue : public returnable - { - friend class crow::mustache::template_t; - - public: - using object = -#ifdef CROW_JSON_USE_MAP - std::map; -#else - std::unordered_map; -#endif - - using list = std::vector; - - type t() const { return t_; } - - private: - type t_{type::Null}; ///< The type of the value. - num_type nt{num_type::Null}; ///< The specific type of the number if \ref t_ is a number. - union number - { - double d; - int64_t si; - uint64_t ui; - - public: - constexpr number() noexcept: - ui() {} /* default constructor initializes unsigned integer. */ - constexpr number(std::uint64_t value) noexcept: - ui(value) {} - constexpr number(std::int64_t value) noexcept: - si(value) {} - constexpr number(double value) noexcept: - d(value) {} - } num; ///< Value if type is a number. - std::string s; ///< Value if type is a string. - std::unique_ptr l; ///< Value if type is a list. - std::unique_ptr o; ///< Value if type is a JSON object. - std::function f; ///< Value if type is a function (C++ lambda) - - public: - wvalue(): - returnable("application/json") {} - - wvalue(std::nullptr_t): - returnable("application/json"), t_(type::Null) {} - - wvalue(bool value): - returnable("application/json"), t_(value ? type::True : type::False) {} - - wvalue(std::uint8_t value): - returnable("application/json"), t_(type::Number), nt(num_type::Unsigned_integer), num(static_cast(value)) {} - wvalue(std::uint16_t value): - returnable("application/json"), t_(type::Number), nt(num_type::Unsigned_integer), num(static_cast(value)) {} - wvalue(std::uint32_t value): - returnable("application/json"), t_(type::Number), nt(num_type::Unsigned_integer), num(static_cast(value)) {} - wvalue(std::uint64_t value): - returnable("application/json"), t_(type::Number), nt(num_type::Unsigned_integer), num(static_cast(value)) {} - - wvalue(std::int8_t value): - returnable("application/json"), t_(type::Number), nt(num_type::Signed_integer), num(static_cast(value)) {} - wvalue(std::int16_t value): - returnable("application/json"), t_(type::Number), nt(num_type::Signed_integer), num(static_cast(value)) {} - wvalue(std::int32_t value): - returnable("application/json"), t_(type::Number), nt(num_type::Signed_integer), num(static_cast(value)) {} - wvalue(std::int64_t value): - returnable("application/json"), t_(type::Number), nt(num_type::Signed_integer), num(static_cast(value)) {} - - wvalue(float value): - returnable("application/json"), t_(type::Number), nt(num_type::Floating_point), num(static_cast(value)) {} - wvalue(double value): - returnable("application/json"), t_(type::Number), nt(num_type::Floating_point), num(static_cast(value)) {} - - wvalue(char const* value): - returnable("application/json"), t_(type::String), s(value) {} - - wvalue(std::string const& value): - returnable("application/json"), t_(type::String), s(value) {} - wvalue(std::string&& value): - returnable("application/json"), t_(type::String), s(std::move(value)) {} - - wvalue(std::initializer_list> initializer_list): - returnable("application/json"), t_(type::Object), o(new object(initializer_list)) {} - - wvalue(object const& value): - returnable("application/json"), t_(type::Object), o(new object(value)) {} - wvalue(object&& value): - returnable("application/json"), t_(type::Object), o(new object(std::move(value))) {} - - wvalue(const list& r): - returnable("application/json") - { - t_ = type::List; - l = std::unique_ptr(new list{}); - l->reserve(r.size()); - for (auto it = r.begin(); it != r.end(); ++it) - l->emplace_back(*it); - } - wvalue(list& r): - returnable("application/json") - { - t_ = type::List; - l = std::unique_ptr(new list{}); - l->reserve(r.size()); - for (auto it = r.begin(); it != r.end(); ++it) - l->emplace_back(*it); - } - - /// Create a write value from a read value (useful for editing JSON strings). - wvalue(const rvalue& r): - returnable("application/json") - { - t_ = r.t(); - switch (r.t()) - { - case type::Null: - case type::False: - case type::True: - case type::Function: - return; - case type::Number: - nt = r.nt(); - if (nt == num_type::Floating_point) - num.d = r.d(); - else if (nt == num_type::Signed_integer) - num.si = r.i(); - else - num.ui = r.u(); - return; - case type::String: - s = r.s(); - return; - case type::List: - l = std::unique_ptr(new list{}); - l->reserve(r.size()); - for (auto it = r.begin(); it != r.end(); ++it) - l->emplace_back(*it); - return; - case type::Object: - o = std::unique_ptr(new object{}); - for (auto it = r.begin(); it != r.end(); ++it) - o->emplace(it->key(), *it); - return; - } - } - - wvalue(const wvalue& r): - returnable("application/json") - { - t_ = r.t(); - switch (r.t()) - { - case type::Null: - case type::False: - case type::True: - return; - case type::Number: - nt = r.nt; - if (nt == num_type::Floating_point) - num.d = r.num.d; - else if (nt == num_type::Signed_integer) - num.si = r.num.si; - else - num.ui = r.num.ui; - return; - case type::String: - s = r.s; - return; - case type::List: - l = std::unique_ptr(new list{}); - l->reserve(r.size()); - for (auto it = r.l->begin(); it != r.l->end(); ++it) - l->emplace_back(*it); - return; - case type::Object: - o = std::unique_ptr(new object{}); - o->insert(r.o->begin(), r.o->end()); - return; - case type::Function: - f = r.f; - } - } - - wvalue(wvalue&& r): - returnable("application/json") - { - *this = std::move(r); - } - - wvalue& operator=(wvalue&& r) - { - t_ = r.t_; - num = r.num; - s = std::move(r.s); - l = std::move(r.l); - o = std::move(r.o); - return *this; - } - - /// Used for compatibility, same as \ref reset() - void clear() - { - reset(); - } - - void reset() - { - t_ = type::Null; - l.reset(); - o.reset(); - } - - wvalue& operator=(std::nullptr_t) - { - reset(); - return *this; - } - wvalue& operator=(bool value) - { - reset(); - if (value) - t_ = type::True; - else - t_ = type::False; - return *this; - } - - wvalue& operator=(double value) - { - reset(); - t_ = type::Number; - num.d = value; - nt = num_type::Floating_point; - return *this; - } - - wvalue& operator=(unsigned short value) - { - reset(); - t_ = type::Number; - num.ui = value; - nt = num_type::Unsigned_integer; - return *this; - } - - wvalue& operator=(short value) - { - reset(); - t_ = type::Number; - num.si = value; - nt = num_type::Signed_integer; - return *this; - } - - wvalue& operator=(long long value) - { - reset(); - t_ = type::Number; - num.si = value; - nt = num_type::Signed_integer; - return *this; - } - - wvalue& operator=(long value) - { - reset(); - t_ = type::Number; - num.si = value; - nt = num_type::Signed_integer; - return *this; - } - - wvalue& operator=(int value) - { - reset(); - t_ = type::Number; - num.si = value; - nt = num_type::Signed_integer; - return *this; - } - - wvalue& operator=(unsigned long long value) - { - reset(); - t_ = type::Number; - num.ui = value; - nt = num_type::Unsigned_integer; - return *this; - } - - wvalue& operator=(unsigned long value) - { - reset(); - t_ = type::Number; - num.ui = value; - nt = num_type::Unsigned_integer; - return *this; - } - - wvalue& operator=(unsigned int value) - { - reset(); - t_ = type::Number; - num.ui = value; - nt = num_type::Unsigned_integer; - return *this; - } - - wvalue& operator=(const char* str) - { - reset(); - t_ = type::String; - s = str; - return *this; - } - - wvalue& operator=(const std::string& str) - { - reset(); - t_ = type::String; - s = str; - return *this; - } - - wvalue& operator=(list&& v) - { - if (t_ != type::List) - reset(); - t_ = type::List; - if (!l) - l = std::unique_ptr(new list{}); - l->clear(); - l->resize(v.size()); - size_t idx = 0; - for (auto& x : v) - { - (*l)[idx++] = std::move(x); - } - return *this; - } - - template - wvalue& operator=(const std::vector& v) - { - if (t_ != type::List) - reset(); - t_ = type::List; - if (!l) - l = std::unique_ptr(new list{}); - l->clear(); - l->resize(v.size()); - size_t idx = 0; - for (auto& x : v) - { - (*l)[idx++] = x; - } - return *this; - } - - wvalue& operator=(std::initializer_list> initializer_list) - { - if (t_ != type::Object) - { - reset(); - t_ = type::Object; - o = std::unique_ptr(new object(initializer_list)); - } - else - { -#if defined(__APPLE__) || defined(__MACH__) - o = std::unique_ptr(new object(initializer_list)); -#else - (*o) = initializer_list; -#endif - } - return *this; - } - - wvalue& operator=(object const& value) - { - if (t_ != type::Object) - { - reset(); - t_ = type::Object; - o = std::unique_ptr(new object(value)); - } - else - { -#if defined(__APPLE__) || defined(__MACH__) - o = std::unique_ptr(new object(value)); -#else - (*o) = value; -#endif - } - return *this; - } - - wvalue& operator=(object&& value) - { - if (t_ != type::Object) - { - reset(); - t_ = type::Object; - o = std::unique_ptr(new object(std::move(value))); - } - else - { - (*o) = std::move(value); - } - return *this; - } - - wvalue& operator=(std::function&& func) - { - reset(); - t_ = type::Function; - f = std::move(func); - return *this; - } - - wvalue& operator[](unsigned index) - { - if (t_ != type::List) - reset(); - t_ = type::List; - if (!l) - l = std::unique_ptr(new list{}); - if (l->size() < index + 1) - l->resize(index + 1); - return (*l)[index]; - } - - int count(const std::string& str) - { - if (t_ != type::Object) - return 0; - if (!o) - return 0; - return o->count(str); - } - - wvalue& operator[](const std::string& str) - { - if (t_ != type::Object) - reset(); - t_ = type::Object; - if (!o) - o = std::unique_ptr(new object{}); - return (*o)[str]; - } - - std::vector keys() const - { - if (t_ != type::Object) - return {}; - std::vector result; - for (auto& kv : *o) - { - result.push_back(kv.first); - } - return result; - } - - std::string execute(std::string txt = "") const //Not using reference because it cannot be used with a default rvalue - { - if (t_ != type::Function) - return ""; - return f(txt); - } - - /// If the wvalue is a list, it returns the length of the list, otherwise it returns 1. - std::size_t size() const - { - if (t_ != type::List) - return 1; - return l->size(); - } - - /// Returns an estimated size of the value in bytes. - size_t estimate_length() const - { - switch (t_) - { - case type::Null: return 4; - case type::False: return 5; - case type::True: return 4; - case type::Number: return 30; - case type::String: return 2 + s.size() + s.size() / 2; - case type::List: - { - size_t sum{}; - if (l) - { - for (auto& x : *l) - { - sum += 1; - sum += x.estimate_length(); - } - } - return sum + 2; - } - case type::Object: - { - size_t sum{}; - if (o) - { - for (auto& kv : *o) - { - sum += 2; - sum += 2 + kv.first.size() + kv.first.size() / 2; - sum += kv.second.estimate_length(); - } - } - return sum + 2; - } - case type::Function: - return 0; - } - return 1; - } - - private: - inline void dump_string(const std::string& str, std::string& out) const - { - out.push_back('"'); - escape(str, out); - out.push_back('"'); - } - - inline void dump_internal(const wvalue& v, std::string& out) const - { - switch (v.t_) - { - case type::Null: out += "null"; break; - case type::False: out += "false"; break; - case type::True: out += "true"; break; - case type::Number: - { - if (v.nt == num_type::Floating_point) - { - if (isnan(v.num.d) || isinf(v.num.d)) - { - out += "null"; - CROW_LOG_WARNING << "Invalid JSON value detected (" << v.num.d << "), value set to null"; - break; - } -#ifdef _MSC_VER -#define MSC_COMPATIBLE_SPRINTF(BUFFER_PTR, FORMAT_PTR, VALUE) sprintf_s((BUFFER_PTR), 128, (FORMAT_PTR), (VALUE)) -#else -#define MSC_COMPATIBLE_SPRINTF(BUFFER_PTR, FORMAT_PTR, VALUE) sprintf((BUFFER_PTR), (FORMAT_PTR), (VALUE)) -#endif - enum - { - start, - decp, - zero - } f_state; - char outbuf[128]; - MSC_COMPATIBLE_SPRINTF(outbuf, "%f", v.num.d); - char *p = &outbuf[0], *o = nullptr; - f_state = start; - while (*p != '\0') - { - //std::cout << *p << std::endl; - char ch = *p; - switch (f_state) - { - case start: - if (ch == '.') - { - if (p + 1 && *(p + 1) == '0') p++; - f_state = decp; - } - p++; - break; - case decp: - if (ch == '0') - { - f_state = zero; - o = p; - } - p++; - break; - case zero: - if (ch != '0') - { - o = nullptr; - f_state = decp; - } - p++; - break; - } - } - if (o != nullptr) - *o = '\0'; - out += outbuf; -#undef MSC_COMPATIBLE_SPRINTF - } - else if (v.nt == num_type::Signed_integer) - { - out += std::to_string(v.num.si); - } - else - { - out += std::to_string(v.num.ui); - } - } - break; - case type::String: dump_string(v.s, out); break; - case type::List: - { - out.push_back('['); - if (v.l) - { - bool first = true; - for (auto& x : *v.l) - { - if (!first) - { - out.push_back(','); - } - first = false; - dump_internal(x, out); - } - } - out.push_back(']'); - } - break; - case type::Object: - { - out.push_back('{'); - if (v.o) - { - bool first = true; - for (auto& kv : *v.o) - { - if (!first) - { - out.push_back(','); - } - first = false; - dump_string(kv.first, out); - out.push_back(':'); - dump_internal(kv.second, out); - } - } - out.push_back('}'); - } - break; - - case type::Function: - out += "custom function"; - break; - } - } - - public: - std::string dump() const - { - std::string ret; - ret.reserve(estimate_length()); - dump_internal(*this, ret); - return ret; - } - }; - - - - //std::vector dump_ref(wvalue& v) - //{ - //} - } // namespace json -} // namespace crow - - - -#pragma once -#include -#include -#include -#include -#include - - - - - - - - - -namespace crow -{ - namespace mustache - { - using context = json::wvalue; - - template_t load(const std::string& filename); - - class invalid_template_exception : public std::exception - { - public: - invalid_template_exception(const std::string& msg): - msg("crow::mustache error: " + msg) - {} - virtual const char* what() const throw() - { - return msg.c_str(); - } - std::string msg; - }; - - struct rendered_template : returnable - { - rendered_template(): - returnable("text/html") {} - - rendered_template(std::string& body): - returnable("text/html"), body_(std::move(body)) {} - - std::string body_; - - std::string dump() const override - { - return body_; - } - }; - - enum class ActionType - { - Ignore, - Tag, - UnescapeTag, - OpenBlock, - CloseBlock, - ElseBlock, - Partial, - }; - - struct Action - { - int start; - int end; - int pos; - ActionType t; - Action(ActionType t, size_t start, size_t end, size_t pos = 0): - start(static_cast(start)), end(static_cast(end)), pos(static_cast(pos)), t(t) - { - } - }; - - /// A mustache template object. - class template_t - { - public: - template_t(std::string body): - body_(std::move(body)) - { - // {{ {{# {{/ {{^ {{! {{> {{= - parse(); - } - - private: - std::string tag_name(const Action& action) const - { - return body_.substr(action.start, action.end - action.start); - } - auto find_context(const std::string& name, const std::vector& stack, bool shouldUseOnlyFirstStackValue = false) const -> std::pair - { - if (name == ".") - { - return {true, *stack.back()}; - } - static json::wvalue empty_str; - empty_str = ""; - - int dotPosition = name.find("."); - if (dotPosition == static_cast(name.npos)) - { - for (auto it = stack.rbegin(); it != stack.rend(); ++it) - { - if ((*it)->t() == json::type::Object) - { - if ((*it)->count(name)) - return {true, (**it)[name]}; - } - } - } - else - { - std::vector dotPositions; - dotPositions.push_back(-1); - while (dotPosition != static_cast(name.npos)) - { - dotPositions.push_back(dotPosition); - dotPosition = name.find(".", dotPosition + 1); - } - dotPositions.push_back(name.size()); - std::vector names; - names.reserve(dotPositions.size() - 1); - for (int i = 1; i < static_cast(dotPositions.size()); i++) - names.emplace_back(name.substr(dotPositions[i - 1] + 1, dotPositions[i] - dotPositions[i - 1] - 1)); - - for (auto it = stack.rbegin(); it != stack.rend(); ++it) - { - context* view = *it; - bool found = true; - for (auto jt = names.begin(); jt != names.end(); ++jt) - { - if (view->t() == json::type::Object && - view->count(*jt)) - { - view = &(*view)[*jt]; - } - else - { - if (shouldUseOnlyFirstStackValue) - { - return {false, empty_str}; - } - found = false; - break; - } - } - if (found) - return {true, *view}; - } - } - - return {false, empty_str}; - } - - void escape(const std::string& in, std::string& out) const - { - out.reserve(out.size() + in.size()); - for (auto it = in.begin(); it != in.end(); ++it) - { - switch (*it) - { - case '&': out += "&"; break; - case '<': out += "<"; break; - case '>': out += ">"; break; - case '"': out += """; break; - case '\'': out += "'"; break; - case '/': out += "/"; break; - case '`': out += "`"; break; - case '=': out += "="; break; - default: out += *it; break; - } - } - } - - bool isTagInsideObjectBlock(const int& current, const std::vector& stack) const - { - int openedBlock = 0; - int totalBlocksBefore = 0; - for (int i = current; i > 0; --i) - { - ++totalBlocksBefore; - auto& action = actions_[i - 1]; - - if (action.t == ActionType::OpenBlock) - { - if (openedBlock == 0 && (*stack.rbegin())->t() == json::type::Object) - { - return true; - } - --openedBlock; - } - else if (action.t == ActionType::CloseBlock) - { - ++openedBlock; - } - } - - return false; - } - - void render_internal(int actionBegin, int actionEnd, std::vector& stack, std::string& out, int indent) const - { - int current = actionBegin; - - if (indent) - out.insert(out.size(), indent, ' '); - - while (current < actionEnd) - { - auto& fragment = fragments_[current]; - auto& action = actions_[current]; - render_fragment(fragment, indent, out); - switch (action.t) - { - case ActionType::Ignore: - // do nothing - break; - case ActionType::Partial: - { - std::string partial_name = tag_name(action); - auto partial_templ = load(partial_name); - int partial_indent = action.pos; - partial_templ.render_internal(0, partial_templ.fragments_.size() - 1, stack, out, partial_indent ? indent + partial_indent : 0); - } - break; - case ActionType::UnescapeTag: - case ActionType::Tag: - { - bool shouldUseOnlyFirstStackValue = false; - if (isTagInsideObjectBlock(current, stack)) - { - shouldUseOnlyFirstStackValue = true; - } - auto optional_ctx = find_context(tag_name(action), stack, shouldUseOnlyFirstStackValue); - auto& ctx = optional_ctx.second; - switch (ctx.t()) - { - case json::type::Number: - out += ctx.dump(); - break; - case json::type::String: - if (action.t == ActionType::Tag) - escape(ctx.s, out); - else - out += ctx.s; - break; - case json::type::Function: - { - std::string execute_result = ctx.execute(); - while (execute_result.find("{{") != std::string::npos) - { - template_t result_plug(execute_result); - execute_result = result_plug.render_string(*(stack[0])); - } - - if (action.t == ActionType::Tag) - escape(execute_result, out); - else - out += execute_result; - } - break; - default: - throw std::runtime_error("not implemented tag type" + boost::lexical_cast(static_cast(ctx.t()))); - } - } - break; - case ActionType::ElseBlock: - { - static context nullContext; - auto optional_ctx = find_context(tag_name(action), stack); - if (!optional_ctx.first) - { - stack.emplace_back(&nullContext); - break; - } - - auto& ctx = optional_ctx.second; - switch (ctx.t()) - { - case json::type::List: - if (ctx.l && !ctx.l->empty()) - current = action.pos; - else - stack.emplace_back(&nullContext); - break; - case json::type::False: - case json::type::Null: - stack.emplace_back(&nullContext); - break; - default: - current = action.pos; - break; - } - break; - } - case ActionType::OpenBlock: - { - auto optional_ctx = find_context(tag_name(action), stack); - if (!optional_ctx.first) - { - current = action.pos; - break; - } - - auto& ctx = optional_ctx.second; - switch (ctx.t()) - { - case json::type::List: - if (ctx.l) - for (auto it = ctx.l->begin(); it != ctx.l->end(); ++it) - { - stack.push_back(&*it); - render_internal(current + 1, action.pos, stack, out, indent); - stack.pop_back(); - } - current = action.pos; - break; - case json::type::Number: - case json::type::String: - case json::type::Object: - case json::type::True: - stack.push_back(&ctx); - break; - case json::type::False: - case json::type::Null: - current = action.pos; - break; - default: - throw std::runtime_error("{{#: not implemented context type: " + boost::lexical_cast(static_cast(ctx.t()))); - break; - } - break; - } - case ActionType::CloseBlock: - stack.pop_back(); - break; - default: - throw std::runtime_error("not implemented " + boost::lexical_cast(static_cast(action.t))); - } - current++; - } - auto& fragment = fragments_[actionEnd]; - render_fragment(fragment, indent, out); - } - void render_fragment(const std::pair fragment, int indent, std::string& out) const - { - if (indent) - { - for (int i = fragment.first; i < fragment.second; i++) - { - out += body_[i]; - if (body_[i] == '\n' && i + 1 != static_cast(body_.size())) - out.insert(out.size(), indent, ' '); - } - } - else - out.insert(out.size(), body_, fragment.first, fragment.second - fragment.first); - } - - public: - /// Output a returnable template from this mustache template - rendered_template render() const - { - context empty_ctx; - std::vector stack; - stack.emplace_back(&empty_ctx); - - std::string ret; - render_internal(0, fragments_.size() - 1, stack, ret, 0); - return rendered_template(ret); - } - - /// Apply the values from the context provided and output a returnable template from this mustache template - rendered_template render(context& ctx) const - { - std::vector stack; - stack.emplace_back(&ctx); - - std::string ret; - render_internal(0, fragments_.size() - 1, stack, ret, 0); - return rendered_template(ret); - } - - /// Output a returnable template from this mustache template - std::string render_string() const - { - context empty_ctx; - std::vector stack; - stack.emplace_back(&empty_ctx); - - std::string ret; - render_internal(0, fragments_.size() - 1, stack, ret, 0); - return ret; - } - - /// Apply the values from the context provided and output a returnable template from this mustache template - std::string render_string(context& ctx) const - { - std::vector stack; - stack.emplace_back(&ctx); - - std::string ret; - render_internal(0, fragments_.size() - 1, stack, ret, 0); - return ret; - } - - private: - void parse() - { - std::string tag_open = "{{"; - std::string tag_close = "}}"; - - std::vector blockPositions; - - size_t current = 0; - while (1) - { - size_t idx = body_.find(tag_open, current); - if (idx == body_.npos) - { - fragments_.emplace_back(static_cast(current), static_cast(body_.size())); - actions_.emplace_back(ActionType::Ignore, 0, 0); - break; - } - fragments_.emplace_back(static_cast(current), static_cast(idx)); - - idx += tag_open.size(); - size_t endIdx = body_.find(tag_close, idx); - if (endIdx == idx) - { - throw invalid_template_exception("empty tag is not allowed"); - } - if (endIdx == body_.npos) - { - // error, no matching tag - throw invalid_template_exception("not matched opening tag"); - } - current = endIdx + tag_close.size(); - switch (body_[idx]) - { - case '#': - idx++; - while (body_[idx] == ' ') - idx++; - while (body_[endIdx - 1] == ' ') - endIdx--; - blockPositions.emplace_back(static_cast(actions_.size())); - actions_.emplace_back(ActionType::OpenBlock, idx, endIdx); - break; - case '/': - idx++; - while (body_[idx] == ' ') - idx++; - while (body_[endIdx - 1] == ' ') - endIdx--; - { - auto& matched = actions_[blockPositions.back()]; - if (body_.compare(idx, endIdx - idx, - body_, matched.start, matched.end - matched.start) != 0) - { - throw invalid_template_exception("not matched {{# {{/ pair: " + - body_.substr(matched.start, matched.end - matched.start) + ", " + - body_.substr(idx, endIdx - idx)); - } - matched.pos = actions_.size(); - } - actions_.emplace_back(ActionType::CloseBlock, idx, endIdx, blockPositions.back()); - blockPositions.pop_back(); - break; - case '^': - idx++; - while (body_[idx] == ' ') - idx++; - while (body_[endIdx - 1] == ' ') - endIdx--; - blockPositions.emplace_back(static_cast(actions_.size())); - actions_.emplace_back(ActionType::ElseBlock, idx, endIdx); - break; - case '!': - // do nothing action - actions_.emplace_back(ActionType::Ignore, idx + 1, endIdx); - break; - case '>': // partial - idx++; - while (body_[idx] == ' ') - idx++; - while (body_[endIdx - 1] == ' ') - endIdx--; - actions_.emplace_back(ActionType::Partial, idx, endIdx); - break; - case '{': - if (tag_open != "{{" || tag_close != "}}") - throw invalid_template_exception("cannot use triple mustache when delimiter changed"); - - idx++; - if (body_[endIdx + 2] != '}') - { - throw invalid_template_exception("{{{: }}} not matched"); - } - while (body_[idx] == ' ') - idx++; - while (body_[endIdx - 1] == ' ') - endIdx--; - actions_.emplace_back(ActionType::UnescapeTag, idx, endIdx); - current++; - break; - case '&': - idx++; - while (body_[idx] == ' ') - idx++; - while (body_[endIdx - 1] == ' ') - endIdx--; - actions_.emplace_back(ActionType::UnescapeTag, idx, endIdx); - break; - case '=': - // tag itself is no-op - idx++; - actions_.emplace_back(ActionType::Ignore, idx, endIdx); - endIdx--; - if (body_[endIdx] != '=') - throw invalid_template_exception("{{=: not matching = tag: " + body_.substr(idx, endIdx - idx)); - endIdx--; - while (body_[idx] == ' ') - idx++; - while (body_[endIdx] == ' ') - endIdx--; - endIdx++; - { - bool succeeded = false; - for (size_t i = idx; i < endIdx; i++) - { - if (body_[i] == ' ') - { - tag_open = body_.substr(idx, i - idx); - while (body_[i] == ' ') - i++; - tag_close = body_.substr(i, endIdx - i); - if (tag_open.empty()) - throw invalid_template_exception("{{=: empty open tag"); - if (tag_close.empty()) - throw invalid_template_exception("{{=: empty close tag"); - - if (tag_close.find(" ") != tag_close.npos) - throw invalid_template_exception("{{=: invalid open/close tag: " + tag_open + " " + tag_close); - succeeded = true; - break; - } - } - if (!succeeded) - throw invalid_template_exception("{{=: cannot find space between new open/close tags"); - } - break; - default: - // normal tag case; - while (body_[idx] == ' ') - idx++; - while (body_[endIdx - 1] == ' ') - endIdx--; - actions_.emplace_back(ActionType::Tag, idx, endIdx); - break; - } - } - - // removing standalones - for (int i = actions_.size() - 2; i >= 0; i--) - { - if (actions_[i].t == ActionType::Tag || actions_[i].t == ActionType::UnescapeTag) - continue; - auto& fragment_before = fragments_[i]; - auto& fragment_after = fragments_[i + 1]; - bool is_last_action = i == static_cast(actions_.size()) - 2; - bool all_space_before = true; - int j, k; - for (j = fragment_before.second - 1; j >= fragment_before.first; j--) - { - if (body_[j] != ' ') - { - all_space_before = false; - break; - } - } - if (all_space_before && i > 0) - continue; - if (!all_space_before && body_[j] != '\n') - continue; - bool all_space_after = true; - for (k = fragment_after.first; k < static_cast(body_.size()) && k < fragment_after.second; k++) - { - if (body_[k] != ' ') - { - all_space_after = false; - break; - } - } - if (all_space_after && !is_last_action) - continue; - if (!all_space_after && - !( - body_[k] == '\n' || - (body_[k] == '\r' && - k + 1 < static_cast(body_.size()) && - body_[k + 1] == '\n'))) - continue; - if (actions_[i].t == ActionType::Partial) - { - actions_[i].pos = fragment_before.second - j - 1; - } - fragment_before.second = j + 1; - if (!all_space_after) - { - if (body_[k] == '\n') - k++; - else - k += 2; - fragment_after.first = k; - } - } - } - - std::vector> fragments_; - std::vector actions_; - std::string body_; - }; - - inline template_t compile(const std::string& body) - { - return template_t(body); - } - namespace detail - { - inline std::string& get_template_base_directory_ref() - { - static std::string template_base_directory = "templates"; - return template_base_directory; - } - - /// A base directory not related to any blueprint - inline std::string& get_global_template_base_directory_ref() - { - static std::string template_base_directory = "templates"; - return template_base_directory; - } - } // namespace detail - - inline std::string default_loader(const std::string& filename) - { - std::string path = detail::get_template_base_directory_ref(); - if (!(path.back() == '/' || path.back() == '\\')) - path += '/'; - path += filename; - std::ifstream inf(path); - if (!inf) - { - CROW_LOG_WARNING << "Template \"" << filename << "\" not found."; - return {}; - } - return {std::istreambuf_iterator(inf), std::istreambuf_iterator()}; - } - - namespace detail - { - inline std::function& get_loader_ref() - { - static std::function loader = default_loader; - return loader; - } - } // namespace detail - - inline void set_base(const std::string& path) - { - auto& base = detail::get_template_base_directory_ref(); - base = path; - if (base.back() != '\\' && - base.back() != '/') - { - base += '/'; - } - } - - inline void set_global_base(const std::string& path) - { - auto& base = detail::get_global_template_base_directory_ref(); - base = path; - if (base.back() != '\\' && - base.back() != '/') - { - base += '/'; - } - } - - inline void set_loader(std::function loader) - { - detail::get_loader_ref() = std::move(loader); - } - - inline std::string load_text(const std::string& filename) - { - std::string filename_sanitized(filename); - utility::sanitize_filename(filename_sanitized); - return detail::get_loader_ref()(filename_sanitized); - } - - inline std::string load_text_unsafe(const std::string& filename) - { - return detail::get_loader_ref()(filename); - } - - inline template_t load(const std::string& filename) - { - std::string filename_sanitized(filename); - utility::sanitize_filename(filename_sanitized); - return compile(detail::get_loader_ref()(filename_sanitized)); - } - - inline template_t load_unsafe(const std::string& filename) - { - return compile(detail::get_loader_ref()(filename)); - } - } // namespace mustache -} // namespace crow - - - -#pragma once - -#include -#include -#include -#include -#include -#include -#include - - - - - - - - - - - - - - - - - - -namespace crow -{ - - constexpr const uint16_t INVALID_BP_ID{((uint16_t)-1)}; - - /// A base class for all rules. - - /// - /// Used to provide a common interface for code dealing with different types of rules.
- /// A Rule provides a URL, allowed HTTP methods, and handlers. - class BaseRule - { - public: - BaseRule(std::string rule): - rule_(std::move(rule)) - {} - - virtual ~BaseRule() - {} - - virtual void validate() = 0; - std::unique_ptr upgrade() - { - if (rule_to_upgrade_) - return std::move(rule_to_upgrade_); - return {}; - } - - virtual void handle(request&, response&, const routing_params&) = 0; - virtual void handle_upgrade(const request&, response& res, SocketAdaptor&&) - { - res = response(404); - res.end(); - } -#ifdef CROW_ENABLE_SSL - virtual void handle_upgrade(const request&, response& res, SSLAdaptor&&) - { - res = response(404); - res.end(); - } -#endif - - uint32_t get_methods() - { - return methods_; - } - - template - void foreach_method(F f) - { - for (uint32_t method = 0, method_bit = 1; method < static_cast(HTTPMethod::InternalMethodCount); method++, method_bit <<= 1) - { - if (methods_ & method_bit) - f(method); - } - } - - - std::string custom_templates_base; - - const std::string& rule() { return rule_; } - - protected: - uint32_t methods_{1 << static_cast(HTTPMethod::Get)}; - - std::string rule_; - std::string name_; - - std::unique_ptr rule_to_upgrade_; - - friend class Router; - friend class Blueprint; - template - friend struct RuleParameterTraits; - }; - - - namespace detail - { - namespace routing_handler_call_helper - { - template - struct call_pair - { - using type = T; - static const int pos = Pos; - }; - - template - struct call_params - { - H1& handler; - const routing_params& params; - request& req; - response& res; - }; - - template - struct call - {}; - - template - struct call, black_magic::S> - { - void operator()(F cparams) - { - using pushed = typename black_magic::S::template push_back>; - call, pushed>()(cparams); - } - }; - - template - struct call, black_magic::S> - { - void operator()(F cparams) - { - using pushed = typename black_magic::S::template push_back>; - call, pushed>()(cparams); - } - }; - - template - struct call, black_magic::S> - { - void operator()(F cparams) - { - using pushed = typename black_magic::S::template push_back>; - call, pushed>()(cparams); - } - }; - - template - struct call, black_magic::S> - { - void operator()(F cparams) - { - using pushed = typename black_magic::S::template push_back>; - call, pushed>()(cparams); - } - }; - - template - struct call, black_magic::S> - { - void operator()(F cparams) - { - cparams.handler( - cparams.req, - cparams.res, - cparams.params.template get(Args1::pos)...); - } - }; - - template - struct Wrapped - { - template - void set_(Func f, typename std::enable_if>::type, const request&>::value, int>::type = 0) - { - handler_ = ( -#ifdef CROW_CAN_USE_CPP14 - [f = std::move(f)] -#else - [f] -#endif - (const request&, response& res, Args... args) { - res = response(f(args...)); - res.end(); - }); - } - - template - struct req_handler_wrapper - { - req_handler_wrapper(Func f): - f(std::move(f)) - { - } - - void operator()(const request& req, response& res, Args... args) - { - res = response(f(req, args...)); - res.end(); - } - - Func f; - }; - - template - void set_(Func f, typename std::enable_if< - std::is_same>::type, const request&>::value && - !std::is_same>::type, response&>::value, - int>::type = 0) - { - handler_ = req_handler_wrapper(std::move(f)); - /*handler_ = ( - [f = std::move(f)] - (const request& req, response& res, Args... args){ - res = response(f(req, args...)); - res.end(); - });*/ - } - - template - void set_(Func f, typename std::enable_if< - std::is_same>::type, const request&>::value && - std::is_same>::type, response&>::value, - int>::type = 0) - { - handler_ = std::move(f); - } - - template - struct handler_type_helper - { - using type = std::function; - using args_type = black_magic::S...>; - }; - - template - struct handler_type_helper - { - using type = std::function; - using args_type = black_magic::S...>; - }; - - template - struct handler_type_helper - { - using type = std::function; - using args_type = black_magic::S...>; - }; - - typename handler_type_helper::type handler_; - - void operator()(request& req, response& res, const routing_params& params) - { - detail::routing_handler_call_helper::call< - detail::routing_handler_call_helper::call_params< - decltype(handler_)>, - 0, 0, 0, 0, - typename handler_type_helper::args_type, - black_magic::S<>>()( - detail::routing_handler_call_helper::call_params< - decltype(handler_)>{handler_, params, req, res}); - } - }; - - } // namespace routing_handler_call_helper - } // namespace detail - - - class CatchallRule - { - public: - /// @cond SKIP - CatchallRule() {} - - template - typename std::enable_if>::value, void>::type - operator()(Func&& f) - { - static_assert(!std::is_same::value, - "Handler function cannot have void return type; valid return types: string, int, crow::response, crow::returnable"); - - handler_ = ( -#ifdef CROW_CAN_USE_CPP14 - [f = std::move(f)] -#else - [f] -#endif - (const request&, response& res) { - res = response(f()); - res.end(); - }); - } - - template - typename std::enable_if< - !black_magic::CallHelper>::value && - black_magic::CallHelper>::value, - void>::type - operator()(Func&& f) - { - static_assert(!std::is_same()))>::value, - "Handler function cannot have void return type; valid return types: string, int, crow::response, crow::returnable"); - - handler_ = ( -#ifdef CROW_CAN_USE_CPP14 - [f = std::move(f)] -#else - [f] -#endif - (const crow::request& req, crow::response& res) { - res = response(f(req)); - res.end(); - }); - } - - template - typename std::enable_if< - !black_magic::CallHelper>::value && - !black_magic::CallHelper>::value && - black_magic::CallHelper>::value, - void>::type - operator()(Func&& f) - { - static_assert(std::is_same()))>::value, - "Handler function with response argument should have void return type"); - handler_ = ( -#ifdef CROW_CAN_USE_CPP14 - [f = std::move(f)] -#else - [f] -#endif - (const crow::request&, crow::response& res) { - f(res); - }); - } - - template - typename std::enable_if< - !black_magic::CallHelper>::value && - !black_magic::CallHelper>::value && - !black_magic::CallHelper>::value, - void>::type - operator()(Func&& f) - { - static_assert(std::is_same(), std::declval()))>::value, - "Handler function with response argument should have void return type"); - - handler_ = std::move(f); - } - /// @endcond - bool has_handler() - { - return (handler_ != nullptr); - } - - protected: - friend class Router; - - private: - std::function handler_; - }; - - - /// A rule dealing with websockets. - - /// - /// Provides the interface for the user to put in the necessary handlers for a websocket to work. - class WebSocketRule : public BaseRule - { - using self_t = WebSocketRule; - - public: - WebSocketRule(std::string rule): - BaseRule(std::move(rule)) - {} - - void validate() override - {} - - void handle(request&, response& res, const routing_params&) override - { - res = response(404); - res.end(); - } - - void handle_upgrade(const request& req, response&, SocketAdaptor&& adaptor) override - { - new crow::websocket::Connection(req, std::move(adaptor), open_handler_, message_handler_, close_handler_, error_handler_, accept_handler_); - } -#ifdef CROW_ENABLE_SSL - void handle_upgrade(const request& req, response&, SSLAdaptor&& adaptor) override - { - new crow::websocket::Connection(req, std::move(adaptor), open_handler_, message_handler_, close_handler_, error_handler_, accept_handler_); - } -#endif - - template - self_t& onopen(Func f) - { - open_handler_ = f; - return *this; - } - - template - self_t& onmessage(Func f) - { - message_handler_ = f; - return *this; - } - - template - self_t& onclose(Func f) - { - close_handler_ = f; - return *this; - } - - template - self_t& onerror(Func f) - { - error_handler_ = f; - return *this; - } - - template - self_t& onaccept(Func f) - { - accept_handler_ = f; - return *this; - } - - protected: - std::function open_handler_; - std::function message_handler_; - std::function close_handler_; - std::function error_handler_; - std::function accept_handler_; - }; - - /// Allows the user to assign parameters using functions. - - /// - /// `rule.name("name").methods(HTTPMethod::POST)` - template - struct RuleParameterTraits - { - using self_t = T; - WebSocketRule& websocket() - { - auto p = new WebSocketRule(static_cast(this)->rule_); - static_cast(this)->rule_to_upgrade_.reset(p); - return *p; - } - - self_t& name(std::string name) noexcept - { - static_cast(this)->name_ = std::move(name); - return static_cast(*this); - } - - self_t& methods(HTTPMethod method) - { - static_cast(this)->methods_ = 1 << static_cast(method); - return static_cast(*this); - } - - template - self_t& methods(HTTPMethod method, MethodArgs... args_method) - { - methods(args_method...); - static_cast(this)->methods_ |= 1 << static_cast(method); - return static_cast(*this); - } - }; - - /// A rule that can change its parameters during runtime. - class DynamicRule : public BaseRule, public RuleParameterTraits - { - public: - DynamicRule(std::string rule): - BaseRule(std::move(rule)) - {} - - void validate() override - { - if (!erased_handler_) - { - throw std::runtime_error(name_ + (!name_.empty() ? ": " : "") + "no handler for url " + rule_); - } - } - - void handle(request& req, response& res, const routing_params& params) override - { - if (!custom_templates_base.empty()) - mustache::set_base(custom_templates_base); - else if (mustache::detail::get_template_base_directory_ref() != "templates") - mustache::set_base("templates"); - erased_handler_(req, res, params); - } - - template - void operator()(Func f) - { -#ifdef CROW_MSVC_WORKAROUND - using function_t = utility::function_traits; -#else - using function_t = utility::function_traits; -#endif - erased_handler_ = wrap(std::move(f), black_magic::gen_seq()); - } - - // enable_if Arg1 == request && Arg2 == response - // enable_if Arg1 == request && Arg2 != resposne - // enable_if Arg1 != request -#ifdef CROW_MSVC_WORKAROUND - template -#else - template -#endif - std::function - wrap(Func f, black_magic::seq) - { -#ifdef CROW_MSVC_WORKAROUND - using function_t = utility::function_traits; -#else - using function_t = utility::function_traits; -#endif - if (!black_magic::is_parameter_tag_compatible( - black_magic::get_parameter_tag_runtime(rule_.c_str()), - black_magic::compute_parameter_tag_from_args_list< - typename function_t::template arg...>::value)) - { - throw std::runtime_error("route_dynamic: Handler type is mismatched with URL parameters: " + rule_); - } - auto ret = detail::routing_handler_call_helper::Wrapped...>(); - ret.template set_< - typename function_t::template arg...>(std::move(f)); - return ret; - } - - template - void operator()(std::string name, Func&& f) - { - name_ = std::move(name); - (*this).template operator()(std::forward(f)); - } - - private: - std::function erased_handler_; - }; - - /// Default rule created when CROW_ROUTE is called. - template - class TaggedRule : public BaseRule, public RuleParameterTraits> - { - public: - using self_t = TaggedRule; - - TaggedRule(std::string rule): - BaseRule(std::move(rule)) - {} - - void validate() override - { - if (!handler_) - { - throw std::runtime_error(name_ + (!name_.empty() ? ": " : "") + "no handler for url " + rule_); - } - } - - template - void operator()(Func&& f) - { - handler_ = ( -#ifdef CROW_CAN_USE_CPP14 - [f = std::move(f)] -#else - [f] -#endif - (crow::request& req, crow::response& res, Args... args) { - detail::wrapped_handler_call(req, res, f, std::forward(args)...); - }); - } - - template - void operator()(std::string name, Func&& f) - { - name_ = std::move(name); - (*this).template operator()(std::forward(f)); - } - - void handle(request& req, response& res, const routing_params& params) override - { - if (!custom_templates_base.empty()) - mustache::set_base(custom_templates_base); - else if (mustache::detail::get_template_base_directory_ref() != mustache::detail::get_global_template_base_directory_ref()) - mustache::set_base(mustache::detail::get_global_template_base_directory_ref()); - - detail::routing_handler_call_helper::call< - detail::routing_handler_call_helper::call_params, - 0, 0, 0, 0, - black_magic::S, - black_magic::S<>>()( - detail::routing_handler_call_helper::call_params{handler_, params, req, res}); - } - - /// Enable local middleware for this handler - template - crow::detail::handler_call_bridge, App, Middlewares...> - middlewares() - { - // the handler_call_bridge allows the functor to be placed directly after this function - // instead of wrapping it with more parentheses - return {this}; - } - - private: - std::function handler_; - }; - - const int RULE_SPECIAL_REDIRECT_SLASH = 1; - - - /// A search tree. - class Trie - { - public: - struct Node - { - uint16_t rule_index{}; - // Assign the index to the maximum 32 unsigned integer value by default so that any other number (specifically 0) is a valid BP id. - uint16_t blueprint_index{INVALID_BP_ID}; - std::string key; - ParamType param = ParamType::MAX; // MAX = No param. - std::vector children; - - bool IsSimpleNode() const - { - return !rule_index && - blueprint_index == INVALID_BP_ID && - children.size() < 2 && - param == ParamType::MAX && - std::all_of(std::begin(children), std::end(children), [](Node* x) { - return x->param == ParamType::MAX; - }); - } - }; - - - Trie() - {} - - /// Check whether or not the trie is empty. - bool is_empty() - { - return head_.children.empty(); - } - - void optimize() - { - for (auto child : head_.children) - { - optimizeNode(child); - } - } - - - private: - void optimizeNode(Node* node) - { - if (node->children.empty()) - return; - if (node->IsSimpleNode()) - { - Node* child_temp = node->children[0]; - node->key = node->key + child_temp->key; - node->rule_index = child_temp->rule_index; - node->blueprint_index = child_temp->blueprint_index; - node->children = std::move(child_temp->children); - delete (child_temp); - optimizeNode(node); - } - else - { - for (auto& child : node->children) - { - optimizeNode(child); - } - } - } - - void debug_node_print(Node* node, int level) - { - if (node->param != ParamType::MAX) - { - switch (node->param) - { - case ParamType::INT: - CROW_LOG_DEBUG << std::string(2 * level, ' ') << ""; - break; - case ParamType::UINT: - CROW_LOG_DEBUG << std::string(2 * level, ' ') << ""; - break; - case ParamType::DOUBLE: - CROW_LOG_DEBUG << std::string(2 * level, ' ') << ""; - break; - case ParamType::STRING: - CROW_LOG_DEBUG << std::string(2 * level, ' ') << ""; - break; - case ParamType::PATH: - CROW_LOG_DEBUG << std::string(2 * level, ' ') << ""; - break; - default: - CROW_LOG_DEBUG << std::string(2 * level, ' ') << ""; - break; - } - } - else - CROW_LOG_DEBUG << std::string(2 * level, ' ') << node->key; - - for (auto& child : node->children) - { - debug_node_print(child, level + 1); - } - } - - public: - void debug_print() - { - CROW_LOG_DEBUG << "HEAD"; - for (auto& child : head_.children) - debug_node_print(child, 1); - } - - void validate() - { - if (!head_.IsSimpleNode()) - throw std::runtime_error("Internal error: Trie header should be simple!"); - optimize(); - } - - //Rule_index, Blueprint_index, routing_params - std::tuple, routing_params> find(const std::string& req_url, const Node* node = nullptr, unsigned pos = 0, routing_params* params = nullptr, std::vector* blueprints = nullptr) const - { - //start params as an empty struct - routing_params empty; - if (params == nullptr) - params = ∅ - //same for blueprint vector - std::vector MT; - if (blueprints == nullptr) - blueprints = &MT; - - uint16_t found{}; //The rule index to be found - std::vector found_BP; //The Blueprint indices to be found - routing_params match_params; //supposedly the final matched parameters - - //start from the head node - if (node == nullptr) - node = &head_; - - auto update_found = [&found, &found_BP, &match_params](std::tuple, routing_params>& ret) { - found_BP = std::move(std::get<1>(ret)); - if (std::get<0>(ret) && (!found || found > std::get<0>(ret))) - { - found = std::get<0>(ret); - match_params = std::move(std::get<2>(ret)); - } - }; - - //if the function was called on a node at the end of the string (the last recursion), return the nodes rule index, and whatever params were passed to the function - if (pos == req_url.size()) - { - found_BP = std::move(*blueprints); - return std::tuple, routing_params>{node->rule_index, *blueprints, *params}; - } - - bool found_fragment = false; - - for (auto& child : node->children) - { - if (child->param != ParamType::MAX) - { - if (child->param == ParamType::INT) - { - char c = req_url[pos]; - if ((c >= '0' && c <= '9') || c == '+' || c == '-') - { - char* eptr; - errno = 0; - long long int value = strtoll(req_url.data() + pos, &eptr, 10); - if (errno != ERANGE && eptr != req_url.data() + pos) - { - found_fragment = true; - params->int_params.push_back(value); - if (child->blueprint_index != INVALID_BP_ID) blueprints->push_back(child->blueprint_index); - auto ret = find(req_url, child, eptr - req_url.data(), params, blueprints); - update_found(ret); - params->int_params.pop_back(); - if (!blueprints->empty()) blueprints->pop_back(); - } - } - } - - else if (child->param == ParamType::UINT) - { - char c = req_url[pos]; - if ((c >= '0' && c <= '9') || c == '+') - { - char* eptr; - errno = 0; - unsigned long long int value = strtoull(req_url.data() + pos, &eptr, 10); - if (errno != ERANGE && eptr != req_url.data() + pos) - { - found_fragment = true; - params->uint_params.push_back(value); - if (child->blueprint_index != INVALID_BP_ID) blueprints->push_back(child->blueprint_index); - auto ret = find(req_url, child, eptr - req_url.data(), params, blueprints); - update_found(ret); - params->uint_params.pop_back(); - if (!blueprints->empty()) blueprints->pop_back(); - } - } - } - - else if (child->param == ParamType::DOUBLE) - { - char c = req_url[pos]; - if ((c >= '0' && c <= '9') || c == '+' || c == '-' || c == '.') - { - char* eptr; - errno = 0; - double value = strtod(req_url.data() + pos, &eptr); - if (errno != ERANGE && eptr != req_url.data() + pos) - { - found_fragment = true; - params->double_params.push_back(value); - if (child->blueprint_index != INVALID_BP_ID) blueprints->push_back(child->blueprint_index); - auto ret = find(req_url, child, eptr - req_url.data(), params, blueprints); - update_found(ret); - params->double_params.pop_back(); - if (!blueprints->empty()) blueprints->pop_back(); - } - } - } - - else if (child->param == ParamType::STRING) - { - size_t epos = pos; - for (; epos < req_url.size(); epos++) - { - if (req_url[epos] == '/') - break; - } - - if (epos != pos) - { - found_fragment = true; - params->string_params.push_back(req_url.substr(pos, epos - pos)); - if (child->blueprint_index != INVALID_BP_ID) blueprints->push_back(child->blueprint_index); - auto ret = find(req_url, child, epos, params, blueprints); - update_found(ret); - params->string_params.pop_back(); - if (!blueprints->empty()) blueprints->pop_back(); - } - } - - else if (child->param == ParamType::PATH) - { - size_t epos = req_url.size(); - - if (epos != pos) - { - found_fragment = true; - params->string_params.push_back(req_url.substr(pos, epos - pos)); - if (child->blueprint_index != INVALID_BP_ID) blueprints->push_back(child->blueprint_index); - auto ret = find(req_url, child, epos, params, blueprints); - update_found(ret); - params->string_params.pop_back(); - if (!blueprints->empty()) blueprints->pop_back(); - } - } - } - - else - { - const std::string& fragment = child->key; - if (req_url.compare(pos, fragment.size(), fragment) == 0) - { - found_fragment = true; - if (child->blueprint_index != INVALID_BP_ID) blueprints->push_back(child->blueprint_index); - auto ret = find(req_url, child, pos + fragment.size(), params, blueprints); - update_found(ret); - if (!blueprints->empty()) blueprints->pop_back(); - } - } - } - - if (!found_fragment) - found_BP = std::move(*blueprints); - - return std::tuple, routing_params>{found, found_BP, match_params}; //Called after all the recursions have been done - } - - //This functions assumes any blueprint info passed is valid - void add(const std::string& url, uint16_t rule_index, unsigned bp_prefix_length = 0, uint16_t blueprint_index = INVALID_BP_ID) - { - Node* idx = &head_; - - bool has_blueprint = bp_prefix_length != 0 && blueprint_index != INVALID_BP_ID; - - for (unsigned i = 0; i < url.size(); i++) - { - char c = url[i]; - if (c == '<') - { - static struct ParamTraits - { - ParamType type; - std::string name; - } paramTraits[] = - { - {ParamType::INT, ""}, - {ParamType::UINT, ""}, - {ParamType::DOUBLE, ""}, - {ParamType::DOUBLE, ""}, - {ParamType::STRING, ""}, - {ParamType::STRING, ""}, - {ParamType::PATH, ""}, - }; - - for (auto& x : paramTraits) - { - if (url.compare(i, x.name.size(), x.name) == 0) - { - bool found = false; - for (Node* child : idx->children) - { - if (child->param == x.type) - { - idx = child; - i += x.name.size(); - found = true; - break; - } - } - if (found) - break; - - auto new_node_idx = new_node(idx); - new_node_idx->param = x.type; - idx = new_node_idx; - i += x.name.size(); - break; - } - } - - i--; - } - else - { - //This part assumes the tree is unoptimized (every node has a max 1 character key) - bool piece_found = false; - for (auto& child : idx->children) - { - if (child->key[0] == c) - { - idx = child; - piece_found = true; - break; - } - } - if (!piece_found) - { - auto new_node_idx = new_node(idx); - new_node_idx->key = c; - //The assumption here is that you'd only need to add a blueprint index if the tree didn't have the BP prefix. - if (has_blueprint && i == bp_prefix_length) - new_node_idx->blueprint_index = blueprint_index; - idx = new_node_idx; - } - } - } - - //check if the last node already has a value (exact url already in Trie) - if (idx->rule_index) - throw std::runtime_error("handler already exists for " + url); - idx->rule_index = rule_index; - } - - size_t get_size() - { - return get_size(&head_); - } - - size_t get_size(Node* node) - { - unsigned size = 5; //rule_index, blueprint_index, and param - size += (node->key.size()); //each character in the key is 1 byte - for (auto child : node->children) - { - size += get_size(child); - } - return size; - } - - - private: - Node* new_node(Node* parent) - { - auto& children = parent->children; - children.resize(children.size() + 1); - children[children.size() - 1] = new Node(); - return children[children.size() - 1]; - } - - - Node head_; - }; - - /// A blueprint can be considered a smaller section of a Crow app, specifically where the router is conecerned. - - /// - /// You can use blueprints to assign a common prefix to rules' prefix, set custom static and template folders, and set a custom catchall route. - /// You can also assign nest blueprints for maximum Compartmentalization. - class Blueprint - { - public: - Blueprint(const std::string& prefix): - prefix_(prefix){}; - - Blueprint(const std::string& prefix, const std::string& static_dir): - prefix_(prefix), static_dir_(static_dir){}; - - Blueprint(const std::string& prefix, const std::string& static_dir, const std::string& templates_dir): - prefix_(prefix), static_dir_(static_dir), templates_dir_(templates_dir){}; - - /* - Blueprint(Blueprint& other) - { - prefix_ = std::move(other.prefix_); - all_rules_ = std::move(other.all_rules_); - } - - Blueprint(const Blueprint& other) - { - prefix_ = other.prefix_; - all_rules_ = other.all_rules_; - } -*/ - Blueprint(Blueprint&& value) - { - *this = std::move(value); - } - - Blueprint& operator=(const Blueprint& value) = delete; - - Blueprint& operator=(Blueprint&& value) noexcept - { - prefix_ = std::move(value.prefix_); - all_rules_ = std::move(value.all_rules_); - catchall_rule_ = std::move(value.catchall_rule_); - return *this; - } - - bool operator==(const Blueprint& value) - { - return value.prefix() == prefix_; - } - - bool operator!=(const Blueprint& value) - { - return value.prefix() != prefix_; - } - - std::string prefix() const - { - return prefix_; - } - - std::string static_dir() const - { - return static_dir_; - } - - DynamicRule& new_rule_dynamic(std::string&& rule) - { - std::string new_rule = std::move(rule); - new_rule = '/' + prefix_ + new_rule; - auto ruleObject = new DynamicRule(new_rule); - ruleObject->custom_templates_base = templates_dir_; - all_rules_.emplace_back(ruleObject); - - return *ruleObject; - } - - template - typename black_magic::arguments::type::template rebind& new_rule_tagged(std::string&& rule) - { - std::string new_rule = std::move(rule); - new_rule = '/' + prefix_ + new_rule; - using RuleT = typename black_magic::arguments::type::template rebind; - - auto ruleObject = new RuleT(new_rule); - ruleObject->custom_templates_base = templates_dir_; - all_rules_.emplace_back(ruleObject); - - return *ruleObject; - } - - void register_blueprint(Blueprint& blueprint) - { - if (blueprints_.empty() || std::find(blueprints_.begin(), blueprints_.end(), &blueprint) == blueprints_.end()) - { - apply_blueprint(blueprint); - blueprints_.emplace_back(&blueprint); - } - else - throw std::runtime_error("blueprint \"" + blueprint.prefix_ + "\" already exists in blueprint \"" + prefix_ + '\"'); - } - - - CatchallRule& catchall_rule() - { - return catchall_rule_; - } - - private: - void apply_blueprint(Blueprint& blueprint) - { - - blueprint.prefix_ = prefix_ + '/' + blueprint.prefix_; - blueprint.static_dir_ = static_dir_ + '/' + blueprint.static_dir_; - blueprint.templates_dir_ = templates_dir_ + '/' + blueprint.templates_dir_; - for (auto& rule : blueprint.all_rules_) - { - std::string new_rule = '/' + prefix_ + rule->rule_; - rule->rule_ = new_rule; - } - for (Blueprint* bp_child : blueprint.blueprints_) - { - Blueprint& bp_ref = *bp_child; - apply_blueprint(bp_ref); - } - } - - std::string prefix_; - std::string static_dir_; - std::string templates_dir_; - std::vector> all_rules_; - CatchallRule catchall_rule_; - std::vector blueprints_; - - friend class Router; - }; - - /// Handles matching requests to existing rules and upgrade requests. - class Router - { - public: - Router() - {} - - DynamicRule& new_rule_dynamic(const std::string& rule) - { - auto ruleObject = new DynamicRule(rule); - all_rules_.emplace_back(ruleObject); - - return *ruleObject; - } - - template - typename black_magic::arguments::type::template rebind& new_rule_tagged(const std::string& rule) - { - using RuleT = typename black_magic::arguments::type::template rebind; - - auto ruleObject = new RuleT(rule); - all_rules_.emplace_back(ruleObject); - - return *ruleObject; - } - - CatchallRule& catchall_rule() - { - return catchall_rule_; - } - - void internal_add_rule_object(const std::string& rule, BaseRule* ruleObject, const uint16_t& BP_index, std::vector& blueprints) - { - bool has_trailing_slash = false; - std::string rule_without_trailing_slash; - if (rule.size() > 1 && rule.back() == '/') - { - has_trailing_slash = true; - rule_without_trailing_slash = rule; - rule_without_trailing_slash.pop_back(); - } - - ruleObject->foreach_method([&](int method) { - per_methods_[method].rules.emplace_back(ruleObject); - per_methods_[method].trie.add(rule, per_methods_[method].rules.size() - 1, BP_index != INVALID_BP_ID ? blueprints[BP_index]->prefix().length() : 0, BP_index); - - // directory case: - // request to '/about' url matches '/about/' rule - if (has_trailing_slash) - { - per_methods_[method].trie.add(rule_without_trailing_slash, RULE_SPECIAL_REDIRECT_SLASH, BP_index != INVALID_BP_ID ? blueprints_[BP_index]->prefix().length() : 0, BP_index); - } - }); - } - - void register_blueprint(Blueprint& blueprint) - { - if (std::find(blueprints_.begin(), blueprints_.end(), &blueprint) == blueprints_.end()) - { - blueprints_.emplace_back(&blueprint); - } - else - throw std::runtime_error("blueprint \"" + blueprint.prefix_ + "\" already exists in router"); - } - - void get_recursive_child_methods(Blueprint* blueprint, std::vector& methods) - { - //we only need to deal with children if the blueprint has absolutely no methods (meaning its index won't be added to the trie) - if (blueprint->static_dir_.empty() && blueprint->all_rules_.empty()) - { - for (Blueprint* bp : blueprint->blueprints_) - { - get_recursive_child_methods(bp, methods); - } - } - else if (!blueprint->static_dir_.empty()) - methods.emplace_back(HTTPMethod::Get); - for (auto& rule : blueprint->all_rules_) - { - rule->foreach_method([&methods](unsigned method) { - HTTPMethod method_final = static_cast(method); - if (std::find(methods.begin(), methods.end(), method_final) == methods.end()) - methods.emplace_back(method_final); - }); - } - } - - void validate_bp(std::vector blueprints) - { - for (unsigned i = 0; i < blueprints.size(); i++) - { - Blueprint* blueprint = blueprints[i]; - if (blueprint->static_dir_ == "" && blueprint->all_rules_.empty()) - { - std::vector methods; - get_recursive_child_methods(blueprint, methods); - for (HTTPMethod x : methods) - { - int i = static_cast(x); - per_methods_[i].trie.add(blueprint->prefix(), 0, blueprint->prefix().length(), i); - } - } - for (auto& rule : blueprint->all_rules_) - { - if (rule) - { - auto upgraded = rule->upgrade(); - if (upgraded) - rule = std::move(upgraded); - rule->validate(); - internal_add_rule_object(rule->rule(), rule.get(), i, blueprints); - } - } - validate_bp(blueprint->blueprints_); - } - } - - void validate() - { - //Take all the routes from the registered blueprints and add them to `all_rules_` to be processed. - validate_bp(blueprints_); - - for (auto& rule : all_rules_) - { - if (rule) - { - auto upgraded = rule->upgrade(); - if (upgraded) - rule = std::move(upgraded); - rule->validate(); - internal_add_rule_object(rule->rule(), rule.get(), INVALID_BP_ID, blueprints_); - } - } - for (auto& per_method : per_methods_) - { - per_method.trie.validate(); - } - } - - // TODO maybe add actual_method - template - void handle_upgrade(const request& req, response& res, Adaptor&& adaptor) - { - if (req.method >= HTTPMethod::InternalMethodCount) - return; - - auto& per_method = per_methods_[static_cast(req.method)]; - auto& rules = per_method.rules; - unsigned rule_index = std::get<0>(per_method.trie.find(req.url)); - - if (!rule_index) - { - for (auto& per_method : per_methods_) - { - if (std::get<0>(per_method.trie.find(req.url))) - { - CROW_LOG_DEBUG << "Cannot match method " << req.url << " " << method_name(req.method); - res = response(405); - res.end(); - return; - } - } - - CROW_LOG_INFO << "Cannot match rules " << req.url; - res = response(404); - res.end(); - return; - } - - if (rule_index >= rules.size()) - throw std::runtime_error("Trie internal structure corrupted!"); - - if (rule_index == RULE_SPECIAL_REDIRECT_SLASH) - { - CROW_LOG_INFO << "Redirecting to a url with trailing slash: " << req.url; - res = response(301); - - // TODO(ipkn) absolute url building - if (req.get_header_value("Host").empty()) - { - res.add_header("Location", req.url + "/"); - } - else - { - res.add_header("Location", "http://" + req.get_header_value("Host") + req.url + "/"); - } - res.end(); - return; - } - - CROW_LOG_DEBUG << "Matched rule (upgrade) '" << rules[rule_index]->rule_ << "' " << static_cast(req.method) << " / " << rules[rule_index]->get_methods(); - - // any uncaught exceptions become 500s - try - { - rules[rule_index]->handle_upgrade(req, res, std::move(adaptor)); - } - catch (std::exception& e) - { - CROW_LOG_ERROR << "An uncaught exception occurred: " << e.what(); - res = response(500); - res.end(); - return; - } - catch (...) - { - CROW_LOG_ERROR << "An uncaught exception occurred. The type was unknown so no information was available."; - res = response(500); - res.end(); - return; - } - } - - void get_found_bp(std::vector& bp_i, std::vector& blueprints, std::vector& found_bps, uint16_t index = 0) - { - // This statement makes 3 assertions: - // 1. The index is above 0. - // 2. The index does not lie outside the given blueprint list. - // 3. The next blueprint we're adding has a prefix that starts the same as the already added blueprint + a slash (the rest is irrelevant). - // - // This is done to prevent a blueprint that has a prefix of "bp_prefix2" to be assumed as a child of one that has "bp_prefix". - // - // If any of the assertions is untrue, we delete the last item added, and continue using the blueprint list of the blueprint found before, the topmost being the router's list - auto verify_prefix = [&bp_i, &index, &blueprints, &found_bps]() { - return index > 0 && - bp_i[index] < blueprints.size() && - blueprints[bp_i[index]]->prefix().substr(0, found_bps[index - 1]->prefix().length() + 1).compare(std::string(found_bps[index - 1]->prefix() + '/')) == 0; - }; - if (index < bp_i.size()) - { - - if (verify_prefix()) - { - found_bps.push_back(blueprints[bp_i[index]]); - get_found_bp(bp_i, found_bps.back()->blueprints_, found_bps, ++index); - } - else - { - if (found_bps.size() < 2) - { - found_bps.clear(); - found_bps.push_back(blueprints_[bp_i[index]]); - } - else - { - found_bps.pop_back(); - Blueprint* last_element = found_bps.back(); - found_bps.push_back(last_element->blueprints_[bp_i[index]]); - } - get_found_bp(bp_i, found_bps.back()->blueprints_, found_bps, ++index); - } - } - } - - /// Is used to handle errors, you insert the error code, found route, request, and response. and it'll either call the appropriate catchall route (considering the blueprint system) and send you a status string (which is mainly used for debug messages), or just set the response code to the proper error code. - std::string get_error(unsigned short code, std::tuple, routing_params>& found, const request& req, response& res) - { - res.code = code; - std::vector bps_found; - get_found_bp(std::get<1>(found), blueprints_, bps_found); - for (int i = bps_found.size() - 1; i > 0; i--) - { - std::vector bpi = std::get<1>(found); - if (bps_found[i]->catchall_rule().has_handler()) - { - bps_found[i]->catchall_rule().handler_(req, res); -#ifdef CROW_ENABLE_DEBUG - return std::string("Redirected to Blueprint \"" + bps_found[i]->prefix() + "\" Catchall rule"); -#else - return std::string(); -#endif - } - } - if (catchall_rule_.has_handler()) - { - catchall_rule_.handler_(req, res); -#ifdef CROW_ENABLE_DEBUG - return std::string("Redirected to global Catchall rule"); -#else - return std::string(); -#endif - } - return std::string(); - } - - void handle(request& req, response& res) - { - HTTPMethod method_actual = req.method; - if (req.method >= HTTPMethod::InternalMethodCount) - return; - else if (req.method == HTTPMethod::Head) - { - method_actual = HTTPMethod::Get; - res.skip_body = true; - } - else if (req.method == HTTPMethod::Options) - { - std::string allow = "OPTIONS, HEAD, "; - - if (req.url == "/*") - { - for (int i = 0; i < static_cast(HTTPMethod::InternalMethodCount); i++) - { - if (!per_methods_[i].trie.is_empty()) - { - allow += method_name(static_cast(i)) + ", "; - } - } - allow = allow.substr(0, allow.size() - 2); - res = response(204); - res.set_header("Allow", allow); - res.end(); - return; - } - else - { - for (int i = 0; i < static_cast(HTTPMethod::InternalMethodCount); i++) - { - if (std::get<0>(per_methods_[i].trie.find(req.url))) - { - allow += method_name(static_cast(i)) + ", "; - } - } - if (allow != "OPTIONS, HEAD, ") - { - allow = allow.substr(0, allow.size() - 2); - res = response(204); - res.set_header("Allow", allow); - res.end(); - return; - } - else - { - CROW_LOG_DEBUG << "Cannot match rules " << req.url; - res = response(404); - res.end(); - return; - } - } - } - - auto& per_method = per_methods_[static_cast(method_actual)]; - auto& trie = per_method.trie; - auto& rules = per_method.rules; - - auto found = trie.find(req.url); - - unsigned rule_index = std::get<0>(found); - - if (!rule_index) - { - for (auto& per_method : per_methods_) - { - if (std::get<0>(per_method.trie.find(req.url))) //Route found, but in another method - { - const std::string error_message(get_error(405, found, req, res)); - CROW_LOG_DEBUG << "Cannot match method " << req.url << " " << method_name(method_actual) << ". " << error_message; - res.end(); - return; - } - } - //Route does not exist anywhere - - const std::string error_message(get_error(404, found, req, res)); - CROW_LOG_DEBUG << "Cannot match rules " << req.url << ". " << error_message; - res.end(); - return; - } - - if (rule_index >= rules.size()) - throw std::runtime_error("Trie internal structure corrupted!"); - - if (rule_index == RULE_SPECIAL_REDIRECT_SLASH) - { - CROW_LOG_INFO << "Redirecting to a url with trailing slash: " << req.url; - res = response(301); - - // TODO(ipkn) absolute url building - if (req.get_header_value("Host").empty()) - { - res.add_header("Location", req.url + "/"); - } - else - { - res.add_header("Location", "http://" + req.get_header_value("Host") + req.url + "/"); - } - res.end(); - return; - } - - CROW_LOG_DEBUG << "Matched rule '" << rules[rule_index]->rule_ << "' " << static_cast(req.method) << " / " << rules[rule_index]->get_methods(); - - // any uncaught exceptions become 500s - try - { - rules[rule_index]->handle(req, res, std::get<2>(found)); - } - catch (std::exception& e) - { - CROW_LOG_ERROR << "An uncaught exception occurred: " << e.what(); - res = response(500); - res.end(); - return; - } - catch (...) - { - CROW_LOG_ERROR << "An uncaught exception occurred. The type was unknown so no information was available."; - res = response(500); - res.end(); - return; - } - } - - void debug_print() - { - for (int i = 0; i < static_cast(HTTPMethod::InternalMethodCount); i++) - { - CROW_LOG_DEBUG << method_name(static_cast(i)); - per_methods_[i].trie.debug_print(); - } - } - - std::vector& blueprints() - { - return blueprints_; - } - - private: - CatchallRule catchall_rule_; - - struct PerMethod - { - std::vector rules; - Trie trie; - - // rule index 0, 1 has special meaning; preallocate it to avoid duplication. - PerMethod(): - rules(2) {} - }; - std::array(HTTPMethod::InternalMethodCount)> per_methods_; - std::vector> all_rules_; - std::vector blueprints_; - }; -} // namespace crow - - - -#pragma once - - - - - - - -namespace crow -{ - struct CORSHandler; - - /// Used for tuning CORS policies - struct CORSRules - { - friend struct crow::CORSHandler; - - /// Set Access-Control-Allow-Origin. Default is "*" - CORSRules& origin(const std::string& origin) - { - origin_ = origin; - return *this; - } - - /// Set Access-Control-Allow-Methods. Default is "*" - CORSRules& methods(crow::HTTPMethod method) - { - add_list_item(methods_, crow::method_name(method)); - return *this; - } - - /// Set Access-Control-Allow-Methods. Default is "*" - template - CORSRules& methods(crow::HTTPMethod method, Methods... method_list) - { - add_list_item(methods_, crow::method_name(method)); - methods(method_list...); - return *this; - } - - /// Set Access-Control-Allow-Headers. Default is "*" - CORSRules& headers(const std::string& header) - { - add_list_item(headers_, header); - return *this; - } - - /// Set Access-Control-Allow-Headers. Default is "*" - template - CORSRules& headers(const std::string& header, Headers... header_list) - { - add_list_item(headers_, header); - headers(header_list...); - return *this; - } - - /// Set Access-Control-Max-Age. Default is none - CORSRules& max_age(int max_age) - { - max_age_ = std::to_string(max_age); - return *this; - } - - /// Enable Access-Control-Allow-Credentials - CORSRules& allow_credentials() - { - allow_credentials_ = true; - return *this; - } - - /// Ignore CORS and don't send any headers - void ignore() - { - ignore_ = true; - } - - /// Handle CORS on specific prefix path - CORSRules& prefix(const std::string& prefix); - - /// Handle CORS for specific blueprint - CORSRules& blueprint(const Blueprint& bp); - - /// Global CORS policy - CORSRules& global(); - - private: - CORSRules() = delete; - CORSRules(CORSHandler* handler): - handler_(handler) {} - - /// build comma separated list - void add_list_item(std::string& list, const std::string& val) - { - if (list == "*") list = ""; - if (list.size() > 0) list += ", "; - list += val; - } - - /// Set header `key` to `value` if it is not set - void set_header_no_override(const std::string& key, const std::string& value, crow::response& res) - { - if (value.size() == 0) return; - if (!get_header_value(res.headers, key).empty()) return; - res.add_header(key, value); - } - - /// Set response headers - void apply(crow::response& res) - { - if (ignore_) return; - set_header_no_override("Access-Control-Allow-Origin", origin_, res); - set_header_no_override("Access-Control-Allow-Methods", methods_, res); - set_header_no_override("Access-Control-Allow-Headers", headers_, res); - set_header_no_override("Access-Control-Max-Age", max_age_, res); - if (allow_credentials_) set_header_no_override("Access-Control-Allow-Credentials", "true", res); - } - - bool ignore_ = false; - // TODO: support multiple origins that are dynamically selected - std::string origin_ = "*"; - std::string methods_ = "*"; - std::string headers_ = "*"; - std::string max_age_; - bool allow_credentials_ = false; - - CORSHandler* handler_; - }; - - /// CORSHandler is a global middleware for setting CORS headers. - - /// - /// By default, it sets Access-Control-Allow-Origin/Methods/Headers to "*". - /// The default behaviour can be changed with the `global()` cors rule. - /// Additional rules for prexies can be added with `prefix()`. - struct CORSHandler - { - struct context - {}; - - void before_handle(crow::request& /*req*/, crow::response& /*res*/, context& /*ctx*/) - {} - - void after_handle(crow::request& req, crow::response& res, context& /*ctx*/) - { - auto& rule = find_rule(req.url); - rule.apply(res); - } - - /// Handle CORS on a specific prefix path - CORSRules& prefix(const std::string& prefix) - { - rules.emplace_back(prefix, CORSRules(this)); - return rules.back().second; - } - - /// Handle CORS for a specific blueprint - CORSRules& blueprint(const Blueprint& bp) - { - rules.emplace_back(bp.prefix(), CORSRules(this)); - return rules.back().second; - } - - /// Get the global CORS policy - CORSRules& global() - { - return default_; - } - - private: - CORSRules& find_rule(const std::string& path) - { - // TODO: use a trie in case of many rules - for (auto& rule : rules) - { - // Check if path starts with a rules prefix - if (path.rfind(rule.first, 0) == 0) - { - return rule.second; - } - } - return default_; - } - - std::vector> rules; - CORSRules default_ = CORSRules(this); - }; - - inline CORSRules& CORSRules::prefix(const std::string& prefix) - { - return handler_->prefix(prefix); - } - - inline CORSRules& CORSRules::blueprint(const Blueprint& bp) - { - return handler_->blueprint(bp); - } - - inline CORSRules& CORSRules::global() - { - return handler_->global(); - } - -} // namespace crow - - - -#ifdef CROW_ENABLE_COMPRESSION -#pragma once - -#include -#include - -// http://zlib.net/manual.html -namespace crow -{ - namespace compression - { - // Values used in the 'windowBits' parameter for deflateInit2. - enum algorithm - { - // 15 is the default value for deflate - DEFLATE = 15, - // windowBits can also be greater than 15 for optional gzip encoding. - // Add 16 to windowBits to write a simple gzip header and trailer around the compressed data instead of a zlib wrapper. - GZIP = 15 | 16, - }; - - inline std::string compress_string(std::string const& str, algorithm algo) - { - std::string compressed_str; - z_stream stream{}; - // Initialize with the default values - if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK) - { - char buffer[8192]; - - stream.avail_in = str.size(); - // zlib does not take a const pointer. The data is not altered. - stream.next_in = const_cast(reinterpret_cast(str.c_str())); - - int code = Z_OK; - do - { - stream.avail_out = sizeof(buffer); - stream.next_out = reinterpret_cast(&buffer[0]); - - code = ::deflate(&stream, Z_FINISH); - // Successful and non-fatal error code returned by deflate when used with Z_FINISH flush - if (code == Z_OK || code == Z_STREAM_END) - { - std::copy(&buffer[0], &buffer[sizeof(buffer) - stream.avail_out], std::back_inserter(compressed_str)); - } - - } while (code == Z_OK); - - if (code != Z_STREAM_END) - compressed_str.clear(); - - ::deflateEnd(&stream); - } - - return compressed_str; - } - - inline std::string decompress_string(std::string const& deflated_string) - { - std::string inflated_string; - Bytef tmp[8192]; - - z_stream zstream{}; - zstream.avail_in = deflated_string.size(); - // Nasty const_cast but zlib won't alter its contents - zstream.next_in = const_cast(reinterpret_cast(deflated_string.c_str())); - // Initialize with automatic header detection, for gzip support - if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK) - { - do - { - zstream.avail_out = sizeof(tmp); - zstream.next_out = &tmp[0]; - - auto ret = ::inflate(&zstream, Z_NO_FLUSH); - if (ret == Z_OK || ret == Z_STREAM_END) - { - std::copy(&tmp[0], &tmp[sizeof(tmp) - zstream.avail_out], std::back_inserter(inflated_string)); - } - else - { - // Something went wrong with inflate; make sure we return an empty string - inflated_string.clear(); - break; - } - - } while (zstream.avail_out == 0); - - // Free zlib's internal memory - ::inflateEnd(&zstream); - } - - return inflated_string; - } - } // namespace compression -} // namespace crow - -#endif - - - -#pragma once -#include -#include -#include -#include -#include -#include -#include - - - - - - - - - - - - - - - - - - - - - - - - -namespace crow -{ - using namespace boost; - using tcp = asio::ip::tcp; - - -#ifdef CROW_ENABLE_DEBUG - static std::atomic connectionCount; -#endif - - /// An HTTP connection. - template - class Connection - { - friend struct crow::response; - - public: - Connection( - boost::asio::io_service& io_service, - Handler* handler, - const std::string& server_name, - std::tuple* middlewares, - std::function& get_cached_date_str_f, - detail::task_timer& task_timer, - typename Adaptor::context* adaptor_ctx_, - std::atomic& queue_length): - adaptor_(io_service, adaptor_ctx_), - handler_(handler), - parser_(this), - server_name_(server_name), - middlewares_(middlewares), - get_cached_date_str(get_cached_date_str_f), - task_timer_(task_timer), - res_stream_threshold_(handler->stream_threshold()), - queue_length_(queue_length) - { -#ifdef CROW_ENABLE_DEBUG - connectionCount++; - CROW_LOG_DEBUG << "Connection (" << this << ") allocated, total: " << connectionCount; -#endif - } - - ~Connection() - { - res.complete_request_handler_ = nullptr; - cancel_deadline_timer(); -#ifdef CROW_ENABLE_DEBUG - connectionCount--; - CROW_LOG_DEBUG << "Connection (" << this << ") freed, total: " << connectionCount; -#endif - } - - /// The TCP socket on top of which the connection is established. - decltype(std::declval().raw_socket())& socket() - { - return adaptor_.raw_socket(); - } - - void start() - { - adaptor_.start([this](const boost::system::error_code& ec) { - if (!ec) - { - start_deadline(); - - do_read(); - } - else - { - CROW_LOG_ERROR << "Could not start adaptor: " << ec.message(); - check_destroy(); - } - }); - } - - void handle_header() - { - // HTTP 1.1 Expect: 100-continue - if (parser_.http_major == 1 && parser_.http_minor == 1 && get_header_value(parser_.headers, "expect") == "100-continue") // Using the parser because the request isn't made yet. - { - buffers_.clear(); - static std::string expect_100_continue = "HTTP/1.1 100 Continue\r\n\r\n"; - buffers_.emplace_back(expect_100_continue.data(), expect_100_continue.size()); - do_write(); - } - } - - void handle() - { - cancel_deadline_timer(); - bool is_invalid_request = false; - add_keep_alive_ = false; - - req_ = std::move(parser_.to_request()); - request& req = req_; - - req.remote_ip_address = adaptor_.remote_endpoint().address().to_string(); - - add_keep_alive_ = req.keep_alive; - close_connection_ = req.close_connection; - - if (req.check_version(1, 1)) // HTTP/1.1 - { - if (!req.headers.count("host")) - { - is_invalid_request = true; - res = response(400); - } - if (req.upgrade) - { - // h2 or h2c headers - if (req.get_header_value("upgrade").substr(0, 2) == "h2") - { - // TODO(ipkn): HTTP/2 - // currently, ignore upgrade header - } - else - { - close_connection_ = true; - handler_->handle_upgrade(req, res, std::move(adaptor_)); - return; - } - } - } - - CROW_LOG_INFO << "Request: " << boost::lexical_cast(adaptor_.remote_endpoint()) << " " << this << " HTTP/" << (char)(req.http_ver_major + '0') << "." << (char)(req.http_ver_minor + '0') << ' ' << method_name(req.method) << " " << req.url; - - - need_to_call_after_handlers_ = false; - if (!is_invalid_request) - { - res.complete_request_handler_ = [] {}; - res.is_alive_helper_ = [this]() -> bool { - return adaptor_.is_open(); - }; - - ctx_ = detail::context(); - req.middleware_context = static_cast(&ctx_); - req.middleware_container = static_cast(middlewares_); - req.io_service = &adaptor_.get_io_service(); - - detail::middleware_call_helper(*middlewares_, req, res, ctx_); - - if (!res.completed_) - { - res.complete_request_handler_ = [this] { - this->complete_request(); - }; - need_to_call_after_handlers_ = true; - handler_->handle(req, res); - if (add_keep_alive_) - res.set_header("connection", "Keep-Alive"); - } - else - { - complete_request(); - } - } - else - { - complete_request(); - } - } - - /// Call the after handle middleware and send the write the response to the connection. - void complete_request() - { - CROW_LOG_INFO << "Response: " << this << ' ' << req_.raw_url << ' ' << res.code << ' ' << close_connection_; - - if (need_to_call_after_handlers_) - { - need_to_call_after_handlers_ = false; - - // call all after_handler of middlewares - detail::after_handlers_call_helper< - detail::middleware_call_criteria_only_global, - (static_cast(sizeof...(Middlewares)) - 1), - decltype(ctx_), - decltype(*middlewares_)>(*middlewares_, ctx_, req_, res); - } -#ifdef CROW_ENABLE_COMPRESSION - if (handler_->compression_used()) - { - std::string accept_encoding = req_.get_header_value("Accept-Encoding"); - if (!accept_encoding.empty() && res.compressed) - { - switch (handler_->compression_algorithm()) - { - case compression::DEFLATE: - if (accept_encoding.find("deflate") != std::string::npos) - { - res.body = compression::compress_string(res.body, compression::algorithm::DEFLATE); - res.set_header("Content-Encoding", "deflate"); - } - break; - case compression::GZIP: - if (accept_encoding.find("gzip") != std::string::npos) - { - res.body = compression::compress_string(res.body, compression::algorithm::GZIP); - res.set_header("Content-Encoding", "gzip"); - } - break; - default: - break; - } - } - } -#endif - //if there is a redirection with a partial URL, treat the URL as a route. - std::string location = res.get_header_value("Location"); - if (!location.empty() && location.find("://", 0) == std::string::npos) - { -#ifdef CROW_ENABLE_SSL - if (handler_->ssl_used()) - location.insert(0, "https://" + req_.get_header_value("Host")); - else -#endif - location.insert(0, "http://" + req_.get_header_value("Host")); - res.set_header("location", location); - } - - prepare_buffers(); - - if (res.is_static_type()) - { - do_write_static(); - } - else - { - do_write_general(); - } - } - - private: - void prepare_buffers() - { - //auto self = this->shared_from_this(); - res.complete_request_handler_ = nullptr; - - if (!adaptor_.is_open()) - { - //CROW_LOG_DEBUG << this << " delete (socket is closed) " << is_reading << ' ' << is_writing; - //delete this; - return; - } - // TODO(EDev): HTTP version in status codes should be dynamic - // Keep in sync with common.h/status - static std::unordered_map statusCodes = { - {status::CONTINUE, "HTTP/1.1 100 Continue\r\n"}, - {status::SWITCHING_PROTOCOLS, "HTTP/1.1 101 Switching Protocols\r\n"}, - - {status::OK, "HTTP/1.1 200 OK\r\n"}, - {status::CREATED, "HTTP/1.1 201 Created\r\n"}, - {status::ACCEPTED, "HTTP/1.1 202 Accepted\r\n"}, - {status::NON_AUTHORITATIVE_INFORMATION, "HTTP/1.1 203 Non-Authoritative Information\r\n"}, - {status::NO_CONTENT, "HTTP/1.1 204 No Content\r\n"}, - {status::RESET_CONTENT, "HTTP/1.1 205 Reset Content\r\n"}, - {status::PARTIAL_CONTENT, "HTTP/1.1 206 Partial Content\r\n"}, - - {status::MULTIPLE_CHOICES, "HTTP/1.1 300 Multiple Choices\r\n"}, - {status::MOVED_PERMANENTLY, "HTTP/1.1 301 Moved Permanently\r\n"}, - {status::FOUND, "HTTP/1.1 302 Found\r\n"}, - {status::SEE_OTHER, "HTTP/1.1 303 See Other\r\n"}, - {status::NOT_MODIFIED, "HTTP/1.1 304 Not Modified\r\n"}, - {status::TEMPORARY_REDIRECT, "HTTP/1.1 307 Temporary Redirect\r\n"}, - {status::PERMANENT_REDIRECT, "HTTP/1.1 308 Permanent Redirect\r\n"}, - - {status::BAD_REQUEST, "HTTP/1.1 400 Bad Request\r\n"}, - {status::UNAUTHORIZED, "HTTP/1.1 401 Unauthorized\r\n"}, - {status::FORBIDDEN, "HTTP/1.1 403 Forbidden\r\n"}, - {status::NOT_FOUND, "HTTP/1.1 404 Not Found\r\n"}, - {status::METHOD_NOT_ALLOWED, "HTTP/1.1 405 Method Not Allowed\r\n"}, - {status::PROXY_AUTHENTICATION_REQUIRED, "HTTP/1.1 407 Proxy Authentication Required\r\n"}, - {status::CONFLICT, "HTTP/1.1 409 Conflict\r\n"}, - {status::GONE, "HTTP/1.1 410 Gone\r\n"}, - {status::PAYLOAD_TOO_LARGE, "HTTP/1.1 413 Payload Too Large\r\n"}, - {status::UNSUPPORTED_MEDIA_TYPE, "HTTP/1.1 415 Unsupported Media Type\r\n"}, - {status::RANGE_NOT_SATISFIABLE, "HTTP/1.1 416 Range Not Satisfiable\r\n"}, - {status::EXPECTATION_FAILED, "HTTP/1.1 417 Expectation Failed\r\n"}, - {status::PRECONDITION_REQUIRED, "HTTP/1.1 428 Precondition Required\r\n"}, - {status::TOO_MANY_REQUESTS, "HTTP/1.1 429 Too Many Requests\r\n"}, - {status::UNAVAILABLE_FOR_LEGAL_REASONS, "HTTP/1.1 451 Unavailable For Legal Reasons\r\n"}, - - {status::INTERNAL_SERVER_ERROR, "HTTP/1.1 500 Internal Server Error\r\n"}, - {status::NOT_IMPLEMENTED, "HTTP/1.1 501 Not Implemented\r\n"}, - {status::BAD_GATEWAY, "HTTP/1.1 502 Bad Gateway\r\n"}, - {status::SERVICE_UNAVAILABLE, "HTTP/1.1 503 Service Unavailable\r\n"}, - {status::GATEWAY_TIMEOUT, "HTTP/1.1 504 Gateway Timeout\r\n"}, - {status::VARIANT_ALSO_NEGOTIATES, "HTTP/1.1 506 Variant Also Negotiates\r\n"}, - }; - - static const std::string seperator = ": "; - - buffers_.clear(); - buffers_.reserve(4 * (res.headers.size() + 5) + 3); - - if (!statusCodes.count(res.code)) - res.code = 500; - { - auto& status = statusCodes.find(res.code)->second; - buffers_.emplace_back(status.data(), status.size()); - } - - if (res.code >= 400 && res.body.empty()) - res.body = statusCodes[res.code].substr(9); - - for (auto& kv : res.headers) - { - buffers_.emplace_back(kv.first.data(), kv.first.size()); - buffers_.emplace_back(seperator.data(), seperator.size()); - buffers_.emplace_back(kv.second.data(), kv.second.size()); - buffers_.emplace_back(crlf.data(), crlf.size()); - } - - if (!res.manual_length_header && !res.headers.count("content-length")) - { - content_length_ = std::to_string(res.body.size()); - static std::string content_length_tag = "Content-Length: "; - buffers_.emplace_back(content_length_tag.data(), content_length_tag.size()); - buffers_.emplace_back(content_length_.data(), content_length_.size()); - buffers_.emplace_back(crlf.data(), crlf.size()); - } - if (!res.headers.count("server")) - { - static std::string server_tag = "Server: "; - buffers_.emplace_back(server_tag.data(), server_tag.size()); - buffers_.emplace_back(server_name_.data(), server_name_.size()); - buffers_.emplace_back(crlf.data(), crlf.size()); - } - if (!res.headers.count("date")) - { - static std::string date_tag = "Date: "; - date_str_ = get_cached_date_str(); - buffers_.emplace_back(date_tag.data(), date_tag.size()); - buffers_.emplace_back(date_str_.data(), date_str_.size()); - buffers_.emplace_back(crlf.data(), crlf.size()); - } - if (add_keep_alive_) - { - static std::string keep_alive_tag = "Connection: Keep-Alive"; - buffers_.emplace_back(keep_alive_tag.data(), keep_alive_tag.size()); - buffers_.emplace_back(crlf.data(), crlf.size()); - } - - buffers_.emplace_back(crlf.data(), crlf.size()); - } - - void do_write_static() - { - is_writing = true; - boost::asio::write(adaptor_.socket(), buffers_); - - if (res.file_info.statResult == 0) - { - std::ifstream is(res.file_info.path.c_str(), std::ios::in | std::ios::binary); - char buf[16384]; - while (is.read(buf, sizeof(buf)).gcount() > 0) - { - std::vector buffers; - buffers.push_back(boost::asio::buffer(buf)); - do_write_sync(buffers); - } - } - is_writing = false; - if (close_connection_) - { - adaptor_.shutdown_readwrite(); - adaptor_.close(); - CROW_LOG_DEBUG << this << " from write (static)"; - check_destroy(); - } - - res.end(); - res.clear(); - buffers_.clear(); - } - - void do_write_general() - { - if (res.body.length() < res_stream_threshold_) - { - res_body_copy_.swap(res.body); - buffers_.emplace_back(res_body_copy_.data(), res_body_copy_.size()); - - do_write(); - - if (need_to_start_read_after_complete_) - { - need_to_start_read_after_complete_ = false; - start_deadline(); - do_read(); - } - } - else - { - is_writing = true; - boost::asio::write(adaptor_.socket(), buffers_); // Write the response start / headers - if (res.body.length() > 0) - { - std::string buf; - std::vector buffers; - - while (res.body.length() > 16384) - { - //buf.reserve(16385); - buf = res.body.substr(0, 16384); - res.body = res.body.substr(16384); - buffers.clear(); - buffers.push_back(boost::asio::buffer(buf)); - do_write_sync(buffers); - } - // Collect whatever is left (less than 16KB) and send it down the socket - // buf.reserve(is.length()); - buf = res.body; - res.body.clear(); - - buffers.clear(); - buffers.push_back(boost::asio::buffer(buf)); - do_write_sync(buffers); - } - is_writing = false; - if (close_connection_) - { - adaptor_.shutdown_readwrite(); - adaptor_.close(); - CROW_LOG_DEBUG << this << " from write (res_stream)"; - check_destroy(); - } - - res.end(); - res.clear(); - buffers_.clear(); - } - } - - void do_read() - { - //auto self = this->shared_from_this(); - is_reading = true; - adaptor_.socket().async_read_some( - boost::asio::buffer(buffer_), - [this](const boost::system::error_code& ec, std::size_t bytes_transferred) { - bool error_while_reading = true; - if (!ec) - { - bool ret = parser_.feed(buffer_.data(), bytes_transferred); - if (ret && adaptor_.is_open()) - { - error_while_reading = false; - } - } - - if (error_while_reading) - { - cancel_deadline_timer(); - parser_.done(); - adaptor_.shutdown_read(); - adaptor_.close(); - is_reading = false; - CROW_LOG_DEBUG << this << " from read(1) with description: \"" << http_errno_description(static_cast(parser_.http_errno)) << '\"'; - check_destroy(); - } - else if (close_connection_) - { - cancel_deadline_timer(); - parser_.done(); - is_reading = false; - check_destroy(); - // adaptor will close after write - } - else if (!need_to_call_after_handlers_) - { - start_deadline(); - do_read(); - } - else - { - // res will be completed later by user - need_to_start_read_after_complete_ = true; - } - }); - } - - void do_write() - { - //auto self = this->shared_from_this(); - is_writing = true; - boost::asio::async_write( - adaptor_.socket(), buffers_, - [&](const boost::system::error_code& ec, std::size_t /*bytes_transferred*/) { - is_writing = false; - res.clear(); - res_body_copy_.clear(); - if (!ec) - { - if (close_connection_) - { - adaptor_.shutdown_write(); - adaptor_.close(); - CROW_LOG_DEBUG << this << " from write(1)"; - check_destroy(); - } - } - else - { - CROW_LOG_DEBUG << this << " from write(2)"; - check_destroy(); - } - }); - } - - inline void do_write_sync(std::vector& buffers) - { - - boost::asio::write(adaptor_.socket(), buffers, [&](std::error_code ec, std::size_t) { - if (!ec) - { - return false; - } - else - { - CROW_LOG_ERROR << ec << " - happened while sending buffers"; - CROW_LOG_DEBUG << this << " from write (sync)(2)"; - check_destroy(); - return true; - } - }); - } - - void check_destroy() - { - CROW_LOG_DEBUG << this << " is_reading " << is_reading << " is_writing " << is_writing; - if (!is_reading && !is_writing) - { - queue_length_--; - CROW_LOG_DEBUG << this << " delete (idle) (queue length: " << queue_length_ << ')'; - delete this; - } - } - - void cancel_deadline_timer() - { - CROW_LOG_DEBUG << this << " timer cancelled: " << &task_timer_ << ' ' << task_id_; - task_timer_.cancel(task_id_); - } - - void start_deadline(/*int timeout = 5*/) - { - cancel_deadline_timer(); - - task_id_ = task_timer_.schedule([this] { - if (!adaptor_.is_open()) - { - return; - } - adaptor_.shutdown_readwrite(); - adaptor_.close(); - }); - CROW_LOG_DEBUG << this << " timer added: " << &task_timer_ << ' ' << task_id_; - } - - private: - Adaptor adaptor_; - Handler* handler_; - - boost::array buffer_; - - HTTPParser parser_; - request req_; - response res; - - bool close_connection_ = false; - - const std::string& server_name_; - std::vector buffers_; - - std::string content_length_; - std::string date_str_; - std::string res_body_copy_; - - detail::task_timer::identifier_type task_id_; - - bool is_reading{}; - bool is_writing{}; - bool need_to_call_after_handlers_{}; - bool need_to_start_read_after_complete_{}; - bool add_keep_alive_{}; - - std::tuple* middlewares_; - detail::context ctx_; - - std::function& get_cached_date_str; - detail::task_timer& task_timer_; - - size_t res_stream_threshold_; - - std::atomic& queue_length_; - }; - -} // namespace crow - - - -#pragma once - -#include -#include -#include -#ifdef CROW_ENABLE_SSL -#include -#endif -#include -#include -#include -#include -#include - - - - - - - - - - -namespace crow -{ - using namespace boost; - using tcp = asio::ip::tcp; - - template - class Server - { - public: - Server(Handler* handler, std::string bindaddr, uint16_t port, std::string server_name = std::string("Crow/") + VERSION, std::tuple* middlewares = nullptr, uint16_t concurrency = 1, uint8_t timeout = 5, typename Adaptor::context* adaptor_ctx = nullptr): - acceptor_(io_service_, tcp::endpoint(boost::asio::ip::address::from_string(bindaddr), port)), - signals_(io_service_), - tick_timer_(io_service_), - handler_(handler), - concurrency_(concurrency), - timeout_(timeout), - server_name_(server_name), - port_(port), - bindaddr_(bindaddr), - task_queue_length_pool_(concurrency_ - 1), - middlewares_(middlewares), - adaptor_ctx_(adaptor_ctx) - {} - - void set_tick_function(std::chrono::milliseconds d, std::function f) - { - tick_interval_ = d; - tick_function_ = f; - } - - void on_tick() - { - tick_function_(); - tick_timer_.expires_from_now(boost::posix_time::milliseconds(tick_interval_.count())); - tick_timer_.async_wait([this](const boost::system::error_code& ec) { - if (ec) - return; - on_tick(); - }); - } - - void run() - { - uint16_t worker_thread_count = concurrency_ - 1; - for (int i = 0; i < worker_thread_count; i++) - io_service_pool_.emplace_back(new boost::asio::io_service()); - get_cached_date_str_pool_.resize(worker_thread_count); - task_timer_pool_.resize(worker_thread_count); - - std::vector> v; - std::atomic init_count(0); - for (uint16_t i = 0; i < worker_thread_count; i++) - v.push_back( - std::async( - std::launch::async, [this, i, &init_count] { - // thread local date string get function - auto last = std::chrono::steady_clock::now(); - - std::string date_str; - auto update_date_str = [&] { - auto last_time_t = time(0); - tm my_tm; - -#if defined(_MSC_VER) || defined(__MINGW32__) - gmtime_s(&my_tm, &last_time_t); -#else - gmtime_r(&last_time_t, &my_tm); -#endif - date_str.resize(100); - size_t date_str_sz = strftime(&date_str[0], 99, "%a, %d %b %Y %H:%M:%S GMT", &my_tm); - date_str.resize(date_str_sz); - }; - update_date_str(); - get_cached_date_str_pool_[i] = [&]() -> std::string { - if (std::chrono::steady_clock::now() - last >= std::chrono::seconds(1)) - { - last = std::chrono::steady_clock::now(); - update_date_str(); - } - return date_str; - }; - - // initializing task timers - detail::task_timer task_timer(*io_service_pool_[i]); - task_timer.set_default_timeout(timeout_); - task_timer_pool_[i] = &task_timer; - task_queue_length_pool_[i] = 0; - - init_count++; - while (1) - { - try - { - if (io_service_pool_[i]->run() == 0) - { - // when io_service.run returns 0, there are no more works to do. - break; - } - } - catch (std::exception& e) - { - CROW_LOG_ERROR << "Worker Crash: An uncaught exception occurred: " << e.what(); - } - } - })); - - if (tick_function_ && tick_interval_.count() > 0) - { - tick_timer_.expires_from_now(boost::posix_time::milliseconds(tick_interval_.count())); - tick_timer_.async_wait( - [this](const boost::system::error_code& ec) { - if (ec) - return; - on_tick(); - }); - } - - port_ = acceptor_.local_endpoint().port(); - handler_->port(port_); - - handler_->notify_server_start(); - CROW_LOG_INFO << server_name_ << " server is running at " << (handler_->ssl_used() ? "https://" : "http://") << bindaddr_ << ":" << acceptor_.local_endpoint().port() << " using " << concurrency_ << " threads"; - CROW_LOG_INFO << "Call `app.loglevel(crow::LogLevel::Warning)` to hide Info level logs."; - - signals_.async_wait( - [&](const boost::system::error_code& /*error*/, int /*signal_number*/) { - stop(); - }); - - while (worker_thread_count != init_count) - std::this_thread::yield(); - - do_accept(); - - std::thread( - [this] { - io_service_.run(); - CROW_LOG_INFO << "Exiting."; - }) - .join(); - } - - void stop() - { - io_service_.stop(); - for (auto& io_service : io_service_pool_) - io_service->stop(); - } - - void signal_clear() - { - signals_.clear(); - } - - void signal_add(int signal_number) - { - signals_.add(signal_number); - } - - private: - uint16_t pick_io_service_idx() - { - uint16_t min_queue_idx = 0; - - // TODO improve load balancing - for (uint16_t i = 1; i < task_queue_length_pool_.size() && task_queue_length_pool_[min_queue_idx] > 0; i++) - // No need to check other io_services if the current one has no tasks - { - if (task_queue_length_pool_[i] < task_queue_length_pool_[min_queue_idx]) - min_queue_idx = i; - } - return min_queue_idx; - } - - void do_accept() - { - uint16_t service_idx = pick_io_service_idx(); - asio::io_service& is = *io_service_pool_[service_idx]; - task_queue_length_pool_[service_idx]++; - CROW_LOG_DEBUG << &is << " {" << service_idx << "} queue length: " << task_queue_length_pool_[service_idx]; - - auto p = new Connection( - is, handler_, server_name_, middlewares_, - get_cached_date_str_pool_[service_idx], *task_timer_pool_[service_idx], adaptor_ctx_, task_queue_length_pool_[service_idx]); - - acceptor_.async_accept( - p->socket(), - [this, p, &is, service_idx](boost::system::error_code ec) { - if (!ec) - { - is.post( - [p] { - p->start(); - }); - } - else - { - task_queue_length_pool_[service_idx]--; - CROW_LOG_DEBUG << &is << " {" << service_idx << "} queue length: " << task_queue_length_pool_[service_idx]; - delete p; - } - do_accept(); - }); - } - - private: - asio::io_service io_service_; - std::vector> io_service_pool_; - std::vector task_timer_pool_; - std::vector> get_cached_date_str_pool_; - tcp::acceptor acceptor_; - boost::asio::signal_set signals_; - boost::asio::deadline_timer tick_timer_; - - Handler* handler_; - uint16_t concurrency_{2}; - std::uint8_t timeout_; - std::string server_name_; - uint16_t port_; - std::string bindaddr_; - std::vector> task_queue_length_pool_; - - std::chrono::milliseconds tick_interval_; - std::function tick_function_; - - std::tuple* middlewares_; - - typename Adaptor::context* adaptor_ctx_; - }; -} // namespace crow - - - -#pragma once - -#include -#include -#include -#include -#include -#include -#include -#include -#include - - - - - - - - - - - - - - - - - - - -#ifdef CROW_ENABLE_COMPRESSION - - -#endif - -#ifdef CROW_MSVC_WORKAROUND -#define CROW_ROUTE(app, url) app.route_dynamic(url) -#define CROW_BP_ROUTE(blueprint, url) blueprint.new_rule_dynamic(url) -#else -#define CROW_ROUTE(app, url) app.route(url) -#define CROW_BP_ROUTE(blueprint, url) blueprint.new_rule_tagged(url) -#define CROW_MIDDLEWARES(app, ...) middlewares::type, __VA_ARGS__>() -#endif -#define CROW_CATCHALL_ROUTE(app) app.catchall_route() -#define CROW_BP_CATCHALL_ROUTE(blueprint) blueprint.catchall_rule() - -namespace crow -{ -#ifdef CROW_ENABLE_SSL - using ssl_context_t = boost::asio::ssl::context; -#endif - /// The main server application - - /// - /// Use `SimpleApp` or `App` - template - class Crow - { - public: - /// This crow application - using self_t = Crow; - /// The HTTP server - using server_t = Server; -#ifdef CROW_ENABLE_SSL - /// An HTTP server that runs on SSL with an SSLAdaptor - using ssl_server_t = Server; -#endif - Crow() - {} - - /// Process an Upgrade request - - /// - /// Currently used to upgrade an HTTP connection to a WebSocket connection - template - void handle_upgrade(const request& req, response& res, Adaptor&& adaptor) - { - router_.handle_upgrade(req, res, adaptor); - } - - /// Process the request and generate a response for it - void handle(request& req, response& res) - { - router_.handle(req, res); - } - - /// Create a dynamic route using a rule (**Use CROW_ROUTE instead**) - DynamicRule& route_dynamic(std::string&& rule) - { - return router_.new_rule_dynamic(std::move(rule)); - } - - ///Create a route using a rule (**Use CROW_ROUTE instead**) - template -#ifdef CROW_GCC83_WORKAROUND - auto& route(std::string&& rule) -#else - auto route(std::string&& rule) -#endif -#if defined CROW_CAN_USE_CPP17 && !defined CROW_GCC83_WORKAROUND - -> typename std::invoke_result), Router, std::string&&>::type -#elif !defined CROW_GCC83_WORKAROUND - -> typename std::result_of)(Router, std::string&&)>::type -#endif - { - return router_.new_rule_tagged(std::move(rule)); - } - - /// Create a route for any requests without a proper route (**Use CROW_CATCHALL_ROUTE instead**) - CatchallRule& catchall_route() - { - return router_.catchall_rule(); - } - - self_t& signal_clear() - { - signals_.clear(); - return *this; - } - - self_t& signal_add(int signal_number) - { - signals_.push_back(signal_number); - return *this; - } - - /// Set the port that Crow will handle requests on - self_t& port(std::uint16_t port) - { - port_ = port; - return *this; - } - - /// Get the port that Crow will handle requests on - std::uint16_t port() - { - return port_; - } - - - /// Set the connection timeout in seconds (default is 5) - self_t& timeout(std::uint8_t timeout) - { - timeout_ = timeout; - return *this; - } - - /// Set the server name - self_t& server_name(std::string server_name) - { - server_name_ = server_name; - return *this; - } - - /// The IP address that Crow will handle requests on (default is 0.0.0.0) - self_t& bindaddr(std::string bindaddr) - { - bindaddr_ = bindaddr; - return *this; - } - - /// Run the server on multiple threads using all available threads - self_t& multithreaded() - { - return concurrency(std::thread::hardware_concurrency()); - } - - /// Run the server on multiple threads using a specific number - self_t& concurrency(std::uint16_t concurrency) - { - if (concurrency < 2) // Crow can have a minimum of 2 threads running - concurrency = 2; - concurrency_ = concurrency; - return *this; - } - - /// Set the server's log level - - /// - /// Possible values are:
- /// crow::LogLevel::Debug (0)
- /// crow::LogLevel::Info (1)
- /// crow::LogLevel::Warning (2)
- /// crow::LogLevel::Error (3)
- /// crow::LogLevel::Critical (4)
- self_t& loglevel(LogLevel level) - { - crow::logger::setLogLevel(level); - return *this; - } - - /// Set the response body size (in bytes) beyond which Crow automatically streams responses (Default is 1MiB) - - /// - /// Any streamed response is unaffected by Crow's timer, and therefore won't timeout before a response is fully sent. - self_t& stream_threshold(size_t threshold) - { - res_stream_threshold_ = threshold; - return *this; - } - - /// Get the response body size (in bytes) beyond which Crow automatically streams responses - size_t& stream_threshold() - { - return res_stream_threshold_; - } - - self_t& register_blueprint(Blueprint& blueprint) - { - router_.register_blueprint(blueprint); - return *this; - } - - /// Set a custom duration and function to run on every tick - template - self_t& tick(Duration d, Func f) - { - tick_interval_ = std::chrono::duration_cast(d); - tick_function_ = f; - return *this; - } - -#ifdef CROW_ENABLE_COMPRESSION - self_t& use_compression(compression::algorithm algorithm) - { - comp_algorithm_ = algorithm; - compression_used_ = true; - return *this; - } - - compression::algorithm compression_algorithm() - { - return comp_algorithm_; - } - - bool compression_used() const - { - return compression_used_; - } -#endif - /// A wrapper for `validate()` in the router - - /// - /// Go through the rules, upgrade them if possible, and add them to the list of rules - void validate() - { - if (!validated_) - { - -#ifndef CROW_DISABLE_STATIC_DIR - route(CROW_STATIC_ENDPOINT)([](crow::response& res, std::string file_path_partial) { - utility::sanitize_filename(file_path_partial); - res.set_static_file_info_unsafe(CROW_STATIC_DIRECTORY + file_path_partial); - res.end(); - }); - -#if defined(__APPLE__) || defined(__MACH__) - if (!router_.blueprints().empty()) -#endif - { - for (Blueprint* bp : router_.blueprints()) - { - if (!bp->static_dir().empty()) - { - bp->new_rule_tagged(CROW_STATIC_ENDPOINT)([bp](crow::response& res, std::string file_path_partial) { - utility::sanitize_filename(file_path_partial); - res.set_static_file_info_unsafe(bp->static_dir() + '/' + file_path_partial); - res.end(); - }); - } - } - } -#endif - - router_.validate(); - validated_ = true; - } - } - - /// Notify anything using `wait_for_server_start()` to proceed - void notify_server_start() - { - std::unique_lock lock(start_mutex_); - server_started_ = true; - cv_started_.notify_all(); - } - - /// Run the server - void run() - { - - validate(); - -#ifdef CROW_ENABLE_SSL - if (ssl_used_) - { - ssl_server_ = std::move(std::unique_ptr(new ssl_server_t(this, bindaddr_, port_, server_name_, &middlewares_, concurrency_, timeout_, &ssl_context_))); - ssl_server_->set_tick_function(tick_interval_, tick_function_); - ssl_server_->signal_clear(); - for (auto snum : signals_) - { - ssl_server_->signal_add(snum); - } - notify_server_start(); - ssl_server_->run(); - } - else -#endif - { - server_ = std::move(std::unique_ptr(new server_t(this, bindaddr_, port_, server_name_, &middlewares_, concurrency_, timeout_, nullptr))); - server_->set_tick_function(tick_interval_, tick_function_); - server_->signal_clear(); - for (auto snum : signals_) - { - server_->signal_add(snum); - } - - server_->run(); - } - } - - /// Non-blocking version of \ref run() - std::future run_async() - { - return std::async(std::launch::async, [&] { - this->run(); - }); - } - - /// Stop the server - void stop() - { -#ifdef CROW_ENABLE_SSL - if (ssl_used_) - { - if (ssl_server_) { ssl_server_->stop(); } - } - else -#endif - { - if (server_) { server_->stop(); } - } - } - - /// Print the routing paths defined for each HTTP method - void debug_print() - { - CROW_LOG_DEBUG << "Routing:"; - router_.debug_print(); - } - - -#ifdef CROW_ENABLE_SSL - - /// Use certificate and key files for SSL - self_t& ssl_file(const std::string& crt_filename, const std::string& key_filename) - { - ssl_used_ = true; - ssl_context_.set_verify_mode(boost::asio::ssl::verify_peer); - ssl_context_.set_verify_mode(boost::asio::ssl::verify_client_once); - ssl_context_.use_certificate_file(crt_filename, ssl_context_t::pem); - ssl_context_.use_private_key_file(key_filename, ssl_context_t::pem); - ssl_context_.set_options( - boost::asio::ssl::context::default_workarounds | boost::asio::ssl::context::no_sslv2 | boost::asio::ssl::context::no_sslv3); - return *this; - } - - /// Use .pem file for SSL - self_t& ssl_file(const std::string& pem_filename) - { - ssl_used_ = true; - ssl_context_.set_verify_mode(boost::asio::ssl::verify_peer); - ssl_context_.set_verify_mode(boost::asio::ssl::verify_client_once); - ssl_context_.load_verify_file(pem_filename); - ssl_context_.set_options( - boost::asio::ssl::context::default_workarounds | boost::asio::ssl::context::no_sslv2 | boost::asio::ssl::context::no_sslv3); - return *this; - } - - /// Use certificate chain and key files for SSL - self_t& ssl_chainfile(const std::string& crt_filename, const std::string& key_filename) - { - ssl_used_ = true; - ssl_context_.set_verify_mode(boost::asio::ssl::verify_peer); - ssl_context_.set_verify_mode(boost::asio::ssl::verify_client_once); - ssl_context_.use_certificate_chain_file(crt_filename); - ssl_context_.use_private_key_file(key_filename, ssl_context_t::pem); - ssl_context_.set_options( - boost::asio::ssl::context::default_workarounds | boost::asio::ssl::context::no_sslv2 | boost::asio::ssl::context::no_sslv3); - return *this; - } - - self_t& ssl(boost::asio::ssl::context&& ctx) - { - ssl_used_ = true; - ssl_context_ = std::move(ctx); - return *this; - } - - bool ssl_used() const - { - return ssl_used_; - } -#else - template - self_t& ssl_file(T&&, Remain&&...) - { - // We can't call .ssl() member function unless CROW_ENABLE_SSL is defined. - static_assert( - // make static_assert dependent to T; always false - std::is_base_of::value, - "Define CROW_ENABLE_SSL to enable ssl support."); - return *this; - } - - template - self_t& ssl_chainfile(T&&, Remain&&...) - { - // We can't call .ssl() member function unless CROW_ENABLE_SSL is defined. - static_assert( - // make static_assert dependent to T; always false - std::is_base_of::value, - "Define CROW_ENABLE_SSL to enable ssl support."); - return *this; - } - - template - self_t& ssl(T&&) - { - // We can't call .ssl() member function unless CROW_ENABLE_SSL is defined. - static_assert( - // make static_assert dependent to T; always false - std::is_base_of::value, - "Define CROW_ENABLE_SSL to enable ssl support."); - return *this; - } - - bool ssl_used() const - { - return false; - } -#endif - - // middleware - using context_t = detail::context; - using mw_container_t = std::tuple; - template - typename T::context& get_context(const request& req) - { - static_assert(black_magic::contains::value, "App doesn't have the specified middleware type."); - auto& ctx = *reinterpret_cast(req.middleware_context); - return ctx.template get(); - } - - template - T& get_middleware() - { - return utility::get_element_by_type(middlewares_); - } - - /// Wait until the server has properly started - void wait_for_server_start() - { - std::unique_lock lock(start_mutex_); - if (server_started_) - return; - cv_started_.wait(lock); - } - - private: - std::uint8_t timeout_{5}; - uint16_t port_ = 80; - uint16_t concurrency_ = 2; - bool validated_ = false; - std::string server_name_ = std::string("Crow/") + VERSION; - std::string bindaddr_ = "0.0.0.0"; - size_t res_stream_threshold_ = 1048576; - Router router_; - -#ifdef CROW_ENABLE_COMPRESSION - compression::algorithm comp_algorithm_; - bool compression_used_{false}; -#endif - - std::chrono::milliseconds tick_interval_; - std::function tick_function_; - - std::tuple middlewares_; - -#ifdef CROW_ENABLE_SSL - std::unique_ptr ssl_server_; - bool ssl_used_{false}; - ssl_context_t ssl_context_{boost::asio::ssl::context::sslv23}; -#endif - - std::unique_ptr server_; - - std::vector signals_{SIGINT, SIGTERM}; - - bool server_started_{false}; - std::condition_variable cv_started_; - std::mutex start_mutex_; - }; - template - using App = Crow; - using SimpleApp = Crow<>; -} // namespace crow - - - -#pragma once - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +#include "crow/query_string.h" +#include "crow/http_parser_merged.h" +#include "crow/ci_map.h" +#include "crow/TinySHA1.hpp" +#include "crow/settings.h" +#include "crow/socket_adaptors.h" +#include "crow/json.h" +#include "crow/mustache.h" +#include "crow/logging.h" +#include "crow/task_timer.h" +#include "crow/utility.h" +#include "crow/common.h" +#include "crow/http_request.h" +#include "crow/websocket.h" +#include "crow/parser.h" +#include "crow/http_response.h" +#include "crow/multipart.h" +#include "crow/routing.h" +#include "crow/middleware.h" +#include "crow/middleware_context.h" +#include "crow/compression.h" +#include "crow/http_connection.h" +#include "crow/http_server.h" +#include "crow/app.h" diff --git a/src/lib/crow/TinySHA1.hpp b/src/lib/crow/TinySHA1.hpp new file mode 100644 index 0000000..70af046 --- /dev/null +++ b/src/lib/crow/TinySHA1.hpp @@ -0,0 +1,196 @@ +/* + * + * TinySHA1 - a header only implementation of the SHA1 algorithm in C++. Based + * on the implementation in boost::uuid::details. + * + * SHA1 Wikipedia Page: http://en.wikipedia.org/wiki/SHA-1 + * + * Copyright (c) 2012-22 SAURAV MOHAPATRA + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ +#ifndef _TINY_SHA1_HPP_ +#define _TINY_SHA1_HPP_ +#include +#include +#include +#include +namespace sha1 +{ + class SHA1 + { + public: + typedef uint32_t digest32_t[5]; + typedef uint8_t digest8_t[20]; + inline static uint32_t LeftRotate(uint32_t value, size_t count) { + return (value << count) ^ (value >> (32-count)); + } + SHA1(){ reset(); } + virtual ~SHA1() {} + SHA1(const SHA1& s) { *this = s; } + const SHA1& operator = (const SHA1& s) { + memcpy(m_digest, s.m_digest, 5 * sizeof(uint32_t)); + memcpy(m_block, s.m_block, 64); + m_blockByteIndex = s.m_blockByteIndex; + m_byteCount = s.m_byteCount; + return *this; + } + SHA1& reset() { + m_digest[0] = 0x67452301; + m_digest[1] = 0xEFCDAB89; + m_digest[2] = 0x98BADCFE; + m_digest[3] = 0x10325476; + m_digest[4] = 0xC3D2E1F0; + m_blockByteIndex = 0; + m_byteCount = 0; + return *this; + } + SHA1& processByte(uint8_t octet) { + this->m_block[this->m_blockByteIndex++] = octet; + ++this->m_byteCount; + if(m_blockByteIndex == 64) { + this->m_blockByteIndex = 0; + processBlock(); + } + return *this; + } + SHA1& processBlock(const void* const start, const void* const end) { + const uint8_t* begin = static_cast(start); + const uint8_t* finish = static_cast(end); + while(begin != finish) { + processByte(*begin); + begin++; + } + return *this; + } + SHA1& processBytes(const void* const data, size_t len) { + const uint8_t* block = static_cast(data); + processBlock(block, block + len); + return *this; + } + const uint32_t* getDigest(digest32_t digest) { + size_t bitCount = this->m_byteCount * 8; + processByte(0x80); + if (this->m_blockByteIndex > 56) { + while (m_blockByteIndex != 0) { + processByte(0); + } + while (m_blockByteIndex < 56) { + processByte(0); + } + } else { + while (m_blockByteIndex < 56) { + processByte(0); + } + } + processByte(0); + processByte(0); + processByte(0); + processByte(0); + processByte( static_cast((bitCount>>24) & 0xFF)); + processByte( static_cast((bitCount>>16) & 0xFF)); + processByte( static_cast((bitCount>>8 ) & 0xFF)); + processByte( static_cast((bitCount) & 0xFF)); + + memcpy(digest, m_digest, 5 * sizeof(uint32_t)); + return digest; + } + const uint8_t* getDigestBytes(digest8_t digest) { + digest32_t d32; + getDigest(d32); + size_t di = 0; + digest[di++] = ((d32[0] >> 24) & 0xFF); + digest[di++] = ((d32[0] >> 16) & 0xFF); + digest[di++] = ((d32[0] >> 8) & 0xFF); + digest[di++] = ((d32[0]) & 0xFF); + + digest[di++] = ((d32[1] >> 24) & 0xFF); + digest[di++] = ((d32[1] >> 16) & 0xFF); + digest[di++] = ((d32[1] >> 8) & 0xFF); + digest[di++] = ((d32[1]) & 0xFF); + + digest[di++] = ((d32[2] >> 24) & 0xFF); + digest[di++] = ((d32[2] >> 16) & 0xFF); + digest[di++] = ((d32[2] >> 8) & 0xFF); + digest[di++] = ((d32[2]) & 0xFF); + + digest[di++] = ((d32[3] >> 24) & 0xFF); + digest[di++] = ((d32[3] >> 16) & 0xFF); + digest[di++] = ((d32[3] >> 8) & 0xFF); + digest[di++] = ((d32[3]) & 0xFF); + + digest[di++] = ((d32[4] >> 24) & 0xFF); + digest[di++] = ((d32[4] >> 16) & 0xFF); + digest[di++] = ((d32[4] >> 8) & 0xFF); + digest[di++] = ((d32[4]) & 0xFF); + return digest; + } + + protected: + void processBlock() { + uint32_t w[80]; + for (size_t i = 0; i < 16; i++) { + w[i] = (m_block[i*4 + 0] << 24); + w[i] |= (m_block[i*4 + 1] << 16); + w[i] |= (m_block[i*4 + 2] << 8); + w[i] |= (m_block[i*4 + 3]); + } + for (size_t i = 16; i < 80; i++) { + w[i] = LeftRotate((w[i-3] ^ w[i-8] ^ w[i-14] ^ w[i-16]), 1); + } + + uint32_t a = m_digest[0]; + uint32_t b = m_digest[1]; + uint32_t c = m_digest[2]; + uint32_t d = m_digest[3]; + uint32_t e = m_digest[4]; + + for (std::size_t i=0; i<80; ++i) { + uint32_t f = 0; + uint32_t k = 0; + + if (i<20) { + f = (b & c) | (~b & d); + k = 0x5A827999; + } else if (i<40) { + f = b ^ c ^ d; + k = 0x6ED9EBA1; + } else if (i<60) { + f = (b & c) | (b & d) | (c & d); + k = 0x8F1BBCDC; + } else { + f = b ^ c ^ d; + k = 0xCA62C1D6; + } + uint32_t temp = LeftRotate(a, 5) + f + e + k + w[i]; + e = d; + d = c; + c = LeftRotate(b, 30); + b = a; + a = temp; + } + + m_digest[0] += a; + m_digest[1] += b; + m_digest[2] += c; + m_digest[3] += d; + m_digest[4] += e; + } + private: + digest32_t m_digest; + uint8_t m_block[64]; + size_t m_blockByteIndex; + size_t m_byteCount; + }; +} +#endif diff --git a/src/lib/crow/app.h b/src/lib/crow/app.h new file mode 100644 index 0000000..28a3d7f --- /dev/null +++ b/src/lib/crow/app.h @@ -0,0 +1,601 @@ +#pragma once + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "crow/version.h" +#include "crow/settings.h" +#include "crow/logging.h" +#include "crow/utility.h" +#include "crow/routing.h" +#include "crow/middleware_context.h" +#include "crow/http_request.h" +#include "crow/http_server.h" +#include "crow/task_timer.h" +#include "crow/websocket.h" +#ifdef CROW_ENABLE_COMPRESSION +#include "crow/compression.h" +#endif + +#ifdef CROW_MSVC_WORKAROUND +#define CROW_ROUTE(app, url) app.route_dynamic(url) +#define CROW_BP_ROUTE(blueprint, url) blueprint.new_rule_dynamic(url) +#else +#define CROW_ROUTE(app, url) app.template route(url) +#define CROW_BP_ROUTE(blueprint, url) blueprint.new_rule_tagged(url) +#define CROW_WEBSOCKET_ROUTE(app, url) app.route(url).websocket::type>(&app) +#define CROW_MIDDLEWARES(app, ...) template middlewares::type, __VA_ARGS__>() +#endif +#define CROW_CATCHALL_ROUTE(app) app.catchall_route() +#define CROW_BP_CATCHALL_ROUTE(blueprint) blueprint.catchall_rule() + +namespace crow +{ +#ifdef CROW_ENABLE_SSL + using ssl_context_t = asio::ssl::context; +#endif + /// The main server application + + /// + /// Use `SimpleApp` or `App` + template + class Crow + { + public: + /// This crow application + using self_t = Crow; + /// The HTTP server + using server_t = Server; +#ifdef CROW_ENABLE_SSL + /// An HTTP server that runs on SSL with an SSLAdaptor + using ssl_server_t = Server; +#endif + Crow() + {} + + /// Construct Crow with a subset of middleware + template + Crow(Ts&&... ts): + middlewares_(make_middleware_tuple(std::forward(ts)...)) + {} + + /// Process an Upgrade request + + /// + /// Currently used to upgrade an HTTP connection to a WebSocket connection + template + void handle_upgrade(const request& req, response& res, Adaptor&& adaptor) + { + router_.handle_upgrade(req, res, adaptor); + } + + /// Process only the method and URL of a request and provide a route (or an error response) + std::unique_ptr handle_initial(request& req, response& res) + { + return router_.handle_initial(req, res); + } + + /// Process the fully parsed request and generate a response for it + void handle(request& req, response& res, std::unique_ptr& found) + { + router_.handle(req, res, *found); + } + + /// Process a fully parsed request from start to finish (primarily used for debugging) + void handle_full(request& req, response& res) + { + auto found = handle_initial(req, res); + if (found->rule_index) + handle(req, res, found); + } + + /// Create a dynamic route using a rule (**Use CROW_ROUTE instead**) + DynamicRule& route_dynamic(std::string&& rule) + { + return router_.new_rule_dynamic(std::move(rule)); + } + + ///Create a route using a rule (**Use CROW_ROUTE instead**) + template +#ifdef CROW_GCC83_WORKAROUND + auto& route(std::string&& rule) +#else + auto route(std::string&& rule) +#endif +#if defined CROW_CAN_USE_CPP17 && !defined CROW_GCC83_WORKAROUND + -> typename std::invoke_result), Router, std::string&&>::type +#elif !defined CROW_GCC83_WORKAROUND + -> typename std::result_of)(Router, std::string&&)>::type +#endif + { + return router_.new_rule_tagged(std::move(rule)); + } + + /// Create a route for any requests without a proper route (**Use CROW_CATCHALL_ROUTE instead**) + CatchallRule& catchall_route() + { + return router_.catchall_rule(); + } + + /// Set the default max payload size for websockets + self_t& websocket_max_payload(uint64_t max_payload) + { + max_payload_ = max_payload; + return *this; + } + + /// Get the default max payload size for websockets + uint64_t websocket_max_payload() + { + return max_payload_; + } + + self_t& signal_clear() + { + signals_.clear(); + return *this; + } + + self_t& signal_add(int signal_number) + { + signals_.push_back(signal_number); + return *this; + } + + std::vector signals() + { + return signals_; + } + + /// Set the port that Crow will handle requests on + self_t& port(std::uint16_t port) + { + port_ = port; + return *this; + } + + /// Get the port that Crow will handle requests on + std::uint16_t port() + { + return port_; + } + + /// Set the connection timeout in seconds (default is 5) + self_t& timeout(std::uint8_t timeout) + { + timeout_ = timeout; + return *this; + } + + /// Set the server name + self_t& server_name(std::string server_name) + { + server_name_ = server_name; + return *this; + } + + /// The IP address that Crow will handle requests on (default is 0.0.0.0) + self_t& bindaddr(std::string bindaddr) + { + bindaddr_ = bindaddr; + return *this; + } + + /// Get the address that Crow will handle requests on + std::string bindaddr() + { + return bindaddr_; + } + + /// Run the server on multiple threads using all available threads + self_t& multithreaded() + { + return concurrency(std::thread::hardware_concurrency()); + } + + /// Run the server on multiple threads using a specific number + self_t& concurrency(std::uint16_t concurrency) + { + if (concurrency < 2) // Crow can have a minimum of 2 threads running + concurrency = 2; + concurrency_ = concurrency; + return *this; + } + + /// Get the number of threads that server is using + std::uint16_t concurrency() + { + return concurrency_; + } + + /// Set the server's log level + + /// + /// Possible values are:
+ /// crow::LogLevel::Debug (0)
+ /// crow::LogLevel::Info (1)
+ /// crow::LogLevel::Warning (2)
+ /// crow::LogLevel::Error (3)
+ /// crow::LogLevel::Critical (4)
+ self_t& loglevel(LogLevel level) + { + crow::logger::setLogLevel(level); + return *this; + } + + /// Set the response body size (in bytes) beyond which Crow automatically streams responses (Default is 1MiB) + + /// + /// Any streamed response is unaffected by Crow's timer, and therefore won't timeout before a response is fully sent. + self_t& stream_threshold(size_t threshold) + { + res_stream_threshold_ = threshold; + return *this; + } + + /// Get the response body size (in bytes) beyond which Crow automatically streams responses + size_t& stream_threshold() + { + return res_stream_threshold_; + } + + self_t& register_blueprint(Blueprint& blueprint) + { + router_.register_blueprint(blueprint); + return *this; + } + + /// Set a custom duration and function to run on every tick + template + self_t& tick(Duration d, Func f) + { + tick_interval_ = std::chrono::duration_cast(d); + tick_function_ = f; + return *this; + } + +#ifdef CROW_ENABLE_COMPRESSION + self_t& use_compression(compression::algorithm algorithm) + { + comp_algorithm_ = algorithm; + compression_used_ = true; + return *this; + } + + compression::algorithm compression_algorithm() + { + return comp_algorithm_; + } + + bool compression_used() const + { + return compression_used_; + } +#endif + /// A wrapper for `validate()` in the router + + /// + /// Go through the rules, upgrade them if possible, and add them to the list of rules + void validate() + { + if (!validated_) + { + +#ifndef CROW_DISABLE_STATIC_DIR + + // stat on windows doesn't care whether '/' or '\' is being used. on Linux however, using '\' doesn't work. therefore every instance of '\' gets replaced with '/' then a check is done to make sure the directory ends with '/'. + std::string static_dir_(CROW_STATIC_DIRECTORY); + std::replace(static_dir_.begin(), static_dir_.end(), '\\', '/'); + if (static_dir_[static_dir_.length() - 1] != '/') + static_dir_ += '/'; + + route(CROW_STATIC_ENDPOINT)([static_dir_](crow::response& res, std::string file_path_partial) { + utility::sanitize_filename(file_path_partial); + res.set_static_file_info_unsafe(static_dir_ + file_path_partial); + res.end(); + }); + +#if defined(__APPLE__) || defined(__MACH__) + if (!router_.blueprints().empty()) +#endif + { + for (Blueprint* bp : router_.blueprints()) + { + if (!bp->static_dir().empty()) + { + // stat on windows doesn't care whether '/' or '\' is being used. on Linux however, using '\' doesn't work. therefore every instance of '\' gets replaced with '/' then a check is done to make sure the directory ends with '/'. + std::string static_dir_(bp->static_dir()); + std::replace(static_dir_.begin(), static_dir_.end(), '\\', '/'); + if (static_dir_[static_dir_.length() - 1] != '/') + static_dir_ += '/'; + + bp->new_rule_tagged(CROW_STATIC_ENDPOINT)([static_dir_](crow::response& res, std::string file_path_partial) { + utility::sanitize_filename(file_path_partial); + res.set_static_file_info_unsafe(static_dir_ + file_path_partial); + res.end(); + }); + } + } + } +#endif + + router_.validate(); + validated_ = true; + } + } + + /// Run the server + void run() + { + + validate(); + +#ifdef CROW_ENABLE_SSL + if (ssl_used_) + { + ssl_server_ = std::move(std::unique_ptr(new ssl_server_t(this, bindaddr_, port_, server_name_, &middlewares_, concurrency_, timeout_, &ssl_context_))); + ssl_server_->set_tick_function(tick_interval_, tick_function_); + ssl_server_->signal_clear(); + for (auto snum : signals_) + { + ssl_server_->signal_add(snum); + } + notify_server_start(); + ssl_server_->run(); + } + else +#endif + { + server_ = std::move(std::unique_ptr(new server_t(this, bindaddr_, port_, server_name_, &middlewares_, concurrency_, timeout_, nullptr))); + server_->set_tick_function(tick_interval_, tick_function_); + for (auto snum : signals_) + { + server_->signal_add(snum); + } + notify_server_start(); + server_->run(); + } + } + + /// Non-blocking version of \ref run() + /// + /// The output from this method needs to be saved into a variable! + /// Otherwise the call will be made on the same thread. + std::future run_async() + { + return std::async(std::launch::async, [&] { + this->run(); + }); + } + + /// Stop the server + void stop() + { +#ifdef CROW_ENABLE_SSL + if (ssl_used_) + { + if (ssl_server_) { ssl_server_->stop(); } + } + else +#endif + { + // TODO(EDev): Move these 6 lines to a method in http_server. + std::vector websockets_to_close = websockets_; + for (auto websocket : websockets_to_close) + { + CROW_LOG_INFO << "Quitting Websocket: " << websocket; + websocket->close("Server Application Terminated"); + } + if (server_) { server_->stop(); } + } + } + + void add_websocket(crow::websocket::connection* conn) + { + websockets_.push_back(conn); + } + + void remove_websocket(crow::websocket::connection* conn) + { + websockets_.erase(std::remove(websockets_.begin(), websockets_.end(), conn), websockets_.end()); + } + + /// Print the routing paths defined for each HTTP method + void debug_print() + { + CROW_LOG_DEBUG << "Routing:"; + router_.debug_print(); + } + + +#ifdef CROW_ENABLE_SSL + + /// Use certificate and key files for SSL + self_t& ssl_file(const std::string& crt_filename, const std::string& key_filename) + { + ssl_used_ = true; + ssl_context_.set_verify_mode(asio::ssl::verify_peer); + ssl_context_.set_verify_mode(asio::ssl::verify_client_once); + ssl_context_.use_certificate_file(crt_filename, ssl_context_t::pem); + ssl_context_.use_private_key_file(key_filename, ssl_context_t::pem); + ssl_context_.set_options( + asio::ssl::context::default_workarounds | asio::ssl::context::no_sslv2 | asio::ssl::context::no_sslv3); + return *this; + } + + /// Use .pem file for SSL + self_t& ssl_file(const std::string& pem_filename) + { + ssl_used_ = true; + ssl_context_.set_verify_mode(asio::ssl::verify_peer); + ssl_context_.set_verify_mode(asio::ssl::verify_client_once); + ssl_context_.load_verify_file(pem_filename); + ssl_context_.set_options( + asio::ssl::context::default_workarounds | asio::ssl::context::no_sslv2 | asio::ssl::context::no_sslv3); + return *this; + } + + /// Use certificate chain and key files for SSL + self_t& ssl_chainfile(const std::string& crt_filename, const std::string& key_filename) + { + ssl_used_ = true; + ssl_context_.set_verify_mode(asio::ssl::verify_peer); + ssl_context_.set_verify_mode(asio::ssl::verify_client_once); + ssl_context_.use_certificate_chain_file(crt_filename); + ssl_context_.use_private_key_file(key_filename, ssl_context_t::pem); + ssl_context_.set_options( + asio::ssl::context::default_workarounds | asio::ssl::context::no_sslv2 | asio::ssl::context::no_sslv3); + return *this; + } + + self_t& ssl(asio::ssl::context&& ctx) + { + ssl_used_ = true; + ssl_context_ = std::move(ctx); + return *this; + } + + bool ssl_used() const + { + return ssl_used_; + } +#else + template + self_t& ssl_file(T&&, Remain&&...) + { + // We can't call .ssl() member function unless CROW_ENABLE_SSL is defined. + static_assert( + // make static_assert dependent to T; always false + std::is_base_of::value, + "Define CROW_ENABLE_SSL to enable ssl support."); + return *this; + } + + template + self_t& ssl_chainfile(T&&, Remain&&...) + { + // We can't call .ssl() member function unless CROW_ENABLE_SSL is defined. + static_assert( + // make static_assert dependent to T; always false + std::is_base_of::value, + "Define CROW_ENABLE_SSL to enable ssl support."); + return *this; + } + + template + self_t& ssl(T&&) + { + // We can't call .ssl() member function unless CROW_ENABLE_SSL is defined. + static_assert( + // make static_assert dependent to T; always false + std::is_base_of::value, + "Define CROW_ENABLE_SSL to enable ssl support."); + return *this; + } + + bool ssl_used() const + { + return false; + } +#endif + + // middleware + using context_t = detail::context; + using mw_container_t = std::tuple; + template + typename T::context& get_context(const request& req) + { + static_assert(black_magic::contains::value, "App doesn't have the specified middleware type."); + auto& ctx = *reinterpret_cast(req.middleware_context); + return ctx.template get(); + } + + template + T& get_middleware() + { + return utility::get_element_by_type(middlewares_); + } + + /// Wait until the server has properly started + void wait_for_server_start() + { + { + std::unique_lock lock(start_mutex_); + if (!server_started_) + cv_started_.wait(lock); + } + if (server_) + server_->wait_for_start(); +#ifdef CROW_ENABLE_SSL + else if (ssl_server_) + ssl_server_->wait_for_start(); +#endif + } + + private: + template + std::tuple make_middleware_tuple(Ts&&... ts) + { + auto fwd = std::forward_as_tuple((ts)...); + return std::make_tuple( + std::forward( + black_magic::tuple_extract(fwd))...); + } + + public: + /// Notify anything using `wait_for_server_start()` to proceed + void notify_server_start() + { + std::unique_lock lock(start_mutex_); + server_started_ = true; + cv_started_.notify_all(); + } + + + private: + std::uint8_t timeout_{5}; + uint16_t port_ = 80; + uint16_t concurrency_ = 2; + uint64_t max_payload_{UINT64_MAX}; + bool validated_ = false; + std::string server_name_ = std::string("Crow/") + VERSION; + std::string bindaddr_ = "0.0.0.0"; + size_t res_stream_threshold_ = 1048576; + Router router_; + +#ifdef CROW_ENABLE_COMPRESSION + compression::algorithm comp_algorithm_; + bool compression_used_{false}; +#endif + + std::chrono::milliseconds tick_interval_; + std::function tick_function_; + + std::tuple middlewares_; + +#ifdef CROW_ENABLE_SSL + std::unique_ptr ssl_server_; + bool ssl_used_{false}; + ssl_context_t ssl_context_{asio::ssl::context::sslv23}; +#endif + + std::unique_ptr server_; + + std::vector signals_{SIGINT, SIGTERM}; + + bool server_started_{false}; + std::condition_variable cv_started_; + std::mutex start_mutex_; + std::vector websockets_; + }; + template + using App = Crow; + using SimpleApp = Crow<>; +} // namespace crow diff --git a/src/lib/crow/ci_map.h b/src/lib/crow/ci_map.h new file mode 100644 index 0000000..ab18e3d --- /dev/null +++ b/src/lib/crow/ci_map.h @@ -0,0 +1,41 @@ +#pragma once + +#include +#include +#include "crow/utility.h" + +namespace crow +{ + /// Hashing function for ci_map (unordered_multimap). + struct ci_hash + { + size_t operator()(const std::string& key) const + { + std::size_t seed = 0; + std::locale locale; + + for (auto c : key) + hash_combine(seed, std::toupper(c, locale)); + + return seed; + } + + private: + static inline void hash_combine(std::size_t& seed, char v) + { + std::hash hasher; + seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2); + } + }; + + /// Equals function for ci_map (unordered_multimap). + struct ci_key_eq + { + bool operator()(const std::string& l, const std::string& r) const + { + return utility::string_equals(l, r); + } + }; + + using ci_map = std::unordered_multimap; +} // namespace crow diff --git a/src/lib/crow/common.h b/src/lib/crow/common.h new file mode 100644 index 0000000..2e5d44b --- /dev/null +++ b/src/lib/crow/common.h @@ -0,0 +1,356 @@ +#pragma once + +#include +#include +#include +#include +#include "crow/utility.h" + +namespace crow +{ + const char cr = '\r'; + const char lf = '\n'; + const std::string crlf("\r\n"); + + enum class HTTPMethod : char + { +#ifndef DELETE + DELETE = 0, + GET, + HEAD, + POST, + PUT, + + CONNECT, + OPTIONS, + TRACE, + + PATCH, + PURGE, + + COPY, + LOCK, + MKCOL, + MOVE, + PROPFIND, + PROPPATCH, + SEARCH, + UNLOCK, + BIND, + REBIND, + UNBIND, + ACL, + + REPORT, + MKACTIVITY, + CHECKOUT, + MERGE, + + MSEARCH, + NOTIFY, + SUBSCRIBE, + UNSUBSCRIBE, + + MKCALENDAR, + + LINK, + UNLINK, + + SOURCE, +#endif + + Delete = 0, + Get, + Head, + Post, + Put, + + Connect, + Options, + Trace, + + Patch, + Purge, + + Copy, + Lock, + MkCol, + Move, + Propfind, + Proppatch, + Search, + Unlock, + Bind, + Rebind, + Unbind, + Acl, + + Report, + MkActivity, + Checkout, + Merge, + + MSearch, + Notify, + Subscribe, + Unsubscribe, + + MkCalendar, + + Link, + Unlink, + + Source, + + + InternalMethodCount, + // should not add an item below this line: used for array count + }; + + constexpr const char* method_strings[] = + { + "DELETE", + "GET", + "HEAD", + "POST", + "PUT", + + "CONNECT", + "OPTIONS", + "TRACE", + + "PATCH", + "PURGE", + + "COPY", + "LOCK", + "MKCOL", + "MOVE", + "PROPFIND", + "PROPPATCH", + "SEARCH", + "UNLOCK", + "BIND", + "REBIND", + "UNBIND", + "ACL", + + "REPORT", + "MKACTIVITY", + "CHECKOUT", + "MERGE", + + "M-SEARCH", + "NOTIFY", + "SUBSCRIBE", + "UNSUBSCRIBE", + + "MKCALENDAR", + + "LINK", + "UNLINK", + + "SOURCE"}; + + + inline std::string method_name(HTTPMethod method) + { + if (CROW_LIKELY(method < HTTPMethod::InternalMethodCount)) + { + return method_strings[(unsigned char)method]; + } + return "invalid"; + } + + // clang-format off + + enum status + { + CONTINUE = 100, + SWITCHING_PROTOCOLS = 101, + + OK = 200, + CREATED = 201, + ACCEPTED = 202, + NON_AUTHORITATIVE_INFORMATION = 203, + NO_CONTENT = 204, + RESET_CONTENT = 205, + PARTIAL_CONTENT = 206, + + MULTIPLE_CHOICES = 300, + MOVED_PERMANENTLY = 301, + FOUND = 302, + SEE_OTHER = 303, + NOT_MODIFIED = 304, + TEMPORARY_REDIRECT = 307, + PERMANENT_REDIRECT = 308, + + BAD_REQUEST = 400, + UNAUTHORIZED = 401, + FORBIDDEN = 403, + NOT_FOUND = 404, + METHOD_NOT_ALLOWED = 405, + PROXY_AUTHENTICATION_REQUIRED = 407, + CONFLICT = 409, + GONE = 410, + PAYLOAD_TOO_LARGE = 413, + UNSUPPORTED_MEDIA_TYPE = 415, + RANGE_NOT_SATISFIABLE = 416, + EXPECTATION_FAILED = 417, + PRECONDITION_REQUIRED = 428, + TOO_MANY_REQUESTS = 429, + UNAVAILABLE_FOR_LEGAL_REASONS = 451, + + INTERNAL_SERVER_ERROR = 500, + NOT_IMPLEMENTED = 501, + BAD_GATEWAY = 502, + SERVICE_UNAVAILABLE = 503, + GATEWAY_TIMEOUT = 504, + VARIANT_ALSO_NEGOTIATES = 506 + }; + + // clang-format on + + enum class ParamType : char + { + INT, + UINT, + DOUBLE, + STRING, + PATH, + + MAX + }; + + /// @cond SKIP + struct routing_params + { + std::vector int_params; + std::vector uint_params; + std::vector double_params; + std::vector string_params; + + void debug_print() const + { + /* + std::cerr << "routing_params" << std::endl; + for (auto i : int_params) + std::cerr << i << ", "; + std::cerr << std::endl; + for (auto i : uint_params) + std::cerr << i << ", "; + std::cerr << std::endl; + for (auto i : double_params) + std::cerr << i << ", "; + std::cerr << std::endl; + for (auto& i : string_params) + std::cerr << i << ", "; + std::cerr << std::endl; + */ + } + + template + T get(unsigned) const; + }; + + template<> + inline int64_t routing_params::get(unsigned index) const + { + return int_params[index]; + } + + template<> + inline uint64_t routing_params::get(unsigned index) const + { + return uint_params[index]; + } + + template<> + inline double routing_params::get(unsigned index) const + { + return double_params[index]; + } + + template<> + inline std::string routing_params::get(unsigned index) const + { + return string_params[index]; + } + /// @endcond + + struct routing_handle_result + { + uint16_t rule_index; + std::vector blueprint_indices; + routing_params r_params; + HTTPMethod method; + + routing_handle_result() {} + + routing_handle_result(uint16_t rule_index_, std::vector blueprint_indices_, routing_params r_params_): + rule_index(rule_index_), + blueprint_indices(blueprint_indices_), + r_params(r_params_) {} + + routing_handle_result(uint16_t rule_index_, std::vector blueprint_indices_, routing_params r_params_, HTTPMethod method_): + rule_index(rule_index_), + blueprint_indices(blueprint_indices_), + r_params(r_params_), + method(method_) {} + }; +} // namespace crow + +// clang-format off +#ifndef CROW_MSVC_WORKAROUND +constexpr crow::HTTPMethod method_from_string(const char* str) +{ + return crow::black_magic::is_equ_p(str, "GET", 3) ? crow::HTTPMethod::Get : + crow::black_magic::is_equ_p(str, "DELETE", 6) ? crow::HTTPMethod::Delete : + crow::black_magic::is_equ_p(str, "HEAD", 4) ? crow::HTTPMethod::Head : + crow::black_magic::is_equ_p(str, "POST", 4) ? crow::HTTPMethod::Post : + crow::black_magic::is_equ_p(str, "PUT", 3) ? crow::HTTPMethod::Put : + + crow::black_magic::is_equ_p(str, "OPTIONS", 7) ? crow::HTTPMethod::Options : + crow::black_magic::is_equ_p(str, "CONNECT", 7) ? crow::HTTPMethod::Connect : + crow::black_magic::is_equ_p(str, "TRACE", 5) ? crow::HTTPMethod::Trace : + + crow::black_magic::is_equ_p(str, "PATCH", 5) ? crow::HTTPMethod::Patch : + crow::black_magic::is_equ_p(str, "PURGE", 5) ? crow::HTTPMethod::Purge : + crow::black_magic::is_equ_p(str, "COPY", 4) ? crow::HTTPMethod::Copy : + crow::black_magic::is_equ_p(str, "LOCK", 4) ? crow::HTTPMethod::Lock : + crow::black_magic::is_equ_p(str, "MKCOL", 5) ? crow::HTTPMethod::MkCol : + crow::black_magic::is_equ_p(str, "MOVE", 4) ? crow::HTTPMethod::Move : + crow::black_magic::is_equ_p(str, "PROPFIND", 8) ? crow::HTTPMethod::Propfind : + crow::black_magic::is_equ_p(str, "PROPPATCH", 9) ? crow::HTTPMethod::Proppatch : + crow::black_magic::is_equ_p(str, "SEARCH", 6) ? crow::HTTPMethod::Search : + crow::black_magic::is_equ_p(str, "UNLOCK", 6) ? crow::HTTPMethod::Unlock : + crow::black_magic::is_equ_p(str, "BIND", 4) ? crow::HTTPMethod::Bind : + crow::black_magic::is_equ_p(str, "REBIND", 6) ? crow::HTTPMethod::Rebind : + crow::black_magic::is_equ_p(str, "UNBIND", 6) ? crow::HTTPMethod::Unbind : + crow::black_magic::is_equ_p(str, "ACL", 3) ? crow::HTTPMethod::Acl : + + crow::black_magic::is_equ_p(str, "REPORT", 6) ? crow::HTTPMethod::Report : + crow::black_magic::is_equ_p(str, "MKACTIVITY", 10) ? crow::HTTPMethod::MkActivity : + crow::black_magic::is_equ_p(str, "CHECKOUT", 8) ? crow::HTTPMethod::Checkout : + crow::black_magic::is_equ_p(str, "MERGE", 5) ? crow::HTTPMethod::Merge : + + crow::black_magic::is_equ_p(str, "MSEARCH", 7) ? crow::HTTPMethod::MSearch : + crow::black_magic::is_equ_p(str, "NOTIFY", 6) ? crow::HTTPMethod::Notify : + crow::black_magic::is_equ_p(str, "SUBSCRIBE", 9) ? crow::HTTPMethod::Subscribe : + crow::black_magic::is_equ_p(str, "UNSUBSCRIBE", 11) ? crow::HTTPMethod::Unsubscribe : + + crow::black_magic::is_equ_p(str, "MKCALENDAR", 10) ? crow::HTTPMethod::MkCalendar : + + crow::black_magic::is_equ_p(str, "LINK", 4) ? crow::HTTPMethod::Link : + crow::black_magic::is_equ_p(str, "UNLINK", 6) ? crow::HTTPMethod::Unlink : + + crow::black_magic::is_equ_p(str, "SOURCE", 6) ? crow::HTTPMethod::Source : + throw std::runtime_error("invalid http method"); +} + +constexpr crow::HTTPMethod operator"" _method(const char* str, size_t /*len*/) +{ + return method_from_string( str ); +} +#endif +// clang-format on diff --git a/src/lib/crow/compression.h b/src/lib/crow/compression.h new file mode 100644 index 0000000..c33cb42 --- /dev/null +++ b/src/lib/crow/compression.h @@ -0,0 +1,99 @@ +#ifdef CROW_ENABLE_COMPRESSION +#pragma once + +#include +#include + +// http://zlib.net/manual.html +namespace crow +{ + namespace compression + { + // Values used in the 'windowBits' parameter for deflateInit2. + enum algorithm + { + // 15 is the default value for deflate + DEFLATE = 15, + // windowBits can also be greater than 15 for optional gzip encoding. + // Add 16 to windowBits to write a simple gzip header and trailer around the compressed data instead of a zlib wrapper. + GZIP = 15 | 16, + }; + + inline std::string compress_string(std::string const& str, algorithm algo) + { + std::string compressed_str; + z_stream stream{}; + // Initialize with the default values + if (::deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, algo, 8, Z_DEFAULT_STRATEGY) == Z_OK) + { + char buffer[8192]; + + stream.avail_in = str.size(); + // zlib does not take a const pointer. The data is not altered. + stream.next_in = const_cast(reinterpret_cast(str.c_str())); + + int code = Z_OK; + do + { + stream.avail_out = sizeof(buffer); + stream.next_out = reinterpret_cast(&buffer[0]); + + code = ::deflate(&stream, Z_FINISH); + // Successful and non-fatal error code returned by deflate when used with Z_FINISH flush + if (code == Z_OK || code == Z_STREAM_END) + { + std::copy(&buffer[0], &buffer[sizeof(buffer) - stream.avail_out], std::back_inserter(compressed_str)); + } + + } while (code == Z_OK); + + if (code != Z_STREAM_END) + compressed_str.clear(); + + ::deflateEnd(&stream); + } + + return compressed_str; + } + + inline std::string decompress_string(std::string const& deflated_string) + { + std::string inflated_string; + Bytef tmp[8192]; + + z_stream zstream{}; + zstream.avail_in = deflated_string.size(); + // Nasty const_cast but zlib won't alter its contents + zstream.next_in = const_cast(reinterpret_cast(deflated_string.c_str())); + // Initialize with automatic header detection, for gzip support + if (::inflateInit2(&zstream, MAX_WBITS | 32) == Z_OK) + { + do + { + zstream.avail_out = sizeof(tmp); + zstream.next_out = &tmp[0]; + + auto ret = ::inflate(&zstream, Z_NO_FLUSH); + if (ret == Z_OK || ret == Z_STREAM_END) + { + std::copy(&tmp[0], &tmp[sizeof(tmp) - zstream.avail_out], std::back_inserter(inflated_string)); + } + else + { + // Something went wrong with inflate; make sure we return an empty string + inflated_string.clear(); + break; + } + + } while (zstream.avail_out == 0); + + // Free zlib's internal memory + ::inflateEnd(&zstream); + } + + return inflated_string; + } + } // namespace compression +} // namespace crow + +#endif diff --git a/src/lib/crow/http_connection.h b/src/lib/crow/http_connection.h new file mode 100644 index 0000000..c059ce8 --- /dev/null +++ b/src/lib/crow/http_connection.h @@ -0,0 +1,619 @@ +#pragma once +#ifndef ASIO_STANDALONE +#define ASIO_STANDALONE +#endif +#include +#include +#include +#include +#include +#include + +#include "crow/http_parser_merged.h" +#include "crow/common.h" +#include "crow/parser.h" +#include "crow/http_response.h" +#include "crow/logging.h" +#include "crow/settings.h" +#include "crow/task_timer.h" +#include "crow/middleware_context.h" +#include "crow/middleware.h" +#include "crow/socket_adaptors.h" +#include "crow/compression.h" +#include "crow/utility.h" + +namespace crow +{ + using tcp = asio::ip::tcp; + + +#ifdef CROW_ENABLE_DEBUG + static std::atomic connectionCount; +#endif + + /// An HTTP connection. + template + class Connection: public std::enable_shared_from_this> + { + friend struct crow::response; + + public: + Connection( + asio::io_service& io_service, + Handler* handler, + const std::string& server_name, + std::tuple* middlewares, + std::function& get_cached_date_str_f, + detail::task_timer& task_timer, + typename Adaptor::context* adaptor_ctx_, + std::atomic& queue_length): + adaptor_(io_service, adaptor_ctx_), + handler_(handler), + parser_(this), + req_(parser_.req), + server_name_(server_name), + middlewares_(middlewares), + get_cached_date_str(get_cached_date_str_f), + task_timer_(task_timer), + res_stream_threshold_(handler->stream_threshold()), + queue_length_(queue_length) + { +#ifdef CROW_ENABLE_DEBUG + connectionCount++; + CROW_LOG_DEBUG << "Connection (" << this << ") allocated, total: " << connectionCount; +#endif + } + + ~Connection() + { +#ifdef CROW_ENABLE_DEBUG + connectionCount--; + CROW_LOG_DEBUG << "Connection (" << this << ") freed, total: " << connectionCount; +#endif + } + + /// The TCP socket on top of which the connection is established. + decltype(std::declval().raw_socket())& socket() + { + return adaptor_.raw_socket(); + } + + void start() + { + auto self = this->shared_from_this(); + adaptor_.start([self](const asio::error_code& ec) { + if (!ec) + { + self->start_deadline(); + self->parser_.clear(); + + self->do_read(); + } + else + { + CROW_LOG_ERROR << "Could not start adaptor: " << ec.message(); + } + }); + } + + void handle_url() + { + routing_handle_result_ = handler_->handle_initial(req_, res); + // if no route is found for the request method, return the response without parsing or processing anything further. + if (!routing_handle_result_->rule_index) + { + parser_.done(); + complete_request(); + } + } + + void handle_header() + { + // HTTP 1.1 Expect: 100-continue + if (req_.http_ver_major == 1 && req_.http_ver_minor == 1 && get_header_value(req_.headers, "expect") == "100-continue") + { + continue_requested = true; + buffers_.clear(); + static std::string expect_100_continue = "HTTP/1.1 100 Continue\r\n\r\n"; + buffers_.emplace_back(expect_100_continue.data(), expect_100_continue.size()); + do_write(); + } + } + + void handle() + { + // TODO(EDev): cancel_deadline_timer should be looked into, it might be a good idea to add it to handle_url() and then restart the timer once everything passes + cancel_deadline_timer(); + bool is_invalid_request = false; + add_keep_alive_ = false; + + req_.remote_ip_address = adaptor_.remote_endpoint().address().to_string(); + + add_keep_alive_ = req_.keep_alive; + close_connection_ = req_.close_connection; + + if (req_.check_version(1, 1)) // HTTP/1.1 + { + if (!req_.headers.count("host")) + { + is_invalid_request = true; + res = response(400); + } + else if (req_.upgrade) + { + // h2 or h2c headers + if (req_.get_header_value("upgrade").substr(0, 2) == "h2") + { + // TODO(ipkn): HTTP/2 + // currently, ignore upgrade header + } + else + { + close_connection_ = true; + handler_->handle_upgrade(req_, res, std::move(adaptor_)); + return; + } + } + } + + CROW_LOG_INFO << "Request: " << utility::lexical_cast(adaptor_.remote_endpoint()) << " " << this << " HTTP/" << (char)(req_.http_ver_major + '0') << "." << (char)(req_.http_ver_minor + '0') << ' ' << method_name(req_.method) << " " << req_.url; + + + need_to_call_after_handlers_ = false; + if (!is_invalid_request) + { + res.complete_request_handler_ = nullptr; + auto self = this->shared_from_this(); + res.is_alive_helper_ = [self]() -> bool { + return self->adaptor_.is_open(); + }; + + ctx_ = detail::context(); + req_.middleware_context = static_cast(&ctx_); + req_.middleware_container = static_cast(middlewares_); + req_.io_service = &adaptor_.get_io_service(); + + detail::middleware_call_helper({}, *middlewares_, req_, res, ctx_); + + if (!res.completed_) + { + auto self = this->shared_from_this(); + res.complete_request_handler_ = [self] { + self->complete_request(); + }; + need_to_call_after_handlers_ = true; + handler_->handle(req_, res, routing_handle_result_); + if (add_keep_alive_) + res.set_header("connection", "Keep-Alive"); + } + else + { + complete_request(); + } + } + else + { + complete_request(); + } + } + + /// Call the after handle middleware and send the write the response to the connection. + void complete_request() + { + CROW_LOG_INFO << "Response: " << this << ' ' << req_.raw_url << ' ' << res.code << ' ' << close_connection_; + res.is_alive_helper_ = nullptr; + + if (need_to_call_after_handlers_) + { + need_to_call_after_handlers_ = false; + + // call all after_handler of middlewares + detail::after_handlers_call_helper< + detail::middleware_call_criteria_only_global, + (static_cast(sizeof...(Middlewares)) - 1), + decltype(ctx_), + decltype(*middlewares_)>({}, *middlewares_, ctx_, req_, res); + } +#ifdef CROW_ENABLE_COMPRESSION + if (handler_->compression_used()) + { + std::string accept_encoding = req_.get_header_value("Accept-Encoding"); + if (!accept_encoding.empty() && res.compressed) + { + switch (handler_->compression_algorithm()) + { + case compression::DEFLATE: + if (accept_encoding.find("deflate") != std::string::npos) + { + res.body = compression::compress_string(res.body, compression::algorithm::DEFLATE); + res.set_header("Content-Encoding", "deflate"); + } + break; + case compression::GZIP: + if (accept_encoding.find("gzip") != std::string::npos) + { + res.body = compression::compress_string(res.body, compression::algorithm::GZIP); + res.set_header("Content-Encoding", "gzip"); + } + break; + default: + break; + } + } + } +#endif + //if there is a redirection with a partial URL, treat the URL as a route. + std::string location = res.get_header_value("Location"); + if (!location.empty() && location.find("://", 0) == std::string::npos) + { +#ifdef CROW_ENABLE_SSL + if (handler_->ssl_used()) + location.insert(0, "https://" + req_.get_header_value("Host")); + else +#endif + location.insert(0, "http://" + req_.get_header_value("Host")); + res.set_header("location", location); + } + + prepare_buffers(); + + if (res.is_static_type()) + { + do_write_static(); + } + else + { + do_write_general(); + } + } + + private: + void prepare_buffers() + { + res.complete_request_handler_ = nullptr; + res.is_alive_helper_ = nullptr; + + if (!adaptor_.is_open()) + { + //CROW_LOG_DEBUG << this << " delete (socket is closed) " << is_reading << ' ' << is_writing; + //delete this; + return; + } + // TODO(EDev): HTTP version in status codes should be dynamic + // Keep in sync with common.h/status + static std::unordered_map statusCodes = { + {status::CONTINUE, "HTTP/1.1 100 Continue\r\n"}, + {status::SWITCHING_PROTOCOLS, "HTTP/1.1 101 Switching Protocols\r\n"}, + + {status::OK, "HTTP/1.1 200 OK\r\n"}, + {status::CREATED, "HTTP/1.1 201 Created\r\n"}, + {status::ACCEPTED, "HTTP/1.1 202 Accepted\r\n"}, + {status::NON_AUTHORITATIVE_INFORMATION, "HTTP/1.1 203 Non-Authoritative Information\r\n"}, + {status::NO_CONTENT, "HTTP/1.1 204 No Content\r\n"}, + {status::RESET_CONTENT, "HTTP/1.1 205 Reset Content\r\n"}, + {status::PARTIAL_CONTENT, "HTTP/1.1 206 Partial Content\r\n"}, + + {status::MULTIPLE_CHOICES, "HTTP/1.1 300 Multiple Choices\r\n"}, + {status::MOVED_PERMANENTLY, "HTTP/1.1 301 Moved Permanently\r\n"}, + {status::FOUND, "HTTP/1.1 302 Found\r\n"}, + {status::SEE_OTHER, "HTTP/1.1 303 See Other\r\n"}, + {status::NOT_MODIFIED, "HTTP/1.1 304 Not Modified\r\n"}, + {status::TEMPORARY_REDIRECT, "HTTP/1.1 307 Temporary Redirect\r\n"}, + {status::PERMANENT_REDIRECT, "HTTP/1.1 308 Permanent Redirect\r\n"}, + + {status::BAD_REQUEST, "HTTP/1.1 400 Bad Request\r\n"}, + {status::UNAUTHORIZED, "HTTP/1.1 401 Unauthorized\r\n"}, + {status::FORBIDDEN, "HTTP/1.1 403 Forbidden\r\n"}, + {status::NOT_FOUND, "HTTP/1.1 404 Not Found\r\n"}, + {status::METHOD_NOT_ALLOWED, "HTTP/1.1 405 Method Not Allowed\r\n"}, + {status::PROXY_AUTHENTICATION_REQUIRED, "HTTP/1.1 407 Proxy Authentication Required\r\n"}, + {status::CONFLICT, "HTTP/1.1 409 Conflict\r\n"}, + {status::GONE, "HTTP/1.1 410 Gone\r\n"}, + {status::PAYLOAD_TOO_LARGE, "HTTP/1.1 413 Payload Too Large\r\n"}, + {status::UNSUPPORTED_MEDIA_TYPE, "HTTP/1.1 415 Unsupported Media Type\r\n"}, + {status::RANGE_NOT_SATISFIABLE, "HTTP/1.1 416 Range Not Satisfiable\r\n"}, + {status::EXPECTATION_FAILED, "HTTP/1.1 417 Expectation Failed\r\n"}, + {status::PRECONDITION_REQUIRED, "HTTP/1.1 428 Precondition Required\r\n"}, + {status::TOO_MANY_REQUESTS, "HTTP/1.1 429 Too Many Requests\r\n"}, + {status::UNAVAILABLE_FOR_LEGAL_REASONS, "HTTP/1.1 451 Unavailable For Legal Reasons\r\n"}, + + {status::INTERNAL_SERVER_ERROR, "HTTP/1.1 500 Internal Server Error\r\n"}, + {status::NOT_IMPLEMENTED, "HTTP/1.1 501 Not Implemented\r\n"}, + {status::BAD_GATEWAY, "HTTP/1.1 502 Bad Gateway\r\n"}, + {status::SERVICE_UNAVAILABLE, "HTTP/1.1 503 Service Unavailable\r\n"}, + {status::GATEWAY_TIMEOUT, "HTTP/1.1 504 Gateway Timeout\r\n"}, + {status::VARIANT_ALSO_NEGOTIATES, "HTTP/1.1 506 Variant Also Negotiates\r\n"}, + }; + + static const std::string seperator = ": "; + + buffers_.clear(); + buffers_.reserve(4 * (res.headers.size() + 5) + 3); + + if (!statusCodes.count(res.code)) + { + CROW_LOG_WARNING << this << " status code " + << "(" << res.code << ")" + << " not defined, returning 500 instead"; + res.code = 500; + } + + auto& status = statusCodes.find(res.code)->second; + buffers_.emplace_back(status.data(), status.size()); + + if (res.code >= 400 && res.body.empty()) + res.body = statusCodes[res.code].substr(9); + + for (auto& kv : res.headers) + { + buffers_.emplace_back(kv.first.data(), kv.first.size()); + buffers_.emplace_back(seperator.data(), seperator.size()); + buffers_.emplace_back(kv.second.data(), kv.second.size()); + buffers_.emplace_back(crlf.data(), crlf.size()); + } + + if (!res.manual_length_header && !res.headers.count("content-length")) + { + content_length_ = std::to_string(res.body.size()); + static std::string content_length_tag = "Content-Length: "; + buffers_.emplace_back(content_length_tag.data(), content_length_tag.size()); + buffers_.emplace_back(content_length_.data(), content_length_.size()); + buffers_.emplace_back(crlf.data(), crlf.size()); + } + if (!res.headers.count("server")) + { + static std::string server_tag = "Server: "; + buffers_.emplace_back(server_tag.data(), server_tag.size()); + buffers_.emplace_back(server_name_.data(), server_name_.size()); + buffers_.emplace_back(crlf.data(), crlf.size()); + } + if (!res.headers.count("date")) + { + static std::string date_tag = "Date: "; + date_str_ = get_cached_date_str(); + buffers_.emplace_back(date_tag.data(), date_tag.size()); + buffers_.emplace_back(date_str_.data(), date_str_.size()); + buffers_.emplace_back(crlf.data(), crlf.size()); + } + if (add_keep_alive_) + { + static std::string keep_alive_tag = "Connection: Keep-Alive"; + buffers_.emplace_back(keep_alive_tag.data(), keep_alive_tag.size()); + buffers_.emplace_back(crlf.data(), crlf.size()); + } + + buffers_.emplace_back(crlf.data(), crlf.size()); + } + + void do_write_static() + { + asio::write(adaptor_.socket(), buffers_); + + if (res.file_info.statResult == 0) + { + std::ifstream is(res.file_info.path.c_str(), std::ios::in | std::ios::binary); + std::vector buffers{1}; + char buf[16384]; + is.read(buf, sizeof(buf)); + while (is.gcount() > 0) + { + buffers[0] = asio::buffer(buf, is.gcount()); + do_write_sync(buffers); + is.read(buf, sizeof(buf)); + } + } + if (close_connection_) + { + adaptor_.shutdown_readwrite(); + adaptor_.close(); + CROW_LOG_DEBUG << this << " from write (static)"; + } + + res.end(); + res.clear(); + buffers_.clear(); + parser_.clear(); + } + + void do_write_general() + { + if (res.body.length() < res_stream_threshold_) + { + res_body_copy_.swap(res.body); + buffers_.emplace_back(res_body_copy_.data(), res_body_copy_.size()); + + do_write(); + + if (need_to_start_read_after_complete_) + { + need_to_start_read_after_complete_ = false; + start_deadline(); + do_read(); + } + } + else + { + asio::write(adaptor_.socket(), buffers_); // Write the response start / headers + cancel_deadline_timer(); + if (res.body.length() > 0) + { + std::vector buffers{1}; + const uint8_t *data = reinterpret_cast(res.body.data()); + size_t length = res.body.length(); + for(size_t transferred = 0; transferred < length;) + { + size_t to_transfer = CROW_MIN(16384UL, length-transferred); + buffers[0] = asio::const_buffer(data+transferred, to_transfer); + do_write_sync(buffers); + transferred += to_transfer; + } + } + if (close_connection_) + { + adaptor_.shutdown_readwrite(); + adaptor_.close(); + CROW_LOG_DEBUG << this << " from write (res_stream)"; + } + + res.end(); + res.clear(); + buffers_.clear(); + parser_.clear(); + } + } + + void do_read() + { + auto self = this->shared_from_this(); + adaptor_.socket().async_read_some( + asio::buffer(buffer_), + [self](const asio::error_code& ec, std::size_t bytes_transferred) { + bool error_while_reading = true; + if (!ec) + { + bool ret = self->parser_.feed(self->buffer_.data(), bytes_transferred); + if (ret && self->adaptor_.is_open()) + { + error_while_reading = false; + } + } + + if (error_while_reading) + { + self->cancel_deadline_timer(); + self->parser_.done(); + self->adaptor_.shutdown_read(); + self->adaptor_.close(); + CROW_LOG_DEBUG << self << " from read(1) with description: \"" << http_errno_description(static_cast(self->parser_.http_errno)) << '\"'; + } + else if (self->close_connection_) + { + self->cancel_deadline_timer(); + self->parser_.done(); + // adaptor will close after write + } + else if (!self->need_to_call_after_handlers_) + { + self->start_deadline(); + self->do_read(); + } + else + { + // res will be completed later by user + self->need_to_start_read_after_complete_ = true; + } + }); + } + + void do_write() + { + auto self = this->shared_from_this(); + asio::async_write( + adaptor_.socket(), buffers_, + [self](const asio::error_code& ec, std::size_t /*bytes_transferred*/) { + self->res.clear(); + self->res_body_copy_.clear(); + if (!self->continue_requested) + { + self->parser_.clear(); + } + else + { + self->continue_requested = false; + } + + if (!ec) + { + if (self->close_connection_) + { + self->adaptor_.shutdown_write(); + self->adaptor_.close(); + CROW_LOG_DEBUG << self << " from write(1)"; + } + } + else + { + CROW_LOG_DEBUG << self << " from write(2)"; + } + }); + } + + inline void do_write_sync(std::vector& buffers) + { + + asio::write(adaptor_.socket(), buffers, [&](asio::error_code ec, std::size_t) { + if (!ec) + { + return false; + } + else + { + CROW_LOG_ERROR << ec << " - happened while sending buffers"; + CROW_LOG_DEBUG << this << " from write (sync)(2)"; + return true; + } + }); + } + + void cancel_deadline_timer() + { + CROW_LOG_DEBUG << this << " timer cancelled: " << &task_timer_ << ' ' << task_id_; + task_timer_.cancel(task_id_); + } + + void start_deadline(/*int timeout = 5*/) + { + cancel_deadline_timer(); + + auto self = this->shared_from_this(); + task_id_ = task_timer_.schedule([self] { + if (!self->adaptor_.is_open()) + { + return; + } + self->adaptor_.shutdown_readwrite(); + self->adaptor_.close(); + }); + CROW_LOG_DEBUG << this << " timer added: " << &task_timer_ << ' ' << task_id_; + } + + private: + Adaptor adaptor_; + Handler* handler_; + + std::array buffer_; + + HTTPParser parser_; + std::unique_ptr routing_handle_result_; + request& req_; + response res; + + bool close_connection_ = false; + + const std::string& server_name_; + std::vector buffers_; + + std::string content_length_; + std::string date_str_; + std::string res_body_copy_; + + detail::task_timer::identifier_type task_id_{}; + + bool continue_requested{}; + bool need_to_call_after_handlers_{}; + bool need_to_start_read_after_complete_{}; + bool add_keep_alive_{}; + + std::tuple* middlewares_; + detail::context ctx_; + + std::function& get_cached_date_str; + detail::task_timer& task_timer_; + + size_t res_stream_threshold_; + + std::atomic& queue_length_; + }; + +} // namespace crow diff --git a/src/lib/crow/http_parser_merged.h b/src/lib/crow/http_parser_merged.h new file mode 100644 index 0000000..3e3ce9c --- /dev/null +++ b/src/lib/crow/http_parser_merged.h @@ -0,0 +1,2008 @@ +/* merged revision: 5b951d74bd66ec9d38448e0a85b1cf8b85d97db3 */ +/* updated to : e13b274770da9b82a1085dec29182acfea72e7a7 (beyond v2.9.5) */ +/* commits not included: + * 091ebb87783a58b249062540bbea07de2a11e9cf + * 6132d1fefa03f769a3979355d1f5da0b8889cad2 + * 7ba312397c2a6c851a4b5efe6c1603b1e1bda6ff + * d7675453a6c03180572f084e95eea0d02df39164 + * dff604db203986e532e5a679bafd0e7382c6bdd9 (Might be useful to actually add [upgrade requests with a body]) + * e01811e7f4894d7f0f7f4bd8492cccec6f6b4038 (related to above) + * 05525c5fde1fc562481f6ae08fa7056185325daf (also related to above) + * 350258965909f249f9c59823aac240313e0d0120 (cannot be implemented due to upgrade) + */ + +// clang-format off +#pragma once +extern "C" { +#include +#if defined(_WIN32) && !defined(__MINGW32__) && \ + (!defined(_MSC_VER) || _MSC_VER<1600) && !defined(__WINE__) +#include +typedef __int8 int8_t; +typedef unsigned __int8 uint8_t; +typedef __int16 int16_t; +typedef unsigned __int16 uint16_t; +typedef __int32 int32_t; +typedef unsigned __int32 uint32_t; +typedef __int64 int64_t; +typedef unsigned __int64 uint64_t; +#elif (defined(__sun) || defined(__sun__)) && defined(__SunOS_5_9) +#include +#else +#include +#endif +#include +#include +#include +#include +} + +#include "crow/common.h" +namespace crow +{ +/* Maximium header size allowed. If the macro is not defined + * before including this header then the default is used. To + * change the maximum header size, define the macro in the build + * environment (e.g. -DHTTP_MAX_HEADER_SIZE=). To remove + * the effective limit on the size of the header, define the macro + * to a very large number (e.g. -DCROW_HTTP_MAX_HEADER_SIZE=0x7fffffff) + */ +#ifndef CROW_HTTP_MAX_HEADER_SIZE +# define CROW_HTTP_MAX_HEADER_SIZE (80*1024) +#endif + +typedef struct http_parser http_parser; +typedef struct http_parser_settings http_parser_settings; + +/* Callbacks should return non-zero to indicate an error. The parser will + * then halt execution. + * + * The one exception is on_headers_complete. In a HTTP_RESPONSE parser + * returning '1' from on_headers_complete will tell the parser that it + * should not expect a body. This is used when receiving a response to a + * HEAD request which may contain 'Content-Length' or 'Transfer-Encoding: + * chunked' headers that indicate the presence of a body. + * + * Returning `2` from on_headers_complete will tell parser that it should not + * expect neither a body nor any futher responses on this connection. This is + * useful for handling responses to a CONNECT request which may not contain + * `Upgrade` or `Connection: upgrade` headers. + * + * http_data_cb does not return data chunks. It will be called arbitrarally + * many times for each string. E.G. you might get 10 callbacks for "on_url" + * each providing just a few characters more data. + */ +typedef int (*http_data_cb) (http_parser*, const char *at, size_t length); +typedef int (*http_cb) (http_parser*); + + +/* Flag values for http_parser.flags field */ +enum http_connection_flags // This is basically 7 booleans placed into 1 integer. Uses 4 bytes instead of n bytes (7 currently). + { F_CHUNKED = 1 << 0 // 00000000 00000000 00000000 00000001 + , F_CONNECTION_KEEP_ALIVE = 1 << 1 // 00000000 00000000 00000000 00000010 + , F_CONNECTION_CLOSE = 1 << 2 // 00000000 00000000 00000000 00000100 + , F_TRAILING = 1 << 3 // 00000000 00000000 00000000 00001000 + , F_UPGRADE = 1 << 4 // 00000000 00000000 00000000 00010000 + , F_SKIPBODY = 1 << 5 // 00000000 00000000 00000000 00100000 + , F_CONTENTLENGTH = 1 << 6 // 00000000 00000000 00000000 01000000 + }; + + +/* Map for errno-related constants + * + * The provided argument should be a macro that takes 2 arguments. + */ +#define CROW_HTTP_ERRNO_MAP(CROW_XX) \ + /* No error */ \ + CROW_XX(OK, "success") \ + \ + /* Callback-related errors */ \ + CROW_XX(CB_message_begin, "the on_message_begin callback failed") \ + CROW_XX(CB_method, "the on_method callback failed") \ + CROW_XX(CB_url, "the \"on_url\" callback failed") \ + CROW_XX(CB_header_field, "the \"on_header_field\" callback failed") \ + CROW_XX(CB_header_value, "the \"on_header_value\" callback failed") \ + CROW_XX(CB_headers_complete, "the \"on_headers_complete\" callback failed") \ + CROW_XX(CB_body, "the \"on_body\" callback failed") \ + CROW_XX(CB_message_complete, "the \"on_message_complete\" callback failed") \ + CROW_XX(CB_status, "the \"on_status\" callback failed") \ + \ + /* Parsing-related errors */ \ + CROW_XX(INVALID_EOF_STATE, "stream ended at an unexpected time") \ + CROW_XX(HEADER_OVERFLOW, "too many header bytes seen; overflow detected") \ + CROW_XX(CLOSED_CONNECTION, "data received after completed connection: close message") \ + CROW_XX(INVALID_VERSION, "invalid HTTP version") \ + CROW_XX(INVALID_STATUS, "invalid HTTP status code") \ + CROW_XX(INVALID_METHOD, "invalid HTTP method") \ + CROW_XX(INVALID_URL, "invalid URL") \ + CROW_XX(INVALID_HOST, "invalid host") \ + CROW_XX(INVALID_PORT, "invalid port") \ + CROW_XX(INVALID_PATH, "invalid path") \ + CROW_XX(INVALID_QUERY_STRING, "invalid query string") \ + CROW_XX(INVALID_FRAGMENT, "invalid fragment") \ + CROW_XX(LF_EXPECTED, "LF character expected") \ + CROW_XX(INVALID_HEADER_TOKEN, "invalid character in header") \ + CROW_XX(INVALID_CONTENT_LENGTH, "invalid character in content-length header") \ + CROW_XX(UNEXPECTED_CONTENT_LENGTH, "unexpected content-length header") \ + CROW_XX(INVALID_CHUNK_SIZE, "invalid character in chunk size header") \ + CROW_XX(INVALID_CONSTANT, "invalid constant string") \ + CROW_XX(INVALID_INTERNAL_STATE, "encountered unexpected internal state") \ + CROW_XX(STRICT, "strict mode assertion failed") \ + CROW_XX(UNKNOWN, "an unknown error occurred") \ + CROW_XX(INVALID_TRANSFER_ENCODING, "request has invalid transfer-encoding") \ + + +/* Define CHPE_* values for each errno value above */ +#define CROW_HTTP_ERRNO_GEN(n, s) CHPE_##n, +enum http_errno { + CROW_HTTP_ERRNO_MAP(CROW_HTTP_ERRNO_GEN) +}; +#undef CROW_HTTP_ERRNO_GEN + + +/* Get an http_errno value from an http_parser */ +#define CROW_HTTP_PARSER_ERRNO(p) ((enum http_errno)(p)->http_errno) + + + struct http_parser + { + /** PRIVATE **/ + unsigned int flags : 7; /* F_* values from 'flags' enum; semi-public */ + unsigned int state : 8; /* enum state from http_parser.c */ + unsigned int header_state : 7; /* enum header_state from http_parser.c */ + unsigned int index : 5; /* index into current matcher */ + unsigned int uses_transfer_encoding : 1; /* Transfer-Encoding header is present */ + unsigned int allow_chunked_length : 1; /* Allow headers with both `Content-Length` and `Transfer-Encoding: chunked` set */ + unsigned int lenient_http_headers : 1; + + uint32_t nread; /* # bytes read in various scenarios */ + uint64_t content_length; /* # bytes in body. `(uint64_t) -1` (all bits one) if no Content-Length header. */ + unsigned long qs_point; + + /** READ-ONLY **/ + unsigned char http_major; + unsigned char http_minor; + unsigned int method : 8; /* requests only */ + unsigned int http_errno : 7; + + /* 1 = Upgrade header was present and the parser has exited because of that. + * 0 = No upgrade header present. + * Should be checked when http_parser_execute() returns in addition to + * error checking. + */ + unsigned int upgrade : 1; + + /** PUBLIC **/ + void* data; /* A pointer to get hook to the "connection" or "socket" object */ + }; + + + struct http_parser_settings + { + http_cb on_message_begin; + http_cb on_method; + http_data_cb on_url; + http_data_cb on_header_field; + http_data_cb on_header_value; + http_cb on_headers_complete; + http_data_cb on_body; + http_cb on_message_complete; + }; + + + +// SOURCE (.c) CODE +static uint32_t max_header_size = CROW_HTTP_MAX_HEADER_SIZE; + +#ifndef CROW_ULLONG_MAX +# define CROW_ULLONG_MAX ((uint64_t) -1) /* 2^64-1 */ +#endif + +#ifndef CROW_MIN +# define CROW_MIN(a,b) ((a) < (b) ? (a) : (b)) +#endif + +#ifndef CROW_ARRAY_SIZE +# define CROW_ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) +#endif + +#ifndef CROW_BIT_AT +# define CROW_BIT_AT(a, i) \ + (!!((unsigned int) (a)[(unsigned int) (i) >> 3] & \ + (1 << ((unsigned int) (i) & 7)))) +#endif + +#define CROW_SET_ERRNO(e) \ +do { \ + parser->nread = nread; \ + parser->http_errno = (e); \ +} while(0) + +/* Run the notify callback FOR, returning ER if it fails */ +#define CROW_CALLBACK_NOTIFY_(FOR, ER) \ +do { \ + assert(CROW_HTTP_PARSER_ERRNO(parser) == CHPE_OK); \ + \ + if (CROW_LIKELY(settings->on_##FOR)) { \ + if (CROW_UNLIKELY(0 != settings->on_##FOR(parser))) { \ + CROW_SET_ERRNO(CHPE_CB_##FOR); \ + } \ + \ + /* We either errored above or got paused; get out */ \ + if (CROW_UNLIKELY(CROW_HTTP_PARSER_ERRNO(parser) != CHPE_OK)) { \ + return (ER); \ + } \ + } \ +} while (0) + +/* Run the notify callback FOR and consume the current byte */ +#define CROW_CALLBACK_NOTIFY(FOR) CROW_CALLBACK_NOTIFY_(FOR, p - data + 1) + +/* Run the notify callback FOR and don't consume the current byte */ +#define CROW_CALLBACK_NOTIFY_NOADVANCE(FOR) CROW_CALLBACK_NOTIFY_(FOR, p - data) + +/* Run data callback FOR with LEN bytes, returning ER if it fails */ +#define CROW_CALLBACK_DATA_(FOR, LEN, ER) \ +do { \ + assert(CROW_HTTP_PARSER_ERRNO(parser) == CHPE_OK); \ + \ + if (FOR##_mark) { \ + if (CROW_LIKELY(settings->on_##FOR)) { \ + if (CROW_UNLIKELY(0 != \ + settings->on_##FOR(parser, FOR##_mark, (LEN)))) { \ + CROW_SET_ERRNO(CHPE_CB_##FOR); \ + } \ + \ + /* We either errored above or got paused; get out */ \ + if (CROW_UNLIKELY(CROW_HTTP_PARSER_ERRNO(parser) != CHPE_OK)) {\ + return (ER); \ + } \ + } \ + FOR##_mark = NULL; \ + } \ +} while (0) + +/* Run the data callback FOR and consume the current byte */ +#define CROW_CALLBACK_DATA(FOR) \ + CROW_CALLBACK_DATA_(FOR, p - FOR##_mark, p - data + 1) + +/* Run the data callback FOR and don't consume the current byte */ +#define CROW_CALLBACK_DATA_NOADVANCE(FOR) \ + CROW_CALLBACK_DATA_(FOR, p - FOR##_mark, p - data) + +/* Set the mark FOR; non-destructive if mark is already set */ +#define CROW_MARK(FOR) \ +do { \ + if (!FOR##_mark) { \ + FOR##_mark = p; \ + } \ +} while (0) + +/* Don't allow the total size of the HTTP headers (including the status + * line) to exceed max_header_size. This check is here to protect + * embedders against denial-of-service attacks where the attacker feeds + * us a never-ending header that the embedder keeps buffering. + * + * This check is arguably the responsibility of embedders but we're doing + * it on the embedder's behalf because most won't bother and this way we + * make the web a little safer. max_header_size is still far bigger + * than any reasonable request or response so this should never affect + * day-to-day operation. + */ +#define CROW_COUNT_HEADER_SIZE(V) \ +do { \ + nread += (uint32_t)(V); \ + if (CROW_UNLIKELY(nread > max_header_size)) { \ + CROW_SET_ERRNO(CHPE_HEADER_OVERFLOW); \ + goto error; \ + } \ +} while (0) +#define CROW_REEXECUTE() \ + goto reexecute; \ + +#define CROW_PROXY_CONNECTION "proxy-connection" +#define CROW_CONNECTION "connection" +#define CROW_CONTENT_LENGTH "content-length" +#define CROW_TRANSFER_ENCODING "transfer-encoding" +#define CROW_UPGRADE "upgrade" +#define CROW_CHUNKED "chunked" +#define CROW_KEEP_ALIVE "keep-alive" +#define CROW_CLOSE "close" + + + + enum state + { + s_dead = 1 /* important that this is > 0 */ + + , + s_start_req + + , + s_req_method, + s_req_spaces_before_url, + s_req_schema, + s_req_schema_slash, + s_req_schema_slash_slash, + s_req_server_start, + s_req_server, // } + s_req_server_with_at, // | + s_req_path, // | The parser recognizes how to switch between these states, + s_req_query_string_start, // | however it doesn't process them any differently. + s_req_query_string, // } + s_req_http_start, + s_req_http_H, + s_req_http_HT, + s_req_http_HTT, + s_req_http_HTTP, + s_req_http_I, + s_req_http_IC, + s_req_http_major, + s_req_http_dot, + s_req_http_minor, + s_req_http_end, + s_req_line_almost_done + + , + s_header_field_start, + s_header_field, + s_header_value_discard_ws, + s_header_value_discard_ws_almost_done, + s_header_value_discard_lws, + s_header_value_start, + s_header_value, + s_header_value_lws + + , + s_header_almost_done + + , + s_chunk_size_start, + s_chunk_size, + s_chunk_parameters, + s_chunk_size_almost_done + + , + s_headers_almost_done, + s_headers_done + + /* Important: 's_headers_done' must be the last 'header' state. All + * states beyond this must be 'body' states. It is used for overflow + * checking. See the CROW_PARSING_HEADER() macro. + */ + + , + s_chunk_data, + s_chunk_data_almost_done, + s_chunk_data_done + + , + s_body_identity, + s_body_identity_eof + + , + s_message_done + }; + + +#define CROW_PARSING_HEADER(state) (state <= s_headers_done) + + +enum header_states + { h_general = 0 + , h_C + , h_CO + , h_CON + + , h_matching_connection + , h_matching_proxy_connection + , h_matching_content_length + , h_matching_transfer_encoding + , h_matching_upgrade + + , h_connection + , h_content_length + , h_content_length_num + , h_content_length_ws + , h_transfer_encoding + , h_upgrade + + , h_matching_transfer_encoding_token_start + , h_matching_transfer_encoding_chunked + , h_matching_transfer_encoding_token + + , h_matching_connection_keep_alive + , h_matching_connection_close + + , h_transfer_encoding_chunked + , h_connection_keep_alive + , h_connection_close + }; + +enum http_host_state + { + s_http_host_dead = 1 + , s_http_userinfo_start + , s_http_userinfo + , s_http_host_start + , s_http_host_v6_start + , s_http_host + , s_http_host_v6 + , s_http_host_v6_end + , s_http_host_v6_zone_start + , s_http_host_v6_zone + , s_http_host_port_start + , s_http_host_port +}; + +/* Macros for character classes; depends on strict-mode */ +#define CROW_LOWER(c) (unsigned char)(c | 0x20) +#define CROW_IS_ALPHA(c) (CROW_LOWER(c) >= 'a' && CROW_LOWER(c) <= 'z') +#define CROW_IS_NUM(c) ((c) >= '0' && (c) <= '9') +#define CROW_IS_ALPHANUM(c) (CROW_IS_ALPHA(c) || CROW_IS_NUM(c)) +//#define CROW_IS_HEX(c) (CROW_IS_NUM(c) || (CROW_LOWER(c) >= 'a' && CROW_LOWER(c) <= 'f')) +#define CROW_IS_MARK(c) ((c) == '-' || (c) == '_' || (c) == '.' || \ + (c) == '!' || (c) == '~' || (c) == '*' || (c) == '\'' || (c) == '(' || \ + (c) == ')') +#define CROW_IS_USERINFO_CHAR(c) (CROW_IS_ALPHANUM(c) || CROW_IS_MARK(c) || (c) == '%' || \ + (c) == ';' || (c) == ':' || (c) == '&' || (c) == '=' || (c) == '+' || \ + (c) == '$' || (c) == ',') + +#define CROW_TOKEN(c) (tokens[(unsigned char)c]) +#define CROW_IS_URL_CHAR(c) (CROW_BIT_AT(normal_url_char, (unsigned char)c)) +//#define CROW_IS_HOST_CHAR(c) (CROW_IS_ALPHANUM(c) || (c) == '.' || (c) == '-') + + /** + * Verify that a char is a valid visible (printable) US-ASCII + * character or %x80-FF + **/ +#define CROW_IS_HEADER_CHAR(ch) \ + (ch == cr || ch == lf || ch == 9 || ((unsigned char)ch > 31 && ch != 127)) + +#define CROW_start_state s_start_req + +# define CROW_STRICT_CHECK(cond) \ +do { \ + if (cond) { \ + CROW_SET_ERRNO(CHPE_STRICT); \ + goto error; \ + } \ +} while (0) +#define CROW_NEW_MESSAGE() (CROW_start_state) + +/* Our URL parser. + * + * This is designed to be shared by http_parser_execute() for URL validation, + * hence it has a state transition + byte-for-byte interface. In addition, it + * is meant to be embedded in http_parser_parse_url(), which does the dirty + * work of turning state transitions URL components for its API. + * + * This function should only be invoked with non-space characters. It is + * assumed that the caller cares about (and can detect) the transition between + * URL and non-URL states by looking for these. + */ +inline enum state +parse_url_char(enum state s, const char ch, http_parser *parser, const char* url_mark, const char* p) +{ +# define CROW_T(v) 0 + + +static const uint8_t normal_url_char[32] = { +/* 0 nul 1 soh 2 stx 3 etx 4 eot 5 enq 6 ack 7 bel */ + 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0, +/* 8 bs 9 ht 10 nl 11 vt 12 np 13 cr 14 so 15 si */ + 0 |CROW_T(2)| 0 | 0 |CROW_T(16)| 0 | 0 | 0, +/* 16 dle 17 dc1 18 dc2 19 dc3 20 dc4 21 nak 22 syn 23 etb */ + 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0, +/* 24 can 25 em 26 sub 27 esc 28 fs 29 gs 30 rs 31 us */ + 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0, +/* 32 sp 33 ! 34 " 35 # 36 $ 37 % 38 & 39 ' */ + 0 | 2 | 4 | 0 | 16 | 32 | 64 | 128, +/* 40 ( 41 ) 42 * 43 + 44 , 45 - 46 . 47 / */ + 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, +/* 48 0 49 1 50 2 51 3 52 4 53 5 54 6 55 7 */ + 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, +/* 56 8 57 9 58 : 59 ; 60 < 61 = 62 > 63 ? */ + 1 | 2 | 4 | 8 | 16 | 32 | 64 | 0, +/* 64 @ 65 A 66 B 67 C 68 D 69 E 70 F 71 G */ + 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, +/* 72 H 73 I 74 J 75 K 76 L 77 M 78 N 79 O */ + 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, +/* 80 P 81 Q 82 R 83 S 84 CROW_T 85 U 86 V 87 W */ + 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, +/* 88 X 89 Y 90 Z 91 [ 92 \ 93 ] 94 ^ 95 _ */ + 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, +/* 96 ` 97 a 98 b 99 c 100 d 101 e 102 f 103 g */ + 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, +/* 104 h 105 i 106 j 107 k 108 l 109 m 110 n 111 o */ + 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, +/* 112 p 113 q 114 r 115 s 116 t 117 u 118 v 119 w */ + 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128, +/* 120 x 121 y 122 z 123 { 124 | 125 } 126 ~ 127 del */ + 1 | 2 | 4 | 8 | 16 | 32 | 64 | 0, }; + +#undef CROW_T + + if (ch == ' ' || ch == '\r' || ch == '\n') { + return s_dead; + } + if (ch == '\t' || ch == '\f') { + return s_dead; + } + + switch (s) { + case s_req_spaces_before_url: + /* Proxied requests are followed by scheme of an absolute URI (alpha). + * All methods except CONNECT are followed by '/' or '*'. + */ + + if (ch == '/' || ch == '*') { + return s_req_path; + } + + if (CROW_IS_ALPHA(ch)) { + return s_req_schema; + } + + break; + + case s_req_schema: + if (CROW_IS_ALPHA(ch)) { + return s; + } + + if (ch == ':') { + return s_req_schema_slash; + } + + break; + + case s_req_schema_slash: + if (ch == '/') { + return s_req_schema_slash_slash; + } + + break; + + case s_req_schema_slash_slash: + if (ch == '/') { + return s_req_server_start; + } + + break; + + case s_req_server_with_at: + if (ch == '@') { + return s_dead; + } + + /* fall through */ + case s_req_server_start: + case s_req_server: + if (ch == '/') { + return s_req_path; + } + + if (ch == '?') { + parser->qs_point = p - url_mark; + return s_req_query_string_start; + } + + if (ch == '@') { + return s_req_server_with_at; + } + + if (CROW_IS_USERINFO_CHAR(ch) || ch == '[' || ch == ']') { + return s_req_server; + } + + break; + + case s_req_path: + if (CROW_IS_URL_CHAR(ch)) { + return s; + } + else if (ch == '?') + { + parser->qs_point = p - url_mark; + return s_req_query_string_start; + } + + break; + + case s_req_query_string_start: + case s_req_query_string: + if (CROW_IS_URL_CHAR(ch)) { + return s_req_query_string; + } + else if (ch == '?') + { + return s_req_query_string; + } + + break; + + default: + break; + } + + /* We should never fall out of the switch above unless there's an error */ + return s_dead; +} + +inline size_t http_parser_execute (http_parser *parser, + const http_parser_settings *settings, + const char *data, + size_t len) +{ + +/* Tokens as defined by rfc 2616. Also lowercases them. + * token = 1* + * separators = "(" | ")" | "<" | ">" | "@" + * | "," | ";" | ":" | "\" | <"> + * | "/" | "[" | "]" | "?" | "=" + * | "{" | "}" | SP | HT + */ +static const char tokens[256] = { +/* 0 nul 1 soh 2 stx 3 etx 4 eot 5 enq 6 ack 7 bel */ + 0, 0, 0, 0, 0, 0, 0, 0, +/* 8 bs 9 ht 10 nl 11 vt 12 np 13 cr 14 so 15 si */ + 0, 0, 0, 0, 0, 0, 0, 0, +/* 16 dle 17 dc1 18 dc2 19 dc3 20 dc4 21 nak 22 syn 23 etb */ + 0, 0, 0, 0, 0, 0, 0, 0, +/* 24 can 25 em 26 sub 27 esc 28 fs 29 gs 30 rs 31 us */ + 0, 0, 0, 0, 0, 0, 0, 0, +/* 32 sp 33 ! 34 " 35 # 36 $ 37 % 38 & 39 ' */ + 0, '!', 0, '#', '$', '%', '&', '\'', +/* 40 ( 41 ) 42 * 43 + 44 , 45 - 46 . 47 / */ + 0, 0, '*', '+', 0, '-', '.', 0, +/* 48 0 49 1 50 2 51 3 52 4 53 5 54 6 55 7 */ + '0', '1', '2', '3', '4', '5', '6', '7', +/* 56 8 57 9 58 : 59 ; 60 < 61 = 62 > 63 ? */ + '8', '9', 0, 0, 0, 0, 0, 0, +/* 64 @ 65 A 66 B 67 C 68 D 69 E 70 F 71 G */ + 0, 'a', 'b', 'c', 'd', 'e', 'f', 'g', +/* 72 H 73 I 74 J 75 K 76 L 77 M 78 N 79 O */ + 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', +/* 80 P 81 Q 82 R 83 S 84 T 85 U 86 V 87 W */ + 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', +/* 88 X 89 Y 90 Z 91 [ 92 \ 93 ] 94 ^ 95 _ */ + 'x', 'y', 'z', 0, 0, 0, '^', '_', +/* 96 ` 97 a 98 b 99 c 100 d 101 e 102 f 103 g */ + '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', +/* 104 h 105 i 106 j 107 k 108 l 109 m 110 n 111 o */ + 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', +/* 112 p 113 q 114 r 115 s 116 t 117 u 118 v 119 w */ + 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', +/* 120 x 121 y 122 z 123 { 124 | 125 } 126 ~ 127 del */ + 'x', 'y', 'z', 0, '|', 0, '~', 0 }; + + +static const int8_t unhex[256] = + {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 + ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 + ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 + , 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1,-1,-1,-1,-1 + ,-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1 + ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 + ,-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1 + ,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 + }; + + + + char c, ch; + int8_t unhex_val; + const char *p = data; + const char *header_field_mark = 0; + const char *header_value_mark = 0; + const char *url_mark = 0; + const char *url_start_mark = 0; + const char *body_mark = 0; + const unsigned int lenient = parser->lenient_http_headers; + const unsigned int allow_chunked_length = parser->allow_chunked_length; + + uint32_t nread = parser->nread; + + /* We're in an error state. Don't bother doing anything. */ + if (CROW_HTTP_PARSER_ERRNO(parser) != CHPE_OK) { + return 0; + } + + if (len == 0) { + switch (parser->state) { + case s_body_identity_eof: + /* Use of CROW_CALLBACK_NOTIFY() here would erroneously return 1 byte read if we got paused. */ + CROW_CALLBACK_NOTIFY_NOADVANCE(message_complete); + return 0; + + case s_dead: + case s_start_req: + return 0; + + default: + CROW_SET_ERRNO(CHPE_INVALID_EOF_STATE); + return 1; + } + } + + + if (parser->state == s_header_field) + header_field_mark = data; + if (parser->state == s_header_value) + header_value_mark = data; + switch (parser->state) { + case s_req_path: + case s_req_schema: + case s_req_schema_slash: + case s_req_schema_slash_slash: + case s_req_server_start: + case s_req_server: + case s_req_server_with_at: + case s_req_query_string_start: + case s_req_query_string: + url_mark = data; + break; + default: + break; + } + + for (p=data; p != data + len; p++) { + ch = *p; + + if (CROW_PARSING_HEADER(parser->state)) + CROW_COUNT_HEADER_SIZE(1); + +reexecute: + switch (parser->state) { + + case s_dead: + /* this state is used after a 'Connection: close' message + * the parser will error out if it reads another message + */ + if (CROW_LIKELY(ch == cr || ch == lf)) + break; + + CROW_SET_ERRNO(CHPE_CLOSED_CONNECTION); + goto error; + + case s_start_req: + { + if (ch == cr || ch == lf) + break; + parser->flags = 0; + parser->uses_transfer_encoding = 0; + parser->content_length = CROW_ULLONG_MAX; + + if (CROW_UNLIKELY(!CROW_IS_ALPHA(ch))) { + CROW_SET_ERRNO(CHPE_INVALID_METHOD); + goto error; + } + + parser->method = 0; + parser->index = 1; + switch (ch) { + case 'A': parser->method = (unsigned)HTTPMethod::Acl; break; + case 'B': parser->method = (unsigned)HTTPMethod::Bind; break; + case 'C': parser->method = (unsigned)HTTPMethod::Connect; /* or COPY, CHECKOUT */ break; + case 'D': parser->method = (unsigned)HTTPMethod::Delete; break; + case 'G': parser->method = (unsigned)HTTPMethod::Get; break; + case 'H': parser->method = (unsigned)HTTPMethod::Head; break; + case 'L': parser->method = (unsigned)HTTPMethod::Lock; /* or LINK */ break; + case 'M': parser->method = (unsigned)HTTPMethod::MkCol; /* or MOVE, MKACTIVITY, MERGE, M-SEARCH, MKCALENDAR */ break; + case 'N': parser->method = (unsigned)HTTPMethod::Notify; break; + case 'O': parser->method = (unsigned)HTTPMethod::Options; break; + case 'P': parser->method = (unsigned)HTTPMethod::Post; /* or PROPFIND|PROPPATCH|PUT|PATCH|PURGE */ break; + case 'R': parser->method = (unsigned)HTTPMethod::Report; /* or REBIND */ break; + case 'S': parser->method = (unsigned)HTTPMethod::Subscribe; /* or SEARCH, SOURCE */ break; + case 'T': parser->method = (unsigned)HTTPMethod::Trace; break; + case 'U': parser->method = (unsigned)HTTPMethod::Unlock; /* or UNSUBSCRIBE, UNBIND, UNLINK */ break; + default: + CROW_SET_ERRNO(CHPE_INVALID_METHOD); + goto error; + } + parser->state = s_req_method; + + CROW_CALLBACK_NOTIFY(message_begin); + + break; + } + + case s_req_method: + { + const char *matcher; + if (CROW_UNLIKELY(ch == '\0')) { + CROW_SET_ERRNO(CHPE_INVALID_METHOD); + goto error; + } + + matcher = method_strings[parser->method]; + if (ch == ' ' && matcher[parser->index] == '\0') { + parser->state = s_req_spaces_before_url; + } else if (ch == matcher[parser->index]) { + ; /* nada */ + } else if ((ch >= 'A' && ch <= 'Z') || ch == '-') { + + switch (parser->method << 16 | parser->index << 8 | ch) { +#define CROW_XX(meth, pos, ch, new_meth) \ + case ((unsigned)HTTPMethod::meth << 16 | pos << 8 | ch): \ + parser->method = (unsigned)HTTPMethod::new_meth; break; + + CROW_XX(Post, 1, 'U', Put) + CROW_XX(Post, 1, 'A', Patch) + CROW_XX(Post, 1, 'R', Propfind) + CROW_XX(Put, 2, 'R', Purge) + CROW_XX(Connect, 1, 'H', Checkout) + CROW_XX(Connect, 2, 'P', Copy) + CROW_XX(MkCol, 1, 'O', Move) + CROW_XX(MkCol, 1, 'E', Merge) + CROW_XX(MkCol, 1, '-', MSearch) + CROW_XX(MkCol, 2, 'A', MkActivity) + CROW_XX(MkCol, 3, 'A', MkCalendar) + CROW_XX(Subscribe, 1, 'E', Search) + CROW_XX(Subscribe, 1, 'O', Source) + CROW_XX(Report, 2, 'B', Rebind) + CROW_XX(Propfind, 4, 'P', Proppatch) + CROW_XX(Lock, 1, 'I', Link) + CROW_XX(Unlock, 2, 'S', Unsubscribe) + CROW_XX(Unlock, 2, 'B', Unbind) + CROW_XX(Unlock, 3, 'I', Unlink) +#undef CROW_XX + default: + CROW_SET_ERRNO(CHPE_INVALID_METHOD); + goto error; + } + } else { + CROW_SET_ERRNO(CHPE_INVALID_METHOD); + goto error; + } + + CROW_CALLBACK_NOTIFY_NOADVANCE(method); + + ++parser->index; + break; + } + + case s_req_spaces_before_url: + { + if (ch == ' ') break; + + CROW_MARK(url); + CROW_MARK(url_start); + if (parser->method == (unsigned)HTTPMethod::Connect) { + parser->state = s_req_server_start; + } + + parser->state = parse_url_char(static_cast(parser->state), ch, parser, url_start_mark, p); + if (CROW_UNLIKELY(parser->state == s_dead)) { + CROW_SET_ERRNO(CHPE_INVALID_URL); + goto error; + } + + break; + } + + case s_req_schema: + case s_req_schema_slash: + case s_req_schema_slash_slash: + case s_req_server_start: + { + switch (ch) { + /* No whitespace allowed here */ + case ' ': + case cr: + case lf: + CROW_SET_ERRNO(CHPE_INVALID_URL); + goto error; + default: + parser->state = parse_url_char(static_cast(parser->state), ch, parser, url_start_mark, p); + if (CROW_UNLIKELY(parser->state == s_dead)) { + CROW_SET_ERRNO(CHPE_INVALID_URL); + goto error; + } + } + + break; + } + + case s_req_server: + case s_req_server_with_at: + case s_req_path: + case s_req_query_string_start: + case s_req_query_string: + { + switch (ch) { + case ' ': + parser->state = s_req_http_start; + CROW_CALLBACK_DATA(url); + break; + case cr: // No space after URL means no HTTP version. Which means the request is using HTTP/0.9 + case lf: + if (CROW_UNLIKELY(parser->method != (unsigned)HTTPMethod::Get)) // HTTP/0.9 doesn't define any method other than GET + { + parser->state = s_dead; + CROW_SET_ERRNO(CHPE_INVALID_VERSION); + goto error; + } + parser->http_major = 0; + parser->http_minor = 9; + parser->state = (ch == cr) ? + s_req_line_almost_done : + s_header_field_start; + CROW_CALLBACK_DATA(url); + break; + default: + parser->state = parse_url_char(static_cast(parser->state), ch, parser, url_start_mark, p); + if (CROW_UNLIKELY(parser->state == s_dead)) { + CROW_SET_ERRNO(CHPE_INVALID_URL); + goto error; + } + } + break; + } + + case s_req_http_start: + switch (ch) { + case ' ': + break; + case 'H': + parser->state = s_req_http_H; + break; + case 'I': + if (parser->method == (unsigned)HTTPMethod::Source) { + parser->state = s_req_http_I; + break; + } + /* fall through */ + default: + CROW_SET_ERRNO(CHPE_INVALID_CONSTANT); + goto error; + } + break; + + case s_req_http_H: + CROW_STRICT_CHECK(ch != 'T'); + parser->state = s_req_http_HT; + break; + + case s_req_http_HT: + CROW_STRICT_CHECK(ch != 'T'); + parser->state = s_req_http_HTT; + break; + + case s_req_http_HTT: + CROW_STRICT_CHECK(ch != 'P'); + parser->state = s_req_http_HTTP; + break; + + case s_req_http_I: + CROW_STRICT_CHECK(ch != 'C'); + parser->state = s_req_http_IC; + break; + + case s_req_http_IC: + CROW_STRICT_CHECK(ch != 'E'); + parser->state = s_req_http_HTTP; /* Treat "ICE" as "HTTP". */ + break; + + case s_req_http_HTTP: + CROW_STRICT_CHECK(ch != '/'); + parser->state = s_req_http_major; + break; + + /* dot */ + case s_req_http_major: + if (CROW_UNLIKELY(!CROW_IS_NUM(ch))) { + CROW_SET_ERRNO(CHPE_INVALID_VERSION); + goto error; + } + + parser->http_major = ch - '0'; + parser->state = s_req_http_dot; + break; + + case s_req_http_dot: + { + if (CROW_UNLIKELY(ch != '.')) { + CROW_SET_ERRNO(CHPE_INVALID_VERSION); + goto error; + } + + parser->state = s_req_http_minor; + break; + } + + /* minor HTTP version */ + case s_req_http_minor: + if (CROW_UNLIKELY(!CROW_IS_NUM(ch))) { + CROW_SET_ERRNO(CHPE_INVALID_VERSION); + goto error; + } + + parser->http_minor = ch - '0'; + parser->state = s_req_http_end; + break; + + /* end of request line */ + case s_req_http_end: + { + if (ch == cr) { + parser->state = s_req_line_almost_done; + break; + } + + if (ch == lf) { + parser->state = s_header_field_start; + break; + } + + CROW_SET_ERRNO(CHPE_INVALID_VERSION); + goto error; + break; + } + + /* end of request line */ + case s_req_line_almost_done: + { + if (CROW_UNLIKELY(ch != lf)) { + CROW_SET_ERRNO(CHPE_LF_EXPECTED); + goto error; + } + + parser->state = s_header_field_start; + break; + } + + case s_header_field_start: + { + if (ch == cr) { + parser->state = s_headers_almost_done; + break; + } + + if (ch == lf) { + /* they might be just sending \n instead of \r\n so this would be + * the second \n to denote the end of headers*/ + parser->state = s_headers_almost_done; + CROW_REEXECUTE(); + } + + c = CROW_TOKEN(ch); + + if (CROW_UNLIKELY(!c)) { + CROW_SET_ERRNO(CHPE_INVALID_HEADER_TOKEN); + goto error; + } + + CROW_MARK(header_field); + + parser->index = 0; + parser->state = s_header_field; + + switch (c) { + case 'c': + parser->header_state = h_C; + break; + + case 'p': + parser->header_state = h_matching_proxy_connection; + break; + + case 't': + parser->header_state = h_matching_transfer_encoding; + break; + + case 'u': + parser->header_state = h_matching_upgrade; + break; + + default: + parser->header_state = h_general; + break; + } + break; + } + + case s_header_field: + { + const char* start = p; + for (; p != data + len; p++) { + ch = *p; + c = CROW_TOKEN(ch); + + if (!c) + break; + + switch (parser->header_state) { + case h_general: { + size_t left = data + len - p; + const char* pe = p + CROW_MIN(left, max_header_size); + while (p+1 < pe && CROW_TOKEN(p[1])) { + p++; + } + break; + } + + case h_C: + parser->index++; + parser->header_state = (c == 'o' ? h_CO : h_general); + break; + + case h_CO: + parser->index++; + parser->header_state = (c == 'n' ? h_CON : h_general); + break; + + case h_CON: + parser->index++; + switch (c) { + case 'n': + parser->header_state = h_matching_connection; + break; + case 't': + parser->header_state = h_matching_content_length; + break; + default: + parser->header_state = h_general; + break; + } + break; + + /* connection */ + + case h_matching_connection: + parser->index++; + if (parser->index > sizeof(CROW_CONNECTION)-1 || c != CROW_CONNECTION[parser->index]) { + parser->header_state = h_general; + } else if (parser->index == sizeof(CROW_CONNECTION)-2) { + parser->header_state = h_connection; + } + break; + + /* proxy-connection */ + + case h_matching_proxy_connection: + parser->index++; + if (parser->index > sizeof(CROW_PROXY_CONNECTION)-1 || c != CROW_PROXY_CONNECTION[parser->index]) { + parser->header_state = h_general; + } else if (parser->index == sizeof(CROW_PROXY_CONNECTION)-2) { + parser->header_state = h_connection; + } + break; + + /* content-length */ + + case h_matching_content_length: + parser->index++; + if (parser->index > sizeof(CROW_CONTENT_LENGTH)-1 || c != CROW_CONTENT_LENGTH[parser->index]) { + parser->header_state = h_general; + } else if (parser->index == sizeof(CROW_CONTENT_LENGTH)-2) { + parser->header_state = h_content_length; + } + break; + + /* transfer-encoding */ + + case h_matching_transfer_encoding: + parser->index++; + if (parser->index > sizeof(CROW_TRANSFER_ENCODING)-1 || c != CROW_TRANSFER_ENCODING[parser->index]) { + parser->header_state = h_general; + } else if (parser->index == sizeof(CROW_TRANSFER_ENCODING)-2) { + parser->header_state = h_transfer_encoding; + parser->uses_transfer_encoding = 1; + } + break; + + /* upgrade */ + + case h_matching_upgrade: + parser->index++; + if (parser->index > sizeof(CROW_UPGRADE)-1 || c != CROW_UPGRADE[parser->index]) { + parser->header_state = h_general; + } else if (parser->index == sizeof(CROW_UPGRADE)-2) { + parser->header_state = h_upgrade; + } + break; + + case h_connection: + case h_content_length: + case h_transfer_encoding: + case h_upgrade: + if (ch != ' ') parser->header_state = h_general; + break; + + default: + assert(0 && "Unknown header_state"); + break; + } + } + + if (p == data + len) { + --p; + CROW_COUNT_HEADER_SIZE(p - start); + break; + } + + CROW_COUNT_HEADER_SIZE(p - start); + + if (ch == ':') { + parser->state = s_header_value_discard_ws; + CROW_CALLBACK_DATA(header_field); + break; + } +/* RFC-7230 Sec 3.2.4 expressly forbids line-folding in header field-names. + if (ch == cr) { + parser->state = s_header_almost_done; + CROW_CALLBACK_DATA(header_field); + break; + } + + if (ch == lf) { + parser->state = s_header_field_start; + CROW_CALLBACK_DATA(header_field); + break; + } +*/ + CROW_SET_ERRNO(CHPE_INVALID_HEADER_TOKEN); + goto error; + } + + case s_header_value_discard_ws: + if (ch == ' ' || ch == '\t') break; + + if (ch == cr) { + parser->state = s_header_value_discard_ws_almost_done; + break; + } + + if (ch == lf) { + parser->state = s_header_value_discard_lws; + break; + } + + /* fall through */ + + case s_header_value_start: + { + CROW_MARK(header_value); + + parser->state = s_header_value; + parser->index = 0; + + c = CROW_LOWER(ch); + + switch (parser->header_state) { + case h_upgrade: + parser->flags |= F_UPGRADE; + parser->header_state = h_general; + break; + + case h_transfer_encoding: + /* looking for 'Transfer-Encoding: chunked' */ + if ('c' == c) { + parser->header_state = h_matching_transfer_encoding_chunked; + } else { + parser->header_state = h_matching_transfer_encoding_token; + } + break; + + /* Multi-value `Transfer-Encoding` header */ + case h_matching_transfer_encoding_token_start: + break; + + case h_content_length: + if (CROW_UNLIKELY(!CROW_IS_NUM(ch))) { + CROW_SET_ERRNO(CHPE_INVALID_CONTENT_LENGTH); + goto error; + } + + if (parser->flags & F_CONTENTLENGTH) { + CROW_SET_ERRNO(CHPE_UNEXPECTED_CONTENT_LENGTH); + goto error; + } + parser->flags |= F_CONTENTLENGTH; + parser->content_length = ch - '0'; + parser->header_state = h_content_length_num; + break; + + /* when obsolete line folding is encountered for content length + * continue to the s_header_value state */ + case h_content_length_ws: + break; + + case h_connection: + /* looking for 'Connection: keep-alive' */ + if (c == 'k') { + parser->header_state = h_matching_connection_keep_alive; + /* looking for 'Connection: close' */ + } else if (c == 'c') { + parser->header_state = h_matching_connection_close; + } else if (c == ' ' || c == '\t') { + /* Skip lws */ + } else { + parser->header_state = h_general; + } + break; + + default: + parser->header_state = h_general; + break; + } + break; + } + + case s_header_value: + { + const char* start = p; + enum header_states h_state = static_cast(parser->header_state); + for (; p != data + len; p++) { + ch = *p; + + if (ch == cr) { + parser->state = s_header_almost_done; + parser->header_state = h_state; + CROW_CALLBACK_DATA(header_value); + break; + } + + if (ch == lf) { + parser->state = s_header_almost_done; + CROW_COUNT_HEADER_SIZE(p - start); + parser->header_state = h_state; + CROW_CALLBACK_DATA_NOADVANCE(header_value); + CROW_REEXECUTE(); + } + + if (!lenient && !CROW_IS_HEADER_CHAR(ch)) { + CROW_SET_ERRNO(CHPE_INVALID_HEADER_TOKEN); + goto error; + } + + c = CROW_LOWER(ch); + + switch (h_state) { + case h_general: + { + size_t left = data + len - p; + const char* pe = p + CROW_MIN(left, max_header_size); + + for (; p != pe; p++) { + ch = *p; + if (ch == cr || ch == lf) { + --p; + break; + } + if (!lenient && !CROW_IS_HEADER_CHAR(ch)) { + CROW_SET_ERRNO(CHPE_INVALID_HEADER_TOKEN); + goto error; + } + } + if (p == data + len) + --p; + break; + } + + case h_connection: + case h_transfer_encoding: + assert(0 && "Shouldn't get here."); + break; + + case h_content_length: + if (ch == ' ') break; + h_state = h_content_length_num; + /* fall through */ + + case h_content_length_num: + { + uint64_t t; + + if (ch == ' ') { + h_state = h_content_length_ws; + break; + } + + if (CROW_UNLIKELY(!CROW_IS_NUM(ch))) { + CROW_SET_ERRNO(CHPE_INVALID_CONTENT_LENGTH); + parser->header_state = h_state; + goto error; + } + + t = parser->content_length; + t *= 10; + t += ch - '0'; + + /* Overflow? Test against a conservative limit for simplicity. */ + if (CROW_UNLIKELY((CROW_ULLONG_MAX - 10) / 10 < parser->content_length)) { + CROW_SET_ERRNO(CHPE_INVALID_CONTENT_LENGTH); + parser->header_state = h_state; + goto error; + } + + parser->content_length = t; + break; + } + + case h_content_length_ws: + if (ch == ' ') break; + CROW_SET_ERRNO(CHPE_INVALID_CONTENT_LENGTH); + parser->header_state = h_state; + goto error; + + /* Transfer-Encoding: chunked */ + case h_matching_transfer_encoding_token_start: + /* looking for 'Transfer-Encoding: chunked' */ + if ('c' == c) { + h_state = h_matching_transfer_encoding_chunked; + } else if (CROW_TOKEN(c)) { + /* TODO(indutny): similar code below does this, but why? + * At the very least it seems to be inconsistent given that + * h_matching_transfer_encoding_token does not check for + * `STRICT_TOKEN` + */ + h_state = h_matching_transfer_encoding_token; + } else if (c == ' ' || c == '\t') { + /* Skip lws */ + } else { + h_state = h_general; + } + break; + + case h_matching_transfer_encoding_chunked: + parser->index++; + if (parser->index > sizeof(CROW_CHUNKED)-1 || c != CROW_CHUNKED[parser->index]) { + h_state = h_matching_transfer_encoding_token; + } else if (parser->index == sizeof(CROW_CHUNKED)-2) { + h_state = h_transfer_encoding_chunked; + } + break; + + case h_matching_transfer_encoding_token: + if (ch == ',') { + h_state = h_matching_transfer_encoding_token_start; + parser->index = 0; + } + break; + + /* looking for 'Connection: keep-alive' */ + case h_matching_connection_keep_alive: + parser->index++; + if (parser->index > sizeof(CROW_KEEP_ALIVE)-1 || c != CROW_KEEP_ALIVE[parser->index]) { + h_state = h_general; + } else if (parser->index == sizeof(CROW_KEEP_ALIVE)-2) { + h_state = h_connection_keep_alive; + } + break; + + /* looking for 'Connection: close' */ + case h_matching_connection_close: + parser->index++; + if (parser->index > sizeof(CROW_CLOSE)-1 || c != CROW_CLOSE[parser->index]) { + h_state = h_general; + } else if (parser->index == sizeof(CROW_CLOSE)-2) { + h_state = h_connection_close; + } + break; + + // Edited from original (because of commits that werent included) + case h_transfer_encoding_chunked: + if (ch != ' ') h_state = h_matching_transfer_encoding_token; + break; + case h_connection_keep_alive: + case h_connection_close: + if (ch != ' ') h_state = h_general; + break; + + default: + parser->state = s_header_value; + h_state = h_general; + break; + } + } + parser->header_state = h_state; + + + if (p == data + len) + --p; + + CROW_COUNT_HEADER_SIZE(p - start); + break; + } + + case s_header_almost_done: + { + if (CROW_UNLIKELY(ch != lf)) { + CROW_SET_ERRNO(CHPE_LF_EXPECTED); + goto error; + } + + parser->state = s_header_value_lws; + break; + } + + case s_header_value_lws: + { + if (ch == ' ' || ch == '\t') { + if (parser->header_state == h_content_length_num) { + /* treat obsolete line folding as space */ + parser->header_state = h_content_length_ws; + } + parser->state = s_header_value_start; + CROW_REEXECUTE(); + } + + /* finished the header */ + switch (parser->header_state) { + case h_connection_keep_alive: + parser->flags |= F_CONNECTION_KEEP_ALIVE; + break; + case h_connection_close: + parser->flags |= F_CONNECTION_CLOSE; + break; + case h_transfer_encoding_chunked: + parser->flags |= F_CHUNKED; + break; + default: + break; + } + + parser->state = s_header_field_start; + CROW_REEXECUTE(); + } + + case s_header_value_discard_ws_almost_done: + { + CROW_STRICT_CHECK(ch != lf); + parser->state = s_header_value_discard_lws; + break; + } + + case s_header_value_discard_lws: + { + if (ch == ' ' || ch == '\t') { + parser->state = s_header_value_discard_ws; + break; + } else { + /* header value was empty */ + CROW_MARK(header_value); + parser->state = s_header_field_start; + CROW_CALLBACK_DATA_NOADVANCE(header_value); + CROW_REEXECUTE(); + } + } + + case s_headers_almost_done: + { + CROW_STRICT_CHECK(ch != lf); + + if (parser->flags & F_TRAILING) { + /* End of a chunked request */ + CROW_CALLBACK_NOTIFY(message_complete); + break; + } + + /* Cannot use transfer-encoding and a content-length header together + per the HTTP specification. (RFC 7230 Section 3.3.3) */ + if ((parser->uses_transfer_encoding == 1) && + (parser->flags & F_CONTENTLENGTH)) { + /* Allow it for lenient parsing as long as `Transfer-Encoding` is + * not `chunked` or allow_length_with_encoding is set + */ + if (parser->flags & F_CHUNKED) { + if (!allow_chunked_length) { + CROW_SET_ERRNO(CHPE_UNEXPECTED_CONTENT_LENGTH); + goto error; + } + } else if (!lenient) { + CROW_SET_ERRNO(CHPE_UNEXPECTED_CONTENT_LENGTH); + goto error; + } + } + + parser->state = s_headers_done; + + /* Set this here so that on_headers_complete() callbacks can see it */ + parser->upgrade = + (parser->flags & F_UPGRADE || parser->method == (unsigned)HTTPMethod::Connect); + + /* Here we call the headers_complete callback. This is somewhat + * different than other callbacks because if the user returns 1, we + * will interpret that as saying that this message has no body. This + * is needed for the annoying case of recieving a response to a HEAD + * request. + * + * We'd like to use CROW_CALLBACK_NOTIFY_NOADVANCE() here but we cannot, so + * we have to simulate it by handling a change in errno below. + */ + if (settings->on_headers_complete) { + switch (settings->on_headers_complete(parser)) { + case 0: + break; + + case 2: + parser->upgrade = 1; + //break; + + /* fall through */ + case 1: + parser->flags |= F_SKIPBODY; + break; + + default: + CROW_SET_ERRNO(CHPE_CB_headers_complete); + parser->nread = nread; + return p - data; /* Error */ + } + } + + if (CROW_HTTP_PARSER_ERRNO(parser) != CHPE_OK) { + parser->nread = nread; + return p - data; + } + + CROW_REEXECUTE(); + } + + case s_headers_done: + { + CROW_STRICT_CHECK(ch != lf); + + parser->nread = 0; + nread = 0; + + /* Exit, the rest of the connect is in a different protocol. */ + if (parser->upgrade) { + CROW_CALLBACK_NOTIFY(message_complete); + parser->nread = nread; + return (p - data) + 1; + } + + if (parser->flags & F_SKIPBODY) { + CROW_CALLBACK_NOTIFY(message_complete); + } else if (parser->flags & F_CHUNKED) { + /* chunked encoding - ignore Content-Length header, + * prepare for a chunk */ + parser->state = s_chunk_size_start; + } + else if (parser->uses_transfer_encoding == 1) + { + if (!lenient) + { + /* RFC 7230 3.3.3 */ + + /* If a Transfer-Encoding header field + * is present in a request and the chunked transfer coding is not + * the final encoding, the message body length cannot be determined + * reliably; the server MUST respond with the 400 (Bad Request) + * status code and then close the connection. + */ + CROW_SET_ERRNO(CHPE_INVALID_TRANSFER_ENCODING); + parser->nread = nread; + return (p - data); /* Error */ + } + else + { + /* RFC 7230 3.3.3 */ + + /* If a Transfer-Encoding header field is present in a response and + * the chunked transfer coding is not the final encoding, the + * message body length is determined by reading the connection until + * it is closed by the server. + */ + parser->state = s_body_identity_eof; + } + } + else + { + if (parser->content_length == 0) + { + /* Content-Length header given but zero: Content-Length: 0\r\n */ + CROW_CALLBACK_NOTIFY(message_complete); + } + else if (parser->content_length != CROW_ULLONG_MAX) + { + /* Content-Length header given and non-zero */ + parser->state = s_body_identity; + } + else + { + /* Assume content-length 0 - read the next */ + CROW_CALLBACK_NOTIFY(message_complete); + } + } + + break; + } + + case s_body_identity: + { + uint64_t to_read = CROW_MIN(parser->content_length, + (uint64_t) ((data + len) - p)); + + assert(parser->content_length != 0 + && parser->content_length != CROW_ULLONG_MAX); + + /* The difference between advancing content_length and p is because + * the latter will automaticaly advance on the next loop iteration. + * Further, if content_length ends up at 0, we want to see the last + * byte again for our message complete callback. + */ + CROW_MARK(body); + parser->content_length -= to_read; + p += to_read - 1; + + if (parser->content_length == 0) { + parser->state = s_message_done; + + /* Mimic CROW_CALLBACK_DATA_NOADVANCE() but with one extra byte. + * + * The alternative to doing this is to wait for the next byte to + * trigger the data callback, just as in every other case. The + * problem with this is that this makes it difficult for the test + * harness to distinguish between complete-on-EOF and + * complete-on-length. It's not clear that this distinction is + * important for applications, but let's keep it for now. + */ + CROW_CALLBACK_DATA_(body, p - body_mark + 1, p - data); + CROW_REEXECUTE(); + } + + break; + } + + /* read until EOF */ + case s_body_identity_eof: + CROW_MARK(body); + p = data + len - 1; + + break; + + case s_message_done: + CROW_CALLBACK_NOTIFY(message_complete); + break; + + case s_chunk_size_start: + { + assert(nread == 1); + assert(parser->flags & F_CHUNKED); + + unhex_val = unhex[static_cast(ch)]; + if (CROW_UNLIKELY(unhex_val == -1)) { + CROW_SET_ERRNO(CHPE_INVALID_CHUNK_SIZE); + goto error; + } + + parser->content_length = unhex_val; + parser->state = s_chunk_size; + break; + } + + case s_chunk_size: + { + uint64_t t; + + assert(parser->flags & F_CHUNKED); + + if (ch == cr) { + parser->state = s_chunk_size_almost_done; + break; + } + + unhex_val = unhex[static_cast(ch)]; + + if (unhex_val == -1) { + if (ch == ';' || ch == ' ') { + parser->state = s_chunk_parameters; + break; + } + + CROW_SET_ERRNO(CHPE_INVALID_CHUNK_SIZE); + goto error; + } + + t = parser->content_length; + t *= 16; + t += unhex_val; + + /* Overflow? Test against a conservative limit for simplicity. */ + if (CROW_UNLIKELY((CROW_ULLONG_MAX - 16) / 16 < parser->content_length)) { + CROW_SET_ERRNO(CHPE_INVALID_CONTENT_LENGTH); + goto error; + } + + parser->content_length = t; + break; + } + + case s_chunk_parameters: + { + assert(parser->flags & F_CHUNKED); + /* just ignore this shit. TODO check for overflow */ + if (ch == cr) { + parser->state = s_chunk_size_almost_done; + break; + } + break; + } + + case s_chunk_size_almost_done: + { + assert(parser->flags & F_CHUNKED); + CROW_STRICT_CHECK(ch != lf); + + parser->nread = 0; + nread = 0; + + if (parser->content_length == 0) { + parser->flags |= F_TRAILING; + parser->state = s_header_field_start; + } else { + parser->state = s_chunk_data; + } + break; + } + + case s_chunk_data: + { + uint64_t to_read = CROW_MIN(parser->content_length, + (uint64_t) ((data + len) - p)); + + assert(parser->flags & F_CHUNKED); + assert(parser->content_length != 0 + && parser->content_length != CROW_ULLONG_MAX); + + /* See the explanation in s_body_identity for why the content + * length and data pointers are managed this way. + */ + CROW_MARK(body); + parser->content_length -= to_read; + p += to_read - 1; + + if (parser->content_length == 0) { + parser->state = s_chunk_data_almost_done; + } + + break; + } + + case s_chunk_data_almost_done: + assert(parser->flags & F_CHUNKED); + assert(parser->content_length == 0); + CROW_STRICT_CHECK(ch != cr); + parser->state = s_chunk_data_done; + CROW_CALLBACK_DATA(body); + break; + + case s_chunk_data_done: + assert(parser->flags & F_CHUNKED); + CROW_STRICT_CHECK(ch != lf); + parser->nread = 0; + nread = 0; + parser->state = s_chunk_size_start; + break; + + default: + assert(0 && "unhandled state"); + CROW_SET_ERRNO(CHPE_INVALID_INTERNAL_STATE); + goto error; + } + } + + /* Run callbacks for any marks that we have leftover after we ran out of + * bytes. There should be at most one of these set, so it's OK to invoke + * them in series (unset marks will not result in callbacks). + * + * We use the NOADVANCE() variety of callbacks here because 'p' has already + * overflowed 'data' and this allows us to correct for the off-by-one that + * we'd otherwise have (since CROW_CALLBACK_DATA() is meant to be run with a 'p' + * value that's in-bounds). + */ + + assert(((header_field_mark ? 1 : 0) + + (header_value_mark ? 1 : 0) + + (url_mark ? 1 : 0) + + (body_mark ? 1 : 0)) <= 1); + + CROW_CALLBACK_DATA_NOADVANCE(header_field); + CROW_CALLBACK_DATA_NOADVANCE(header_value); + CROW_CALLBACK_DATA_NOADVANCE(url); + CROW_CALLBACK_DATA_NOADVANCE(body); + + parser->nread = nread; + return len; + +error: + if (CROW_HTTP_PARSER_ERRNO(parser) == CHPE_OK) { + CROW_SET_ERRNO(CHPE_UNKNOWN); + } + + parser->nread = nread; + return (p - data); +} + +inline void + http_parser_init(http_parser* parser) +{ + void *data = parser->data; /* preserve application data */ + memset(parser, 0, sizeof(*parser)); + parser->data = data; + parser->state = s_start_req; + parser->http_errno = CHPE_OK; +} + +/* Return a string name of the given error */ +inline const char * +http_errno_name(enum http_errno err) { +/* Map errno values to strings for human-readable output */ +#define CROW_HTTP_STRERROR_GEN(n, s) { "CHPE_" #n, s }, +static struct { + const char *name; + const char *description; +} http_strerror_tab[] = { + CROW_HTTP_ERRNO_MAP(CROW_HTTP_STRERROR_GEN) +}; +#undef CROW_HTTP_STRERROR_GEN + assert(((size_t) err) < CROW_ARRAY_SIZE(http_strerror_tab)); + return http_strerror_tab[err].name; +} + +/* Return a string description of the given error */ +inline const char * +http_errno_description(enum http_errno err) { +/* Map errno values to strings for human-readable output */ +#define CROW_HTTP_STRERROR_GEN(n, s) { "CHPE_" #n, s }, +static struct { + const char *name; + const char *description; +} http_strerror_tab[] = { + CROW_HTTP_ERRNO_MAP(CROW_HTTP_STRERROR_GEN) +}; +#undef CROW_HTTP_STRERROR_GEN + assert(((size_t) err) < CROW_ARRAY_SIZE(http_strerror_tab)); + return http_strerror_tab[err].description; +} + +/* Checks if this is the final chunk of the body. */ +inline int +http_body_is_final(const struct http_parser *parser) { + return parser->state == s_message_done; +} + +/* Change the maximum header size provided at compile time. */ +inline void +http_parser_set_max_header_size(uint32_t size) { + max_header_size = size; +} + +#undef CROW_HTTP_ERRNO_MAP +#undef CROW_SET_ERRNO +#undef CROW_CALLBACK_NOTIFY_ +#undef CROW_CALLBACK_NOTIFY +#undef CROW_CALLBACK_NOTIFY_NOADVANCE +#undef CROW_CALLBACK_DATA_ +#undef CROW_CALLBACK_DATA +#undef CROW_CALLBACK_DATA_NOADVANCE +#undef CROW_MARK +#undef CROW_PROXY_CONNECTION +#undef CROW_CONNECTION +#undef CROW_CONTENT_LENGTH +#undef CROW_TRANSFER_ENCODING +#undef CROW_UPGRADE +#undef CROW_CHUNKED +#undef CROW_KEEP_ALIVE +#undef CROW_CLOSE +#undef CROW_PARSING_HEADER +#undef CROW_LOWER +#undef CROW_IS_ALPHA +#undef CROW_IS_NUM +#undef CROW_IS_ALPHANUM +//#undef CROW_IS_HEX +#undef CROW_IS_MARK +#undef CROW_IS_USERINFO_CHAR +#undef CROW_TOKEN +#undef CROW_IS_URL_CHAR +//#undef CROW_IS_HOST_CHAR +#undef CROW_STRICT_CHECK + +} + +// clang-format on diff --git a/src/lib/crow/http_request.h b/src/lib/crow/http_request.h new file mode 100644 index 0000000..6be82e7 --- /dev/null +++ b/src/lib/crow/http_request.h @@ -0,0 +1,93 @@ +#pragma once + +#ifndef ASIO_STANDALONE +#define ASIO_STANDALONE +#endif +#include + +#include "crow/common.h" +#include "crow/ci_map.h" +#include "crow/query_string.h" + +namespace crow +{ + /// Find and return the value associated with the key. (returns an empty string if nothing is found) + template + inline const std::string& get_header_value(const T& headers, const std::string& key) + { + if (headers.count(key)) + { + return headers.find(key)->second; + } + static std::string empty; + return empty; + } + + /// An HTTP request. + struct request + { + HTTPMethod method; + std::string raw_url; ///< The full URL containing the `?` and URL parameters. + std::string url; ///< The endpoint without any parameters. + query_string url_params; ///< The parameters associated with the request. (everything after the `?` in the URL) + ci_map headers; + std::string body; + std::string remote_ip_address; ///< The IP address from which the request was sent. + unsigned char http_ver_major, http_ver_minor; + bool keep_alive, ///< Whether or not the server should send a `connection: Keep-Alive` header to the client. + close_connection, ///< Whether or not the server should shut down the TCP connection once a response is sent. + upgrade; ///< Whether or noth the server should change the HTTP connection to a different connection. + + void* middleware_context{}; + void* middleware_container{}; + asio::io_service* io_service{}; + + /// Construct an empty request. (sets the method to `GET`) + request(): + method(HTTPMethod::Get) + {} + + /// Construct a request with all values assigned. + request(HTTPMethod method, std::string raw_url, std::string url, query_string url_params, ci_map headers, std::string body, unsigned char http_major, unsigned char http_minor, bool has_keep_alive, bool has_close_connection, bool is_upgrade): + method(method), raw_url(std::move(raw_url)), url(std::move(url)), url_params(std::move(url_params)), headers(std::move(headers)), body(std::move(body)), http_ver_major(http_major), http_ver_minor(http_minor), keep_alive(has_keep_alive), close_connection(has_close_connection), upgrade(is_upgrade) + {} + + void add_header(std::string key, std::string value) + { + headers.emplace(std::move(key), std::move(value)); + } + + const std::string& get_header_value(const std::string& key) const + { + return crow::get_header_value(headers, key); + } + + bool check_version(unsigned char major, unsigned char minor) const + { + return http_ver_major == major && http_ver_minor == minor; + } + + /// Get the body as parameters in QS format. + + /// + /// This is meant to be used with requests of type "application/x-www-form-urlencoded" + const query_string get_body_params() const + { + return query_string(body, false); + } + + /// Send data to whoever made this request with a completion handler and return immediately. + template + void post(CompletionHandler handler) + { + io_service->post(handler); + } + + /// Send data to whoever made this request with a completion handler. + template + void dispatch(CompletionHandler handler) + { + io_service->dispatch(handler); + } + }; +} // namespace crow diff --git a/src/lib/crow/http_response.h b/src/lib/crow/http_response.h new file mode 100644 index 0000000..47d1dc1 --- /dev/null +++ b/src/lib/crow/http_response.h @@ -0,0 +1,325 @@ +#pragma once +#include +#include +#include +#include +#include +// S_ISREG is not defined for windows +// This defines it like suggested in https://stackoverflow.com/a/62371749 +#if defined(_MSC_VER) +#define _CRT_INTERNAL_NONSTDC_NAMES 1 +#endif +#include +#if !defined(S_ISREG) && defined(S_IFMT) && defined(S_IFREG) +#define S_ISREG(m) (((m)&S_IFMT) == S_IFREG) +#endif + +#include "crow/http_request.h" +#include "crow/ci_map.h" +#include "crow/socket_adaptors.h" +#include "crow/logging.h" +#include "crow/mime_types.h" +#include "crow/returnable.h" + + +namespace crow +{ + template + class Connection; + + class Router; + + /// HTTP response + struct response + { + template + friend class crow::Connection; + + friend class Router; + + int code{200}; ///< The Status code for the response. + std::string body; ///< The actual payload containing the response data. + ci_map headers; ///< HTTP headers. + +#ifdef CROW_ENABLE_COMPRESSION + bool compressed = true; ///< If compression is enabled and this is false, the individual response will not be compressed. +#endif + bool skip_body = false; ///< Whether this is a response to a HEAD request. + bool manual_length_header = false; ///< Whether Crow should automatically add a "Content-Length" header. + + /// Set the value of an existing header in the response. + void set_header(std::string key, std::string value) + { + headers.erase(key); + headers.emplace(std::move(key), std::move(value)); + } + + /// Add a new header to the response. + void add_header(std::string key, std::string value) + { + headers.emplace(std::move(key), std::move(value)); + } + + const std::string& get_header_value(const std::string& key) + { + return crow::get_header_value(headers, key); + } + + // naive validation of a mime-type string + static bool validate_mime_type(const std::string& candidate) noexcept + { + // Here we simply check that the candidate type starts with + // a valid parent type, and has at least one character afterwards. + std::array valid_parent_types = { + "application/", "audio/", "font/", "example/", + "image/", "message/", "model/", "multipart/", + "text/", "video/"}; + for (const std::string& parent : valid_parent_types) + { + // ensure the candidate is *longer* than the parent, + // to avoid unnecessary string comparison and to + // reject zero-length subtypes. + if (candidate.size() <= parent.size()) + { + continue; + } + // strncmp is used rather than substr to avoid allocation, + // but a string_view approach would be better if Crow + // migrates to C++17. + if (strncmp(parent.c_str(), candidate.c_str(), parent.size()) == 0) + { + return true; + } + } + return false; + } + + // Find the mime type from the content type either by lookup, + // or by the content type itself, if it is a valid a mime type. + // Defaults to text/plain. + static std::string get_mime_type(const std::string& contentType) + { + const auto mimeTypeIterator = mime_types.find(contentType); + if (mimeTypeIterator != mime_types.end()) + { + return mimeTypeIterator->second; + } + else if (validate_mime_type(contentType)) + { + return contentType; + } + else + { + CROW_LOG_WARNING << "Unable to interpret mime type for content type '" << contentType << "'. Defaulting to text/plain."; + return "text/plain"; + } + } + + + // clang-format off + response() {} + explicit response(int code) : code(code) {} + response(std::string body) : body(std::move(body)) {} + response(int code, std::string body) : code(code), body(std::move(body)) {} + // clang-format on + response(returnable&& value) + { + body = value.dump(); + set_header("Content-Type", value.content_type); + } + response(returnable& value) + { + body = value.dump(); + set_header("Content-Type", value.content_type); + } + response(int code, returnable& value): + code(code) + { + body = value.dump(); + set_header("Content-Type", value.content_type); + } + response(int code, returnable&& value): + code(code), body(value.dump()) + { + set_header("Content-Type", std::move(value.content_type)); + } + + response(response&& r) + { + *this = std::move(r); + } + + response(std::string contentType, std::string body): + body(std::move(body)) + { + set_header("Content-Type", get_mime_type(contentType)); + } + + response(int code, std::string contentType, std::string body): + code(code), body(std::move(body)) + { + set_header("Content-Type", get_mime_type(contentType)); + } + + response& operator=(const response& r) = delete; + + response& operator=(response&& r) noexcept + { + body = std::move(r.body); + code = r.code; + headers = std::move(r.headers); + completed_ = r.completed_; + file_info = std::move(r.file_info); + return *this; + } + + /// Check if the response has completed (whether response.end() has been called) + bool is_completed() const noexcept + { + return completed_; + } + + void clear() + { + body.clear(); + code = 200; + headers.clear(); + completed_ = false; + file_info = static_file_info{}; + } + + /// Return a "Temporary Redirect" response. + + /// + /// Location can either be a route or a full URL. + void redirect(const std::string& location) + { + code = 307; + set_header("Location", location); + } + + /// Return a "Permanent Redirect" response. + + /// + /// Location can either be a route or a full URL. + void redirect_perm(const std::string& location) + { + code = 308; + set_header("Location", location); + } + + /// Return a "Found (Moved Temporarily)" response. + + /// + /// Location can either be a route or a full URL. + void moved(const std::string& location) + { + code = 302; + set_header("Location", location); + } + + /// Return a "Moved Permanently" response. + + /// + /// Location can either be a route or a full URL. + void moved_perm(const std::string& location) + { + code = 301; + set_header("Location", location); + } + + void write(const std::string& body_part) + { + body += body_part; + } + + /// Set the response completion flag and call the handler (to send the response). + void end() + { + if (!completed_) + { + completed_ = true; + if (skip_body) + { + set_header("Content-Length", std::to_string(body.size())); + body = ""; + manual_length_header = true; + } + if (complete_request_handler_) + { + complete_request_handler_(); + } + } + } + + /// Same as end() except it adds a body part right before ending. + void end(const std::string& body_part) + { + body += body_part; + end(); + } + + /// Check if the connection is still alive (usually by checking the socket status). + bool is_alive() + { + return is_alive_helper_ && is_alive_helper_(); + } + + /// Check whether the response has a static file defined. + bool is_static_type() + { + return file_info.path.size(); + } + + /// This constains metadata (coming from the `stat` command) related to any static files associated with this response. + + /// + /// Either a static file or a string body can be returned as 1 response. + struct static_file_info + { + std::string path = ""; + struct stat statbuf; + int statResult; + }; + + /// Return a static file as the response body + void set_static_file_info(std::string path) + { + utility::sanitize_filename(path); + set_static_file_info_unsafe(path); + } + + /// Return a static file as the response body without sanitizing the path (use set_static_file_info instead) + void set_static_file_info_unsafe(std::string path) + { + file_info.path = path; + file_info.statResult = stat(file_info.path.c_str(), &file_info.statbuf); +#ifdef CROW_ENABLE_COMPRESSION + compressed = false; +#endif + if (file_info.statResult == 0 && S_ISREG(file_info.statbuf.st_mode)) + { + std::size_t last_dot = path.find_last_of("."); + std::string extension = path.substr(last_dot + 1); + code = 200; + this->add_header("Content-Length", std::to_string(file_info.statbuf.st_size)); + + if (!extension.empty()) + { + this->add_header("Content-Type", get_mime_type(extension)); + } + } + else + { + code = 404; + file_info.path.clear(); + } + } + + private: + bool completed_{}; + std::function complete_request_handler_; + std::function is_alive_helper_; + static_file_info file_info; + }; +} // namespace crow diff --git a/src/lib/crow/http_server.h b/src/lib/crow/http_server.h new file mode 100644 index 0000000..9defaa7 --- /dev/null +++ b/src/lib/crow/http_server.h @@ -0,0 +1,285 @@ +#pragma once + +#include +#ifndef ASIO_STANDALONE +#define ASIO_STANDALONE +#endif +#include +#ifdef CROW_ENABLE_SSL +#include +#endif +#include +#include +#include +#include +#include + +#include "crow/version.h" +#include "crow/http_connection.h" +#include "crow/logging.h" +#include "crow/task_timer.h" + +namespace crow +{ + using tcp = asio::ip::tcp; + + template + class Server + { + public: + Server(Handler* handler, std::string bindaddr, uint16_t port, std::string server_name = std::string("Crow/") + VERSION, std::tuple* middlewares = nullptr, uint16_t concurrency = 1, uint8_t timeout = 5, typename Adaptor::context* adaptor_ctx = nullptr): + acceptor_(io_service_, tcp::endpoint(asio::ip::address::from_string(bindaddr), port)), + signals_(io_service_), + tick_timer_(io_service_), + handler_(handler), + concurrency_(concurrency), + timeout_(timeout), + server_name_(server_name), + port_(port), + bindaddr_(bindaddr), + task_queue_length_pool_(concurrency_ - 1), + middlewares_(middlewares), + adaptor_ctx_(adaptor_ctx) + {} + + void set_tick_function(std::chrono::milliseconds d, std::function f) + { + tick_interval_ = d; + tick_function_ = f; + } + + void on_tick() + { + tick_function_(); + tick_timer_.expires_after(std::chrono::milliseconds(tick_interval_.count())); + tick_timer_.async_wait([this](const asio::error_code& ec) { + if (ec) + return; + on_tick(); + }); + } + + void run() + { + uint16_t worker_thread_count = concurrency_ - 1; + for (int i = 0; i < worker_thread_count; i++) + io_service_pool_.emplace_back(new asio::io_service()); + get_cached_date_str_pool_.resize(worker_thread_count); + task_timer_pool_.resize(worker_thread_count); + + std::vector> v; + std::atomic init_count(0); + for (uint16_t i = 0; i < worker_thread_count; i++) + v.push_back( + std::async( + std::launch::async, [this, i, &init_count] { + // thread local date string get function + auto last = std::chrono::steady_clock::now(); + + std::string date_str; + auto update_date_str = [&] { + auto last_time_t = time(0); + tm my_tm; + +#if defined(_MSC_VER) || defined(__MINGW32__) + gmtime_s(&my_tm, &last_time_t); +#else + gmtime_r(&last_time_t, &my_tm); +#endif + date_str.resize(100); + size_t date_str_sz = strftime(&date_str[0], 99, "%a, %d %b %Y %H:%M:%S GMT", &my_tm); + date_str.resize(date_str_sz); + }; + update_date_str(); + get_cached_date_str_pool_[i] = [&]() -> std::string { + if (std::chrono::steady_clock::now() - last >= std::chrono::seconds(1)) + { + last = std::chrono::steady_clock::now(); + update_date_str(); + } + return date_str; + }; + + // initializing task timers + detail::task_timer task_timer(*io_service_pool_[i]); + task_timer.set_default_timeout(timeout_); + task_timer_pool_[i] = &task_timer; + task_queue_length_pool_[i] = 0; + + init_count++; + while (1) + { + try + { + if (io_service_pool_[i]->run() == 0) + { + // when io_service.run returns 0, there are no more works to do. + break; + } + } + catch (std::exception& e) + { + CROW_LOG_ERROR << "Worker Crash: An uncaught exception occurred: " << e.what(); + } + } + })); + + if (tick_function_ && tick_interval_.count() > 0) + { + tick_timer_.expires_after(std::chrono::milliseconds(tick_interval_.count())); + tick_timer_.async_wait( + [this](const asio::error_code& ec) { + if (ec) + return; + on_tick(); + }); + } + + port_ = acceptor_.local_endpoint().port(); + handler_->port(port_); + + handler_->notify_server_start(); + CROW_LOG_INFO << server_name_ << " server is running at " << (handler_->ssl_used() ? "https://" : "http://") << bindaddr_ << ":" << acceptor_.local_endpoint().port() << " using " << concurrency_ << " threads"; + CROW_LOG_INFO << "Call `app.loglevel(crow::LogLevel::Warning)` to hide Info level logs."; + + signals_.async_wait( + [&](const asio::error_code& /*error*/, int /*signal_number*/) { + stop(); + }); + + while (worker_thread_count != init_count) + std::this_thread::yield(); + + do_accept(); + + std::thread( + [this] { + notify_start(); + io_service_.run(); + CROW_LOG_INFO << "Exiting."; + }) + .join(); + } + + void stop() + { + shutting_down_ = true; // Prevent the acceptor from taking new connections + for (auto& io_service : io_service_pool_) + { + if (io_service != nullptr) + { + CROW_LOG_INFO << "Closing IO service " << &io_service; + io_service->stop(); // Close all io_services (and HTTP connections) + } + } + + CROW_LOG_INFO << "Closing main IO service (" << &io_service_ << ')'; + io_service_.stop(); // Close main io_service + } + + /// Wait until the server has properly started + void wait_for_start() + { + std::unique_lock lock(start_mutex_); + if (!server_started_) + cv_started_.wait(lock); + } + + void signal_clear() + { + signals_.clear(); + } + + void signal_add(int signal_number) + { + signals_.add(signal_number); + } + + private: + uint16_t pick_io_service_idx() + { + uint16_t min_queue_idx = 0; + + // TODO improve load balancing + // size_t is used here to avoid the security issue https://codeql.github.com/codeql-query-help/cpp/cpp-comparison-with-wider-type/ + // even though the max value of this can be only uint16_t as concurrency is uint16_t. + for (size_t i = 1; i < task_queue_length_pool_.size() && task_queue_length_pool_[min_queue_idx] > 0; i++) + // No need to check other io_services if the current one has no tasks + { + if (task_queue_length_pool_[i] < task_queue_length_pool_[min_queue_idx]) + min_queue_idx = i; + } + return min_queue_idx; + } + + void do_accept() + { + if (!shutting_down_) + { + uint16_t service_idx = pick_io_service_idx(); + asio::io_service& is = *io_service_pool_[service_idx]; + task_queue_length_pool_[service_idx]++; + CROW_LOG_DEBUG << &is << " {" << service_idx << "} queue length: " << task_queue_length_pool_[service_idx]; + + auto p = std::make_shared>( + is, handler_, server_name_, middlewares_, + get_cached_date_str_pool_[service_idx], *task_timer_pool_[service_idx], adaptor_ctx_, task_queue_length_pool_[service_idx]); + + acceptor_.async_accept( + p->socket(), + [this, p, &is, service_idx](asio::error_code ec) { + if (!ec) + { + is.post( + [p] { + p->start(); + }); + } + else + { + task_queue_length_pool_[service_idx]--; + CROW_LOG_DEBUG << &is << " {" << service_idx << "} queue length: " << task_queue_length_pool_[service_idx]; + } + do_accept(); + }); + } + } + + /// Notify anything using `wait_for_start()` to proceed + void notify_start() + { + std::unique_lock lock(start_mutex_); + server_started_ = true; + cv_started_.notify_all(); + } + + private: + std::vector> io_service_pool_; + asio::io_service io_service_; + std::vector task_timer_pool_; + std::vector> get_cached_date_str_pool_; + tcp::acceptor acceptor_; + bool shutting_down_ = false; + bool server_started_{false}; + std::condition_variable cv_started_; + std::mutex start_mutex_; + asio::signal_set signals_; + + asio::basic_waitable_timer tick_timer_; + + Handler* handler_; + uint16_t concurrency_{2}; + std::uint8_t timeout_; + std::string server_name_; + uint16_t port_; + std::string bindaddr_; + std::vector> task_queue_length_pool_; + + std::chrono::milliseconds tick_interval_; + std::function tick_function_; + + std::tuple* middlewares_; + + typename Adaptor::context* adaptor_ctx_; + }; +} // namespace crow diff --git a/src/lib/crow/json.h b/src/lib/crow/json.h new file mode 100644 index 0000000..d0a2138 --- /dev/null +++ b/src/lib/crow/json.h @@ -0,0 +1,2003 @@ +#pragma once + +//#define CROW_JSON_NO_ERROR_CHECK +//#define CROW_JSON_USE_MAP + +#include +#ifdef CROW_JSON_USE_MAP +#include +#else +#include +#endif +#include +#include +#include +#include +#include + +#include "crow/utility.h" +#include "crow/settings.h" +#include "crow/returnable.h" +#include "crow/logging.h" + +using std::isinf; +using std::isnan; + + +namespace crow +{ + namespace mustache + { + class template_t; + } + + namespace json + { + inline void escape(const std::string& str, std::string& ret) + { + ret.reserve(ret.size() + str.size() + str.size() / 4); + for (auto c : str) + { + switch (c) + { + case '"': ret += "\\\""; break; + case '\\': ret += "\\\\"; break; + case '\n': ret += "\\n"; break; + case '\b': ret += "\\b"; break; + case '\f': ret += "\\f"; break; + case '\r': ret += "\\r"; break; + case '\t': ret += "\\t"; break; + default: + if (c >= 0 && c < 0x20) + { + ret += "\\u00"; + auto to_hex = [](char c) { + c = c & 0xf; + if (c < 10) + return '0' + c; + return 'a' + c - 10; + }; + ret += to_hex(c / 16); + ret += to_hex(c % 16); + } + else + ret += c; + break; + } + } + } + inline std::string escape(const std::string& str) + { + std::string ret; + escape(str, ret); + return ret; + } + + enum class type : char + { + Null, + False, + True, + Number, + String, + List, + Object, + Function + }; + + inline const char* get_type_str(type t) + { + switch (t) + { + case type::Number: return "Number"; + case type::False: return "False"; + case type::True: return "True"; + case type::List: return "List"; + case type::String: return "String"; + case type::Object: return "Object"; + case type::Function: return "Function"; + default: return "Unknown"; + } + } + + enum class num_type : char + { + Signed_integer, + Unsigned_integer, + Floating_point, + Null + }; + + class rvalue; + rvalue load(const char* data, size_t size); + + namespace detail + { + /// A read string implementation with comparison functionality. + struct r_string + { + r_string(){}; + r_string(char* s, char* e): + s_(s), e_(e){}; + ~r_string() + { + if (owned_) + delete[] s_; + } + + r_string(const r_string& r) + { + *this = r; + } + + r_string(r_string&& r) + { + *this = r; + } + + r_string& operator=(r_string&& r) + { + s_ = r.s_; + e_ = r.e_; + owned_ = r.owned_; + if (r.owned_) + r.owned_ = 0; + return *this; + } + + r_string& operator=(const r_string& r) + { + s_ = r.s_; + e_ = r.e_; + owned_ = 0; + return *this; + } + + operator std::string() const + { + return std::string(s_, e_); + } + + + const char* begin() const { return s_; } + const char* end() const { return e_; } + size_t size() const { return end() - begin(); } + + using iterator = const char*; + using const_iterator = const char*; + + char* s_; ///< Start. + mutable char* e_; ///< End. + uint8_t owned_{0}; + friend std::ostream& operator<<(std::ostream& os, const r_string& s) + { + os << static_cast(s); + return os; + } + + private: + void force(char* s, uint32_t length) + { + s_ = s; + e_ = s_ + length; + owned_ = 1; + } + friend rvalue crow::json::load(const char* data, size_t size); + + friend bool operator==(const r_string& l, const r_string& r); + friend bool operator==(const std::string& l, const r_string& r); + friend bool operator==(const r_string& l, const std::string& r); + + template + inline static bool equals(const T& l, const U& r) + { + if (l.size() != r.size()) + return false; + + for (size_t i = 0; i < l.size(); i++) + { + if (*(l.begin() + i) != *(r.begin() + i)) + return false; + } + + return true; + } + }; + + inline bool operator<(const r_string& l, const r_string& r) + { + return std::lexicographical_compare(l.begin(), l.end(), r.begin(), r.end()); + } + + inline bool operator<(const r_string& l, const std::string& r) + { + return std::lexicographical_compare(l.begin(), l.end(), r.begin(), r.end()); + } + + inline bool operator<(const std::string& l, const r_string& r) + { + return std::lexicographical_compare(l.begin(), l.end(), r.begin(), r.end()); + } + + inline bool operator>(const r_string& l, const r_string& r) + { + return std::lexicographical_compare(l.begin(), l.end(), r.begin(), r.end()); + } + + inline bool operator>(const r_string& l, const std::string& r) + { + return std::lexicographical_compare(l.begin(), l.end(), r.begin(), r.end()); + } + + inline bool operator>(const std::string& l, const r_string& r) + { + return std::lexicographical_compare(l.begin(), l.end(), r.begin(), r.end()); + } + + inline bool operator==(const r_string& l, const r_string& r) + { + return r_string::equals(l, r); + } + + inline bool operator==(const r_string& l, const std::string& r) + { + return r_string::equals(l, r); + } + + inline bool operator==(const std::string& l, const r_string& r) + { + return r_string::equals(l, r); + } + + inline bool operator!=(const r_string& l, const r_string& r) + { + return !(l == r); + } + + inline bool operator!=(const r_string& l, const std::string& r) + { + return !(l == r); + } + + inline bool operator!=(const std::string& l, const r_string& r) + { + return !(l == r); + } + } // namespace detail + + /// JSON read value. + + /// + /// Value can mean any json value, including a JSON object. + /// Read means this class is used to primarily read strings into a JSON value. + class rvalue + { + static const int cached_bit = 2; + static const int error_bit = 4; + + public: + rvalue() noexcept: + option_{error_bit} + { + } + rvalue(type t) noexcept: + lsize_{}, lremain_{}, t_{t} + { + } + rvalue(type t, char* s, char* e) noexcept: + start_{s}, end_{e}, t_{t} + { + determine_num_type(); + } + + rvalue(const rvalue& r): + start_(r.start_), end_(r.end_), key_(r.key_), t_(r.t_), nt_(r.nt_), option_(r.option_) + { + copy_l(r); + } + + rvalue(rvalue&& r) noexcept + { + *this = std::move(r); + } + + rvalue& operator=(const rvalue& r) + { + start_ = r.start_; + end_ = r.end_; + key_ = r.key_; + t_ = r.t_; + nt_ = r.nt_; + option_ = r.option_; + copy_l(r); + return *this; + } + rvalue& operator=(rvalue&& r) noexcept + { + start_ = r.start_; + end_ = r.end_; + key_ = std::move(r.key_); + l_ = std::move(r.l_); + lsize_ = r.lsize_; + lremain_ = r.lremain_; + t_ = r.t_; + nt_ = r.nt_; + option_ = r.option_; + return *this; + } + + explicit operator bool() const noexcept + { + return (option_ & error_bit) == 0; + } + + explicit operator int64_t() const + { + return i(); + } + + explicit operator uint64_t() const + { + return u(); + } + + explicit operator int() const + { + return static_cast(i()); + } + + /// Return any json value (not object or list) as a string. + explicit operator std::string() const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (t() == type::Object || t() == type::List) + throw std::runtime_error("json type container"); +#endif + switch (t()) + { + case type::String: + return std::string(s()); + case type::Null: + return std::string("null"); + case type::True: + return std::string("true"); + case type::False: + return std::string("false"); + default: + return std::string(start_, end_ - start_); + } + } + + /// The type of the JSON value. + type t() const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (option_ & error_bit) + { + throw std::runtime_error("invalid json object"); + } +#endif + return t_; + } + + /// The number type of the JSON value. + num_type nt() const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (option_ & error_bit) + { + throw std::runtime_error("invalid json object"); + } +#endif + return nt_; + } + + /// The integer value. + int64_t i() const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + switch (t()) + { + case type::Number: + case type::String: + return utility::lexical_cast(start_, end_ - start_); + default: + const std::string msg = "expected number, got: " + std::string(get_type_str(t())); + throw std::runtime_error(msg); + } +#endif + return utility::lexical_cast(start_, end_ - start_); + } + + /// The unsigned integer value. + uint64_t u() const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + switch (t()) + { + case type::Number: + case type::String: + return utility::lexical_cast(start_, end_ - start_); + default: + throw std::runtime_error(std::string("expected number, got: ") + get_type_str(t())); + } +#endif + return utility::lexical_cast(start_, end_ - start_); + } + + /// The double precision floating-point number value. + double d() const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (t() != type::Number) + throw std::runtime_error("value is not number"); +#endif + return utility::lexical_cast(start_, end_ - start_); + } + + /// The boolean value. + bool b() const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (t() != type::True && t() != type::False) + throw std::runtime_error("value is not boolean"); +#endif + return t() == type::True; + } + + /// The string value. + detail::r_string s() const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (t() != type::String) + throw std::runtime_error("value is not string"); +#endif + unescape(); + return detail::r_string{start_, end_}; + } + + /// The list or object value + std::vector lo() + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (t() != type::Object && t() != type::List) + throw std::runtime_error("value is not a container"); +#endif + std::vector ret; + ret.reserve(lsize_); + for (uint32_t i = 0; i < lsize_; i++) + { + ret.emplace_back(l_[i]); + } + return ret; + } + + /// Convert escaped string character to their original form ("\\n" -> '\n'). + void unescape() const + { + if (*(start_ - 1)) + { + char* head = start_; + char* tail = start_; + while (head != end_) + { + if (*head == '\\') + { + switch (*++head) + { + case '"': *tail++ = '"'; break; + case '\\': *tail++ = '\\'; break; + case '/': *tail++ = '/'; break; + case 'b': *tail++ = '\b'; break; + case 'f': *tail++ = '\f'; break; + case 'n': *tail++ = '\n'; break; + case 'r': *tail++ = '\r'; break; + case 't': *tail++ = '\t'; break; + case 'u': + { + auto from_hex = [](char c) { + if (c >= 'a') + return c - 'a' + 10; + if (c >= 'A') + return c - 'A' + 10; + return c - '0'; + }; + unsigned int code = + (from_hex(head[1]) << 12) + + (from_hex(head[2]) << 8) + + (from_hex(head[3]) << 4) + + from_hex(head[4]); + if (code >= 0x800) + { + *tail++ = 0xE0 | (code >> 12); + *tail++ = 0x80 | ((code >> 6) & 0x3F); + *tail++ = 0x80 | (code & 0x3F); + } + else if (code >= 0x80) + { + *tail++ = 0xC0 | (code >> 6); + *tail++ = 0x80 | (code & 0x3F); + } + else + { + *tail++ = code; + } + head += 4; + } + break; + } + } + else + *tail++ = *head; + head++; + } + end_ = tail; + *end_ = 0; + *(start_ - 1) = 0; + } + } + + /// Check if the json object has the passed string as a key. + bool has(const char* str) const + { + return has(std::string(str)); + } + + bool has(const std::string& str) const + { + struct Pred + { + bool operator()(const rvalue& l, const rvalue& r) const + { + return l.key_ < r.key_; + }; + bool operator()(const rvalue& l, const std::string& r) const + { + return l.key_ < r; + }; + bool operator()(const std::string& l, const rvalue& r) const + { + return l < r.key_; + }; + }; + if (!is_cached()) + { + std::sort(begin(), end(), Pred()); + set_cached(); + } + auto it = lower_bound(begin(), end(), str, Pred()); + return it != end() && it->key_ == str; + } + + int count(const std::string& str) + { + return has(str) ? 1 : 0; + } + + rvalue* begin() const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (t() != type::Object && t() != type::List) + throw std::runtime_error("value is not a container"); +#endif + return l_.get(); + } + rvalue* end() const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (t() != type::Object && t() != type::List) + throw std::runtime_error("value is not a container"); +#endif + return l_.get() + lsize_; + } + + const detail::r_string& key() const + { + return key_; + } + + size_t size() const + { + if (t() == type::String) + return s().size(); +#ifndef CROW_JSON_NO_ERROR_CHECK + if (t() != type::Object && t() != type::List) + throw std::runtime_error("value is not a container"); +#endif + return lsize_; + } + + const rvalue& operator[](int index) const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (t() != type::List) + throw std::runtime_error("value is not a list"); + if (index >= static_cast(lsize_) || index < 0) + throw std::runtime_error("list out of bound"); +#endif + return l_[index]; + } + + const rvalue& operator[](size_t index) const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (t() != type::List) + throw std::runtime_error("value is not a list"); + if (index >= lsize_) + throw std::runtime_error("list out of bound"); +#endif + return l_[index]; + } + + const rvalue& operator[](const char* str) const + { + return this->operator[](std::string(str)); + } + + const rvalue& operator[](const std::string& str) const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (t() != type::Object) + throw std::runtime_error("value is not an object"); +#endif + struct Pred + { + bool operator()(const rvalue& l, const rvalue& r) const + { + return l.key_ < r.key_; + }; + bool operator()(const rvalue& l, const std::string& r) const + { + return l.key_ < r; + }; + bool operator()(const std::string& l, const rvalue& r) const + { + return l < r.key_; + }; + }; + if (!is_cached()) + { + std::sort(begin(), end(), Pred()); + set_cached(); + } + auto it = lower_bound(begin(), end(), str, Pred()); + if (it != end() && it->key_ == str) + return *it; +#ifndef CROW_JSON_NO_ERROR_CHECK + throw std::runtime_error("cannot find key"); +#else + static rvalue nullValue; + return nullValue; +#endif + } + + void set_error() + { + option_ |= error_bit; + } + + bool error() const + { + return (option_ & error_bit) != 0; + } + + std::vector keys() const + { +#ifndef CROW_JSON_NO_ERROR_CHECK + if (t() != type::Object) + throw std::runtime_error("value is not an object"); +#endif + std::vector ret; + ret.reserve(lsize_); + for (uint32_t i = 0; i < lsize_; i++) + { + ret.emplace_back(std::string(l_[i].key())); + } + return ret; + } + + private: + bool is_cached() const + { + return (option_ & cached_bit) != 0; + } + void set_cached() const + { + option_ |= cached_bit; + } + void copy_l(const rvalue& r) + { + if (r.t() != type::Object && r.t() != type::List) + return; + lsize_ = r.lsize_; + lremain_ = 0; + l_.reset(new rvalue[lsize_]); + std::copy(r.begin(), r.end(), begin()); + } + + void emplace_back(rvalue&& v) + { + if (!lremain_) + { + int new_size = lsize_ + lsize_; + if (new_size - lsize_ > 60000) + new_size = lsize_ + 60000; + if (new_size < 4) + new_size = 4; + rvalue* p = new rvalue[new_size]; + rvalue* p2 = p; + for (auto& x : *this) + *p2++ = std::move(x); + l_.reset(p); + lremain_ = new_size - lsize_; + } + l_[lsize_++] = std::move(v); + lremain_--; + } + + /// Determines num_type from the string. + void determine_num_type() + { + if (t_ != type::Number) + { + nt_ = num_type::Null; + return; + } + + const std::size_t len = end_ - start_; + const bool has_minus = std::memchr(start_, '-', len) != nullptr; + const bool has_e = std::memchr(start_, 'e', len) != nullptr || std::memchr(start_, 'E', len) != nullptr; + const bool has_dec_sep = std::memchr(start_, '.', len) != nullptr; + if (has_dec_sep || has_e) + nt_ = num_type::Floating_point; + else if (has_minus) + nt_ = num_type::Signed_integer; + else + nt_ = num_type::Unsigned_integer; + } + + mutable char* start_; + mutable char* end_; + detail::r_string key_; + std::unique_ptr l_; + uint32_t lsize_; + uint16_t lremain_; + type t_; + num_type nt_{num_type::Null}; + mutable uint8_t option_{0}; + + friend rvalue load_nocopy_internal(char* data, size_t size); + friend rvalue load(const char* data, size_t size); + friend std::ostream& operator<<(std::ostream& os, const rvalue& r) + { + switch (r.t_) + { + + case type::Null: os << "null"; break; + case type::False: os << "false"; break; + case type::True: os << "true"; break; + case type::Number: + { + switch (r.nt()) + { + case num_type::Floating_point: os << r.d(); break; + case num_type::Signed_integer: os << r.i(); break; + case num_type::Unsigned_integer: os << r.u(); break; + case num_type::Null: throw std::runtime_error("Number with num_type Null"); + } + } + break; + case type::String: os << '"' << r.s() << '"'; break; + case type::List: + { + os << '['; + bool first = true; + for (auto& x : r) + { + if (!first) + os << ','; + first = false; + os << x; + } + os << ']'; + } + break; + case type::Object: + { + os << '{'; + bool first = true; + for (auto& x : r) + { + if (!first) + os << ','; + os << '"' << escape(x.key_) << "\":"; + first = false; + os << x; + } + os << '}'; + } + break; + case type::Function: os << "custom function"; break; + } + return os; + } + }; + namespace detail + { + } + + inline bool operator==(const rvalue& l, const std::string& r) + { + return l.s() == r; + } + + inline bool operator==(const std::string& l, const rvalue& r) + { + return l == r.s(); + } + + inline bool operator!=(const rvalue& l, const std::string& r) + { + return l.s() != r; + } + + inline bool operator!=(const std::string& l, const rvalue& r) + { + return l != r.s(); + } + + inline bool operator==(const rvalue& l, double r) + { + return l.d() == r; + } + + inline bool operator==(double l, const rvalue& r) + { + return l == r.d(); + } + + inline bool operator!=(const rvalue& l, double r) + { + return l.d() != r; + } + + inline bool operator!=(double l, const rvalue& r) + { + return l != r.d(); + } + + + inline rvalue load_nocopy_internal(char* data, size_t size) + { + // Defend against excessive recursion + static constexpr unsigned max_depth = 10000; + + //static const char* escaped = "\"\\/\b\f\n\r\t"; + struct Parser + { + Parser(char* data, size_t /*size*/): + data(data) + { + } + + bool consume(char c) + { + if (CROW_UNLIKELY(*data != c)) + return false; + data++; + return true; + } + + void ws_skip() + { + while (*data == ' ' || *data == '\t' || *data == '\r' || *data == '\n') + ++data; + }; + + rvalue decode_string() + { + if (CROW_UNLIKELY(!consume('"'))) + return {}; + char* start = data; + uint8_t has_escaping = 0; + while (1) + { + if (CROW_LIKELY(*data != '"' && *data != '\\' && *data != '\0')) + { + data++; + } + else if (*data == '"') + { + *data = 0; + *(start - 1) = has_escaping; + data++; + return {type::String, start, data - 1}; + } + else if (*data == '\\') + { + has_escaping = 1; + data++; + switch (*data) + { + case 'u': + { + auto check = [](char c) { + return ('0' <= c && c <= '9') || + ('a' <= c && c <= 'f') || + ('A' <= c && c <= 'F'); + }; + if (!(check(*(data + 1)) && + check(*(data + 2)) && + check(*(data + 3)) && + check(*(data + 4)))) + return {}; + } + data += 5; + break; + case '"': + case '\\': + case '/': + case 'b': + case 'f': + case 'n': + case 'r': + case 't': + data++; + break; + default: + return {}; + } + } + else + return {}; + } + return {}; + } + + rvalue decode_list(unsigned depth) + { + rvalue ret(type::List); + if (CROW_UNLIKELY(!consume('[')) || CROW_UNLIKELY(depth > max_depth)) + { + ret.set_error(); + return ret; + } + ws_skip(); + if (CROW_UNLIKELY(*data == ']')) + { + data++; + return ret; + } + + while (1) + { + auto v = decode_value(depth + 1); + if (CROW_UNLIKELY(!v)) + { + ret.set_error(); + break; + } + ws_skip(); + ret.emplace_back(std::move(v)); + if (*data == ']') + { + data++; + break; + } + if (CROW_UNLIKELY(!consume(','))) + { + ret.set_error(); + break; + } + ws_skip(); + } + return ret; + } + + rvalue decode_number() + { + char* start = data; + + enum NumberParsingState + { + Minus, + AfterMinus, + ZeroFirst, + Digits, + DigitsAfterPoints, + E, + DigitsAfterE, + Invalid, + } state{Minus}; + while (CROW_LIKELY(state != Invalid)) + { + switch (*data) + { + case '0': + state = static_cast("\2\2\7\3\4\6\6"[state]); + /*if (state == NumberParsingState::Minus || state == NumberParsingState::AfterMinus) + { + state = NumberParsingState::ZeroFirst; + } + else if (state == NumberParsingState::Digits || + state == NumberParsingState::DigitsAfterE || + state == NumberParsingState::DigitsAfterPoints) + { + // ok; pass + } + else if (state == NumberParsingState::E) + { + state = NumberParsingState::DigitsAfterE; + } + else + return {};*/ + break; + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + state = static_cast("\3\3\7\3\4\6\6"[state]); + while (*(data + 1) >= '0' && *(data + 1) <= '9') + data++; + /*if (state == NumberParsingState::Minus || state == NumberParsingState::AfterMinus) + { + state = NumberParsingState::Digits; + } + else if (state == NumberParsingState::Digits || + state == NumberParsingState::DigitsAfterE || + state == NumberParsingState::DigitsAfterPoints) + { + // ok; pass + } + else if (state == NumberParsingState::E) + { + state = NumberParsingState::DigitsAfterE; + } + else + return {};*/ + break; + case '.': + state = static_cast("\7\7\4\4\7\7\7"[state]); + /* + if (state == NumberParsingState::Digits || state == NumberParsingState::ZeroFirst) + { + state = NumberParsingState::DigitsAfterPoints; + } + else + return {}; + */ + break; + case '-': + state = static_cast("\1\7\7\7\7\6\7"[state]); + /*if (state == NumberParsingState::Minus) + { + state = NumberParsingState::AfterMinus; + } + else if (state == NumberParsingState::E) + { + state = NumberParsingState::DigitsAfterE; + } + else + return {};*/ + break; + case '+': + state = static_cast("\7\7\7\7\7\6\7"[state]); + /*if (state == NumberParsingState::E) + { + state = NumberParsingState::DigitsAfterE; + } + else + return {};*/ + break; + case 'e': + case 'E': + state = static_cast("\7\7\7\5\5\7\7"[state]); + /*if (state == NumberParsingState::Digits || + state == NumberParsingState::DigitsAfterPoints) + { + state = NumberParsingState::E; + } + else + return {};*/ + break; + default: + if (CROW_LIKELY(state == NumberParsingState::ZeroFirst || + state == NumberParsingState::Digits || + state == NumberParsingState::DigitsAfterPoints || + state == NumberParsingState::DigitsAfterE)) + return {type::Number, start, data}; + else + return {}; + } + data++; + } + + return {}; + } + + + rvalue decode_value(unsigned depth) + { + switch (*data) + { + case '[': + return decode_list(depth + 1); + case '{': + return decode_object(depth + 1); + case '"': + return decode_string(); + case 't': + if ( //e-data >= 4 && + data[1] == 'r' && + data[2] == 'u' && + data[3] == 'e') + { + data += 4; + return {type::True}; + } + else + return {}; + case 'f': + if ( //e-data >= 5 && + data[1] == 'a' && + data[2] == 'l' && + data[3] == 's' && + data[4] == 'e') + { + data += 5; + return {type::False}; + } + else + return {}; + case 'n': + if ( //e-data >= 4 && + data[1] == 'u' && + data[2] == 'l' && + data[3] == 'l') + { + data += 4; + return {type::Null}; + } + else + return {}; + //case '1': case '2': case '3': + //case '4': case '5': case '6': + //case '7': case '8': case '9': + //case '0': case '-': + default: + return decode_number(); + } + return {}; + } + + rvalue decode_object(unsigned depth) + { + rvalue ret(type::Object); + if (CROW_UNLIKELY(!consume('{')) || CROW_UNLIKELY(depth > max_depth)) + { + ret.set_error(); + return ret; + } + + ws_skip(); + + if (CROW_UNLIKELY(*data == '}')) + { + data++; + return ret; + } + + while (1) + { + auto t = decode_string(); + if (CROW_UNLIKELY(!t)) + { + ret.set_error(); + break; + } + + ws_skip(); + if (CROW_UNLIKELY(!consume(':'))) + { + ret.set_error(); + break; + } + + // TODO(ipkn) caching key to speed up (flyweight?) + // I have no idea how flyweight could apply here, but maybe some speedup can happen if we stopped checking type since decode_string returns a string anyway + auto key = t.s(); + + ws_skip(); + auto v = decode_value(depth + 1); + if (CROW_UNLIKELY(!v)) + { + ret.set_error(); + break; + } + ws_skip(); + + v.key_ = std::move(key); + ret.emplace_back(std::move(v)); + if (CROW_UNLIKELY(*data == '}')) + { + data++; + break; + } + if (CROW_UNLIKELY(!consume(','))) + { + ret.set_error(); + break; + } + ws_skip(); + } + return ret; + } + + rvalue parse() + { + ws_skip(); + auto ret = decode_value(0); // or decode object? + ws_skip(); + if (ret && *data != '\0') + ret.set_error(); + return ret; + } + + char* data; + }; + return Parser(data, size).parse(); + } + inline rvalue load(const char* data, size_t size) + { + char* s = new char[size + 1]; + memcpy(s, data, size); + s[size] = 0; + auto ret = load_nocopy_internal(s, size); + if (ret) + ret.key_.force(s, size); + else + delete[] s; + return ret; + } + + inline rvalue load(const char* data) + { + return load(data, strlen(data)); + } + + inline rvalue load(const std::string& str) + { + return load(str.data(), str.size()); + } + + struct wvalue_reader; + + /// JSON write value. + + /// + /// Value can mean any json value, including a JSON object.
+ /// Write means this class is used to primarily assemble JSON objects using keys and values and export those into a string. + class wvalue : public returnable + { + friend class crow::mustache::template_t; + friend struct wvalue_reader; + + public: + using object = +#ifdef CROW_JSON_USE_MAP + std::map; +#else + std::unordered_map; +#endif + + using list = std::vector; + + type t() const { return t_; } + + /// Create an empty json value (outputs "{}" instead of a "null" string) + static crow::json::wvalue empty_object() { return crow::json::wvalue::object(); } + + private: + type t_{type::Null}; ///< The type of the value. + num_type nt{num_type::Null}; ///< The specific type of the number if \ref t_ is a number. + union number + { + double d; + int64_t si; + uint64_t ui; + + public: + constexpr number() noexcept: + ui() {} /* default constructor initializes unsigned integer. */ + constexpr number(std::uint64_t value) noexcept: + ui(value) {} + constexpr number(std::int64_t value) noexcept: + si(value) {} + constexpr number(double value) noexcept: + d(value) {} + } num; ///< Value if type is a number. + std::string s; ///< Value if type is a string. + std::unique_ptr l; ///< Value if type is a list. + std::unique_ptr o; ///< Value if type is a JSON object. + std::function f; ///< Value if type is a function (C++ lambda) + + public: + wvalue(): + returnable("application/json") {} + + wvalue(std::nullptr_t): + returnable("application/json"), t_(type::Null) {} + + wvalue(bool value): + returnable("application/json"), t_(value ? type::True : type::False) {} + + wvalue(std::uint8_t value): + returnable("application/json"), t_(type::Number), nt(num_type::Unsigned_integer), num(static_cast(value)) {} + wvalue(std::uint16_t value): + returnable("application/json"), t_(type::Number), nt(num_type::Unsigned_integer), num(static_cast(value)) {} + wvalue(std::uint32_t value): + returnable("application/json"), t_(type::Number), nt(num_type::Unsigned_integer), num(static_cast(value)) {} + wvalue(std::uint64_t value): + returnable("application/json"), t_(type::Number), nt(num_type::Unsigned_integer), num(static_cast(value)) {} + + wvalue(std::int8_t value): + returnable("application/json"), t_(type::Number), nt(num_type::Signed_integer), num(static_cast(value)) {} + wvalue(std::int16_t value): + returnable("application/json"), t_(type::Number), nt(num_type::Signed_integer), num(static_cast(value)) {} + wvalue(std::int32_t value): + returnable("application/json"), t_(type::Number), nt(num_type::Signed_integer), num(static_cast(value)) {} + wvalue(std::int64_t value): + returnable("application/json"), t_(type::Number), nt(num_type::Signed_integer), num(static_cast(value)) {} + + wvalue(float value): + returnable("application/json"), t_(type::Number), nt(num_type::Floating_point), num(static_cast(value)) {} + wvalue(double value): + returnable("application/json"), t_(type::Number), nt(num_type::Floating_point), num(static_cast(value)) {} + + wvalue(char const* value): + returnable("application/json"), t_(type::String), s(value) {} + + wvalue(std::string const& value): + returnable("application/json"), t_(type::String), s(value) {} + wvalue(std::string&& value): + returnable("application/json"), t_(type::String), s(std::move(value)) {} + + wvalue(std::initializer_list> initializer_list): + returnable("application/json"), t_(type::Object), o(new object(initializer_list)) {} + + wvalue(object const& value): + returnable("application/json"), t_(type::Object), o(new object(value)) {} + wvalue(object&& value): + returnable("application/json"), t_(type::Object), o(new object(std::move(value))) {} + + wvalue(const list& r): + returnable("application/json") + { + t_ = type::List; + l = std::unique_ptr(new list{}); + l->reserve(r.size()); + for (auto it = r.begin(); it != r.end(); ++it) + l->emplace_back(*it); + } + wvalue(list& r): + returnable("application/json") + { + t_ = type::List; + l = std::unique_ptr(new list{}); + l->reserve(r.size()); + for (auto it = r.begin(); it != r.end(); ++it) + l->emplace_back(*it); + } + + /// Create a write value from a read value (useful for editing JSON strings). + wvalue(const rvalue& r): + returnable("application/json") + { + t_ = r.t(); + switch (r.t()) + { + case type::Null: + case type::False: + case type::True: + case type::Function: + return; + case type::Number: + nt = r.nt(); + if (nt == num_type::Floating_point) + num.d = r.d(); + else if (nt == num_type::Signed_integer) + num.si = r.i(); + else + num.ui = r.u(); + return; + case type::String: + s = r.s(); + return; + case type::List: + l = std::unique_ptr(new list{}); + l->reserve(r.size()); + for (auto it = r.begin(); it != r.end(); ++it) + l->emplace_back(*it); + return; + case type::Object: + o = std::unique_ptr(new object{}); + for (auto it = r.begin(); it != r.end(); ++it) + o->emplace(it->key(), *it); + return; + } + } + + wvalue(const wvalue& r): + returnable("application/json") + { + t_ = r.t(); + switch (r.t()) + { + case type::Null: + case type::False: + case type::True: + return; + case type::Number: + nt = r.nt; + if (nt == num_type::Floating_point) + num.d = r.num.d; + else if (nt == num_type::Signed_integer) + num.si = r.num.si; + else + num.ui = r.num.ui; + return; + case type::String: + s = r.s; + return; + case type::List: + l = std::unique_ptr(new list{}); + l->reserve(r.size()); + for (auto it = r.l->begin(); it != r.l->end(); ++it) + l->emplace_back(*it); + return; + case type::Object: + o = std::unique_ptr(new object{}); + o->insert(r.o->begin(), r.o->end()); + return; + case type::Function: + f = r.f; + } + } + + wvalue(wvalue&& r): + returnable("application/json") + { + *this = std::move(r); + } + + wvalue& operator=(wvalue&& r) + { + t_ = r.t_; + nt = r.nt; + num = r.num; + s = std::move(r.s); + l = std::move(r.l); + o = std::move(r.o); + return *this; + } + + /// Used for compatibility, same as \ref reset() + void clear() + { + reset(); + } + + void reset() + { + t_ = type::Null; + l.reset(); + o.reset(); + } + + wvalue& operator=(std::nullptr_t) + { + reset(); + return *this; + } + wvalue& operator=(bool value) + { + reset(); + if (value) + t_ = type::True; + else + t_ = type::False; + return *this; + } + + wvalue& operator=(double value) + { + reset(); + t_ = type::Number; + num.d = value; + nt = num_type::Floating_point; + return *this; + } + + wvalue& operator=(unsigned short value) + { + reset(); + t_ = type::Number; + num.ui = value; + nt = num_type::Unsigned_integer; + return *this; + } + + wvalue& operator=(short value) + { + reset(); + t_ = type::Number; + num.si = value; + nt = num_type::Signed_integer; + return *this; + } + + wvalue& operator=(long long value) + { + reset(); + t_ = type::Number; + num.si = value; + nt = num_type::Signed_integer; + return *this; + } + + wvalue& operator=(long value) + { + reset(); + t_ = type::Number; + num.si = value; + nt = num_type::Signed_integer; + return *this; + } + + wvalue& operator=(int value) + { + reset(); + t_ = type::Number; + num.si = value; + nt = num_type::Signed_integer; + return *this; + } + + wvalue& operator=(unsigned long long value) + { + reset(); + t_ = type::Number; + num.ui = value; + nt = num_type::Unsigned_integer; + return *this; + } + + wvalue& operator=(unsigned long value) + { + reset(); + t_ = type::Number; + num.ui = value; + nt = num_type::Unsigned_integer; + return *this; + } + + wvalue& operator=(unsigned int value) + { + reset(); + t_ = type::Number; + num.ui = value; + nt = num_type::Unsigned_integer; + return *this; + } + + wvalue& operator=(const char* str) + { + reset(); + t_ = type::String; + s = str; + return *this; + } + + wvalue& operator=(const std::string& str) + { + reset(); + t_ = type::String; + s = str; + return *this; + } + + wvalue& operator=(list&& v) + { + if (t_ != type::List) + reset(); + t_ = type::List; + if (!l) + l = std::unique_ptr(new list{}); + l->clear(); + l->resize(v.size()); + size_t idx = 0; + for (auto& x : v) + { + (*l)[idx++] = std::move(x); + } + return *this; + } + + template + wvalue& operator=(const std::vector& v) + { + if (t_ != type::List) + reset(); + t_ = type::List; + if (!l) + l = std::unique_ptr(new list{}); + l->clear(); + l->resize(v.size()); + size_t idx = 0; + for (auto& x : v) + { + (*l)[idx++] = x; + } + return *this; + } + + wvalue& operator=(std::initializer_list> initializer_list) + { + if (t_ != type::Object) + { + reset(); + t_ = type::Object; + o = std::unique_ptr(new object(initializer_list)); + } + else + { +#if defined(__APPLE__) || defined(__MACH__) || defined(__FreeBSD__) || defined(__ANDROID__) + o = std::unique_ptr(new object(initializer_list)); +#else + (*o) = initializer_list; +#endif + } + return *this; + } + + wvalue& operator=(object const& value) + { + if (t_ != type::Object) + { + reset(); + t_ = type::Object; + o = std::unique_ptr(new object(value)); + } + else + { +#if defined(__APPLE__) || defined(__MACH__) || defined(__FreeBSD__) || defined(__ANDROID__) + o = std::unique_ptr(new object(value)); +#else + (*o) = value; +#endif + } + return *this; + } + + wvalue& operator=(object&& value) + { + if (t_ != type::Object) + { + reset(); + t_ = type::Object; + o = std::unique_ptr(new object(std::move(value))); + } + else + { + (*o) = std::move(value); + } + return *this; + } + + wvalue& operator=(std::function&& func) + { + reset(); + t_ = type::Function; + f = std::move(func); + return *this; + } + + wvalue& operator[](unsigned index) + { + if (t_ != type::List) + reset(); + t_ = type::List; + if (!l) + l = std::unique_ptr(new list{}); + if (l->size() < index + 1) + l->resize(index + 1); + return (*l)[index]; + } + + const wvalue& operator[](unsigned index) const + { + return const_cast(this)->operator[](index); + } + + int count(const std::string& str) const + { + if (t_ != type::Object) + return 0; + if (!o) + return 0; + return o->count(str); + } + + wvalue& operator[](const std::string& str) + { + if (t_ != type::Object) + reset(); + t_ = type::Object; + if (!o) + o = std::unique_ptr(new object{}); + return (*o)[str]; + } + + const wvalue& operator[](const std::string& str) const + { + return const_cast(this)->operator[](str); + } + + std::vector keys() const + { + if (t_ != type::Object) + return {}; + std::vector result; + for (auto& kv : *o) + { + result.push_back(kv.first); + } + return result; + } + + std::string execute(std::string txt = "") const //Not using reference because it cannot be used with a default rvalue + { + if (t_ != type::Function) + return ""; + return f(txt); + } + + /// If the wvalue is a list, it returns the length of the list, otherwise it returns 1. + std::size_t size() const + { + if (t_ != type::List) + return 1; + return l->size(); + } + + /// Returns an estimated size of the value in bytes. + size_t estimate_length() const + { + switch (t_) + { + case type::Null: return 4; + case type::False: return 5; + case type::True: return 4; + case type::Number: return 30; + case type::String: return 2 + s.size() + s.size() / 2; + case type::List: + { + size_t sum{}; + if (l) + { + for (auto& x : *l) + { + sum += 1; + sum += x.estimate_length(); + } + } + return sum + 2; + } + case type::Object: + { + size_t sum{}; + if (o) + { + for (auto& kv : *o) + { + sum += 2; + sum += 2 + kv.first.size() + kv.first.size() / 2; + sum += kv.second.estimate_length(); + } + } + return sum + 2; + } + case type::Function: + return 0; + } + return 1; + } + + private: + inline void dump_string(const std::string& str, std::string& out) const + { + out.push_back('"'); + escape(str, out); + out.push_back('"'); + } + + inline void dump_internal(const wvalue& v, std::string& out) const + { + switch (v.t_) + { + case type::Null: out += "null"; break; + case type::False: out += "false"; break; + case type::True: out += "true"; break; + case type::Number: + { + if (v.nt == num_type::Floating_point) + { + if (isnan(v.num.d) || isinf(v.num.d)) + { + out += "null"; + CROW_LOG_WARNING << "Invalid JSON value detected (" << v.num.d << "), value set to null"; + break; + } + enum + { + start, + decp, // Decimal point + zero + } f_state; + char outbuf[128]; +#ifdef _MSC_VER + sprintf_s(outbuf, sizeof(outbuf), "%f", v.num.d); +#else + snprintf(outbuf, sizeof(outbuf), "%f", v.num.d); +#endif + char *p = &outbuf[0], *o = nullptr; // o is the position of the first trailing 0 + f_state = start; + while (*p != '\0') + { + //std::cout << *p << std::endl; + char ch = *p; + switch (f_state) + { + case start: // Loop and lookahead until a decimal point is found + if (ch == '.') + { + char fch = *(p + 1); + // if the first character is 0, leave it be (this is so that "1.00000" becomes "1.0" and not "1.") + if (fch != '\0' && fch == '0') p++; + f_state = decp; + } + p++; + break; + case decp: // Loop until a 0 is found, if found, record its position + if (ch == '0') + { + f_state = zero; + o = p; + } + p++; + break; + case zero: // if a non 0 is found (e.g. 1.00004) remove the earlier recorded 0 position and look for more trailing 0s + if (ch != '0') + { + o = nullptr; + f_state = decp; + } + p++; + break; + } + } + if (o != nullptr) // if any trailing 0s are found, terminate the string where they begin + *o = '\0'; + out += outbuf; + } + else if (v.nt == num_type::Signed_integer) + { + out += std::to_string(v.num.si); + } + else + { + out += std::to_string(v.num.ui); + } + } + break; + case type::String: dump_string(v.s, out); break; + case type::List: + { + out.push_back('['); + if (v.l) + { + bool first = true; + for (auto& x : *v.l) + { + if (!first) + { + out.push_back(','); + } + first = false; + dump_internal(x, out); + } + } + out.push_back(']'); + } + break; + case type::Object: + { + out.push_back('{'); + if (v.o) + { + bool first = true; + for (auto& kv : *v.o) + { + if (!first) + { + out.push_back(','); + } + first = false; + dump_string(kv.first, out); + out.push_back(':'); + dump_internal(kv.second, out); + } + } + out.push_back('}'); + } + break; + + case type::Function: + out += "custom function"; + break; + } + } + + public: + std::string dump() const + { + std::string ret; + ret.reserve(estimate_length()); + dump_internal(*this, ret); + return ret; + } + }; + + // Used for accessing the internals of a wvalue + struct wvalue_reader + { + int64_t get(int64_t fallback) + { + if (ref.t() != type::Number || ref.nt == num_type::Floating_point) + return fallback; + return ref.num.si; + } + + double get(double fallback) + { + if (ref.t() != type::Number || ref.nt != num_type::Floating_point) + return fallback; + return ref.num.d; + } + + bool get(bool fallback) + { + if (ref.t() == type::True) return true; + if (ref.t() == type::False) return false; + return fallback; + } + + std::string get(const std::string& fallback) + { + if (ref.t() != type::String) return fallback; + return ref.s; + } + + const wvalue& ref; + }; + + //std::vector dump_ref(wvalue& v) + //{ + //} + } // namespace json +} // namespace crow diff --git a/src/lib/crow/logging.h b/src/lib/crow/logging.h new file mode 100644 index 0000000..ebe2f42 --- /dev/null +++ b/src/lib/crow/logging.h @@ -0,0 +1,165 @@ +#pragma once + +#include "crow/settings.h" + +#include +#include +#include +#include +#include +#include + +namespace crow +{ + enum class LogLevel + { +#ifndef ERROR +#ifndef DEBUG + DEBUG = 0, + INFO, + WARNING, + ERROR, + CRITICAL, +#endif +#endif + + Debug = 0, + Info, + Warning, + Error, + Critical, + }; + + class ILogHandler + { + public: + virtual ~ILogHandler() = default; + + virtual void log(std::string message, LogLevel level) = 0; + }; + + class CerrLogHandler : public ILogHandler + { + public: + void log(std::string message, LogLevel level) override + { + std::string prefix; + switch (level) + { + case LogLevel::Debug: + prefix = "DEBUG "; + break; + case LogLevel::Info: + prefix = "INFO "; + break; + case LogLevel::Warning: + prefix = "WARNING "; + break; + case LogLevel::Error: + prefix = "ERROR "; + break; + case LogLevel::Critical: + prefix = "CRITICAL"; + break; + } + //std::cerr << std::string("(") + timestamp() + std::string(") [") + prefix + std::string("] ") + message << std::endl; + } + + private: + static std::string timestamp() + { + char date[32]; + time_t t = time(0); + + tm my_tm; + +#if defined(_MSC_VER) || defined(__MINGW32__) +#ifdef CROW_USE_LOCALTIMEZONE + localtime_s(&my_tm, &t); +#else + gmtime_s(&my_tm, &t); +#endif +#else +#ifdef CROW_USE_LOCALTIMEZONE + localtime_r(&t, &my_tm); +#else + gmtime_r(&t, &my_tm); +#endif +#endif + + size_t sz = strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", &my_tm); + return std::string(date, date + sz); + } + }; + + class logger + { + public: + logger(LogLevel level): + level_(level) + {} + ~logger() + { +#ifdef CROW_ENABLE_LOGGING + if (level_ >= get_current_log_level()) + { + get_handler_ref()->log(stringstream_.str(), level_); + } +#endif + } + + // + template + logger& operator<<(T const& value) + { +#ifdef CROW_ENABLE_LOGGING + if (level_ >= get_current_log_level()) + { + stringstream_ << value; + } +#endif + return *this; + } + + // + static void setLogLevel(LogLevel level) { get_log_level_ref() = level; } + + static void setHandler(ILogHandler* handler) { get_handler_ref() = handler; } + + static LogLevel get_current_log_level() { return get_log_level_ref(); } + + private: + // + static LogLevel& get_log_level_ref() + { + static LogLevel current_level = static_cast(CROW_LOG_LEVEL); + return current_level; + } + static ILogHandler*& get_handler_ref() + { + static CerrLogHandler default_handler; + static ILogHandler* current_handler = &default_handler; + return current_handler; + } + + // + std::ostringstream stringstream_; + LogLevel level_; + }; +} // namespace crow + +#define CROW_LOG_CRITICAL \ + if (crow::logger::get_current_log_level() <= crow::LogLevel::Critical) \ + crow::logger(crow::LogLevel::Critical) +#define CROW_LOG_ERROR \ + if (crow::logger::get_current_log_level() <= crow::LogLevel::Error) \ + crow::logger(crow::LogLevel::Error) +#define CROW_LOG_WARNING \ + if (crow::logger::get_current_log_level() <= crow::LogLevel::Warning) \ + crow::logger(crow::LogLevel::Warning) +#define CROW_LOG_INFO \ + if (crow::logger::get_current_log_level() <= crow::LogLevel::Info) \ + crow::logger(crow::LogLevel::Info) +#define CROW_LOG_DEBUG \ + if (crow::logger::get_current_log_level() <= crow::LogLevel::Debug) \ + crow::logger(crow::LogLevel::Debug) diff --git a/src/lib/crow/middleware.h b/src/lib/crow/middleware.h new file mode 100644 index 0000000..cdacf30 --- /dev/null +++ b/src/lib/crow/middleware.h @@ -0,0 +1,331 @@ +#pragma once + +#include "crow/http_request.h" +#include "crow/http_response.h" +#include "crow/utility.h" + +#include +#include +#include +#include + +namespace crow +{ + + /// Local middleware should extend ILocalMiddleware + struct ILocalMiddleware + { + using call_global = std::false_type; + }; + + namespace detail + { + template + struct check_before_handle_arity_3_const + { + template + struct get + {}; + }; + + template + struct check_before_handle_arity_3 + { + template + struct get + {}; + }; + + template + struct check_after_handle_arity_3_const + { + template + struct get + {}; + }; + + template + struct check_after_handle_arity_3 + { + template + struct get + {}; + }; + + template + struct check_global_call_false + { + template::type = true> + struct get + {}; + }; + + template + struct is_before_handle_arity_3_impl + { + template + static std::true_type f(typename check_before_handle_arity_3_const::template get*); + + template + static std::true_type f(typename check_before_handle_arity_3::template get*); + + template + static std::false_type f(...); + + public: + static const bool value = decltype(f(nullptr))::value; + }; + + template + struct is_after_handle_arity_3_impl + { + template + static std::true_type f(typename check_after_handle_arity_3_const::template get*); + + template + static std::true_type f(typename check_after_handle_arity_3::template get*); + + template + static std::false_type f(...); + + public: + static constexpr bool value = decltype(f(nullptr))::value; + }; + + template + struct is_middleware_global + { + template + static std::false_type f(typename check_global_call_false::template get*); + + template + static std::true_type f(...); + + static const bool value = decltype(f(nullptr))::value; + }; + + template + typename std::enable_if::value>::type + before_handler_call(MW& mw, request& req, response& res, Context& ctx, ParentContext& /*parent_ctx*/) + { + mw.before_handle(req, res, ctx.template get(), ctx); + } + + template + typename std::enable_if::value>::type + before_handler_call(MW& mw, request& req, response& res, Context& ctx, ParentContext& /*parent_ctx*/) + { + mw.before_handle(req, res, ctx.template get()); + } + + template + typename std::enable_if::value>::type + after_handler_call(MW& mw, request& req, response& res, Context& ctx, ParentContext& /*parent_ctx*/) + { + mw.after_handle(req, res, ctx.template get(), ctx); + } + + template + typename std::enable_if::value>::type + after_handler_call(MW& mw, request& req, response& res, Context& ctx, ParentContext& /*parent_ctx*/) + { + mw.after_handle(req, res, ctx.template get()); + } + + + template + typename std::enable_if<(N < std::tuple_size::type>::value), bool>::type + middleware_call_helper(const CallCriteria& cc, Container& middlewares, request& req, response& res, Context& ctx) + { + + using CurrentMW = typename std::tuple_element::type>::type; + + if (!cc.template enabled(N)) + { + return middleware_call_helper(cc, middlewares, req, res, ctx); + } + + using parent_context_t = typename Context::template partial; + before_handler_call(std::get(middlewares), req, res, ctx, static_cast(ctx)); + if (res.is_completed()) + { + after_handler_call(std::get(middlewares), req, res, ctx, static_cast(ctx)); + return true; + } + + if (middleware_call_helper(cc, middlewares, req, res, ctx)) + { + after_handler_call(std::get(middlewares), req, res, ctx, static_cast(ctx)); + return true; + } + + return false; + } + + template + typename std::enable_if<(N >= std::tuple_size::type>::value), bool>::type + middleware_call_helper(const CallCriteria& /*cc*/, Container& /*middlewares*/, request& /*req*/, response& /*res*/, Context& /*ctx*/) + { + return false; + } + + template + typename std::enable_if<(N < 0)>::type + after_handlers_call_helper(const CallCriteria& /*cc*/, Container& /*middlewares*/, Context& /*context*/, request& /*req*/, response& /*res*/) + { + } + + template + typename std::enable_if<(N == 0)>::type after_handlers_call_helper(const CallCriteria& cc, Container& middlewares, Context& ctx, request& req, response& res) + { + using parent_context_t = typename Context::template partial; + using CurrentMW = typename std::tuple_element::type>::type; + if (cc.template enabled(N)) + { + after_handler_call(std::get(middlewares), req, res, ctx, static_cast(ctx)); + } + } + + template + typename std::enable_if<(N > 0)>::type after_handlers_call_helper(const CallCriteria& cc, Container& middlewares, Context& ctx, request& req, response& res) + { + using parent_context_t = typename Context::template partial; + using CurrentMW = typename std::tuple_element::type>::type; + if (cc.template enabled(N)) + { + after_handler_call(std::get(middlewares), req, res, ctx, static_cast(ctx)); + } + after_handlers_call_helper(cc, middlewares, ctx, req, res); + } + + // A CallCriteria that accepts only global middleware + struct middleware_call_criteria_only_global + { + template + constexpr bool enabled(int) const + { + return is_middleware_global::value; + } + }; + + template + typename std::enable_if>::value, void>::type + wrapped_handler_call(crow::request& /*req*/, crow::response& res, const F& f, Args&&... args) + { + static_assert(!std::is_same()...))>::value, + "Handler function cannot have void return type; valid return types: string, int, crow::response, crow::returnable"); + + res = crow::response(f(std::forward(args)...)); + res.end(); + } + + template + typename std::enable_if< + !black_magic::CallHelper>::value && + black_magic::CallHelper>::value, + void>::type + wrapped_handler_call(crow::request& req, crow::response& res, const F& f, Args&&... args) + { + static_assert(!std::is_same(), std::declval()...))>::value, + "Handler function cannot have void return type; valid return types: string, int, crow::response, crow::returnable"); + + res = crow::response(f(req, std::forward(args)...)); + res.end(); + } + + template + typename std::enable_if< + !black_magic::CallHelper>::value && + !black_magic::CallHelper>::value && + black_magic::CallHelper>::value, + void>::type + wrapped_handler_call(crow::request& /*req*/, crow::response& res, const F& f, Args&&... args) + { + static_assert(std::is_same(), std::declval()...))>::value, + "Handler function with response argument should have void return type"); + + f(res, std::forward(args)...); + } + + template + typename std::enable_if< + !black_magic::CallHelper>::value && + !black_magic::CallHelper>::value && + !black_magic::CallHelper>::value && + black_magic::CallHelper>::value, + void>::type + wrapped_handler_call(crow::request& req, crow::response& res, const F& f, Args&&... args) + { + static_assert(std::is_same(), std::declval(), std::declval()...))>::value, + "Handler function with response argument should have void return type"); + + f(req, res, std::forward(args)...); + } + + // wrapped_handler_call transparently wraps a handler call behind (req, res, args...) + template + typename std::enable_if< + !black_magic::CallHelper>::value && + !black_magic::CallHelper>::value && + !black_magic::CallHelper>::value && + !black_magic::CallHelper>::value, + void>::type + wrapped_handler_call(crow::request& req, crow::response& res, const F& f, Args&&... args) + { + static_assert(std::is_same(), std::declval(), std::declval()...))>::value, + "Handler function with response argument should have void return type"); + + f(req, res, std::forward(args)...); + } + + template + struct middleware_call_criteria_dynamic + {}; + + template<> + struct middleware_call_criteria_dynamic + { + middleware_call_criteria_dynamic(const std::vector& indices): + indices(indices), slider(0) {} + + template + bool enabled(int mw_index) const + { + if (slider < int(indices.size()) && indices[slider] == mw_index) + { + slider++; + return true; + } + return false; + } + + private: + const std::vector& indices; + mutable int slider; + }; + + template<> + struct middleware_call_criteria_dynamic + { + middleware_call_criteria_dynamic(const std::vector& indices): + indices(indices), slider(int(indices.size()) - 1) {} + + template + bool enabled(int mw_index) const + { + if (slider >= 0 && indices[slider] == mw_index) + { + slider--; + return true; + } + return false; + } + + private: + const std::vector& indices; + mutable int slider; + }; + + } // namespace detail +} // namespace crow diff --git a/src/lib/crow/middleware_context.h b/src/lib/crow/middleware_context.h new file mode 100644 index 0000000..9587bc4 --- /dev/null +++ b/src/lib/crow/middleware_context.h @@ -0,0 +1,60 @@ +#pragma once + +#include "crow/utility.h" +#include "crow/http_request.h" +#include "crow/http_response.h" + +namespace crow +{ + namespace detail + { + + + template + struct partial_context : public black_magic::pop_back::template rebind, public black_magic::last_element_type::type::context + { + using parent_context = typename black_magic::pop_back::template rebind<::crow::detail::partial_context>; + template + using partial = typename std::conditional>::type; + + template + typename T::context& get() + { + return static_cast(*this); + } + }; + + + + template<> + struct partial_context<> + { + template + using partial = partial_context; + }; + + + template + struct context : private partial_context + //struct context : private Middlewares::context... // simple but less type-safe + { + template + friend typename std::enable_if<(N == 0)>::type after_handlers_call_helper(const CallCriteria& cc, Container& middlewares, Context& ctx, request& req, response& res); + template + friend typename std::enable_if<(N > 0)>::type after_handlers_call_helper(const CallCriteria& cc, Container& middlewares, Context& ctx, request& req, response& res); + + template + friend typename std::enable_if<(N < std::tuple_size::type>::value), bool>::type + middleware_call_helper(const CallCriteria& cc, Container& middlewares, request& req, response& res, Context& ctx); + + template + typename T::context& get() + { + return static_cast(*this); + } + + template + using partial = typename partial_context::template partial; + }; + } // namespace detail +} // namespace crow diff --git a/src/lib/crow/middlewares/cookie_parser.h b/src/lib/crow/middlewares/cookie_parser.h new file mode 100644 index 0000000..9d06560 --- /dev/null +++ b/src/lib/crow/middlewares/cookie_parser.h @@ -0,0 +1,307 @@ +#pragma once +#include +#include +#include "crow/utility.h" +#include "crow/http_request.h" +#include "crow/http_response.h" + +namespace crow +{ + // Any middleware requires following 3 members: + + // struct context; + // storing data for the middleware; can be read from another middleware or handlers + + // before_handle + // called before handling the request. + // if res.end() is called, the operation is halted. + // (still call after_handle of this middleware) + // 2 signatures: + // void before_handle(request& req, response& res, context& ctx) + // if you only need to access this middlewares context. + // template + // void before_handle(request& req, response& res, context& ctx, AllContext& all_ctx) + // you can access another middlewares' context by calling `all_ctx.template get()' + // ctx == all_ctx.template get() + + // after_handle + // called after handling the request. + // void after_handle(request& req, response& res, context& ctx) + // template + // void after_handle(request& req, response& res, context& ctx, AllContext& all_ctx) + + struct CookieParser + { + // Cookie stores key, value and attributes + struct Cookie + { + enum class SameSitePolicy + { + Strict, + Lax, + None + }; + + template + Cookie(const std::string& key, U&& value): + Cookie() + { + key_ = key; + value_ = std::forward(value); + } + + Cookie(const std::string& key): + Cookie(key, "") {} + + // format cookie to HTTP header format + std::string dump() const + { + const static char* HTTP_DATE_FORMAT = "%a, %d %b %Y %H:%M:%S GMT"; + + std::stringstream ss; + ss << key_ << '='; + ss << (value_.empty() ? "\"\"" : value_); + dumpString(ss, !domain_.empty(), "Domain=", domain_); + dumpString(ss, !path_.empty(), "Path=", path_); + dumpString(ss, secure_, "Secure"); + dumpString(ss, httponly_, "HttpOnly"); + if (expires_at_) + { + ss << DIVIDER << "Expires=" + << std::put_time(expires_at_.get(), HTTP_DATE_FORMAT); + } + if (max_age_) + { + ss << DIVIDER << "Max-Age=" << *max_age_; + } + if (same_site_) + { + ss << DIVIDER << "SameSite="; + switch (*same_site_) + { + case SameSitePolicy::Strict: + ss << "Strict"; + break; + case SameSitePolicy::Lax: + ss << "Lax"; + break; + case SameSitePolicy::None: + ss << "None"; + break; + } + } + return ss.str(); + } + + const std::string& name() + { + return key_; + } + + template + Cookie& value(U&& value) + { + value_ = std::forward(value); + return *this; + } + + // Expires attribute + Cookie& expires(const std::tm& time) + { + expires_at_ = std::unique_ptr(new std::tm(time)); + return *this; + } + + // Max-Age attribute + Cookie& max_age(long long seconds) + { + max_age_ = std::unique_ptr(new long long(seconds)); + return *this; + } + + // Domain attribute + Cookie& domain(const std::string& name) + { + domain_ = name; + return *this; + } + + // Path attribute + Cookie& path(const std::string& path) + { + path_ = path; + return *this; + } + + // Secured attribute + Cookie& secure() + { + secure_ = true; + return *this; + } + + // HttpOnly attribute + Cookie& httponly() + { + httponly_ = true; + return *this; + } + + // SameSite attribute + Cookie& same_site(SameSitePolicy ssp) + { + same_site_ = std::unique_ptr(new SameSitePolicy(ssp)); + return *this; + } + + Cookie(const Cookie& c): + key_(c.key_), + value_(c.value_), + domain_(c.domain_), + path_(c.path_), + secure_(c.secure_), + httponly_(c.httponly_) + { + if (c.max_age_) + max_age_ = std::unique_ptr(new long long(*c.max_age_)); + + if (c.expires_at_) + expires_at_ = std::unique_ptr(new std::tm(*c.expires_at_)); + + if (c.same_site_) + same_site_ = std::unique_ptr(new SameSitePolicy(*c.same_site_)); + } + + private: + Cookie() = default; + + static void dumpString(std::stringstream& ss, bool cond, const char* prefix, + const std::string& value = "") + { + if (cond) + { + ss << DIVIDER << prefix << value; + } + } + + private: + std::string key_; + std::string value_; + std::unique_ptr max_age_{}; + std::string domain_ = ""; + std::string path_ = ""; + bool secure_ = false; + bool httponly_ = false; + std::unique_ptr expires_at_{}; + std::unique_ptr same_site_{}; + + static constexpr const char* DIVIDER = "; "; + }; + + + struct context + { + std::unordered_map jar; + + std::string get_cookie(const std::string& key) const + { + auto cookie = jar.find(key); + if (cookie != jar.end()) + return cookie->second; + return {}; + } + + template + Cookie& set_cookie(const std::string& key, U&& value) + { + cookies_to_add.emplace_back(key, std::forward(value)); + return cookies_to_add.back(); + } + + Cookie& set_cookie(Cookie cookie) + { + cookies_to_add.push_back(std::move(cookie)); + return cookies_to_add.back(); + } + + private: + friend struct CookieParser; + std::vector cookies_to_add; + }; + + void before_handle(request& req, response& res, context& ctx) + { + // TODO(dranikpg): remove copies, use string_view with c++17 + int count = req.headers.count("Cookie"); + if (!count) + return; + if (count > 1) + { + res.code = 400; + res.end(); + return; + } + std::string cookies = req.get_header_value("Cookie"); + size_t pos = 0; + while (pos < cookies.size()) + { + size_t pos_equal = cookies.find('=', pos); + if (pos_equal == cookies.npos) + break; + std::string name = cookies.substr(pos, pos_equal - pos); + name = utility::trim(name); + pos = pos_equal + 1; + if (pos == cookies.size()) + break; + + size_t pos_semicolon = cookies.find(';', pos); + std::string value = cookies.substr(pos, pos_semicolon - pos); + + value = utility::trim(value); + if (value[0] == '"' && value[value.size() - 1] == '"') + { + value = value.substr(1, value.size() - 2); + } + + ctx.jar.emplace(std::move(name), std::move(value)); + + pos = pos_semicolon; + if (pos == cookies.npos) + break; + pos++; + } + } + + void after_handle(request& /*req*/, response& res, context& ctx) + { + for (const auto& cookie : ctx.cookies_to_add) + { + res.add_header("Set-Cookie", cookie.dump()); + } + } + }; + + /* + App app; + A B C + A::context + int aa; + + ctx1 : public A::context + ctx2 : public ctx1, public B::context + ctx3 : public ctx2, public C::context + + C depends on A + + C::handle + context.aaa + + App::context : private CookieParser::context, ... + { + jar + + } + + SimpleApp + */ +} // namespace crow diff --git a/src/lib/crow/middlewares/cors.h b/src/lib/crow/middlewares/cors.h new file mode 100644 index 0000000..fd5ab07 --- /dev/null +++ b/src/lib/crow/middlewares/cors.h @@ -0,0 +1,200 @@ +#pragma once +#include "crow/http_request.h" +#include "crow/http_response.h" +#include "crow/routing.h" + +namespace crow +{ + struct CORSHandler; + + /// Used for tuning CORS policies + struct CORSRules + { + friend struct crow::CORSHandler; + + /// Set Access-Control-Allow-Origin. Default is "*" + CORSRules& origin(const std::string& origin) + { + origin_ = origin; + return *this; + } + + /// Set Access-Control-Allow-Methods. Default is "*" + CORSRules& methods(crow::HTTPMethod method) + { + add_list_item(methods_, crow::method_name(method)); + return *this; + } + + /// Set Access-Control-Allow-Methods. Default is "*" + template + CORSRules& methods(crow::HTTPMethod method, Methods... method_list) + { + add_list_item(methods_, crow::method_name(method)); + methods(method_list...); + return *this; + } + + /// Set Access-Control-Allow-Headers. Default is "*" + CORSRules& headers(const std::string& header) + { + add_list_item(headers_, header); + return *this; + } + + /// Set Access-Control-Allow-Headers. Default is "*" + template + CORSRules& headers(const std::string& header, Headers... header_list) + { + add_list_item(headers_, header); + headers(header_list...); + return *this; + } + + /// Set Access-Control-Max-Age. Default is none + CORSRules& max_age(int max_age) + { + max_age_ = std::to_string(max_age); + return *this; + } + + /// Enable Access-Control-Allow-Credentials + CORSRules& allow_credentials() + { + allow_credentials_ = true; + return *this; + } + + /// Ignore CORS and don't send any headers + void ignore() + { + ignore_ = true; + } + + /// Handle CORS on specific prefix path + CORSRules& prefix(const std::string& prefix); + + /// Handle CORS for specific blueprint + CORSRules& blueprint(const Blueprint& bp); + + /// Global CORS policy + CORSRules& global(); + + private: + CORSRules() = delete; + CORSRules(CORSHandler* handler): + handler_(handler) {} + + /// build comma separated list + void add_list_item(std::string& list, const std::string& val) + { + if (list == "*") list = ""; + if (list.size() > 0) list += ", "; + list += val; + } + + /// Set header `key` to `value` if it is not set + void set_header_no_override(const std::string& key, const std::string& value, crow::response& res) + { + if (value.size() == 0) return; + if (!get_header_value(res.headers, key).empty()) return; + res.add_header(key, value); + } + + /// Set response headers + void apply(crow::response& res) + { + if (ignore_) return; + set_header_no_override("Access-Control-Allow-Origin", origin_, res); + set_header_no_override("Access-Control-Allow-Methods", methods_, res); + set_header_no_override("Access-Control-Allow-Headers", headers_, res); + set_header_no_override("Access-Control-Max-Age", max_age_, res); + if (allow_credentials_) set_header_no_override("Access-Control-Allow-Credentials", "true", res); + } + + bool ignore_ = false; + // TODO: support multiple origins that are dynamically selected + std::string origin_ = "*"; + std::string methods_ = "*"; + std::string headers_ = "*"; + std::string max_age_; + bool allow_credentials_ = false; + + CORSHandler* handler_; + }; + + /// CORSHandler is a global middleware for setting CORS headers. + + /// + /// By default, it sets Access-Control-Allow-Origin/Methods/Headers to "*". + /// The default behaviour can be changed with the `global()` cors rule. + /// Additional rules for prexies can be added with `prefix()`. + struct CORSHandler + { + struct context + {}; + + void before_handle(crow::request& /*req*/, crow::response& /*res*/, context& /*ctx*/) + {} + + void after_handle(crow::request& req, crow::response& res, context& /*ctx*/) + { + auto& rule = find_rule(req.url); + rule.apply(res); + } + + /// Handle CORS on a specific prefix path + CORSRules& prefix(const std::string& prefix) + { + rules.emplace_back(prefix, CORSRules(this)); + return rules.back().second; + } + + /// Handle CORS for a specific blueprint + CORSRules& blueprint(const Blueprint& bp) + { + rules.emplace_back(bp.prefix(), CORSRules(this)); + return rules.back().second; + } + + /// Get the global CORS policy + CORSRules& global() + { + return default_; + } + + private: + CORSRules& find_rule(const std::string& path) + { + // TODO: use a trie in case of many rules + for (auto& rule : rules) + { + // Check if path starts with a rules prefix + if (path.rfind(rule.first, 0) == 0) + { + return rule.second; + } + } + return default_; + } + + std::vector> rules; + CORSRules default_ = CORSRules(this); + }; + + inline CORSRules& CORSRules::prefix(const std::string& prefix) + { + return handler_->prefix(prefix); + } + + inline CORSRules& CORSRules::blueprint(const Blueprint& bp) + { + return handler_->blueprint(bp); + } + + inline CORSRules& CORSRules::global() + { + return handler_->global(); + } + +} // namespace crow diff --git a/src/lib/crow/middlewares/session.h b/src/lib/crow/middlewares/session.h new file mode 100644 index 0000000..8715c79 --- /dev/null +++ b/src/lib/crow/middlewares/session.h @@ -0,0 +1,604 @@ +#pragma once + +#include "crow/http_request.h" +#include "crow/http_response.h" +#include "crow/json.h" +#include "crow/utility.h" +#include "crow/middlewares/cookie_parser.h" + +#include +#include +#include +#include + +#include +#include +#include +#include + +#include +#include + +#include +#include +#include + +#ifdef CROW_CAN_USE_CPP17 +#include +#endif + +namespace +{ + // convert all integer values to int64_t + template + using wrap_integral_t = typename std::conditional< + std::is_integral::value && !std::is_same::value + // except for uint64_t because that could lead to overflow on conversion + && !std::is_same::value, + int64_t, T>::type; + + // convert char[]/char* to std::string + template + using wrap_char_t = typename std::conditional< + std::is_same::type, char*>::value, + std::string, T>::type; + + // Upgrade to correct type for multi_variant use + template + using wrap_mv_t = wrap_char_t>; +} // namespace + +namespace crow +{ + namespace session + { + +#ifdef CROW_CAN_USE_CPP17 + using multi_value_types = black_magic::S; + + /// A multi_value is a safe variant wrapper with json conversion support + struct multi_value + { + json::wvalue json() const + { + // clang-format off + return std::visit([](auto arg) { + return json::wvalue(arg); + }, v_); + // clang-format on + } + + static multi_value from_json(const json::rvalue&); + + std::string string() const + { + // clang-format off + return std::visit([](auto arg) { + if constexpr (std::is_same_v) + return arg; + else + return std::to_string(arg); + }, v_); + // clang-format on + } + + template> + RT get(const T& fallback) + { + if (const RT* val = std::get_if(&v_)) return *val; + return fallback; + } + + template> + void set(T val) + { + v_ = RT(std::move(val)); + } + + typename multi_value_types::rebind v_; + }; + + inline multi_value multi_value::from_json(const json::rvalue& rv) + { + using namespace json; + switch (rv.t()) + { + case type::Number: + { + if (rv.nt() == num_type::Floating_point) + return multi_value{rv.d()}; + else if (rv.nt() == num_type::Unsigned_integer) + return multi_value{int64_t(rv.u())}; + else + return multi_value{rv.i()}; + } + case type::False: return multi_value{false}; + case type::True: return multi_value{true}; + case type::String: return multi_value{std::string(rv)}; + default: return multi_value{false}; + } + } +#else + // Fallback for C++11/14 that uses a raw json::wvalue internally. + // This implementation consumes significantly more memory + // than the variant-based version + struct multi_value + { + json::wvalue json() const { return v_; } + + static multi_value from_json(const json::rvalue&); + + std::string string() const { return v_.dump(); } + + template> + RT get(const T& fallback) + { + return json::wvalue_reader{v_}.get((const RT&)(fallback)); + } + + template> + void set(T val) + { + v_ = RT(std::move(val)); + } + + json::wvalue v_; + }; + + inline multi_value multi_value::from_json(const json::rvalue& rv) + { + return {rv}; + } +#endif + + /// Expiration tracker keeps track of soonest-to-expire keys + struct ExpirationTracker + { + using DataPair = std::pair; + + /// Add key with time to tracker. + /// If the key is already present, it will be updated + void add(std::string key, uint64_t time) + { + auto it = times_.find(key); + if (it != times_.end()) remove(key); + times_[key] = time; + queue_.insert({time, std::move(key)}); + } + + void remove(const std::string& key) + { + auto it = times_.find(key); + if (it != times_.end()) + { + queue_.erase({it->second, key}); + times_.erase(it); + } + } + + /// Get expiration time of soonest-to-expire entry + uint64_t peek_first() const + { + if (queue_.empty()) return std::numeric_limits::max(); + return queue_.begin()->first; + } + + std::string pop_first() + { + auto it = times_.find(queue_.begin()->second); + auto key = it->first; + times_.erase(it); + queue_.erase(queue_.begin()); + return key; + } + + using iterator = typename std::set::const_iterator; + + iterator begin() const { return queue_.cbegin(); } + + iterator end() const { return queue_.cend(); } + + private: + std::set queue_; + std::unordered_map times_; + }; + + /// CachedSessions are shared across requests + struct CachedSession + { + std::string session_id; + std::string requested_session_id; // session hasn't been created yet, but a key was requested + + std::unordered_map entries; + std::unordered_set dirty; // values that were changed after last load + + void* store_data; + bool requested_refresh; + + // number of references held - used for correctly destroying the cache. + // No need to be atomic, all SessionMiddleware accesses are synchronized + int referrers; + std::recursive_mutex mutex; + }; + } // namespace session + + // SessionMiddleware allows storing securely and easily small snippets of user information + template + struct SessionMiddleware + { +#ifdef CROW_CAN_USE_CPP17 + using lock = std::scoped_lock; + using rc_lock = std::scoped_lock; +#else + using lock = std::lock_guard; + using rc_lock = std::lock_guard; +#endif + + struct context + { + // Get a mutex for locking this session + std::recursive_mutex& mutex() + { + check_node(); + return node->mutex; + } + + // Check whether this session is already present + bool exists() { return bool(node); } + + // Get a value by key or fallback if it doesn't exist or is of another type + template + auto get(const std::string& key, const F& fallback = F()) + // This trick lets the multi_value deduce the return type from the fallback + // which allows both: + // context.get("key") + // context.get("key", "") -> char[] is transformed into string by multivalue + // to return a string + -> decltype(std::declval().get(std::declval())) + { + if (!node) return fallback; + rc_lock l(node->mutex); + + auto it = node->entries.find(key); + if (it != node->entries.end()) return it->second.get(fallback); + return fallback; + } + + // Set a value by key + template + void set(const std::string& key, T value) + { + check_node(); + rc_lock l(node->mutex); + + node->dirty.insert(key); + node->entries[key].set(std::move(value)); + } + + bool contains(const std::string& key) + { + if (!node) return false; + return node->entries.find(key) != node->entries.end(); + } + + // Atomically mutate a value with a function + template + void apply(const std::string& key, const Func& f) + { + using traits = utility::function_traits; + using arg = typename std::decay>::type; + using retv = typename std::decay::type; + check_node(); + rc_lock l(node->mutex); + node->dirty.insert(key); + node->entries[key].set(f(node->entries[key].get(arg{}))); + } + + // Remove a value from the session + void remove(const std::string& key) + { + if (!node) return; + rc_lock l(node->mutex); + node->dirty.insert(key); + node->entries.erase(key); + } + + // Format value by key as a string + std::string string(const std::string& key) + { + if (!node) return ""; + rc_lock l(node->mutex); + + auto it = node->entries.find(key); + if (it != node->entries.end()) return it->second.string(); + return ""; + } + + // Get a list of keys present in session + std::vector keys() + { + if (!node) return {}; + rc_lock l(node->mutex); + + std::vector out; + for (const auto& p : node->entries) + out.push_back(p.first); + return out; + } + + // Delay expiration by issuing another cookie with an updated expiration time + // and notifying the store + void refresh_expiration() + { + if (!node) return; + node->requested_refresh = true; + } + + private: + friend struct SessionMiddleware; + + void check_node() + { + if (!node) node = std::make_shared(); + } + + std::shared_ptr node; + }; + + template + SessionMiddleware( + CookieParser::Cookie cookie, + int id_length, + Ts... ts): + id_length_(id_length), + cookie_(cookie), + store_(std::forward(ts)...), mutex_(new std::mutex{}) + {} + + template + SessionMiddleware(Ts... ts): + SessionMiddleware( + CookieParser::Cookie("session").path("/").max_age(/*month*/ 30 * 24 * 60 * 60), + /*id_length */ 20, // around 10^34 possible combinations, but small enough to fit into SSO + std::forward(ts)...) + {} + + template + void before_handle(request& /*req*/, response& /*res*/, context& ctx, AllContext& all_ctx) + { + lock l(*mutex_); + + auto& cookies = all_ctx.template get(); + auto session_id = load_id(cookies); + if (session_id == "") return; + + // search entry in cache + auto it = cache_.find(session_id); + if (it != cache_.end()) + { + it->second->referrers++; + ctx.node = it->second; + return; + } + + // check this is a valid entry before loading + if (!store_.contains(session_id)) return; + + auto node = std::make_shared(); + node->session_id = session_id; + node->referrers = 1; + + try + { + store_.load(*node); + } + catch (...) + { + CROW_LOG_ERROR << "Exception occurred during session load"; + return; + } + + ctx.node = node; + cache_[session_id] = node; + } + + template + void after_handle(request& /*req*/, response& /*res*/, context& ctx, AllContext& all_ctx) + { + lock l(*mutex_); + if (!ctx.node || --ctx.node->referrers > 0) return; + ctx.node->requested_refresh |= ctx.node->session_id == ""; + + // generate new id + if (ctx.node->session_id == "") + { + // check for requested id + ctx.node->session_id = std::move(ctx.node->requested_session_id); + if (ctx.node->session_id == "") + { + ctx.node->session_id = utility::random_alphanum(id_length_); + } + } + else + { + cache_.erase(ctx.node->session_id); + } + + if (ctx.node->requested_refresh) + { + auto& cookies = all_ctx.template get(); + store_id(cookies, ctx.node->session_id); + } + + try + { + store_.save(*ctx.node); + } + catch (...) + { + CROW_LOG_ERROR << "Exception occurred during session save"; + return; + } + } + + private: + std::string next_id() + { + std::string id; + do + { + id = utility::random_alphanum(id_length_); + } while (store_.contains(id)); + return id; + } + + std::string load_id(const CookieParser::context& cookies) + { + return cookies.get_cookie(cookie_.name()); + } + + void store_id(CookieParser::context& cookies, const std::string& session_id) + { + cookie_.value(session_id); + cookies.set_cookie(cookie_); + } + + private: + int id_length_; + + // prototype for cookie + CookieParser::Cookie cookie_; + + Store store_; + + // mutexes are immovable + std::unique_ptr mutex_; + std::unordered_map> cache_; + }; + + /// InMemoryStore stores all entries in memory + struct InMemoryStore + { + // Load a value into the session cache. + // A load is always followed by a save, no loads happen consecutively + void load(session::CachedSession& cn) + { + // load & stores happen sequentially, so moving is safe + cn.entries = std::move(entries[cn.session_id]); + } + + // Persist session data + void save(session::CachedSession& cn) + { + entries[cn.session_id] = std::move(cn.entries); + // cn.dirty is a list of changed keys since the last load + } + + bool contains(const std::string& key) + { + return entries.count(key) > 0; + } + + std::unordered_map> entries; + }; + + // FileStore stores all data as json files in a folder. + // Files are deleted after expiration. Expiration refreshes are automatically picked up. + struct FileStore + { + FileStore(const std::string& folder, uint64_t expiration_seconds = /*month*/ 30 * 24 * 60 * 60): + path_(folder), expiration_seconds_(expiration_seconds) + { + std::ifstream ifs(get_filename(".expirations", false)); + + auto current_ts = chrono_time(); + std::string key; + uint64_t time; + while (ifs >> key >> time) + { + if (current_ts > time) + { + evict(key); + } + else if (contains(key)) + { + expirations_.add(key, time); + } + } + } + + ~FileStore() + { + std::ofstream ofs(get_filename(".expirations", false), std::ios::trunc); + for (const auto& p : expirations_) + ofs << p.second << " " << p.first << "\n"; + } + + // Delete expired entries + // At most 3 to prevent freezes + void handle_expired() + { + int deleted = 0; + auto current_ts = chrono_time(); + while (current_ts > expirations_.peek_first() && deleted < 3) + { + evict(expirations_.pop_first()); + deleted++; + } + } + + void load(session::CachedSession& cn) + { + handle_expired(); + + std::ifstream file(get_filename(cn.session_id)); + + std::stringstream buffer; + buffer << file.rdbuf() << std::endl; + + for (const auto& p : json::load(buffer.str())) + cn.entries[p.key()] = session::multi_value::from_json(p); + } + + void save(session::CachedSession& cn) + { + if (cn.requested_refresh) + expirations_.add(cn.session_id, chrono_time() + expiration_seconds_); + if (cn.dirty.empty()) return; + + std::ofstream file(get_filename(cn.session_id)); + json::wvalue jw; + for (const auto& p : cn.entries) + jw[p.first] = p.second.json(); + file << jw.dump() << std::flush; + } + + std::string get_filename(const std::string& key, bool suffix = true) + { + return utility::join_path(path_, key + (suffix ? ".json" : "")); + } + + bool contains(const std::string& key) + { + std::ifstream file(get_filename(key)); + return file.good(); + } + + void evict(const std::string& key) + { + std::remove(get_filename(key).c_str()); + } + + uint64_t chrono_time() const + { + return std::chrono::duration_cast( + std::chrono::system_clock::now().time_since_epoch()) + .count(); + } + + std::string path_; + uint64_t expiration_seconds_; + session::ExpirationTracker expirations_; + }; + +} // namespace crow diff --git a/src/lib/crow/middlewares/utf-8.h b/src/lib/crow/middlewares/utf-8.h new file mode 100644 index 0000000..a3f89e4 --- /dev/null +++ b/src/lib/crow/middlewares/utf-8.h @@ -0,0 +1,25 @@ +#pragma once +#include "crow/http_request.h" +#include "crow/http_response.h" + +namespace crow +{ + + struct UTF8 + { + struct context + {}; + + void before_handle(request& /*req*/, response& /*res*/, context& /*ctx*/) + {} + + void after_handle(request& /*req*/, response& res, context& /*ctx*/) + { + if (get_header_value(res.headers, "Content-Type").empty()) + { + res.set_header("Content-Type", "text/plain; charset=utf-8"); + } + } + }; + +} // namespace crow diff --git a/src/lib/crow/mime_types.h b/src/lib/crow/mime_types.h new file mode 100644 index 0000000..7cf96c2 --- /dev/null +++ b/src/lib/crow/mime_types.h @@ -0,0 +1,118 @@ +// This file is generated from nginx/conf/mime.types using nginx_mime2cpp.py on 2021-12-03. +#include +#include + +namespace crow +{ + const std::unordered_map mime_types{ + {"shtml", "text/html"}, + {"htm", "text/html"}, + {"html", "text/html"}, + {"css", "text/css"}, + {"xml", "text/xml"}, + {"gif", "image/gif"}, + {"jpg", "image/jpeg"}, + {"jpeg", "image/jpeg"}, + {"js", "application/javascript"}, + {"atom", "application/atom+xml"}, + {"rss", "application/rss+xml"}, + {"mml", "text/mathml"}, + {"txt", "text/plain"}, + {"jad", "text/vnd.sun.j2me.app-descriptor"}, + {"wml", "text/vnd.wap.wml"}, + {"htc", "text/x-component"}, + {"avif", "image/avif"}, + {"png", "image/png"}, + {"svgz", "image/svg+xml"}, + {"svg", "image/svg+xml"}, + {"tiff", "image/tiff"}, + {"tif", "image/tiff"}, + {"wbmp", "image/vnd.wap.wbmp"}, + {"webp", "image/webp"}, + {"ico", "image/x-icon"}, + {"jng", "image/x-jng"}, + {"bmp", "image/x-ms-bmp"}, + {"woff", "font/woff"}, + {"woff2", "font/woff2"}, + {"ear", "application/java-archive"}, + {"war", "application/java-archive"}, + {"jar", "application/java-archive"}, + {"json", "application/json"}, + {"hqx", "application/mac-binhex40"}, + {"doc", "application/msword"}, + {"pdf", "application/pdf"}, + {"ai", "application/postscript"}, + {"eps", "application/postscript"}, + {"ps", "application/postscript"}, + {"rtf", "application/rtf"}, + {"m3u8", "application/vnd.apple.mpegurl"}, + {"kml", "application/vnd.google-earth.kml+xml"}, + {"kmz", "application/vnd.google-earth.kmz"}, + {"xls", "application/vnd.ms-excel"}, + {"eot", "application/vnd.ms-fontobject"}, + {"ppt", "application/vnd.ms-powerpoint"}, + {"odg", "application/vnd.oasis.opendocument.graphics"}, + {"odp", "application/vnd.oasis.opendocument.presentation"}, + {"ods", "application/vnd.oasis.opendocument.spreadsheet"}, + {"odt", "application/vnd.oasis.opendocument.text"}, + {"pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation"}, + {"xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"}, + {"docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document"}, + {"wmlc", "application/vnd.wap.wmlc"}, + {"wasm", "application/wasm"}, + {"7z", "application/x-7z-compressed"}, + {"cco", "application/x-cocoa"}, + {"jardiff", "application/x-java-archive-diff"}, + {"jnlp", "application/x-java-jnlp-file"}, + {"run", "application/x-makeself"}, + {"pm", "application/x-perl"}, + {"pl", "application/x-perl"}, + {"pdb", "application/x-pilot"}, + {"prc", "application/x-pilot"}, + {"rar", "application/x-rar-compressed"}, + {"rpm", "application/x-redhat-package-manager"}, + {"sea", "application/x-sea"}, + {"swf", "application/x-shockwave-flash"}, + {"sit", "application/x-stuffit"}, + {"tk", "application/x-tcl"}, + {"tcl", "application/x-tcl"}, + {"crt", "application/x-x509-ca-cert"}, + {"pem", "application/x-x509-ca-cert"}, + {"der", "application/x-x509-ca-cert"}, + {"xpi", "application/x-xpinstall"}, + {"xhtml", "application/xhtml+xml"}, + {"xspf", "application/xspf+xml"}, + {"zip", "application/zip"}, + {"dll", "application/octet-stream"}, + {"exe", "application/octet-stream"}, + {"bin", "application/octet-stream"}, + {"deb", "application/octet-stream"}, + {"dmg", "application/octet-stream"}, + {"img", "application/octet-stream"}, + {"iso", "application/octet-stream"}, + {"msm", "application/octet-stream"}, + {"msp", "application/octet-stream"}, + {"msi", "application/octet-stream"}, + {"kar", "audio/midi"}, + {"midi", "audio/midi"}, + {"mid", "audio/midi"}, + {"mp3", "audio/mpeg"}, + {"ogg", "audio/ogg"}, + {"m4a", "audio/x-m4a"}, + {"ra", "audio/x-realaudio"}, + {"3gp", "video/3gpp"}, + {"3gpp", "video/3gpp"}, + {"ts", "video/mp2t"}, + {"mp4", "video/mp4"}, + {"mpg", "video/mpeg"}, + {"mpeg", "video/mpeg"}, + {"mov", "video/quicktime"}, + {"webm", "video/webm"}, + {"flv", "video/x-flv"}, + {"m4v", "video/x-m4v"}, + {"mng", "video/x-mng"}, + {"asf", "video/x-ms-asf"}, + {"asx", "video/x-ms-asf"}, + {"wmv", "video/x-ms-wmv"}, + {"avi", "video/x-msvideo"}}; +} diff --git a/src/lib/crow/multipart.h b/src/lib/crow/multipart.h new file mode 100644 index 0000000..f7b6c24 --- /dev/null +++ b/src/lib/crow/multipart.h @@ -0,0 +1,273 @@ +#pragma once + +#include +#include +#include + +#include "crow/http_request.h" +#include "crow/returnable.h" +#include "crow/ci_map.h" + +namespace crow +{ + + /// Encapsulates anything related to processing and organizing `multipart/xyz` messages + namespace multipart + { + + const std::string dd = "--"; + + /// The first part in a section, contains metadata about the part + struct header + { + std::string value; ///< The first part of the header, usually `Content-Type` or `Content-Disposition` + std::unordered_map params; ///< The parameters of the header, come after the `value` + + operator int() const { return std::stoi(value); } ///< Returns \ref value as integer + operator double() const { return std::stod(value); } ///< Returns \ref value as double + }; + + /// Multipart header map (key is header key). + using mph_map = std::unordered_multimap; + + /// Find and return the value object associated with the key. (returns an empty class if nothing is found) + template + inline const O& get_header_value_object(const T& headers, const std::string& key) + { + if (headers.count(key)) + { + return headers.find(key)->second; + } + static O empty; + return empty; + } + + /// Same as \ref get_header_value_object() but for \ref multipart.header + template + inline const header& get_header_object(const T& headers, const std::string& key) + { + return get_header_value_object
(headers, key); + } + + ///One part of the multipart message + + /// + /// It is usually separated from other sections by a `boundary` + struct part + { + mph_map headers; ///< (optional) The first part before the data, Contains information regarding the type of data and encoding + std::string body; ///< The actual data in the part + + operator int() const { return std::stoi(body); } ///< Returns \ref body as integer + operator double() const { return std::stod(body); } ///< Returns \ref body as double + + const header& get_header_object(const std::string& key) const + { + return multipart::get_header_object(headers, key); + } + }; + + /// Multipart map (key is the name parameter). + using mp_map = std::unordered_multimap; + + /// The parsed multipart request/response + struct message : public returnable + { + ci_map headers; ///< The request/response headers + std::string boundary; ///< The text boundary that separates different `parts` + std::vector parts; ///< The individual parts of the message + mp_map part_map; ///< The individual parts of the message, organized in a map with the `name` header parameter being the key + + const std::string& get_header_value(const std::string& key) const + { + return crow::get_header_value(headers, key); + } + + part get_part_by_name(const std::string& name) + { + mp_map::iterator result = part_map.find(name); + if (result != part_map.end()) + return result->second; + else + return {}; + } + + /// Represent all parts as a string (**does not include message headers**) + std::string dump() const override + { + std::stringstream str; + std::string delimiter = dd + boundary; + + for (unsigned i = 0; i < parts.size(); i++) + { + str << delimiter << crlf; + str << dump(i); + } + str << delimiter << dd << crlf; + return str.str(); + } + + /// Represent an individual part as a string + std::string dump(int part_) const + { + std::stringstream str; + part item = parts[part_]; + for (auto& item_h : item.headers) + { + str << item_h.first << ": " << item_h.second.value; + for (auto& it : item_h.second.params) + { + str << "; " << it.first << '=' << pad(it.second); + } + str << crlf; + } + str << crlf; + str << item.body << crlf; + return str.str(); + } + + /// Default constructor using default values + message(const ci_map& headers, const std::string& boundary, const std::vector& sections): + returnable("multipart/form-data; boundary=CROW-BOUNDARY"), headers(headers), boundary(boundary), parts(sections) + { + if (!boundary.empty()) + content_type = "multipart/form-data; boundary=" + boundary; + for (auto& item : parts) + { + part_map.emplace( + (get_header_object(item.headers, "Content-Disposition").params.find("name")->second), + item); + } + } + + /// Create a multipart message from a request data + message(const request& req): + returnable("multipart/form-data; boundary=CROW-BOUNDARY"), + headers(req.headers), + boundary(get_boundary(get_header_value("Content-Type"))) + { + if (!boundary.empty()) + content_type = "multipart/form-data; boundary=" + boundary; + parse_body(req.body, parts, part_map); + } + + private: + std::string get_boundary(const std::string& header) const + { + constexpr char boundary_text[] = "boundary="; + size_t found = header.find(boundary_text); + if (found != std::string::npos) + { + std::string to_return(header.substr(found + strlen(boundary_text))); + if (to_return[0] == '\"') + { + to_return = to_return.substr(1, to_return.length() - 2); + } + return to_return; + } + return std::string(); + } + + void parse_body(std::string body, std::vector& sections, mp_map& part_map) + { + + std::string delimiter = dd + boundary; + + // TODO(EDev): Exit on error + while (body != (crlf)) + { + size_t found = body.find(delimiter); + if (found == std::string::npos) + { + // did not find delimiter; probably an ill-formed body; ignore the rest + break; + } + std::string section = body.substr(0, found); + + // +2 is the CRLF. + // We don't check it and delete it so that the same delimiter can be used for The last delimiter (--delimiter--CRLF). + body.erase(0, found + delimiter.length() + 2); + if (!section.empty()) + { + part parsed_section(parse_section(section)); + part_map.emplace( + (get_header_object(parsed_section.headers, "Content-Disposition").params.find("name")->second), + parsed_section); + sections.push_back(std::move(parsed_section)); + } + } + } + + part parse_section(std::string& section) + { + struct part to_return; + + size_t found = section.find(crlf + crlf); + std::string head_line = section.substr(0, found + 2); + section.erase(0, found + 4); + + parse_section_head(head_line, to_return); + to_return.body = section.substr(0, section.length() - 2); + return to_return; + } + + void parse_section_head(std::string& lines, part& part) + { + while (!lines.empty()) + { + header to_add; + + size_t found = lines.find(crlf); + std::string line = lines.substr(0, found); + std::string key; + lines.erase(0, found + 2); + // Add the header if available + if (!line.empty()) + { + size_t found = line.find("; "); + std::string header = line.substr(0, found); + if (found != std::string::npos) + line.erase(0, found + 2); + else + line = std::string(); + + size_t header_split = header.find(": "); + key = header.substr(0, header_split); + + to_add.value = header.substr(header_split + 2); + } + + // Add the parameters + while (!line.empty()) + { + size_t found = line.find("; "); + std::string param = line.substr(0, found); + if (found != std::string::npos) + line.erase(0, found + 2); + else + line = std::string(); + + size_t param_split = param.find('='); + + std::string value = param.substr(param_split + 1); + + to_add.params.emplace(param.substr(0, param_split), trim(value)); + } + part.headers.emplace(key, to_add); + } + } + + inline std::string trim(std::string& string, const char& excess = '"') const + { + if (string.length() > 1 && string[0] == excess && string[string.length() - 1] == excess) + return string.substr(1, string.length() - 2); + return string; + } + + inline std::string pad(std::string& string, const char& padding = '"') const + { + return (padding + string + padding); + } + }; + } // namespace multipart +} // namespace crow diff --git a/src/lib/crow/mustache.h b/src/lib/crow/mustache.h new file mode 100644 index 0000000..e47563e --- /dev/null +++ b/src/lib/crow/mustache.h @@ -0,0 +1,721 @@ +#pragma once +#include +#include +#include +#include +#include +#include "crow/json.h" +#include "crow/logging.h" +#include "crow/returnable.h" +#include "crow/utility.h" + +namespace crow +{ + namespace mustache + { + using context = json::wvalue; + + template_t load(const std::string& filename); + + class invalid_template_exception : public std::exception + { + public: + invalid_template_exception(const std::string& msg): + msg("crow::mustache error: " + msg) + {} + virtual const char* what() const throw() + { + return msg.c_str(); + } + std::string msg; + }; + + struct rendered_template : returnable + { + rendered_template(): + returnable("text/html") {} + + rendered_template(std::string& body): + returnable("text/html"), body_(std::move(body)) {} + + std::string body_; + + std::string dump() const override + { + return body_; + } + }; + + enum class ActionType + { + Ignore, + Tag, + UnescapeTag, + OpenBlock, + CloseBlock, + ElseBlock, + Partial, + }; + + struct Action + { + int start; + int end; + int pos; + ActionType t; + Action(ActionType t, size_t start, size_t end, size_t pos = 0): + start(static_cast(start)), end(static_cast(end)), pos(static_cast(pos)), t(t) + { + } + }; + + /// A mustache template object. + class template_t + { + public: + template_t(std::string body): + body_(std::move(body)) + { + // {{ {{# {{/ {{^ {{! {{> {{= + parse(); + } + + private: + std::string tag_name(const Action& action) const + { + return body_.substr(action.start, action.end - action.start); + } + auto find_context(const std::string& name, const std::vector& stack, bool shouldUseOnlyFirstStackValue = false) const -> std::pair + { + if (name == ".") + { + return {true, *stack.back()}; + } + static json::wvalue empty_str; + empty_str = ""; + + int dotPosition = name.find("."); + if (dotPosition == static_cast(name.npos)) + { + for (auto it = stack.rbegin(); it != stack.rend(); ++it) + { + if ((*it)->t() == json::type::Object) + { + if ((*it)->count(name)) + return {true, (**it)[name]}; + } + } + } + else + { + std::vector dotPositions; + dotPositions.push_back(-1); + while (dotPosition != static_cast(name.npos)) + { + dotPositions.push_back(dotPosition); + dotPosition = name.find(".", dotPosition + 1); + } + dotPositions.push_back(name.size()); + std::vector names; + names.reserve(dotPositions.size() - 1); + for (int i = 1; i < static_cast(dotPositions.size()); i++) + names.emplace_back(name.substr(dotPositions[i - 1] + 1, dotPositions[i] - dotPositions[i - 1] - 1)); + + for (auto it = stack.rbegin(); it != stack.rend(); ++it) + { + const context* view = *it; + bool found = true; + for (auto jt = names.begin(); jt != names.end(); ++jt) + { + if (view->t() == json::type::Object && + view->count(*jt)) + { + view = &(*view)[*jt]; + } + else + { + if (shouldUseOnlyFirstStackValue) + { + return {false, empty_str}; + } + found = false; + break; + } + } + if (found) + return {true, *view}; + } + } + + return {false, empty_str}; + } + + void escape(const std::string& in, std::string& out) const + { + out.reserve(out.size() + in.size()); + for (auto it = in.begin(); it != in.end(); ++it) + { + switch (*it) + { + case '&': out += "&"; break; + case '<': out += "<"; break; + case '>': out += ">"; break; + case '"': out += """; break; + case '\'': out += "'"; break; + case '/': out += "/"; break; + case '`': out += "`"; break; + case '=': out += "="; break; + default: out += *it; break; + } + } + } + + bool isTagInsideObjectBlock(const int& current, const std::vector& stack) const + { + int openedBlock = 0; + for (int i = current; i > 0; --i) + { + auto& action = actions_[i - 1]; + + if (action.t == ActionType::OpenBlock) + { + if (openedBlock == 0 && (*stack.rbegin())->t() == json::type::Object) + { + return true; + } + --openedBlock; + } + else if (action.t == ActionType::CloseBlock) + { + ++openedBlock; + } + } + + return false; + } + + void render_internal(int actionBegin, int actionEnd, std::vector& stack, std::string& out, int indent) const + { + int current = actionBegin; + + if (indent) + out.insert(out.size(), indent, ' '); + + while (current < actionEnd) + { + auto& fragment = fragments_[current]; + auto& action = actions_[current]; + render_fragment(fragment, indent, out); + switch (action.t) + { + case ActionType::Ignore: + // do nothing + break; + case ActionType::Partial: + { + std::string partial_name = tag_name(action); + auto partial_templ = load(partial_name); + int partial_indent = action.pos; + partial_templ.render_internal(0, partial_templ.fragments_.size() - 1, stack, out, partial_indent ? indent + partial_indent : 0); + } + break; + case ActionType::UnescapeTag: + case ActionType::Tag: + { + bool shouldUseOnlyFirstStackValue = false; + if (isTagInsideObjectBlock(current, stack)) + { + shouldUseOnlyFirstStackValue = true; + } + auto optional_ctx = find_context(tag_name(action), stack, shouldUseOnlyFirstStackValue); + auto& ctx = optional_ctx.second; + switch (ctx.t()) + { + case json::type::False: + case json::type::True: + case json::type::Number: + out += ctx.dump(); + break; + case json::type::String: + if (action.t == ActionType::Tag) + escape(ctx.s, out); + else + out += ctx.s; + break; + case json::type::Function: + { + std::string execute_result = ctx.execute(); + while (execute_result.find("{{") != std::string::npos) + { + template_t result_plug(execute_result); + execute_result = result_plug.render_string(*(stack[0])); + } + + if (action.t == ActionType::Tag) + escape(execute_result, out); + else + out += execute_result; + } + break; + default: + throw std::runtime_error("not implemented tag type" + utility::lexical_cast(static_cast(ctx.t()))); + } + } + break; + case ActionType::ElseBlock: + { + static context nullContext; + auto optional_ctx = find_context(tag_name(action), stack); + if (!optional_ctx.first) + { + stack.emplace_back(&nullContext); + break; + } + + auto& ctx = optional_ctx.second; + switch (ctx.t()) + { + case json::type::List: + if (ctx.l && !ctx.l->empty()) + current = action.pos; + else + stack.emplace_back(&nullContext); + break; + case json::type::False: + case json::type::Null: + stack.emplace_back(&nullContext); + break; + default: + current = action.pos; + break; + } + break; + } + case ActionType::OpenBlock: + { + auto optional_ctx = find_context(tag_name(action), stack); + if (!optional_ctx.first) + { + current = action.pos; + break; + } + + auto& ctx = optional_ctx.second; + switch (ctx.t()) + { + case json::type::List: + if (ctx.l) + for (auto it = ctx.l->begin(); it != ctx.l->end(); ++it) + { + stack.push_back(&*it); + render_internal(current + 1, action.pos, stack, out, indent); + stack.pop_back(); + } + current = action.pos; + break; + case json::type::Number: + case json::type::String: + case json::type::Object: + case json::type::True: + stack.push_back(&ctx); + break; + case json::type::False: + case json::type::Null: + current = action.pos; + break; + default: + throw std::runtime_error("{{#: not implemented context type: " + utility::lexical_cast(static_cast(ctx.t()))); + break; + } + break; + } + case ActionType::CloseBlock: + stack.pop_back(); + break; + default: + throw std::runtime_error("not implemented " + utility::lexical_cast(static_cast(action.t))); + } + current++; + } + auto& fragment = fragments_[actionEnd]; + render_fragment(fragment, indent, out); + } + void render_fragment(const std::pair fragment, int indent, std::string& out) const + { + if (indent) + { + for (int i = fragment.first; i < fragment.second; i++) + { + out += body_[i]; + if (body_[i] == '\n' && i + 1 != static_cast(body_.size())) + out.insert(out.size(), indent, ' '); + } + } + else + out.insert(out.size(), body_, fragment.first, fragment.second - fragment.first); + } + + public: + /// Output a returnable template from this mustache template + rendered_template render() const + { + context empty_ctx; + std::vector stack; + stack.emplace_back(&empty_ctx); + + std::string ret; + render_internal(0, fragments_.size() - 1, stack, ret, 0); + return rendered_template(ret); + } + + /// Apply the values from the context provided and output a returnable template from this mustache template + rendered_template render(const context& ctx) const + { + std::vector stack; + stack.emplace_back(&ctx); + + std::string ret; + render_internal(0, fragments_.size() - 1, stack, ret, 0); + return rendered_template(ret); + } + + /// Apply the values from the context provided and output a returnable template from this mustache template + rendered_template render(const context&& ctx) const + { + return render(ctx); + } + + /// Output a returnable template from this mustache template + std::string render_string() const + { + context empty_ctx; + std::vector stack; + stack.emplace_back(&empty_ctx); + + std::string ret; + render_internal(0, fragments_.size() - 1, stack, ret, 0); + return ret; + } + + /// Apply the values from the context provided and output a returnable template from this mustache template + std::string render_string(const context& ctx) const + { + std::vector stack; + stack.emplace_back(&ctx); + + std::string ret; + render_internal(0, fragments_.size() - 1, stack, ret, 0); + return ret; + } + + private: + void parse() + { + std::string tag_open = "{{"; + std::string tag_close = "}}"; + + std::vector blockPositions; + + size_t current = 0; + while (1) + { + size_t idx = body_.find(tag_open, current); + if (idx == body_.npos) + { + fragments_.emplace_back(static_cast(current), static_cast(body_.size())); + actions_.emplace_back(ActionType::Ignore, 0, 0); + break; + } + fragments_.emplace_back(static_cast(current), static_cast(idx)); + + idx += tag_open.size(); + size_t endIdx = body_.find(tag_close, idx); + if (endIdx == idx) + { + throw invalid_template_exception("empty tag is not allowed"); + } + if (endIdx == body_.npos) + { + // error, no matching tag + throw invalid_template_exception("not matched opening tag"); + } + current = endIdx + tag_close.size(); + switch (body_[idx]) + { + case '#': + idx++; + while (body_[idx] == ' ') + idx++; + while (body_[endIdx - 1] == ' ') + endIdx--; + blockPositions.emplace_back(static_cast(actions_.size())); + actions_.emplace_back(ActionType::OpenBlock, idx, endIdx); + break; + case '/': + idx++; + while (body_[idx] == ' ') + idx++; + while (body_[endIdx - 1] == ' ') + endIdx--; + { + auto& matched = actions_[blockPositions.back()]; + if (body_.compare(idx, endIdx - idx, + body_, matched.start, matched.end - matched.start) != 0) + { + throw invalid_template_exception("not matched {{# {{/ pair: " + + body_.substr(matched.start, matched.end - matched.start) + ", " + + body_.substr(idx, endIdx - idx)); + } + matched.pos = actions_.size(); + } + actions_.emplace_back(ActionType::CloseBlock, idx, endIdx, blockPositions.back()); + blockPositions.pop_back(); + break; + case '^': + idx++; + while (body_[idx] == ' ') + idx++; + while (body_[endIdx - 1] == ' ') + endIdx--; + blockPositions.emplace_back(static_cast(actions_.size())); + actions_.emplace_back(ActionType::ElseBlock, idx, endIdx); + break; + case '!': + // do nothing action + actions_.emplace_back(ActionType::Ignore, idx + 1, endIdx); + break; + case '>': // partial + idx++; + while (body_[idx] == ' ') + idx++; + while (body_[endIdx - 1] == ' ') + endIdx--; + actions_.emplace_back(ActionType::Partial, idx, endIdx); + break; + case '{': + if (tag_open != "{{" || tag_close != "}}") + throw invalid_template_exception("cannot use triple mustache when delimiter changed"); + + idx++; + if (body_[endIdx + 2] != '}') + { + throw invalid_template_exception("{{{: }}} not matched"); + } + while (body_[idx] == ' ') + idx++; + while (body_[endIdx - 1] == ' ') + endIdx--; + actions_.emplace_back(ActionType::UnescapeTag, idx, endIdx); + current++; + break; + case '&': + idx++; + while (body_[idx] == ' ') + idx++; + while (body_[endIdx - 1] == ' ') + endIdx--; + actions_.emplace_back(ActionType::UnescapeTag, idx, endIdx); + break; + case '=': + // tag itself is no-op + idx++; + actions_.emplace_back(ActionType::Ignore, idx, endIdx); + endIdx--; + if (body_[endIdx] != '=') + throw invalid_template_exception("{{=: not matching = tag: " + body_.substr(idx, endIdx - idx)); + endIdx--; + while (body_[idx] == ' ') + idx++; + while (body_[endIdx] == ' ') + endIdx--; + endIdx++; + { + bool succeeded = false; + for (size_t i = idx; i < endIdx; i++) + { + if (body_[i] == ' ') + { + tag_open = body_.substr(idx, i - idx); + while (body_[i] == ' ') + i++; + tag_close = body_.substr(i, endIdx - i); + if (tag_open.empty()) + throw invalid_template_exception("{{=: empty open tag"); + if (tag_close.empty()) + throw invalid_template_exception("{{=: empty close tag"); + + if (tag_close.find(" ") != tag_close.npos) + throw invalid_template_exception("{{=: invalid open/close tag: " + tag_open + " " + tag_close); + succeeded = true; + break; + } + } + if (!succeeded) + throw invalid_template_exception("{{=: cannot find space between new open/close tags"); + } + break; + default: + // normal tag case; + while (body_[idx] == ' ') + idx++; + while (body_[endIdx - 1] == ' ') + endIdx--; + actions_.emplace_back(ActionType::Tag, idx, endIdx); + break; + } + } + + // removing standalones + for (int i = actions_.size() - 2; i >= 0; i--) + { + if (actions_[i].t == ActionType::Tag || actions_[i].t == ActionType::UnescapeTag) + continue; + auto& fragment_before = fragments_[i]; + auto& fragment_after = fragments_[i + 1]; + bool is_last_action = i == static_cast(actions_.size()) - 2; + bool all_space_before = true; + int j, k; + for (j = fragment_before.second - 1; j >= fragment_before.first; j--) + { + if (body_[j] != ' ') + { + all_space_before = false; + break; + } + } + if (all_space_before && i > 0) + continue; + if (!all_space_before && body_[j] != '\n') + continue; + bool all_space_after = true; + for (k = fragment_after.first; k < static_cast(body_.size()) && k < fragment_after.second; k++) + { + if (body_[k] != ' ') + { + all_space_after = false; + break; + } + } + if (all_space_after && !is_last_action) + continue; + if (!all_space_after && + !( + body_[k] == '\n' || + (body_[k] == '\r' && + k + 1 < static_cast(body_.size()) && + body_[k + 1] == '\n'))) + continue; + if (actions_[i].t == ActionType::Partial) + { + actions_[i].pos = fragment_before.second - j - 1; + } + fragment_before.second = j + 1; + if (!all_space_after) + { + if (body_[k] == '\n') + k++; + else + k += 2; + fragment_after.first = k; + } + } + } + + std::vector> fragments_; + std::vector actions_; + std::string body_; + }; + + inline template_t compile(const std::string& body) + { + return template_t(body); + } + namespace detail + { + inline std::string& get_template_base_directory_ref() + { + static std::string template_base_directory = "templates"; + return template_base_directory; + } + + /// A base directory not related to any blueprint + inline std::string& get_global_template_base_directory_ref() + { + static std::string template_base_directory = "templates"; + return template_base_directory; + } + } // namespace detail + + inline std::string default_loader(const std::string& filename) + { + std::string path = detail::get_template_base_directory_ref(); + std::ifstream inf(utility::join_path(path, filename)); + if (!inf) + { + CROW_LOG_WARNING << "Template \"" << filename << "\" not found."; + return {}; + } + return {std::istreambuf_iterator(inf), std::istreambuf_iterator()}; + } + + namespace detail + { + inline std::function& get_loader_ref() + { + static std::function loader = default_loader; + return loader; + } + } // namespace detail + + inline void set_base(const std::string& path) + { + auto& base = detail::get_template_base_directory_ref(); + base = path; + if (base.back() != '\\' && + base.back() != '/') + { + base += '/'; + } + } + + inline void set_global_base(const std::string& path) + { + auto& base = detail::get_global_template_base_directory_ref(); + base = path; + if (base.back() != '\\' && + base.back() != '/') + { + base += '/'; + } + } + + inline void set_loader(std::function loader) + { + detail::get_loader_ref() = std::move(loader); + } + + inline std::string load_text(const std::string& filename) + { + std::string filename_sanitized(filename); + utility::sanitize_filename(filename_sanitized); + return detail::get_loader_ref()(filename_sanitized); + } + + inline std::string load_text_unsafe(const std::string& filename) + { + return detail::get_loader_ref()(filename); + } + + inline template_t load(const std::string& filename) + { + std::string filename_sanitized(filename); + utility::sanitize_filename(filename_sanitized); + return compile(detail::get_loader_ref()(filename_sanitized)); + } + + inline template_t load_unsafe(const std::string& filename) + { + return compile(detail::get_loader_ref()(filename)); + } + } // namespace mustache +} // namespace crow diff --git a/src/lib/crow/parser.h b/src/lib/crow/parser.h new file mode 100644 index 0000000..7099e8c --- /dev/null +++ b/src/lib/crow/parser.h @@ -0,0 +1,200 @@ +#pragma once + +#include +#include +#include + +#include "crow/http_request.h" +#include "crow/http_parser_merged.h" + +namespace crow +{ + /// A wrapper for `nodejs/http-parser`. + + /// + /// Used to generate a \ref crow.request from the TCP socket buffer. + template + struct HTTPParser : public http_parser + { + static int on_message_begin(http_parser*) + { + return 0; + } + static int on_method(http_parser* self_) + { + HTTPParser* self = static_cast(self_); + self->req.method = static_cast(self->method); + + return 0; + } + static int on_url(http_parser* self_, const char* at, size_t length) + { + HTTPParser* self = static_cast(self_); + self->req.raw_url.insert(self->req.raw_url.end(), at, at + length); + self->req.url_params = query_string(self->req.raw_url); + self->req.url = self->req.raw_url.substr(0, self->qs_point != 0 ? self->qs_point : std::string::npos); + + self->process_url(); + + return 0; + } + static int on_header_field(http_parser* self_, const char* at, size_t length) + { + HTTPParser* self = static_cast(self_); + switch (self->header_building_state) + { + case 0: + if (!self->header_value.empty()) + { + self->req.headers.emplace(std::move(self->header_field), std::move(self->header_value)); + } + self->header_field.assign(at, at + length); + self->header_building_state = 1; + break; + case 1: + self->header_field.insert(self->header_field.end(), at, at + length); + break; + } + return 0; + } + static int on_header_value(http_parser* self_, const char* at, size_t length) + { + HTTPParser* self = static_cast(self_); + switch (self->header_building_state) + { + case 0: + self->header_value.insert(self->header_value.end(), at, at + length); + break; + case 1: + self->header_building_state = 0; + self->header_value.assign(at, at + length); + break; + } + return 0; + } + static int on_headers_complete(http_parser* self_) + { + HTTPParser* self = static_cast(self_); + if (!self->header_field.empty()) + { + self->req.headers.emplace(std::move(self->header_field), std::move(self->header_value)); + } + + self->set_connection_parameters(); + + self->process_header(); + return 0; + } + static int on_body(http_parser* self_, const char* at, size_t length) + { + HTTPParser* self = static_cast(self_); + self->req.body.insert(self->req.body.end(), at, at + length); + return 0; + } + static int on_message_complete(http_parser* self_) + { + HTTPParser* self = static_cast(self_); + + self->message_complete = true; + self->process_message(); + return 0; + } + HTTPParser(Handler* handler): + handler_(handler) + { + http_parser_init(this); + } + + // return false on error + /// Parse a buffer into the different sections of an HTTP request. + bool feed(const char* buffer, int length) + { + if (message_complete) + return true; + + const static http_parser_settings settings_{ + on_message_begin, + on_method, + on_url, + on_header_field, + on_header_value, + on_headers_complete, + on_body, + on_message_complete, + }; + + int nparsed = http_parser_execute(this, &settings_, buffer, length); + if (http_errno != CHPE_OK) + { + return false; + } + return nparsed == length; + } + + bool done() + { + return feed(nullptr, 0); + } + + void clear() + { + req = crow::request(); + header_field.clear(); + header_value.clear(); + header_building_state = 0; + qs_point = 0; + message_complete = false; + state = CROW_NEW_MESSAGE(); + } + + inline void process_url() + { + handler_->handle_url(); + } + + inline void process_header() + { + handler_->handle_header(); + } + + inline void process_message() + { + handler_->handle(); + } + + inline void set_connection_parameters() + { + req.http_ver_major = http_major; + req.http_ver_minor = http_minor; + + //NOTE(EDev): it seems that the problem is with crow's policy on closing the connection for HTTP_VERSION < 1.0, the behaviour for that in crow is "don't close the connection, but don't send a keep-alive either" + + // HTTP1.1 = always send keep_alive, HTTP1.0 = only send if header exists, HTTP?.? = never send + req.keep_alive = (http_major == 1 && http_minor == 0) ? + ((flags & F_CONNECTION_KEEP_ALIVE) ? true : false) : + ((http_major == 1 && http_minor == 1) ? true : false); + + // HTTP1.1 = only close if close header exists, HTTP1.0 = always close unless keep_alive header exists, HTTP?.?= never close + req.close_connection = (http_major == 1 && http_minor == 0) ? + ((flags & F_CONNECTION_KEEP_ALIVE) ? false : true) : + ((http_major == 1 && http_minor == 1) ? ((flags & F_CONNECTION_CLOSE) ? true : false) : false); + req.upgrade = static_cast(upgrade); + } + + /// The final request that this parser outputs. + /// + /// Data parsed is put directly into this object as soon as the related callback returns. (e.g. the request will have the cooorect method as soon as on_method() returns) + request req; + + private: + int header_building_state = 0; + bool message_complete = false; + std::string header_field; + std::string header_value; + + Handler* handler_; ///< This is currently an HTTP connection object (\ref crow.Connection). + }; +} // namespace crow + +#undef CROW_NEW_MESSAGE +#undef CROW_start_state diff --git a/src/lib/crow/query_string.h b/src/lib/crow/query_string.h new file mode 100644 index 0000000..66d380f --- /dev/null +++ b/src/lib/crow/query_string.h @@ -0,0 +1,489 @@ +#pragma once + +#include +#include +#include +#include +#include +#include +#include + +namespace crow +{ + +// ---------------------------------------------------------------------------- +// qs_parse (modified) +// https://github.com/bartgrantham/qs_parse +// ---------------------------------------------------------------------------- +/* Similar to strncmp, but handles URL-encoding for either string */ +int qs_strncmp(const char* s, const char* qs, size_t n); + + +/* Finds the beginning of each key/value pair and stores a pointer in qs_kv. + * Also decodes the value portion of the k/v pair *in-place*. In a future + * enhancement it will also have a compile-time option of sorting qs_kv + * alphabetically by key. */ +size_t qs_parse(char* qs, char* qs_kv[], size_t qs_kv_size, bool parse_url); + + +/* Used by qs_parse to decode the value portion of a k/v pair */ +int qs_decode(char * qs); + + +/* Looks up the value according to the key on a pre-processed query string + * A future enhancement will be a compile-time option to look up the key + * in a pre-sorted qs_kv array via a binary search. */ +//char * qs_k2v(const char * key, char * qs_kv[], int qs_kv_size); + char * qs_k2v(const char * key, char * const * qs_kv, size_t qs_kv_size, int nth); + + +/* Non-destructive lookup of value, based on key. User provides the + * destinaton string and length. */ +char * qs_scanvalue(const char * key, const char * qs, char * val, size_t val_len); + +// TODO: implement sorting of the qs_kv array; for now ensure it's not compiled +#undef _qsSORTING + +// isxdigit _is_ available in , but let's avoid another header instead +#define CROW_QS_ISHEX(x) ((((x)>='0'&&(x)<='9') || ((x)>='A'&&(x)<='F') || ((x)>='a'&&(x)<='f')) ? 1 : 0) +#define CROW_QS_HEX2DEC(x) (((x)>='0'&&(x)<='9') ? (x)-48 : ((x)>='A'&&(x)<='F') ? (x)-55 : ((x)>='a'&&(x)<='f') ? (x)-87 : 0) +#define CROW_QS_ISQSCHR(x) ((((x)=='=')||((x)=='#')||((x)=='&')||((x)=='\0')) ? 0 : 1) + +inline int qs_strncmp(const char * s, const char * qs, size_t n) +{ + unsigned char u1, u2, unyb, lnyb; + + while(n-- > 0) + { + u1 = static_cast(*s++); + u2 = static_cast(*qs++); + + if ( ! CROW_QS_ISQSCHR(u1) ) { u1 = '\0'; } + if ( ! CROW_QS_ISQSCHR(u2) ) { u2 = '\0'; } + + if ( u1 == '+' ) { u1 = ' '; } + if ( u1 == '%' ) // easier/safer than scanf + { + unyb = static_cast(*s++); + lnyb = static_cast(*s++); + if ( CROW_QS_ISHEX(unyb) && CROW_QS_ISHEX(lnyb) ) + u1 = (CROW_QS_HEX2DEC(unyb) * 16) + CROW_QS_HEX2DEC(lnyb); + else + u1 = '\0'; + } + + if ( u2 == '+' ) { u2 = ' '; } + if ( u2 == '%' ) // easier/safer than scanf + { + unyb = static_cast(*qs++); + lnyb = static_cast(*qs++); + if ( CROW_QS_ISHEX(unyb) && CROW_QS_ISHEX(lnyb) ) + u2 = (CROW_QS_HEX2DEC(unyb) * 16) + CROW_QS_HEX2DEC(lnyb); + else + u2 = '\0'; + } + + if ( u1 != u2 ) + return u1 - u2; + if ( u1 == '\0' ) + return 0; + } + if ( CROW_QS_ISQSCHR(*qs) ) + return -1; + else + return 0; +} + + +inline size_t qs_parse(char* qs, char* qs_kv[], size_t qs_kv_size, bool parse_url = true) +{ + size_t i, j; + char * substr_ptr; + + for(i=0; i means x iterations of this loop -> means *x+1* k/v pairs + substr_ptr += j + 1; + i++; + } + + // we only decode the values in place, the keys could have '='s in them + // which will hose our ability to distinguish keys from values later + for(j=0; j> qs_dict_name2kv(const char * dict_name, char * const * qs_kv, size_t qs_kv_size, int nth = 0) +{ + size_t i; + size_t name_len, skip_to_eq, skip_to_brace_open, skip_to_brace_close; + + name_len = strlen(dict_name); + +#ifdef _qsSORTING +// TODO: binary search for key in the sorted qs_kv +#else // _qsSORTING + for(i=0; i 0 && + skip_to_brace_close > 0 && + nth == 0 ) + { + auto key = std::string(qs_kv[i] + skip_to_brace_open, skip_to_brace_close - skip_to_brace_open); + auto value = std::string(qs_kv[i] + skip_to_eq); + return std::unique_ptr>(new std::pair(key, value)); + } + else + { + --nth; + } + } + } +#endif // _qsSORTING + + return nullptr; +} + + +inline char * qs_scanvalue(const char * key, const char * qs, char * val, size_t val_len) +{ + size_t i, key_len; + const char * tmp; + + // find the beginning of the k/v substrings + if ( (tmp = strchr(qs, '?')) != NULL ) + qs = tmp + 1; + + key_len = strlen(key); + while(qs[0] != '#' && qs[0] != '\0') + { + if ( qs_strncmp(key, qs, key_len) == 0 ) + break; + qs += strcspn(qs, "&") + 1; + } + + if ( qs[0] == '\0' ) return NULL; + + qs += strcspn(qs, "=&#"); + if ( qs[0] == '=' ) + { + qs++; + i = strcspn(qs, "&=#"); +#ifdef _MSC_VER + strncpy_s(val, val_len, qs, (val_len - 1)<(i + 1) ? (val_len - 1) : (i + 1)); +#else + strncpy(val, qs, (val_len - 1)<(i + 1) ? (val_len - 1) : (i + 1)); +#endif + qs_decode(val); + } + else + { + if ( val_len > 0 ) + val[0] = '\0'; + } + + return val; +} +} +// ---------------------------------------------------------------------------- + + +namespace crow +{ + struct request; + /// A class to represent any data coming after the `?` in the request URL into key-value pairs. + class query_string + { + public: + static const int MAX_KEY_VALUE_PAIRS_COUNT = 256; + + query_string() + { + } + + query_string(const query_string& qs): + url_(qs.url_) + { + for (auto p : qs.key_value_pairs_) + { + key_value_pairs_.push_back((char*)(p - qs.url_.c_str() + url_.c_str())); + } + } + + query_string& operator=(const query_string& qs) + { + url_ = qs.url_; + key_value_pairs_.clear(); + for (auto p : qs.key_value_pairs_) + { + key_value_pairs_.push_back((char*)(p - qs.url_.c_str() + url_.c_str())); + } + return *this; + } + + query_string& operator=(query_string&& qs) + { + key_value_pairs_ = std::move(qs.key_value_pairs_); + char* old_data = (char*)qs.url_.c_str(); + url_ = std::move(qs.url_); + for (auto& p : key_value_pairs_) + { + p += (char*)url_.c_str() - old_data; + } + return *this; + } + + + query_string(std::string params, bool url = true): + url_(std::move(params)) + { + if (url_.empty()) + return; + + key_value_pairs_.resize(MAX_KEY_VALUE_PAIRS_COUNT); + + size_t count = qs_parse(&url_[0], &key_value_pairs_[0], MAX_KEY_VALUE_PAIRS_COUNT, url); + key_value_pairs_.resize(count); + } + + void clear() + { + key_value_pairs_.clear(); + url_.clear(); + } + + friend std::ostream& operator<<(std::ostream& os, const query_string& qs) + { + os << "[ "; + for (size_t i = 0; i < qs.key_value_pairs_.size(); ++i) + { + if (i) + os << ", "; + os << qs.key_value_pairs_[i]; + } + os << " ]"; + return os; + } + + /// Get a value from a name, used for `?name=value`. + + /// + /// Note: this method returns the value of the first occurrence of the key only, to return all occurrences, see \ref get_list(). + char* get(const std::string& name) const + { + char* ret = qs_k2v(name.c_str(), key_value_pairs_.data(), key_value_pairs_.size()); + return ret; + } + + /// Works similar to \ref get() except it removes the item from the query string. + char* pop(const std::string& name) + { + char* ret = get(name); + if (ret != nullptr) + { + for (unsigned int i = 0; i < key_value_pairs_.size(); i++) + { + std::string str_item(key_value_pairs_[i]); + if (str_item.substr(0, name.size() + 1) == name + '=') + { + key_value_pairs_.erase(key_value_pairs_.begin() + i); + break; + } + } + } + return ret; + } + + /// Returns a list of values, passed as `?name[]=value1&name[]=value2&...name[]=valuen` with n being the size of the list. + + /// + /// Note: Square brackets in the above example are controlled by `use_brackets` boolean (true by default). If set to false, the example becomes `?name=value1,name=value2...name=valuen` + std::vector get_list(const std::string& name, bool use_brackets = true) const + { + std::vector ret; + std::string plus = name + (use_brackets ? "[]" : ""); + char* element = nullptr; + + int count = 0; + while (1) + { + element = qs_k2v(plus.c_str(), key_value_pairs_.data(), key_value_pairs_.size(), count++); + if (!element) + break; + ret.push_back(element); + } + return ret; + } + + /// Similar to \ref get_list() but it removes the + std::vector pop_list(const std::string& name, bool use_brackets = true) + { + std::vector ret = get_list(name, use_brackets); + if (!ret.empty()) + { + for (unsigned int i = 0; i < key_value_pairs_.size(); i++) + { + std::string str_item(key_value_pairs_[i]); + if ((use_brackets ? (str_item.substr(0, name.size() + 3) == name + "[]=") : (str_item.substr(0, name.size() + 1) == name + '='))) + { + key_value_pairs_.erase(key_value_pairs_.begin() + i--); + } + } + } + return ret; + } + + /// Works similar to \ref get_list() except the brackets are mandatory must not be empty. + + /// + /// For example calling `get_dict(yourname)` on `?yourname[sub1]=42&yourname[sub2]=84` would give a map containing `{sub1 : 42, sub2 : 84}`. + /// + /// if your query string has both empty brackets and ones with a key inside, use pop_list() to get all the values without a key before running this method. + std::unordered_map get_dict(const std::string& name) const + { + std::unordered_map ret; + + int count = 0; + while (1) + { + if (auto element = qs_dict_name2kv(name.c_str(), key_value_pairs_.data(), key_value_pairs_.size(), count++)) + ret.insert(*element); + else + break; + } + return ret; + } + + /// Works the same as \ref get_dict() but removes the values from the query string. + std::unordered_map pop_dict(const std::string& name) + { + std::unordered_map ret = get_dict(name); + if (!ret.empty()) + { + for (unsigned int i = 0; i < key_value_pairs_.size(); i++) + { + std::string str_item(key_value_pairs_[i]); + if (str_item.substr(0, name.size() + 1) == name + '[') + { + key_value_pairs_.erase(key_value_pairs_.begin() + i--); + } + } + } + return ret; + } + + std::vector keys() const + { + std::vector ret; + for (auto element : key_value_pairs_) + { + std::string str_element(element); + ret.emplace_back(str_element.substr(0, str_element.find('='))); + } + return ret; + } + + private: + std::string url_; + std::vector key_value_pairs_; + }; + +} // namespace crow diff --git a/src/lib/crow/returnable.h b/src/lib/crow/returnable.h new file mode 100644 index 0000000..25be335 --- /dev/null +++ b/src/lib/crow/returnable.h @@ -0,0 +1,19 @@ +#pragma once + +#include + +namespace crow +{ + /// An abstract class that allows any other class to be returned by a handler. + struct returnable + { + std::string content_type; + virtual std::string dump() const = 0; + + returnable(std::string ctype): + content_type{ctype} + {} + + virtual ~returnable(){}; + }; +} // namespace crow diff --git a/src/lib/crow/routing.h b/src/lib/crow/routing.h new file mode 100644 index 0000000..7998e49 --- /dev/null +++ b/src/lib/crow/routing.h @@ -0,0 +1,1776 @@ +#pragma once + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "crow/common.h" +#include "crow/http_response.h" +#include "crow/http_request.h" +#include "crow/utility.h" +#include "crow/logging.h" +#include "crow/websocket.h" +#include "crow/mustache.h" +#include "crow/middleware.h" + +namespace crow +{ + + constexpr const uint16_t INVALID_BP_ID{((uint16_t)-1)}; + + namespace detail + { + /// Typesafe wrapper for storing lists of middleware as their indices in the App + struct middleware_indices + { + template + void push() + {} + + template + void push() + { + using MwContainer = typename App::mw_container_t; + static_assert(black_magic::has_type::value, "Middleware must be present in app"); + static_assert(std::is_base_of::value, "Middleware must extend ILocalMiddleware"); + int idx = black_magic::tuple_index::value; + indices_.push_back(idx); + push(); + } + + void merge_front(const detail::middleware_indices& other) + { + indices_.insert(indices_.begin(), other.indices_.cbegin(), other.indices_.cend()); + } + + void merge_back(const detail::middleware_indices& other) + { + indices_.insert(indices_.end(), other.indices_.cbegin(), other.indices_.cend()); + } + + void pop_back(const detail::middleware_indices& other) + { + indices_.resize(indices_.size() - other.indices_.size()); + } + + bool empty() const + { + return indices_.empty(); + } + + // Sorts indices and filters out duplicates to allow fast lookups with traversal + void pack() + { + std::sort(indices_.begin(), indices_.end()); + indices_.erase(std::unique(indices_.begin(), indices_.end()), indices_.end()); + } + + const std::vector& indices() + { + return indices_; + } + + private: + std::vector indices_; + }; + } // namespace detail + + /// A base class for all rules. + + /// + /// Used to provide a common interface for code dealing with different types of rules.
+ /// A Rule provides a URL, allowed HTTP methods, and handlers. + class BaseRule + { + public: + BaseRule(std::string rule): + rule_(std::move(rule)) + {} + + virtual ~BaseRule() + {} + + virtual void validate() = 0; + std::unique_ptr upgrade() + { + if (rule_to_upgrade_) + return std::move(rule_to_upgrade_); + return {}; + } + + virtual void handle(request&, response&, const routing_params&) = 0; + virtual void handle_upgrade(const request&, response& res, SocketAdaptor&&) + { + res = response(404); + res.end(); + } +#ifdef CROW_ENABLE_SSL + virtual void handle_upgrade(const request&, response& res, SSLAdaptor&&) + { + res = response(404); + res.end(); + } +#endif + + uint32_t get_methods() + { + return methods_; + } + + template + void foreach_method(F f) + { + for (uint32_t method = 0, method_bit = 1; method < static_cast(HTTPMethod::InternalMethodCount); method++, method_bit <<= 1) + { + if (methods_ & method_bit) + f(method); + } + } + + std::string custom_templates_base; + + const std::string& rule() { return rule_; } + + protected: + uint32_t methods_{1 << static_cast(HTTPMethod::Get)}; + + std::string rule_; + std::string name_; + + std::unique_ptr rule_to_upgrade_; + + detail::middleware_indices mw_indices_; + + friend class Router; + friend class Blueprint; + template + friend struct RuleParameterTraits; + }; + + + namespace detail + { + namespace routing_handler_call_helper + { + template + struct call_pair + { + using type = T; + static const int pos = Pos; + }; + + template + struct call_params + { + H1& handler; + const routing_params& params; + request& req; + response& res; + }; + + template + struct call + {}; + + template + struct call, black_magic::S> + { + void operator()(F cparams) + { + using pushed = typename black_magic::S::template push_back>; + call, pushed>()(cparams); + } + }; + + template + struct call, black_magic::S> + { + void operator()(F cparams) + { + using pushed = typename black_magic::S::template push_back>; + call, pushed>()(cparams); + } + }; + + template + struct call, black_magic::S> + { + void operator()(F cparams) + { + using pushed = typename black_magic::S::template push_back>; + call, pushed>()(cparams); + } + }; + + template + struct call, black_magic::S> + { + void operator()(F cparams) + { + using pushed = typename black_magic::S::template push_back>; + call, pushed>()(cparams); + } + }; + + template + struct call, black_magic::S> + { + void operator()(F cparams) + { + cparams.handler( + cparams.req, + cparams.res, + cparams.params.template get(Args1::pos)...); + } + }; + + template + struct Wrapped + { + template + void set_(Func f, typename std::enable_if>::type, const request&>::value, int>::type = 0) + { + handler_ = ( +#ifdef CROW_CAN_USE_CPP14 + [f = std::move(f)] +#else + [f] +#endif + (const request&, response& res, Args... args) { + res = response(f(args...)); + res.end(); + }); + } + + template + struct req_handler_wrapper + { + req_handler_wrapper(Func f): + f(std::move(f)) + { + } + + void operator()(const request& req, response& res, Args... args) + { + res = response(f(req, args...)); + res.end(); + } + + Func f; + }; + + template + void set_(Func f, typename std::enable_if< + std::is_same>::type, const request&>::value && + !std::is_same>::type, response&>::value, + int>::type = 0) + { + handler_ = req_handler_wrapper(std::move(f)); + /*handler_ = ( + [f = std::move(f)] + (const request& req, response& res, Args... args){ + res = response(f(req, args...)); + res.end(); + });*/ + } + + template + void set_(Func f, typename std::enable_if< + std::is_same>::type, const request&>::value && + std::is_same>::type, response&>::value, + int>::type = 0) + { + handler_ = std::move(f); + } + + template + struct handler_type_helper + { + using type = std::function; + using args_type = black_magic::S...>; + }; + + template + struct handler_type_helper + { + using type = std::function; + using args_type = black_magic::S...>; + }; + + template + struct handler_type_helper + { + using type = std::function; + using args_type = black_magic::S...>; + }; + + typename handler_type_helper::type handler_; + + void operator()(request& req, response& res, const routing_params& params) + { + detail::routing_handler_call_helper::call< + detail::routing_handler_call_helper::call_params< + decltype(handler_)>, + 0, 0, 0, 0, + typename handler_type_helper::args_type, + black_magic::S<>>()( + detail::routing_handler_call_helper::call_params< + decltype(handler_)>{handler_, params, req, res}); + } + }; + + } // namespace routing_handler_call_helper + } // namespace detail + + + class CatchallRule + { + public: + /// @cond SKIP + CatchallRule() {} + + template + typename std::enable_if>::value, void>::type + operator()(Func&& f) + { + static_assert(!std::is_same::value, + "Handler function cannot have void return type; valid return types: string, int, crow::response, crow::returnable"); + + handler_ = ( +#ifdef CROW_CAN_USE_CPP14 + [f = std::move(f)] +#else + [f] +#endif + (const request&, response& res) { + res = response(f()); + res.end(); + }); + } + + template + typename std::enable_if< + !black_magic::CallHelper>::value && + black_magic::CallHelper>::value, + void>::type + operator()(Func&& f) + { + static_assert(!std::is_same()))>::value, + "Handler function cannot have void return type; valid return types: string, int, crow::response, crow::returnable"); + + handler_ = ( +#ifdef CROW_CAN_USE_CPP14 + [f = std::move(f)] +#else + [f] +#endif + (const crow::request& req, crow::response& res) { + res = response(f(req)); + res.end(); + }); + } + + template + typename std::enable_if< + !black_magic::CallHelper>::value && + !black_magic::CallHelper>::value && + black_magic::CallHelper>::value, + void>::type + operator()(Func&& f) + { + static_assert(std::is_same()))>::value, + "Handler function with response argument should have void return type"); + handler_ = ( +#ifdef CROW_CAN_USE_CPP14 + [f = std::move(f)] +#else + [f] +#endif + (const crow::request&, crow::response& res) { + f(res); + }); + } + + template + typename std::enable_if< + !black_magic::CallHelper>::value && + !black_magic::CallHelper>::value && + !black_magic::CallHelper>::value, + void>::type + operator()(Func&& f) + { + static_assert(std::is_same(), std::declval()))>::value, + "Handler function with response argument should have void return type"); + + handler_ = std::move(f); + } + /// @endcond + bool has_handler() + { + return (handler_ != nullptr); + } + + protected: + friend class Router; + + private: + std::function handler_; + }; + + + /// A rule dealing with websockets. + + /// + /// Provides the interface for the user to put in the necessary handlers for a websocket to work. + template + class WebSocketRule : public BaseRule + { + using self_t = WebSocketRule; + + public: + WebSocketRule(std::string rule, App* app): + BaseRule(std::move(rule)), + app_(app), + max_payload_(UINT64_MAX) + {} + + void validate() override + {} + + void handle(request&, response& res, const routing_params&) override + { + res = response(404); + res.end(); + } + + void handle_upgrade(const request& req, response&, SocketAdaptor&& adaptor) override + { + max_payload_ = max_payload_override_ ? max_payload_ : app_->websocket_max_payload(); + new crow::websocket::Connection(req, std::move(adaptor), app_, max_payload_, open_handler_, message_handler_, close_handler_, error_handler_, accept_handler_); + } +#ifdef CROW_ENABLE_SSL + void handle_upgrade(const request& req, response&, SSLAdaptor&& adaptor) override + { + new crow::websocket::Connection(req, std::move(adaptor), app_, max_payload_, open_handler_, message_handler_, close_handler_, error_handler_, accept_handler_); + } +#endif + + /// Override the global payload limit for this single WebSocket rule + self_t& max_payload(uint64_t max_payload) + { + max_payload_ = max_payload; + max_payload_override_ = true; + return *this; + } + + template + self_t& onopen(Func f) + { + open_handler_ = f; + return *this; + } + + template + self_t& onmessage(Func f) + { + message_handler_ = f; + return *this; + } + + template + self_t& onclose(Func f) + { + close_handler_ = f; + return *this; + } + + template + self_t& onerror(Func f) + { + error_handler_ = f; + return *this; + } + + template + self_t& onaccept(Func f) + { + accept_handler_ = f; + return *this; + } + + protected: + App* app_; + std::function open_handler_; + std::function message_handler_; + std::function close_handler_; + std::function error_handler_; + std::function accept_handler_; + uint64_t max_payload_; + bool max_payload_override_ = false; + }; + + /// Allows the user to assign parameters using functions. + + /// + /// `rule.name("name").methods(HTTPMethod::POST)` + template + struct RuleParameterTraits + { + using self_t = T; + + template + WebSocketRule& websocket(App* app) + { + auto p = new WebSocketRule(static_cast(this)->rule_, app); + static_cast(this)->rule_to_upgrade_.reset(p); + return *p; + } + + self_t& name(std::string name) noexcept + { + static_cast(this)->name_ = std::move(name); + return static_cast(*this); + } + + self_t& methods(HTTPMethod method) + { + static_cast(this)->methods_ = 1 << static_cast(method); + return static_cast(*this); + } + + template + self_t& methods(HTTPMethod method, MethodArgs... args_method) + { + methods(args_method...); + static_cast(this)->methods_ |= 1 << static_cast(method); + return static_cast(*this); + } + + /// Enable local middleware for this handler + template + self_t& middlewares() + { + static_cast(this)->mw_indices_.template push(); + return static_cast(*this); + } + }; + + /// A rule that can change its parameters during runtime. + class DynamicRule : public BaseRule, public RuleParameterTraits + { + public: + DynamicRule(std::string rule): + BaseRule(std::move(rule)) + {} + + void validate() override + { + if (!erased_handler_) + { + throw std::runtime_error(name_ + (!name_.empty() ? ": " : "") + "no handler for url " + rule_); + } + } + + void handle(request& req, response& res, const routing_params& params) override + { + if (!custom_templates_base.empty()) + mustache::set_base(custom_templates_base); + else if (mustache::detail::get_template_base_directory_ref() != "templates") + mustache::set_base("templates"); + erased_handler_(req, res, params); + } + + template + void operator()(Func f) + { +#ifdef CROW_MSVC_WORKAROUND + using function_t = utility::function_traits; +#else + using function_t = utility::function_traits; +#endif + erased_handler_ = wrap(std::move(f), black_magic::gen_seq()); + } + + // enable_if Arg1 == request && Arg2 == response + // enable_if Arg1 == request && Arg2 != resposne + // enable_if Arg1 != request +#ifdef CROW_MSVC_WORKAROUND + template +#else + template +#endif + std::function + wrap(Func f, black_magic::seq) + { +#ifdef CROW_MSVC_WORKAROUND + using function_t = utility::function_traits; +#else + using function_t = utility::function_traits; +#endif + if (!black_magic::is_parameter_tag_compatible( + black_magic::get_parameter_tag_runtime(rule_.c_str()), + black_magic::compute_parameter_tag_from_args_list< + typename function_t::template arg...>::value)) + { + throw std::runtime_error("route_dynamic: Handler type is mismatched with URL parameters: " + rule_); + } + auto ret = detail::routing_handler_call_helper::Wrapped...>(); + ret.template set_< + typename function_t::template arg...>(std::move(f)); + return ret; + } + + template + void operator()(std::string name, Func&& f) + { + name_ = std::move(name); + (*this).template operator()(std::forward(f)); + } + + private: + std::function erased_handler_; + }; + + /// Default rule created when CROW_ROUTE is called. + template + class TaggedRule : public BaseRule, public RuleParameterTraits> + { + public: + using self_t = TaggedRule; + + TaggedRule(std::string rule): + BaseRule(std::move(rule)) + {} + + void validate() override + { + if (rule_.at(0) != '/') + throw std::runtime_error("Internal error: Routes must start with a '/'"); + + if (!handler_) + { + throw std::runtime_error(name_ + (!name_.empty() ? ": " : "") + "no handler for url " + rule_); + } + } + + template + void operator()(Func&& f) + { + handler_ = ( +#ifdef CROW_CAN_USE_CPP14 + [f = std::move(f)] +#else + [f] +#endif + (crow::request& req, crow::response& res, Args... args) { + detail::wrapped_handler_call(req, res, f, std::forward(args)...); + }); + } + + template + void operator()(std::string name, Func&& f) + { + name_ = std::move(name); + (*this).template operator()(std::forward(f)); + } + + void handle(request& req, response& res, const routing_params& params) override + { + if (!custom_templates_base.empty()) + mustache::set_base(custom_templates_base); + else if (mustache::detail::get_template_base_directory_ref() != mustache::detail::get_global_template_base_directory_ref()) + mustache::set_base(mustache::detail::get_global_template_base_directory_ref()); + + detail::routing_handler_call_helper::call< + detail::routing_handler_call_helper::call_params, + 0, 0, 0, 0, + black_magic::S, + black_magic::S<>>()( + detail::routing_handler_call_helper::call_params{handler_, params, req, res}); + } + + private: + std::function handler_; + }; + + const int RULE_SPECIAL_REDIRECT_SLASH = 1; + + + /// A search tree. + class Trie + { + public: + struct Node + { + uint16_t rule_index{}; + // Assign the index to the maximum 32 unsigned integer value by default so that any other number (specifically 0) is a valid BP id. + uint16_t blueprint_index{INVALID_BP_ID}; + std::string key; + ParamType param = ParamType::MAX; // MAX = No param. + std::vector children; + + bool IsSimpleNode() const + { + return !rule_index && + blueprint_index == INVALID_BP_ID && + children.size() < 2 && + param == ParamType::MAX && + std::all_of(std::begin(children), std::end(children), [](const Node& x) { + return x.param == ParamType::MAX; + }); + } + + Node& add_child_node() + { + children.emplace_back(); + return children.back(); + } + }; + + + Trie() + {} + + /// Check whether or not the trie is empty. + bool is_empty() + { + return head_.children.empty(); + } + + void optimize() + { + for (auto& child : head_.children) + { + optimizeNode(child); + } + } + + + private: + void optimizeNode(Node& node) + { + if (node.children.empty()) + return; + if (node.IsSimpleNode()) + { + auto children_temp = std::move(node.children); + auto& child_temp = children_temp[0]; + node.key += child_temp.key; + node.rule_index = child_temp.rule_index; + node.blueprint_index = child_temp.blueprint_index; + node.children = std::move(child_temp.children); + optimizeNode(node); + } + else + { + for (auto& child : node.children) + { + optimizeNode(child); + } + } + } + + void debug_node_print(const Node& node, int level) + { + if (node.param != ParamType::MAX) + { + switch (node.param) + { + case ParamType::INT: + CROW_LOG_DEBUG << std::string(3 * level, ' ') << "└➝ " + << ""; + break; + case ParamType::UINT: + CROW_LOG_DEBUG << std::string(3 * level, ' ') << "└➝ " + << ""; + break; + case ParamType::DOUBLE: + CROW_LOG_DEBUG << std::string(3 * level, ' ') << "└➝ " + << ""; + break; + case ParamType::STRING: + CROW_LOG_DEBUG << std::string(3 * level, ' ') << "└➝ " + << ""; + break; + case ParamType::PATH: + CROW_LOG_DEBUG << std::string(3 * level, ' ') << "└➝ " + << ""; + break; + default: + CROW_LOG_DEBUG << std::string(3 * level, ' ') << "└➝ " + << ""; + break; + } + } + else + CROW_LOG_DEBUG << std::string(3 * level, ' ') << "└➝ " << node.key; + + for (const auto& child : node.children) + { + debug_node_print(child, level + 1); + } + } + + public: + void debug_print() + { + CROW_LOG_DEBUG << "└➙ ROOT"; + for (const auto& child : head_.children) + debug_node_print(child, 1); + } + + void validate() + { + if (!head_.IsSimpleNode()) + throw std::runtime_error("Internal error: Trie header should be simple!"); + optimize(); + } + + //Rule_index, Blueprint_index, routing_params + routing_handle_result find(const std::string& req_url, const Node& node, unsigned pos = 0, routing_params* params = nullptr, std::vector* blueprints = nullptr) const + { + //start params as an empty struct + routing_params empty; + if (params == nullptr) + params = ∅ + //same for blueprint vector + std::vector MT; + if (blueprints == nullptr) + blueprints = &MT; + + uint16_t found{}; //The rule index to be found + std::vector found_BP; //The Blueprint indices to be found + routing_params match_params; //supposedly the final matched parameters + + auto update_found = [&found, &found_BP, &match_params](routing_handle_result& ret) { + found_BP = std::move(ret.blueprint_indices); + if (ret.rule_index && (!found || found > ret.rule_index)) + { + found = ret.rule_index; + match_params = std::move(ret.r_params); + } + }; + + //if the function was called on a node at the end of the string (the last recursion), return the nodes rule index, and whatever params were passed to the function + if (pos == req_url.size()) + { + found_BP = std::move(*blueprints); + return routing_handle_result{node.rule_index, *blueprints, *params}; + } + + bool found_fragment = false; + + for (const auto& child : node.children) + { + if (child.param != ParamType::MAX) + { + if (child.param == ParamType::INT) + { + char c = req_url[pos]; + if ((c >= '0' && c <= '9') || c == '+' || c == '-') + { + char* eptr; + errno = 0; + long long int value = strtoll(req_url.data() + pos, &eptr, 10); + if (errno != ERANGE && eptr != req_url.data() + pos) + { + found_fragment = true; + params->int_params.push_back(value); + if (child.blueprint_index != INVALID_BP_ID) blueprints->push_back(child.blueprint_index); + auto ret = find(req_url, child, eptr - req_url.data(), params, blueprints); + update_found(ret); + params->int_params.pop_back(); + if (!blueprints->empty()) blueprints->pop_back(); + } + } + } + + else if (child.param == ParamType::UINT) + { + char c = req_url[pos]; + if ((c >= '0' && c <= '9') || c == '+') + { + char* eptr; + errno = 0; + unsigned long long int value = strtoull(req_url.data() + pos, &eptr, 10); + if (errno != ERANGE && eptr != req_url.data() + pos) + { + found_fragment = true; + params->uint_params.push_back(value); + if (child.blueprint_index != INVALID_BP_ID) blueprints->push_back(child.blueprint_index); + auto ret = find(req_url, child, eptr - req_url.data(), params, blueprints); + update_found(ret); + params->uint_params.pop_back(); + if (!blueprints->empty()) blueprints->pop_back(); + } + } + } + + else if (child.param == ParamType::DOUBLE) + { + char c = req_url[pos]; + if ((c >= '0' && c <= '9') || c == '+' || c == '-' || c == '.') + { + char* eptr; + errno = 0; + double value = strtod(req_url.data() + pos, &eptr); + if (errno != ERANGE && eptr != req_url.data() + pos) + { + found_fragment = true; + params->double_params.push_back(value); + if (child.blueprint_index != INVALID_BP_ID) blueprints->push_back(child.blueprint_index); + auto ret = find(req_url, child, eptr - req_url.data(), params, blueprints); + update_found(ret); + params->double_params.pop_back(); + if (!blueprints->empty()) blueprints->pop_back(); + } + } + } + + else if (child.param == ParamType::STRING) + { + size_t epos = pos; + for (; epos < req_url.size(); epos++) + { + if (req_url[epos] == '/') + break; + } + + if (epos != pos) + { + found_fragment = true; + params->string_params.push_back(req_url.substr(pos, epos - pos)); + if (child.blueprint_index != INVALID_BP_ID) blueprints->push_back(child.blueprint_index); + auto ret = find(req_url, child, epos, params, blueprints); + update_found(ret); + params->string_params.pop_back(); + if (!blueprints->empty()) blueprints->pop_back(); + } + } + + else if (child.param == ParamType::PATH) + { + size_t epos = req_url.size(); + + if (epos != pos) + { + found_fragment = true; + params->string_params.push_back(req_url.substr(pos, epos - pos)); + if (child.blueprint_index != INVALID_BP_ID) blueprints->push_back(child.blueprint_index); + auto ret = find(req_url, child, epos, params, blueprints); + update_found(ret); + params->string_params.pop_back(); + if (!blueprints->empty()) blueprints->pop_back(); + } + } + } + + else + { + const std::string& fragment = child.key; + if (req_url.compare(pos, fragment.size(), fragment) == 0) + { + found_fragment = true; + if (child.blueprint_index != INVALID_BP_ID) blueprints->push_back(child.blueprint_index); + auto ret = find(req_url, child, pos + fragment.size(), params, blueprints); + update_found(ret); + if (!blueprints->empty()) blueprints->pop_back(); + } + } + } + + if (!found_fragment) + found_BP = std::move(*blueprints); + + return routing_handle_result{found, found_BP, match_params}; //Called after all the recursions have been done + } + + routing_handle_result find(const std::string& req_url) const + { + return find(req_url, head_); + } + + //This functions assumes any blueprint info passed is valid + void add(const std::string& url, uint16_t rule_index, unsigned bp_prefix_length = 0, uint16_t blueprint_index = INVALID_BP_ID) + { + auto idx = &head_; + + bool has_blueprint = bp_prefix_length != 0 && blueprint_index != INVALID_BP_ID; + + for (unsigned i = 0; i < url.size(); i++) + { + char c = url[i]; + if (c == '<') + { + static struct ParamTraits + { + ParamType type; + std::string name; + } paramTraits[] = + { + {ParamType::INT, ""}, + {ParamType::UINT, ""}, + {ParamType::DOUBLE, ""}, + {ParamType::DOUBLE, ""}, + {ParamType::STRING, ""}, + {ParamType::STRING, ""}, + {ParamType::PATH, ""}, + }; + + for (const auto& x : paramTraits) + { + if (url.compare(i, x.name.size(), x.name) == 0) + { + bool found = false; + for (auto& child : idx->children) + { + if (child.param == x.type) + { + idx = &child; + i += x.name.size(); + found = true; + break; + } + } + if (found) + break; + + auto new_node_idx = &idx->add_child_node(); + new_node_idx->param = x.type; + idx = new_node_idx; + i += x.name.size(); + break; + } + } + + i--; + } + else + { + //This part assumes the tree is unoptimized (every node has a max 1 character key) + bool piece_found = false; + for (auto& child : idx->children) + { + if (child.key[0] == c) + { + idx = &child; + piece_found = true; + break; + } + } + if (!piece_found) + { + auto new_node_idx = &idx->add_child_node(); + new_node_idx->key = c; + //The assumption here is that you'd only need to add a blueprint index if the tree didn't have the BP prefix. + if (has_blueprint && i == bp_prefix_length) + new_node_idx->blueprint_index = blueprint_index; + idx = new_node_idx; + } + } + } + + //check if the last node already has a value (exact url already in Trie) + if (idx->rule_index) + throw std::runtime_error("handler already exists for " + url); + idx->rule_index = rule_index; + } + + private: + Node head_; + }; + + /// A blueprint can be considered a smaller section of a Crow app, specifically where the router is conecerned. + + /// + /// You can use blueprints to assign a common prefix to rules' prefix, set custom static and template folders, and set a custom catchall route. + /// You can also assign nest blueprints for maximum Compartmentalization. + class Blueprint + { + public: + Blueprint(const std::string& prefix): + prefix_(prefix){}; + + Blueprint(const std::string& prefix, const std::string& static_dir): + prefix_(prefix), static_dir_(static_dir){}; + + Blueprint(const std::string& prefix, const std::string& static_dir, const std::string& templates_dir): + prefix_(prefix), static_dir_(static_dir), templates_dir_(templates_dir){}; + + /* + Blueprint(Blueprint& other) + { + prefix_ = std::move(other.prefix_); + all_rules_ = std::move(other.all_rules_); + } + + Blueprint(const Blueprint& other) + { + prefix_ = other.prefix_; + all_rules_ = other.all_rules_; + } +*/ + Blueprint(Blueprint&& value) + { + *this = std::move(value); + } + + Blueprint& operator=(const Blueprint& value) = delete; + + Blueprint& operator=(Blueprint&& value) noexcept + { + prefix_ = std::move(value.prefix_); + static_dir_ = std::move(value.static_dir_); + templates_dir_ = std::move(value.templates_dir_); + all_rules_ = std::move(value.all_rules_); + catchall_rule_ = std::move(value.catchall_rule_); + blueprints_ = std::move(value.blueprints_); + mw_indices_ = std::move(value.mw_indices_); + return *this; + } + + bool operator==(const Blueprint& value) + { + return value.prefix() == prefix_; + } + + bool operator!=(const Blueprint& value) + { + return value.prefix() != prefix_; + } + + std::string prefix() const + { + return prefix_; + } + + std::string static_dir() const + { + return static_dir_; + } + + DynamicRule& new_rule_dynamic(std::string&& rule) + { + std::string new_rule = std::move(rule); + new_rule = '/' + prefix_ + new_rule; + auto ruleObject = new DynamicRule(new_rule); + ruleObject->custom_templates_base = templates_dir_; + all_rules_.emplace_back(ruleObject); + + return *ruleObject; + } + + template + typename black_magic::arguments::type::template rebind& new_rule_tagged(std::string&& rule) + { + std::string new_rule = std::move(rule); + new_rule = '/' + prefix_ + new_rule; + using RuleT = typename black_magic::arguments::type::template rebind; + + auto ruleObject = new RuleT(new_rule); + ruleObject->custom_templates_base = templates_dir_; + all_rules_.emplace_back(ruleObject); + + return *ruleObject; + } + + void register_blueprint(Blueprint& blueprint) + { + if (blueprints_.empty() || std::find(blueprints_.begin(), blueprints_.end(), &blueprint) == blueprints_.end()) + { + apply_blueprint(blueprint); + blueprints_.emplace_back(&blueprint); + } + else + throw std::runtime_error("blueprint \"" + blueprint.prefix_ + "\" already exists in blueprint \"" + prefix_ + '\"'); + } + + + CatchallRule& catchall_rule() + { + return catchall_rule_; + } + + template + void middlewares() + { + mw_indices_.push(); + } + + private: + void apply_blueprint(Blueprint& blueprint) + { + + blueprint.prefix_ = prefix_ + '/' + blueprint.prefix_; + blueprint.static_dir_ = static_dir_ + '/' + blueprint.static_dir_; + blueprint.templates_dir_ = templates_dir_ + '/' + blueprint.templates_dir_; + for (auto& rule : blueprint.all_rules_) + { + std::string new_rule = '/' + prefix_ + rule->rule_; + rule->rule_ = new_rule; + } + for (Blueprint* bp_child : blueprint.blueprints_) + { + Blueprint& bp_ref = *bp_child; + apply_blueprint(bp_ref); + } + } + + std::string prefix_; + std::string static_dir_; + std::string templates_dir_; + std::vector> all_rules_; + CatchallRule catchall_rule_; + std::vector blueprints_; + detail::middleware_indices mw_indices_; + + friend class Router; + }; + + /// Handles matching requests to existing rules and upgrade requests. + class Router + { + public: + Router() + {} + + DynamicRule& new_rule_dynamic(const std::string& rule) + { + auto ruleObject = new DynamicRule(rule); + all_rules_.emplace_back(ruleObject); + + return *ruleObject; + } + + template + typename black_magic::arguments::type::template rebind& new_rule_tagged(const std::string& rule) + { + using RuleT = typename black_magic::arguments::type::template rebind; + + auto ruleObject = new RuleT(rule); + all_rules_.emplace_back(ruleObject); + + return *ruleObject; + } + + CatchallRule& catchall_rule() + { + return catchall_rule_; + } + + void internal_add_rule_object(const std::string& rule, BaseRule* ruleObject, const uint16_t& BP_index, std::vector& blueprints) + { + bool has_trailing_slash = false; + std::string rule_without_trailing_slash; + if (rule.size() > 1 && rule.back() == '/') + { + has_trailing_slash = true; + rule_without_trailing_slash = rule; + rule_without_trailing_slash.pop_back(); + } + + ruleObject->mw_indices_.pack(); + + ruleObject->foreach_method([&](int method) { + per_methods_[method].rules.emplace_back(ruleObject); + per_methods_[method].trie.add(rule, per_methods_[method].rules.size() - 1, BP_index != INVALID_BP_ID ? blueprints[BP_index]->prefix().length() : 0, BP_index); + + // directory case: + // request to '/about' url matches '/about/' rule + if (has_trailing_slash) + { + per_methods_[method].trie.add(rule_without_trailing_slash, RULE_SPECIAL_REDIRECT_SLASH, BP_index != INVALID_BP_ID ? blueprints[BP_index]->prefix().length() : 0, BP_index); + } + }); + } + + void register_blueprint(Blueprint& blueprint) + { + if (std::find(blueprints_.begin(), blueprints_.end(), &blueprint) == blueprints_.end()) + { + blueprints_.emplace_back(&blueprint); + } + else + throw std::runtime_error("blueprint \"" + blueprint.prefix_ + "\" already exists in router"); + } + + void get_recursive_child_methods(Blueprint* blueprint, std::vector& methods) + { + //we only need to deal with children if the blueprint has absolutely no methods (meaning its index won't be added to the trie) + if (blueprint->static_dir_.empty() && blueprint->all_rules_.empty()) + { + for (Blueprint* bp : blueprint->blueprints_) + { + get_recursive_child_methods(bp, methods); + } + } + else if (!blueprint->static_dir_.empty()) + methods.emplace_back(HTTPMethod::Get); + for (auto& rule : blueprint->all_rules_) + { + rule->foreach_method([&methods](unsigned method) { + HTTPMethod method_final = static_cast(method); + if (std::find(methods.begin(), methods.end(), method_final) == methods.end()) + methods.emplace_back(method_final); + }); + } + } + + void validate_bp(std::vector blueprints, detail::middleware_indices& current_mw) + { + for (unsigned i = 0; i < blueprints.size(); i++) + { + Blueprint* blueprint = blueprints[i]; + if (blueprint->static_dir_ == "" && blueprint->all_rules_.empty()) + { + std::vector methods; + get_recursive_child_methods(blueprint, methods); + for (HTTPMethod x : methods) + { + int i = static_cast(x); + per_methods_[i].trie.add(blueprint->prefix(), 0, blueprint->prefix().length(), i); + } + } + + current_mw.merge_back(blueprint->mw_indices_); + for (auto& rule : blueprint->all_rules_) + { + if (rule) + { + auto upgraded = rule->upgrade(); + if (upgraded) + rule = std::move(upgraded); + rule->validate(); + rule->mw_indices_.merge_front(current_mw); + internal_add_rule_object(rule->rule(), rule.get(), i, blueprints); + } + } + validate_bp(blueprint->blueprints_, current_mw); + current_mw.pop_back(blueprint->mw_indices_); + } + } + + void validate() + { + //Take all the routes from the registered blueprints and add them to `all_rules_` to be processed. + detail::middleware_indices blueprint_mw; + validate_bp(blueprints_, blueprint_mw); + + for (auto& rule : all_rules_) + { + if (rule) + { + auto upgraded = rule->upgrade(); + if (upgraded) + rule = std::move(upgraded); + rule->validate(); + internal_add_rule_object(rule->rule(), rule.get(), INVALID_BP_ID, blueprints_); + } + } + for (auto& per_method : per_methods_) + { + per_method.trie.validate(); + } + } + + // TODO maybe add actual_method + template + void handle_upgrade(const request& req, response& res, Adaptor&& adaptor) + { + if (req.method >= HTTPMethod::InternalMethodCount) + return; + + auto& per_method = per_methods_[static_cast(req.method)]; + auto& rules = per_method.rules; + unsigned rule_index = per_method.trie.find(req.url).rule_index; + + if (!rule_index) + { + for (auto& per_method : per_methods_) + { + if (per_method.trie.find(req.url).rule_index) + { + CROW_LOG_DEBUG << "Cannot match method " << req.url << " " << method_name(req.method); + res = response(405); + res.end(); + return; + } + } + + CROW_LOG_INFO << "Cannot match rules " << req.url; + res = response(404); + res.end(); + return; + } + + if (rule_index >= rules.size()) + throw std::runtime_error("Trie internal structure corrupted!"); + + if (rule_index == RULE_SPECIAL_REDIRECT_SLASH) + { + CROW_LOG_INFO << "Redirecting to a url with trailing slash: " << req.url; + res = response(301); + + // TODO(ipkn) absolute url building + if (req.get_header_value("Host").empty()) + { + res.add_header("Location", req.url + "/"); + } + else + { + res.add_header("Location", "http://" + req.get_header_value("Host") + req.url + "/"); + } + res.end(); + return; + } + + CROW_LOG_DEBUG << "Matched rule (upgrade) '" << rules[rule_index]->rule_ << "' " << static_cast(req.method) << " / " << rules[rule_index]->get_methods(); + + // any uncaught exceptions become 500s + try + { + rules[rule_index]->handle_upgrade(req, res, std::move(adaptor)); + } + catch (std::exception& e) + { + CROW_LOG_ERROR << "An uncaught exception occurred: " << e.what(); + res = response(500); + res.end(); + return; + } + catch (...) + { + CROW_LOG_ERROR << "An uncaught exception occurred. The type was unknown so no information was available."; + res = response(500); + res.end(); + return; + } + } + + void get_found_bp(std::vector& bp_i, std::vector& blueprints, std::vector& found_bps, uint16_t index = 0) + { + // This statement makes 3 assertions: + // 1. The index is above 0. + // 2. The index does not lie outside the given blueprint list. + // 3. The next blueprint we're adding has a prefix that starts the same as the already added blueprint + a slash (the rest is irrelevant). + // + // This is done to prevent a blueprint that has a prefix of "bp_prefix2" to be assumed as a child of one that has "bp_prefix". + // + // If any of the assertions is untrue, we delete the last item added, and continue using the blueprint list of the blueprint found before, the topmost being the router's list + auto verify_prefix = [&bp_i, &index, &blueprints, &found_bps]() { + return index > 0 && + bp_i[index] < blueprints.size() && + blueprints[bp_i[index]]->prefix().substr(0, found_bps[index - 1]->prefix().length() + 1).compare(std::string(found_bps[index - 1]->prefix() + '/')) == 0; + }; + if (index < bp_i.size()) + { + + if (verify_prefix()) + { + found_bps.push_back(blueprints[bp_i[index]]); + get_found_bp(bp_i, found_bps.back()->blueprints_, found_bps, ++index); + } + else + { + if (found_bps.size() < 2) + { + found_bps.clear(); + found_bps.push_back(blueprints_[bp_i[index]]); + } + else + { + found_bps.pop_back(); + Blueprint* last_element = found_bps.back(); + found_bps.push_back(last_element->blueprints_[bp_i[index]]); + } + get_found_bp(bp_i, found_bps.back()->blueprints_, found_bps, ++index); + } + } + } + + /// Is used to handle errors, you insert the error code, found route, request, and response. and it'll either call the appropriate catchall route (considering the blueprint system) and send you a status string (which is mainly used for debug messages), or just set the response code to the proper error code. + std::string get_error(unsigned short code, routing_handle_result& found, const request& req, response& res) + { + res.code = code; + std::vector bps_found; + get_found_bp(found.blueprint_indices, blueprints_, bps_found); + for (int i = bps_found.size() - 1; i > 0; i--) + { + std::vector bpi = found.blueprint_indices; + if (bps_found[i]->catchall_rule().has_handler()) + { + bps_found[i]->catchall_rule().handler_(req, res); +#ifdef CROW_ENABLE_DEBUG + return std::string("Redirected to Blueprint \"" + bps_found[i]->prefix() + "\" Catchall rule"); +#else + return std::string(); +#endif + } + } + if (catchall_rule_.has_handler()) + { + catchall_rule_.handler_(req, res); +#ifdef CROW_ENABLE_DEBUG + return std::string("Redirected to global Catchall rule"); +#else + return std::string(); +#endif + } + return std::string(); + } + + std::unique_ptr handle_initial(request& req, response& res) + { + HTTPMethod method_actual = req.method; + + std::unique_ptr found{ + new routing_handle_result( + 0, + std::vector(), + routing_params(), + HTTPMethod::InternalMethodCount)}; // This is always returned to avoid a null pointer dereference. + + // NOTE(EDev): This most likely will never run since the parser should handle this situation and close the connection before it gets here. + if (CROW_UNLIKELY(req.method >= HTTPMethod::InternalMethodCount)) + return found; + else if (req.method == HTTPMethod::Head) + { + *found = per_methods_[static_cast(method_actual)].trie.find(req.url); + // support HEAD requests using GET if not defined as method for the requested URL + if (!found->rule_index) + { + method_actual = HTTPMethod::Get; + *found = per_methods_[static_cast(method_actual)].trie.find(req.url); + if (!found->rule_index) // If a route is still not found, return a 404 without executing the rest of the HEAD specific code. + { + CROW_LOG_DEBUG << "Cannot match rules " << req.url; + res = response(404); //TODO(EDev): Should this redirect to catchall? + res.end(); + return found; + } + } + + res.skip_body = true; + found->method = method_actual; + return found; + } + else if (req.method == HTTPMethod::Options) + { + std::string allow = "OPTIONS, HEAD, "; + + if (req.url == "/*") + { + for (int i = 0; i < static_cast(HTTPMethod::InternalMethodCount); i++) + { + if (static_cast(HTTPMethod::Head) == i) + continue; // HEAD is always allowed + + if (!per_methods_[i].trie.is_empty()) + { + allow += method_name(static_cast(i)) + ", "; + } + } + allow = allow.substr(0, allow.size() - 2); + res = response(204); + res.set_header("Allow", allow); + res.end(); + found->method = method_actual; + return found; + } + else + { + bool rules_matched = false; + for (int i = 0; i < static_cast(HTTPMethod::InternalMethodCount); i++) + { + if (per_methods_[i].trie.find(req.url).rule_index) + { + rules_matched = true; + + if (static_cast(HTTPMethod::Head) == i) + continue; // HEAD is always allowed + + allow += method_name(static_cast(i)) + ", "; + } + } + if (rules_matched) + { + allow = allow.substr(0, allow.size() - 2); + res = response(204); + res.set_header("Allow", allow); + res.end(); + found->method = method_actual; + return found; + } + else + { + CROW_LOG_DEBUG << "Cannot match rules " << req.url; + res = response(404); //TODO(EDev): Should this redirect to catchall? + res.end(); + return found; + } + } + } + else // Every request that isn't a HEAD or OPTIONS request + { + *found = per_methods_[static_cast(method_actual)].trie.find(req.url); + // TODO(EDev): maybe ending the else here would allow the requests coming from above (after removing the return statement) to be checked on whether they actually point to a route + if (!found->rule_index) + { + for (auto& per_method : per_methods_) + { + if (per_method.trie.find(req.url).rule_index) //Route found, but in another method + { + const std::string error_message(get_error(405, *found, req, res)); + CROW_LOG_DEBUG << "Cannot match method " << req.url << " " << method_name(method_actual) << ". " << error_message; + res.end(); + return found; + } + } + //Route does not exist anywhere + + const std::string error_message(get_error(404, *found, req, res)); + CROW_LOG_DEBUG << "Cannot match rules " << req.url << ". " << error_message; + res.end(); + return found; + } + + found->method = method_actual; + return found; + } + } + + template + void handle(request& req, response& res, routing_handle_result found) + { + HTTPMethod method_actual = found.method; + auto& rules = per_methods_[static_cast(method_actual)].rules; + unsigned rule_index = found.rule_index; + + if (rule_index >= rules.size()) + throw std::runtime_error("Trie internal structure corrupted!"); + + if (rule_index == RULE_SPECIAL_REDIRECT_SLASH) + { + CROW_LOG_INFO << "Redirecting to a url with trailing slash: " << req.url; + res = response(301); + + // TODO(ipkn) absolute url building + if (req.get_header_value("Host").empty()) + { + res.add_header("Location", req.url + "/"); + } + else + { + res.add_header("Location", "http://" + req.get_header_value("Host") + req.url + "/"); + } + res.end(); + return; + } + + CROW_LOG_DEBUG << "Matched rule '" << rules[rule_index]->rule_ << "' " << static_cast(req.method) << " / " << rules[rule_index]->get_methods(); + + // any uncaught exceptions become 500s + try + { + auto& rule = rules[rule_index]; + handle_rule(rule, req, res, found.r_params); + } + catch (std::exception& e) + { + CROW_LOG_ERROR << "An uncaught exception occurred: " << e.what(); + res = response(500); + res.end(); + return; + } + catch (...) + { + CROW_LOG_ERROR << "An uncaught exception occurred. The type was unknown so no information was available."; + res = response(500); + res.end(); + return; + } + } + + template + typename std::enable_if::value != 0, void>::type + handle_rule(BaseRule* rule, crow::request& req, crow::response& res, const crow::routing_params& rp) + { + if (!rule->mw_indices_.empty()) + { + auto& ctx = *reinterpret_cast(req.middleware_context); + auto& container = *reinterpret_cast(req.middleware_container); + detail::middleware_call_criteria_dynamic crit_fwd(rule->mw_indices_.indices()); + + auto glob_completion_handler = std::move(res.complete_request_handler_); + res.complete_request_handler_ = [] {}; + + detail::middleware_call_helper(crit_fwd, container, req, res, ctx); + + if (res.completed_) + { + glob_completion_handler(); + return; + } + + res.complete_request_handler_ = [&rule, &ctx, &container, &req, &res, glob_completion_handler] { + detail::middleware_call_criteria_dynamic crit_bwd(rule->mw_indices_.indices()); + + detail::after_handlers_call_helper< + decltype(crit_bwd), + std::tuple_size::value - 1, + typename App::context_t, + typename App::mw_container_t>(crit_bwd, container, ctx, req, res); + glob_completion_handler(); + }; + } + rule->handle(req, res, rp); + } + + template + typename std::enable_if::value == 0, void>::type + handle_rule(BaseRule* rule, crow::request& req, crow::response& res, const crow::routing_params& rp) + { + rule->handle(req, res, rp); + } + + void debug_print() + { + for (int i = 0; i < static_cast(HTTPMethod::InternalMethodCount); i++) + { + Trie& trie_ = per_methods_[i].trie; + if (!trie_.is_empty()) + { + CROW_LOG_DEBUG << method_name(static_cast(i)); + trie_.debug_print(); + } + } + } + + std::vector& blueprints() + { + return blueprints_; + } + + private: + CatchallRule catchall_rule_; + + struct PerMethod + { + std::vector rules; + Trie trie; + + // rule index 0, 1 has special meaning; preallocate it to avoid duplication. + PerMethod(): + rules(2) {} + }; + std::array(HTTPMethod::InternalMethodCount)> per_methods_; + std::vector> all_rules_; + std::vector blueprints_; + }; +} // namespace crow diff --git a/src/lib/crow/settings.h b/src/lib/crow/settings.h new file mode 100644 index 0000000..4007e67 --- /dev/null +++ b/src/lib/crow/settings.h @@ -0,0 +1,67 @@ +#pragma once +// settings for crow +// TODO(ipkn) replace with runtime config. libucl? + +/* #ifdef - enables debug mode */ +//#define CROW_ENABLE_DEBUG + +/* #ifdef - enables logging */ +#define CROW_ENABLE_LOGGING + +/* #ifdef - enforces section 5.2 and 6.1 of RFC6455 (only accepting masked messages from clients) */ +//#define CROW_ENFORCE_WS_SPEC + +/* #define - specifies log level */ +/* + Debug = 0 + Info = 1 + Warning = 2 + Error = 3 + Critical = 4 + + default to INFO +*/ +#ifndef CROW_LOG_LEVEL +#define CROW_LOG_LEVEL 1 +#endif + +#ifndef CROW_STATIC_DIRECTORY +#define CROW_STATIC_DIRECTORY "static/" +#endif +#ifndef CROW_STATIC_ENDPOINT +#define CROW_STATIC_ENDPOINT "/static/" +#endif + +// compiler flags +#if defined(_MSVC_LANG) && _MSVC_LANG >= 201402L +#define CROW_CAN_USE_CPP14 +#endif +#if __cplusplus >= 201402L +#define CROW_CAN_USE_CPP14 +#endif + +#if defined(_MSVC_LANG) && _MSVC_LANG >= 201703L +#define CROW_CAN_USE_CPP17 +#endif +#if __cplusplus >= 201703L +#define CROW_CAN_USE_CPP17 +#if defined(__GNUC__) && __GNUC__ < 8 +#define CROW_FILESYSTEM_IS_EXPERIMENTAL +#endif +#endif + +#if defined(_MSC_VER) +#if _MSC_VER < 1900 +#define CROW_MSVC_WORKAROUND +#define constexpr const +#define noexcept throw() +#endif +#endif + +#if defined(__GNUC__) && __GNUC__ == 8 && __GNUC_MINOR__ < 4 +#if __cplusplus > 201103L +#define CROW_GCC83_WORKAROUND +#else +#error "GCC 8.1 - 8.3 has a bug that prevents Crow from compiling with C++11. Please update GCC to > 8.3 or use C++ > 11." +#endif +#endif diff --git a/src/lib/crow/socket_adaptors.h b/src/lib/crow/socket_adaptors.h new file mode 100644 index 0000000..478840e --- /dev/null +++ b/src/lib/crow/socket_adaptors.h @@ -0,0 +1,171 @@ +#pragma once +#ifndef ASIO_STANDALONE +#define ASIO_STANDALONE +#endif +#include +#ifdef CROW_ENABLE_SSL +#include +#endif +#include "crow/settings.h" +#include +#if ASIO_VERSION >= 101300 // 1.13.0 +#define GET_IO_SERVICE(s) ((asio::io_context&)(s).get_executor().context()) +#else +#define GET_IO_SERVICE(s) ((s).get_io_service()) +#endif +namespace crow +{ + using tcp = asio::ip::tcp; + + /// A wrapper for the asio::ip::tcp::socket and asio::ssl::stream + struct SocketAdaptor + { + using context = void; + SocketAdaptor(asio::io_service& io_service, context*): + socket_(io_service) + {} + + asio::io_service& get_io_service() + { + return GET_IO_SERVICE(socket_); + } + + /// Get the TCP socket handling data trasfers, regardless of what layer is handling transfers on top of the socket. + tcp::socket& raw_socket() + { + return socket_; + } + + /// Get the object handling data transfers, this can be either a TCP socket or an SSL stream (if SSL is enabled). + tcp::socket& socket() + { + return socket_; + } + + tcp::endpoint remote_endpoint() + { + return socket_.remote_endpoint(); + } + + bool is_open() + { + return socket_.is_open(); + } + + void close() + { + asio::error_code ec; + socket_.close(ec); + } + + void shutdown_readwrite() + { + asio::error_code ec; + socket_.shutdown(asio::socket_base::shutdown_type::shutdown_both, ec); + } + + void shutdown_write() + { + asio::error_code ec; + socket_.shutdown(asio::socket_base::shutdown_type::shutdown_send, ec); + } + + void shutdown_read() + { + asio::error_code ec; + socket_.shutdown(asio::socket_base::shutdown_type::shutdown_receive, ec); + } + + template + void start(F f) + { + f(asio::error_code()); + } + + tcp::socket socket_; + }; + +#ifdef CROW_ENABLE_SSL + struct SSLAdaptor + { + using context = asio::ssl::context; + using ssl_socket_t = asio::ssl::stream; + SSLAdaptor(asio::io_service& io_service, context* ctx): + ssl_socket_(new ssl_socket_t(io_service, *ctx)) + {} + + asio::ssl::stream& socket() + { + return *ssl_socket_; + } + + tcp::socket::lowest_layer_type& + raw_socket() + { + return ssl_socket_->lowest_layer(); + } + + tcp::endpoint remote_endpoint() + { + return raw_socket().remote_endpoint(); + } + + bool is_open() + { + return ssl_socket_ ? raw_socket().is_open() : false; + } + + void close() + { + if (is_open()) + { + asio::error_code ec; + raw_socket().close(ec); + } + } + + void shutdown_readwrite() + { + if (is_open()) + { + asio::error_code ec; + raw_socket().shutdown(asio::socket_base::shutdown_type::shutdown_both, ec); + } + } + + void shutdown_write() + { + if (is_open()) + { + asio::error_code ec; + raw_socket().shutdown(asio::socket_base::shutdown_type::shutdown_send, ec); + } + } + + void shutdown_read() + { + if (is_open()) + { + asio::error_code ec; + raw_socket().shutdown(asio::socket_base::shutdown_type::shutdown_receive, ec); + } + } + + asio::io_service& get_io_service() + { + return GET_IO_SERVICE(raw_socket()); + } + + template + void start(F f) + { + ssl_socket_->async_handshake(asio::ssl::stream_base::server, + [f](const asio::error_code& ec) { + f(ec); + }); + } + + std::unique_ptr> ssl_socket_; + }; +#endif +} // namespace crow diff --git a/src/lib/crow/task_timer.h b/src/lib/crow/task_timer.h new file mode 100644 index 0000000..5ced714 --- /dev/null +++ b/src/lib/crow/task_timer.h @@ -0,0 +1,137 @@ +#pragma once + +#ifndef ASIO_STANDALONE +#define ASIO_STANDALONE +#endif +#include +#include + +#include +#include +#include +#include + +#include "crow/logging.h" + +namespace crow +{ + namespace detail + { + + /// A class for scheduling functions to be called after a specific amount of ticks. A tick is equal to 1 second. + class task_timer + { + public: + using task_type = std::function; + using identifier_type = size_t; + + private: + using clock_type = std::chrono::steady_clock; + using time_type = clock_type::time_point; + + public: + task_timer(asio::io_service& io_service): + io_service_(io_service), timer_(io_service_) + { + timer_.expires_after(std::chrono::seconds(1)); + timer_.async_wait( + std::bind(&task_timer::tick_handler, this, std::placeholders::_1)); + } + + ~task_timer() { timer_.cancel(); } + + void cancel(identifier_type id) + { + tasks_.erase(id); + CROW_LOG_DEBUG << "task_timer cancelled: " << this << ' ' << id; + } + + /// Schedule the given task to be executed after the default amount of ticks. + + /// + /// \return identifier_type Used to cancel the thread. + /// It is not bound to this task_timer instance and in some cases could lead to + /// undefined behavior if used with other task_timer objects or after the task + /// has been successfully executed. + identifier_type schedule(const task_type& task) + { + tasks_.insert( + {++highest_id_, + {clock_type::now() + std::chrono::seconds(get_default_timeout()), + task}}); + CROW_LOG_DEBUG << "task_timer scheduled: " << this << ' ' << highest_id_; + return highest_id_; + } + + /// Schedule the given task to be executed after the given time. + + /// + /// \param timeout The amount of ticks (seconds) to wait before execution. + /// + /// \return identifier_type Used to cancel the thread. + /// It is not bound to this task_timer instance and in some cases could lead to + /// undefined behavior if used with other task_timer objects or after the task + /// has been successfully executed. + identifier_type schedule(const task_type& task, std::uint8_t timeout) + { + tasks_.insert({++highest_id_, + {clock_type::now() + std::chrono::seconds(timeout), task}}); + CROW_LOG_DEBUG << "task_timer scheduled: " << this << ' ' << highest_id_; + return highest_id_; + } + + /// Set the default timeout for this task_timer instance. (Default: 5) + + /// + /// \param timeout The amount of ticks (seconds) to wait before execution. + void set_default_timeout(std::uint8_t timeout) { default_timeout_ = timeout; } + + /// Get the default timeout. (Default: 5) + std::uint8_t get_default_timeout() const { return default_timeout_; } + + private: + void process_tasks() + { + time_type current_time = clock_type::now(); + std::vector finished_tasks; + + for (const auto& task : tasks_) + { + if (task.second.first < current_time) + { + (task.second.second)(); + finished_tasks.push_back(task.first); + CROW_LOG_DEBUG << "task_timer called: " << this << ' ' << task.first; + } + } + + for (const auto& task : finished_tasks) + tasks_.erase(task); + + // If no task is currently scheduled, reset the issued ids back to 0. + if (tasks_.empty()) highest_id_ = 0; + } + + void tick_handler(const asio::error_code& ec) + { + if (ec) return; + + process_tasks(); + + timer_.expires_after(std::chrono::seconds(1)); + timer_.async_wait( + std::bind(&task_timer::tick_handler, this, std::placeholders::_1)); + } + + private: + std::uint8_t default_timeout_{5}; + asio::io_service& io_service_; + asio::basic_waitable_timer timer_; + std::map> tasks_; + + // A continuosly increasing number to be issued to threads to identify them. + // If no tasks are scheduled, it will be reset to 0. + identifier_type highest_id_{0}; + }; + } // namespace detail +} // namespace crow diff --git a/src/lib/crow/utility.h b/src/lib/crow/utility.h new file mode 100644 index 0000000..be5b08c --- /dev/null +++ b/src/lib/crow/utility.h @@ -0,0 +1,901 @@ +#pragma once + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "crow/settings.h" + +#if defined(CROW_CAN_USE_CPP17) && !defined(CROW_FILESYSTEM_IS_EXPERIMENTAL) +#include +#endif + +// TODO(EDev): Adding C++20's [[likely]] and [[unlikely]] attributes might be useful +#if defined(__GNUG__) || defined(__clang__) +#define CROW_LIKELY(X) __builtin_expect(!!(X), 1) +#define CROW_UNLIKELY(X) __builtin_expect(!!(X), 0) +#else +#define CROW_LIKELY(X) (X) +#define CROW_UNLIKELY(X) (X) +#endif + +namespace crow +{ + /// @cond SKIP + namespace black_magic + { +#ifndef CROW_MSVC_WORKAROUND + /// Out of Range Exception for const_str + struct OutOfRange + { + OutOfRange(unsigned /*pos*/, unsigned /*length*/) {} + }; + /// Helper function to throw an exception if i is larger than len + constexpr unsigned requires_in_range(unsigned i, unsigned len) + { + return i >= len ? throw OutOfRange(i, len) : i; + } + + /// A constant string implementation. + class const_str + { + const char* const begin_; + unsigned size_; + + public: + template + constexpr const_str(const char (&arr)[N]): + begin_(arr), size_(N - 1) + { + static_assert(N >= 1, "not a string literal"); + } + constexpr char operator[](unsigned i) const + { + return requires_in_range(i, size_), begin_[i]; + } + + constexpr operator const char*() const + { + return begin_; + } + + constexpr const char* begin() const { return begin_; } + constexpr const char* end() const { return begin_ + size_; } + + constexpr unsigned size() const + { + return size_; + } + }; + + constexpr unsigned find_closing_tag(const_str s, unsigned p) + { + return s[p] == '>' ? p : find_closing_tag(s, p + 1); + } + + /// Check that the CROW_ROUTE string is valid + constexpr bool is_valid(const_str s, unsigned i = 0, int f = 0) + { + return i == s.size() ? f == 0 : + f < 0 || f >= 2 ? false : + s[i] == '<' ? is_valid(s, i + 1, f + 1) : + s[i] == '>' ? is_valid(s, i + 1, f - 1) : + is_valid(s, i + 1, f); + } + + constexpr bool is_equ_p(const char* a, const char* b, unsigned n) + { + return *a == 0 && *b == 0 && n == 0 ? true : + (*a == 0 || *b == 0) ? false : + n == 0 ? true : + *a != *b ? false : + is_equ_p(a + 1, b + 1, n - 1); + } + + constexpr bool is_equ_n(const_str a, unsigned ai, const_str b, unsigned bi, unsigned n) + { + return ai + n > a.size() || bi + n > b.size() ? false : + n == 0 ? true : + a[ai] != b[bi] ? false : + is_equ_n(a, ai + 1, b, bi + 1, n - 1); + } + + constexpr bool is_int(const_str s, unsigned i) + { + return is_equ_n(s, i, "", 0, 5); + } + + constexpr bool is_uint(const_str s, unsigned i) + { + return is_equ_n(s, i, "", 0, 6); + } + + constexpr bool is_float(const_str s, unsigned i) + { + return is_equ_n(s, i, "", 0, 7) || + is_equ_n(s, i, "", 0, 8); + } + + constexpr bool is_str(const_str s, unsigned i) + { + return is_equ_n(s, i, "", 0, 5) || + is_equ_n(s, i, "", 0, 8); + } + + constexpr bool is_path(const_str s, unsigned i) + { + return is_equ_n(s, i, "", 0, 6); + } +#endif + template + struct parameter_tag + { + static const int value = 0; + }; +#define CROW_INTERNAL_PARAMETER_TAG(t, i) \ + template<> \ + struct parameter_tag \ + { \ + static const int value = i; \ + } + CROW_INTERNAL_PARAMETER_TAG(int, 1); + CROW_INTERNAL_PARAMETER_TAG(char, 1); + CROW_INTERNAL_PARAMETER_TAG(short, 1); + CROW_INTERNAL_PARAMETER_TAG(long, 1); + CROW_INTERNAL_PARAMETER_TAG(long long, 1); + CROW_INTERNAL_PARAMETER_TAG(unsigned int, 2); + CROW_INTERNAL_PARAMETER_TAG(unsigned char, 2); + CROW_INTERNAL_PARAMETER_TAG(unsigned short, 2); + CROW_INTERNAL_PARAMETER_TAG(unsigned long, 2); + CROW_INTERNAL_PARAMETER_TAG(unsigned long long, 2); + CROW_INTERNAL_PARAMETER_TAG(double, 3); + CROW_INTERNAL_PARAMETER_TAG(std::string, 4); +#undef CROW_INTERNAL_PARAMETER_TAG + template + struct compute_parameter_tag_from_args_list; + + template<> + struct compute_parameter_tag_from_args_list<> + { + static const int value = 0; + }; + + template + struct compute_parameter_tag_from_args_list + { + static const int sub_value = + compute_parameter_tag_from_args_list::value; + static const int value = + parameter_tag::type>::value ? sub_value * 6 + parameter_tag::type>::value : sub_value; + }; + + static inline bool is_parameter_tag_compatible(uint64_t a, uint64_t b) + { + if (a == 0) + return b == 0; + if (b == 0) + return a == 0; + int sa = a % 6; + int sb = a % 6; + if (sa == 5) sa = 4; + if (sb == 5) sb = 4; + if (sa != sb) + return false; + return is_parameter_tag_compatible(a / 6, b / 6); + } + + static inline unsigned find_closing_tag_runtime(const char* s, unsigned p) + { + return s[p] == 0 ? throw std::runtime_error("unmatched tag <") : + s[p] == '>' ? p : + find_closing_tag_runtime(s, p + 1); + } + + static inline uint64_t get_parameter_tag_runtime(const char* s, unsigned p = 0) + { + return s[p] == 0 ? 0 : + s[p] == '<' ? ( + std::strncmp(s + p, "", 5) == 0 ? get_parameter_tag_runtime(s, find_closing_tag_runtime(s, p)) * 6 + 1 : + std::strncmp(s + p, "", 6) == 0 ? get_parameter_tag_runtime(s, find_closing_tag_runtime(s, p)) * 6 + 2 : + (std::strncmp(s + p, "", 7) == 0 || + std::strncmp(s + p, "", 8) == 0) ? + get_parameter_tag_runtime(s, find_closing_tag_runtime(s, p)) * 6 + 3 : + (std::strncmp(s + p, "", 5) == 0 || + std::strncmp(s + p, "", 8) == 0) ? + get_parameter_tag_runtime(s, find_closing_tag_runtime(s, p)) * 6 + 4 : + std::strncmp(s + p, "", 6) == 0 ? get_parameter_tag_runtime(s, find_closing_tag_runtime(s, p)) * 6 + 5 : + throw std::runtime_error("invalid parameter type")) : + get_parameter_tag_runtime(s, p + 1); + } +#ifndef CROW_MSVC_WORKAROUND + constexpr uint64_t get_parameter_tag(const_str s, unsigned p = 0) + { + return p == s.size() ? 0 : + s[p] == '<' ? ( + is_int(s, p) ? get_parameter_tag(s, find_closing_tag(s, p)) * 6 + 1 : + is_uint(s, p) ? get_parameter_tag(s, find_closing_tag(s, p)) * 6 + 2 : + is_float(s, p) ? get_parameter_tag(s, find_closing_tag(s, p)) * 6 + 3 : + is_str(s, p) ? get_parameter_tag(s, find_closing_tag(s, p)) * 6 + 4 : + is_path(s, p) ? get_parameter_tag(s, find_closing_tag(s, p)) * 6 + 5 : + throw std::runtime_error("invalid parameter type")) : + get_parameter_tag(s, p + 1); + } +#endif + + template + struct S + { + template + using push = S; + template + using push_back = S; + template class U> + using rebind = U; + }; + + // Check whether the template function can be called with specific arguments + template + struct CallHelper; + template + struct CallHelper> + { + template()(std::declval()...))> + static char __test(int); + + template + static int __test(...); + + static constexpr bool value = sizeof(__test(0)) == sizeof(char); + }; + + // Check Tuple contains type T + template + struct has_type; + + template + struct has_type> : std::false_type + {}; + + template + struct has_type> : has_type> + {}; + + template + struct has_type> : std::true_type + {}; + + // Find index of type in tuple + template + struct tuple_index; + + template + struct tuple_index> + { + static const int value = 0; + }; + + template + struct tuple_index> + { + static const int value = 1 + tuple_index>::value; + }; + + // Extract element from forward tuple or get default +#ifdef CROW_CAN_USE_CPP14 + template + typename std::enable_if::value, typename std::decay::type&&>::type + tuple_extract(Tup& tup) + { + return std::move(std::get(tup)); + } +#else + template + typename std::enable_if::value, T&&>::type + tuple_extract(Tup& tup) + { + return std::move(std::get::value>(tup)); + } +#endif + + template + typename std::enable_if::value, T>::type + tuple_extract(Tup&) + { + return T{}; + } + + // Kind of fold expressions in C++11 + template + struct bool_pack; + template + using all_true = std::is_same, bool_pack>; + + template + struct single_tag_to_type + {}; + + template<> + struct single_tag_to_type<1> + { + using type = int64_t; + }; + + template<> + struct single_tag_to_type<2> + { + using type = uint64_t; + }; + + template<> + struct single_tag_to_type<3> + { + using type = double; + }; + + template<> + struct single_tag_to_type<4> + { + using type = std::string; + }; + + template<> + struct single_tag_to_type<5> + { + using type = std::string; + }; + + + template + struct arguments + { + using subarguments = typename arguments::type; + using type = + typename subarguments::template push::type>; + }; + + template<> + struct arguments<0> + { + using type = S<>; + }; + + template + struct last_element_type + { + using type = typename std::tuple_element>::type; + }; + + + template<> + struct last_element_type<> + {}; + + + // from http://stackoverflow.com/questions/13072359/c11-compile-time-array-with-logarithmic-evaluation-depth + template + using Invoke = typename T::type; + + template + struct seq + { + using type = seq; + }; + + template + struct concat; + + template + struct concat, seq> : seq + {}; + + template + using Concat = Invoke>; + + template + struct gen_seq; + template + using GenSeq = Invoke>; + + template + struct gen_seq : Concat, GenSeq> + {}; + + template<> + struct gen_seq<0> : seq<> + {}; + template<> + struct gen_seq<1> : seq<0> + {}; + + template + struct pop_back_helper; + + template + struct pop_back_helper, Tuple> + { + template class U> + using rebind = U::type...>; + }; + + template + struct pop_back //: public pop_back_helper::type, std::tuple> + { + template class U> + using rebind = typename pop_back_helper::type, std::tuple>::template rebind; + }; + + template<> + struct pop_back<> + { + template class U> + using rebind = U<>; + }; + + // from http://stackoverflow.com/questions/2118541/check-if-c0x-parameter-pack-contains-a-type + template + struct contains : std::true_type + {}; + + template + struct contains : std::conditional::value, std::true_type, contains>::type + {}; + + template + struct contains : std::false_type + {}; + + template + struct empty_context + {}; + + template + struct promote + { + using type = T; + }; + +#define CROW_INTERNAL_PROMOTE_TYPE(t1, t2) \ + template<> \ + struct promote \ + { \ + using type = t2; \ + } + + CROW_INTERNAL_PROMOTE_TYPE(char, int64_t); + CROW_INTERNAL_PROMOTE_TYPE(short, int64_t); + CROW_INTERNAL_PROMOTE_TYPE(int, int64_t); + CROW_INTERNAL_PROMOTE_TYPE(long, int64_t); + CROW_INTERNAL_PROMOTE_TYPE(long long, int64_t); + CROW_INTERNAL_PROMOTE_TYPE(unsigned char, uint64_t); + CROW_INTERNAL_PROMOTE_TYPE(unsigned short, uint64_t); + CROW_INTERNAL_PROMOTE_TYPE(unsigned int, uint64_t); + CROW_INTERNAL_PROMOTE_TYPE(unsigned long, uint64_t); + CROW_INTERNAL_PROMOTE_TYPE(unsigned long long, uint64_t); + CROW_INTERNAL_PROMOTE_TYPE(float, double); +#undef CROW_INTERNAL_PROMOTE_TYPE + + template + using promote_t = typename promote::type; + + } // namespace black_magic + + namespace detail + { + + template + struct get_index_of_element_from_tuple_by_type_impl + { + static constexpr auto value = N; + }; + + template + struct get_index_of_element_from_tuple_by_type_impl + { + static constexpr auto value = N; + }; + + template + struct get_index_of_element_from_tuple_by_type_impl + { + static constexpr auto value = get_index_of_element_from_tuple_by_type_impl::value; + }; + } // namespace detail + + namespace utility + { + template + T& get_element_by_type(std::tuple& t) + { + return std::get::value>(t); + } + + template + struct function_traits; + +#ifndef CROW_MSVC_WORKAROUND + template + struct function_traits : public function_traits + { + using parent_t = function_traits; + static const size_t arity = parent_t::arity; + using result_type = typename parent_t::result_type; + template + using arg = typename parent_t::template arg; + }; +#endif + + template + struct function_traits + { + static const size_t arity = sizeof...(Args); + + typedef R result_type; + + template + using arg = typename std::tuple_element>::type; + }; + + template + struct function_traits + { + static const size_t arity = sizeof...(Args); + + typedef R result_type; + + template + using arg = typename std::tuple_element>::type; + }; + + template + struct function_traits> + { + static const size_t arity = sizeof...(Args); + + typedef R result_type; + + template + using arg = typename std::tuple_element>::type; + }; + /// @endcond + + inline static std::string base64encode(const unsigned char* data, size_t size, const char* key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/") + { + std::string ret; + ret.resize((size + 2) / 3 * 4); + auto it = ret.begin(); + while (size >= 3) + { + *it++ = key[(static_cast(*data) & 0xFC) >> 2]; + unsigned char h = (static_cast(*data++) & 0x03) << 4; + *it++ = key[h | ((static_cast(*data) & 0xF0) >> 4)]; + h = (static_cast(*data++) & 0x0F) << 2; + *it++ = key[h | ((static_cast(*data) & 0xC0) >> 6)]; + *it++ = key[static_cast(*data++) & 0x3F]; + + size -= 3; + } + if (size == 1) + { + *it++ = key[(static_cast(*data) & 0xFC) >> 2]; + unsigned char h = (static_cast(*data++) & 0x03) << 4; + *it++ = key[h]; + *it++ = '='; + *it++ = '='; + } + else if (size == 2) + { + *it++ = key[(static_cast(*data) & 0xFC) >> 2]; + unsigned char h = (static_cast(*data++) & 0x03) << 4; + *it++ = key[h | ((static_cast(*data) & 0xF0) >> 4)]; + h = (static_cast(*data++) & 0x0F) << 2; + *it++ = key[h]; + *it++ = '='; + } + return ret; + } + + inline static std::string base64encode(std::string data, size_t size, const char* key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/") + { + return base64encode((const unsigned char*)data.c_str(), size, key); + } + + inline static std::string base64encode_urlsafe(const unsigned char* data, size_t size) + { + return base64encode(data, size, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"); + } + + inline static std::string base64encode_urlsafe(std::string data, size_t size) + { + return base64encode((const unsigned char*)data.c_str(), size, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"); + } + + inline static std::string base64decode(const char* data, size_t size) + { + // We accept both regular and url encoding here, as there does not seem to be any downside to that. + // If we want to distinguish that we should use +/ for non-url and -_ for url. + + // Mapping logic from characters to [0-63] + auto key = [](char c) -> unsigned char { + if ((c >= 'A') && (c <= 'Z')) return c - 'A'; + if ((c >= 'a') && (c <= 'z')) return c - 'a' + 26; + if ((c >= '0') && (c <= '9')) return c - '0' + 52; + if ((c == '+') || (c == '-')) return 62; + if ((c == '/') || (c == '_')) return 63; + return 0; + }; + + // Not padded + if (size % 4 == 2) // missing last 2 characters + size = (size / 4 * 3) + 1; // Not subtracting extra characters because they're truncated in int division + else if (size % 4 == 3) // missing last character + size = (size / 4 * 3) + 2; // Not subtracting extra characters because they're truncated in int division + + // Padded + else if (data[size - 2] == '=') // padded with '==' + size = (size / 4 * 3) - 2; // == padding means the last block only has 1 character instead of 3, hence the '-2' + else if (data[size - 1] == '=') // padded with '=' + size = (size / 4 * 3) - 1; // = padding means the last block only has 2 character instead of 3, hence the '-1' + + // Padding not needed + else + size = size / 4 * 3; + + std::string ret; + ret.resize(size); + auto it = ret.begin(); + + // These will be used to decode 1 character at a time + unsigned char odd; // char1 and char3 + unsigned char even; // char2 and char4 + + // Take 4 character blocks to turn into 3 + while (size >= 3) + { + // dec_char1 = (char1 shifted 2 bits to the left) OR ((char2 AND 00110000) shifted 4 bits to the right)) + odd = key(*data++); + even = key(*data++); + *it++ = (odd << 2) | ((even & 0x30) >> 4); + // dec_char2 = ((char2 AND 00001111) shifted 4 bits left) OR ((char3 AND 00111100) shifted 2 bits right)) + odd = key(*data++); + *it++ = ((even & 0x0F) << 4) | ((odd & 0x3C) >> 2); + // dec_char3 = ((char3 AND 00000011) shifted 6 bits left) OR (char4) + even = key(*data++); + *it++ = ((odd & 0x03) << 6) | (even); + + size -= 3; + } + if (size == 2) + { + // d_char1 = (char1 shifted 2 bits to the left) OR ((char2 AND 00110000) shifted 4 bits to the right)) + odd = key(*data++); + even = key(*data++); + *it++ = (odd << 2) | ((even & 0x30) >> 4); + // d_char2 = ((char2 AND 00001111) shifted 4 bits left) OR ((char3 AND 00111100) shifted 2 bits right)) + odd = key(*data++); + *it++ = ((even & 0x0F) << 4) | ((odd & 0x3C) >> 2); + } + else if (size == 1) + { + // d_char1 = (char1 shifted 2 bits to the left) OR ((char2 AND 00110000) shifted 4 bits to the right)) + odd = key(*data++); + even = key(*data++); + *it++ = (odd << 2) | ((even & 0x30) >> 4); + } + return ret; + } + + inline static std::string base64decode(const std::string& data, size_t size) + { + return base64decode(data.data(), size); + } + + inline static std::string base64decode(const std::string& data) + { + return base64decode(data.data(), data.length()); + } + + + inline static void sanitize_filename(std::string& data, char replacement = '_') + { + if (data.length() > 255) + data.resize(255); + + static const auto toUpper = [](char c) { + return ((c >= 'a') && (c <= 'z')) ? (c - ('a' - 'A')) : c; + }; + // Check for special device names. The Windows behavior is really odd here, it will consider both AUX and AUX.txt + // a special device. Thus we search for the string (case-insensitive), and then check if the string ends or if + // is has a dangerous follow up character (.:\/) + auto sanitizeSpecialFile = [](std::string& source, unsigned ofs, const char* pattern, bool includeNumber, char replacement) { + unsigned i = ofs; + size_t len = source.length(); + const char* p = pattern; + while (*p) + { + if (i >= len) return; + if (toUpper(source[i]) != *p) return; + ++i; + ++p; + } + if (includeNumber) + { + if ((i >= len) || (source[i] < '1') || (source[i] > '9')) return; + ++i; + } + if ((i >= len) || (source[i] == '.') || (source[i] == ':') || (source[i] == '/') || (source[i] == '\\')) + { + source.erase(ofs + 1, (i - ofs) - 1); + source[ofs] = replacement; + } + }; + bool checkForSpecialEntries = true; + for (unsigned i = 0; i < data.length(); ++i) + { + // Recognize directory traversals and the special devices CON/PRN/AUX/NULL/COM[1-]/LPT[1-9] + if (checkForSpecialEntries) + { + checkForSpecialEntries = false; + switch (toUpper(data[i])) + { + case 'A': + sanitizeSpecialFile(data, i, "AUX", false, replacement); + break; + case 'C': + sanitizeSpecialFile(data, i, "CON", false, replacement); + sanitizeSpecialFile(data, i, "COM", true, replacement); + break; + case 'L': + sanitizeSpecialFile(data, i, "LPT", true, replacement); + break; + case 'N': + sanitizeSpecialFile(data, i, "NUL", false, replacement); + break; + case 'P': + sanitizeSpecialFile(data, i, "PRN", false, replacement); + break; + case '.': + sanitizeSpecialFile(data, i, "..", false, replacement); + break; + } + } + + // Sanitize individual characters + unsigned char c = data[i]; + if ((c < ' ') || ((c >= 0x80) && (c <= 0x9F)) || (c == '?') || (c == '<') || (c == '>') || (c == ':') || (c == '*') || (c == '|') || (c == '\"')) + { + data[i] = replacement; + } + else if ((c == '/') || (c == '\\')) + { + if (CROW_UNLIKELY(i == 0)) //Prevent Unix Absolute Paths (Windows Absolute Paths are prevented with `(c == ':')`) + { + data[i] = replacement; + } + else + { + checkForSpecialEntries = true; + } + } + } + } + + inline static std::string random_alphanum(std::size_t size) + { + static const char alphabet[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; + std::random_device dev; + std::mt19937 rng(dev()); + std::uniform_int_distribution dist(0, sizeof(alphabet) - 2); + std::string out; + out.reserve(size); + for (std::size_t i = 0; i < size; i++) + out.push_back(alphabet[dist(rng)]); + return out; + } + + inline static std::string join_path(std::string path, const std::string& fname) + { +#if defined(CROW_CAN_USE_CPP17) && !defined(CROW_FILESYSTEM_IS_EXPERIMENTAL) + return (std::filesystem::path(path) / fname).string(); +#else + if (!(path.back() == '/' || path.back() == '\\')) + path += '/'; + path += fname; + return path; +#endif + } + + /** + * @brief Checks two string for equality. + * Always returns false if strings differ in size. + * Defaults to case-insensitive comparison. + */ + inline static bool string_equals(const std::string& l, const std::string& r, bool case_sensitive = false) + { + if (l.length() != r.length()) + return false; + + for (size_t i = 0; i < l.length(); i++) + { + if (case_sensitive) + { + if (l[i] != r[i]) + return false; + } + else + { + if (std::toupper(l[i]) != std::toupper(r[i])) + return false; + } + } + + return true; + } + + template + inline static T lexical_cast(const U& v) + { + std::stringstream stream; + T res; + + stream << v; + stream >> res; + + return res; + } + + template + inline static T lexical_cast(const char* v, size_t count) + { + std::stringstream stream; + T res; + + stream.write(v, count); + stream >> res; + + return res; + } + + + /// Return a copy of the given string with its + /// leading and trailing whitespaces removed. + inline static std::string trim(const std::string& v) + { + if (v.empty()) + return ""; + + size_t begin = 0, end = v.length(); + + size_t i; + for (i = 0; i < v.length(); i++) + { + if (!std::isspace(v[i])) + { + begin = i; + break; + } + } + + if (i == v.length()) + return ""; + + for (i = v.length(); i > 0; i--) + { + if (!std::isspace(v[i - 1])) + { + end = i; + break; + } + } + + return v.substr(begin, end - begin); + } + } // namespace utility +} // namespace crow diff --git a/src/lib/crow/version.h b/src/lib/crow/version.h new file mode 100644 index 0000000..e584a54 --- /dev/null +++ b/src/lib/crow/version.h @@ -0,0 +1,6 @@ +#pragma once + +namespace crow +{ + constexpr const char VERSION[] = "master"; +} diff --git a/src/lib/crow/websocket.h b/src/lib/crow/websocket.h new file mode 100644 index 0000000..c7d8f06 --- /dev/null +++ b/src/lib/crow/websocket.h @@ -0,0 +1,744 @@ +#pragma once +#include +#include "crow/logging.h" +#include "crow/socket_adaptors.h" +#include "crow/http_request.h" +#include "crow/TinySHA1.hpp" +#include "crow/utility.h" + +namespace crow +{ + namespace websocket + { + enum class WebSocketReadState + { + MiniHeader, + Len16, + Len64, + Mask, + Payload, + }; + + /// A base class for websocket connection. + struct connection + { + virtual void send_binary(std::string msg) = 0; + virtual void send_text(std::string msg) = 0; + virtual void send_ping(std::string msg) = 0; + virtual void send_pong(std::string msg) = 0; + virtual void close(std::string const& msg = "quit") = 0; + virtual std::string get_remote_ip() = 0; + virtual ~connection() = default; + + void userdata(void* u) { userdata_ = u; } + void* userdata() { return userdata_; } + + private: + void* userdata_; + }; + + // Modified version of the illustration in RFC6455 Section-5.2 + // + // + // 0 1 2 3 -byte + // 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 -bit + // +-+-+-+-+-------+-+-------------+-------------------------------+ + // |F|R|R|R| opcode|M| Payload len | Extended payload length | + // |I|S|S|S| (4) |A| (7) | (16/64) | + // |N|V|V|V| |S| | (if payload len==126/127) | + // | |1|2|3| |K| | | + // +-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - + + // | Extended payload length continued, if payload len == 127 | + // + - - - - - - - - - - - - - - - +-------------------------------+ + // | |Masking-key, if MASK set to 1 | + // +-------------------------------+-------------------------------+ + // | Masking-key (continued) | Payload Data | + // +-------------------------------- - - - - - - - - - - - - - - - + + // : Payload Data continued ... : + // + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + + // | Payload Data continued ... | + // +---------------------------------------------------------------+ + // + + /// A websocket connection. + + template + class Connection : public connection + { + public: + /// Constructor for a connection. + + /// + /// Requires a request with an "Upgrade: websocket" header.
+ /// Automatically handles the handshake. + Connection(const crow::request& req, Adaptor&& adaptor, Handler* handler, uint64_t max_payload, + std::function open_handler, + std::function message_handler, + std::function close_handler, + std::function error_handler, + std::function accept_handler): + adaptor_(std::move(adaptor)), + handler_(handler), + max_payload_bytes_(max_payload), + open_handler_(std::move(open_handler)), + message_handler_(std::move(message_handler)), + close_handler_(std::move(close_handler)), + error_handler_(std::move(error_handler)), + accept_handler_(std::move(accept_handler)) + { + if (!utility::string_equals(req.get_header_value("upgrade"), "websocket")) + { + adaptor_.close(); + handler_->remove_websocket(this); + delete this; + return; + } + + if (accept_handler_) + { + void* ud = nullptr; + if (!accept_handler_(req, &ud)) + { + adaptor_.close(); + handler_->remove_websocket(this); + delete this; + return; + } + userdata(ud); + } + + // Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ== + // Sec-WebSocket-Version: 13 + std::string magic = req.get_header_value("Sec-WebSocket-Key") + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; + sha1::SHA1 s; + s.processBytes(magic.data(), magic.size()); + uint8_t digest[20]; + s.getDigestBytes(digest); + + start(crow::utility::base64encode((unsigned char*)digest, 20)); + } + + ~Connection() noexcept override + { + // Do not modify anchor_ here since writing shared_ptr is not atomic. + auto watch = std::weak_ptr{anchor_}; + + // Wait until all unhandled asynchronous operations to join. + // As the deletion occurs inside 'check_destroy()', which already locks + // anchor, use count can be 1 on valid deletion context. + while (watch.use_count() > 2) // 1 for 'check_destroy() routine', 1 for 'this->anchor_' + { + std::this_thread::yield(); + } + } + + template + struct WeakWrappedMessage + { + Callable callable; + std::weak_ptr watch; + + void operator()() + { + if (auto anchor = watch.lock()) + { + std::move(callable)(); + } + } + }; + + /// Send data through the socket. + template + void dispatch(CompletionHandler&& handler) + { + asio::dispatch(adaptor_.get_io_service(), + WeakWrappedMessage::type>{ + std::forward(handler), anchor_}); + } + + /// Send data through the socket and return immediately. + template + void post(CompletionHandler&& handler) + { + asio::post(adaptor_.get_io_service(), + WeakWrappedMessage::type>{ + std::forward(handler), anchor_}); + } + + /// Send a "Ping" message. + + /// + /// Usually invoked to check if the other point is still online. + void send_ping(std::string msg) override + { + send_data(0x9, std::move(msg)); + } + + /// Send a "Pong" message. + + /// + /// Usually automatically invoked as a response to a "Ping" message. + void send_pong(std::string msg) override + { + send_data(0xA, std::move(msg)); + } + + /// Send a binary encoded message. + void send_binary(std::string msg) override + { + send_data(0x2, std::move(msg)); + } + + /// Send a plaintext message. + void send_text(std::string msg) override + { + send_data(0x1, std::move(msg)); + } + + /// Send a close signal. + + /// + /// Sets a flag to destroy the object once the message is sent. + void close(std::string const& msg) override + { + dispatch([this, msg]() mutable { + has_sent_close_ = true; + if (has_recv_close_ && !is_close_handler_called_) + { + is_close_handler_called_ = true; + if (close_handler_) + close_handler_(*this, msg); + } + auto header = build_header(0x8, msg.size()); + write_buffers_.emplace_back(std::move(header)); + write_buffers_.emplace_back(msg); + do_write(); + }); + } + + std::string get_remote_ip() override + { + return adaptor_.remote_endpoint().address().to_string(); + } + + void set_max_payload_size(uint64_t payload) + { + max_payload_bytes_ = payload; + } + + protected: + /// Generate the websocket headers using an opcode and the message size (in bytes). + std::string build_header(int opcode, size_t size) + { + char buf[2 + 8] = "\x80\x00"; + buf[0] += opcode; + if (size < 126) + { + buf[1] += static_cast(size); + return {buf, buf + 2}; + } + else if (size < 0x10000) + { + buf[1] += 126; + *(uint16_t*)(buf + 2) = htons(static_cast(size)); + return {buf, buf + 4}; + } + else + { + buf[1] += 127; + *reinterpret_cast(buf + 2) = ((1 == htonl(1)) ? static_cast(size) : (static_cast(htonl((size)&0xFFFFFFFF)) << 32) | htonl(static_cast(size) >> 32)); + return {buf, buf + 10}; + } + } + + /// Send the HTTP upgrade response. + + /// + /// Finishes the handshake process, then starts reading messages from the socket. + void start(std::string&& hello) + { + static const std::string header = + "HTTP/1.1 101 Switching Protocols\r\n" + "Upgrade: websocket\r\n" + "Connection: Upgrade\r\n" + "Sec-WebSocket-Accept: "; + write_buffers_.emplace_back(header); + write_buffers_.emplace_back(std::move(hello)); + write_buffers_.emplace_back(crlf); + write_buffers_.emplace_back(crlf); + do_write(); + if (open_handler_) + open_handler_(*this); + do_read(); + } + + /// Read a websocket message. + + /// + /// Involves:
+ /// Handling headers (opcodes, size).
+ /// Unmasking the payload.
+ /// Reading the actual payload.
+ void do_read() + { + if (has_sent_close_ && has_recv_close_) + { + close_connection_ = true; + adaptor_.shutdown_readwrite(); + adaptor_.close(); + check_destroy(); + return; + } + + is_reading = true; + switch (state_) + { + case WebSocketReadState::MiniHeader: + { + mini_header_ = 0; + //asio::async_read(adaptor_.socket(), asio::buffer(&mini_header_, 1), + adaptor_.socket().async_read_some( + asio::buffer(&mini_header_, 2), + [this](const asio::error_code& ec, std::size_t +#ifdef CROW_ENABLE_DEBUG + bytes_transferred +#endif + ) + + { + is_reading = false; + mini_header_ = ntohs(mini_header_); +#ifdef CROW_ENABLE_DEBUG + + if (!ec && bytes_transferred != 2) + { + throw std::runtime_error("WebSocket:MiniHeader:async_read fail:asio bug?"); + } +#endif + + if (!ec) + { + if ((mini_header_ & 0x80) == 0x80) + has_mask_ = true; + else //if the websocket specification is enforced and the message isn't masked, terminate the connection + { +#ifndef CROW_ENFORCE_WS_SPEC + has_mask_ = false; +#else + close_connection_ = true; + adaptor_.shutdown_readwrite(); + adaptor_.close(); + if (error_handler_) + error_handler_(*this, "Client connection not masked."); + check_destroy(); +#endif + } + + if ((mini_header_ & 0x7f) == 127) + { + state_ = WebSocketReadState::Len64; + } + else if ((mini_header_ & 0x7f) == 126) + { + state_ = WebSocketReadState::Len16; + } + else + { + remaining_length_ = mini_header_ & 0x7f; + state_ = WebSocketReadState::Mask; + } + do_read(); + } + else + { + close_connection_ = true; + adaptor_.shutdown_readwrite(); + adaptor_.close(); + if (error_handler_) + error_handler_(*this, ec.message()); + check_destroy(); + } + }); + } + break; + case WebSocketReadState::Len16: + { + remaining_length_ = 0; + remaining_length16_ = 0; + asio::async_read( + adaptor_.socket(), asio::buffer(&remaining_length16_, 2), + [this](const asio::error_code& ec, std::size_t +#ifdef CROW_ENABLE_DEBUG + bytes_transferred +#endif + ) { + is_reading = false; + remaining_length16_ = ntohs(remaining_length16_); + remaining_length_ = remaining_length16_; +#ifdef CROW_ENABLE_DEBUG + if (!ec && bytes_transferred != 2) + { + throw std::runtime_error("WebSocket:Len16:async_read fail:asio bug?"); + } +#endif + + if (!ec) + { + state_ = WebSocketReadState::Mask; + do_read(); + } + else + { + close_connection_ = true; + adaptor_.shutdown_readwrite(); + adaptor_.close(); + if (error_handler_) + error_handler_(*this, ec.message()); + check_destroy(); + } + }); + } + break; + case WebSocketReadState::Len64: + { + asio::async_read( + adaptor_.socket(), asio::buffer(&remaining_length_, 8), + [this](const asio::error_code& ec, std::size_t +#ifdef CROW_ENABLE_DEBUG + bytes_transferred +#endif + ) { + is_reading = false; + remaining_length_ = ((1 == ntohl(1)) ? (remaining_length_) : (static_cast(ntohl((remaining_length_)&0xFFFFFFFF)) << 32) | ntohl((remaining_length_) >> 32)); +#ifdef CROW_ENABLE_DEBUG + if (!ec && bytes_transferred != 8) + { + throw std::runtime_error("WebSocket:Len16:async_read fail:asio bug?"); + } +#endif + + if (!ec) + { + state_ = WebSocketReadState::Mask; + do_read(); + } + else + { + close_connection_ = true; + adaptor_.shutdown_readwrite(); + adaptor_.close(); + if (error_handler_) + error_handler_(*this, ec.message()); + check_destroy(); + } + }); + } + break; + case WebSocketReadState::Mask: + if (remaining_length_ > max_payload_bytes_) + { + close_connection_ = true; + adaptor_.close(); + if (error_handler_) + error_handler_(*this, "Message length exceeds maximum payload."); + check_destroy(); + } + else if (has_mask_) + { + asio::async_read( + adaptor_.socket(), asio::buffer((char*)&mask_, 4), + [this](const asio::error_code& ec, std::size_t +#ifdef CROW_ENABLE_DEBUG + bytes_transferred +#endif + ) { + is_reading = false; +#ifdef CROW_ENABLE_DEBUG + if (!ec && bytes_transferred != 4) + { + throw std::runtime_error("WebSocket:Mask:async_read fail:asio bug?"); + } +#endif + + if (!ec) + { + state_ = WebSocketReadState::Payload; + do_read(); + } + else + { + close_connection_ = true; + if (error_handler_) + error_handler_(*this, ec.message()); + adaptor_.shutdown_readwrite(); + adaptor_.close(); + check_destroy(); + } + }); + } + else + { + state_ = WebSocketReadState::Payload; + do_read(); + } + break; + case WebSocketReadState::Payload: + { + auto to_read = static_cast(buffer_.size()); + if (remaining_length_ < to_read) + to_read = remaining_length_; + adaptor_.socket().async_read_some( + asio::buffer(buffer_, static_cast(to_read)), + [this](const asio::error_code& ec, std::size_t bytes_transferred) { + is_reading = false; + + if (!ec) + { + fragment_.insert(fragment_.end(), buffer_.begin(), buffer_.begin() + bytes_transferred); + remaining_length_ -= bytes_transferred; + if (remaining_length_ == 0) + { + if (handle_fragment()) + { + state_ = WebSocketReadState::MiniHeader; + do_read(); + } + } + else + do_read(); + } + else + { + close_connection_ = true; + if (error_handler_) + error_handler_(*this, ec.message()); + adaptor_.shutdown_readwrite(); + adaptor_.close(); + check_destroy(); + } + }); + } + break; + } + } + + /// Check if the FIN bit is set. + bool is_FIN() + { + return mini_header_ & 0x8000; + } + + /// Extract the opcode from the header. + int opcode() + { + return (mini_header_ & 0x0f00) >> 8; + } + + /// Process the payload fragment. + + /// + /// Unmasks the fragment, checks the opcode, merges fragments into 1 message body, and calls the appropriate handler. + bool handle_fragment() + { + if (has_mask_) + { + for (decltype(fragment_.length()) i = 0; i < fragment_.length(); i++) + { + fragment_[i] ^= ((char*)&mask_)[i % 4]; + } + } + switch (opcode()) + { + case 0: // Continuation + { + message_ += fragment_; + if (is_FIN()) + { + if (message_handler_) + message_handler_(*this, message_, is_binary_); + message_.clear(); + } + } + break; + case 1: // Text + { + is_binary_ = false; + message_ += fragment_; + if (is_FIN()) + { + if (message_handler_) + message_handler_(*this, message_, is_binary_); + message_.clear(); + } + } + break; + case 2: // Binary + { + is_binary_ = true; + message_ += fragment_; + if (is_FIN()) + { + if (message_handler_) + message_handler_(*this, message_, is_binary_); + message_.clear(); + } + } + break; + case 0x8: // Close + { + has_recv_close_ = true; + if (!has_sent_close_) + { + close(fragment_); + } + else + { + adaptor_.shutdown_readwrite(); + adaptor_.close(); + close_connection_ = true; + if (!is_close_handler_called_) + { + if (close_handler_) + close_handler_(*this, fragment_); + is_close_handler_called_ = true; + } + check_destroy(); + return false; + } + } + break; + case 0x9: // Ping + { + send_pong(fragment_); + } + break; + case 0xA: // Pong + { + pong_received_ = true; + } + break; + } + + fragment_.clear(); + return true; + } + + /// Send the buffers' data through the socket. + + /// + /// Also destroys the object if the Close flag is set. + void do_write() + { + if (sending_buffers_.empty()) + { + sending_buffers_.swap(write_buffers_); + std::vector buffers; + buffers.reserve(sending_buffers_.size()); + for (auto& s : sending_buffers_) + { + buffers.emplace_back(asio::buffer(s)); + } + auto watch = std::weak_ptr{anchor_}; + asio::async_write( + adaptor_.socket(), buffers, + [&, watch](const asio::error_code& ec, std::size_t /*bytes_transferred*/) { + if (!ec && !close_connection_) + { + sending_buffers_.clear(); + if (!write_buffers_.empty()) + do_write(); + if (has_sent_close_) + close_connection_ = true; + } + else + { + auto anchor = watch.lock(); + if (anchor == nullptr) { return; } + + sending_buffers_.clear(); + close_connection_ = true; + check_destroy(); + } + }); + } + } + + /// Destroy the Connection. + void check_destroy() + { + //if (has_sent_close_ && has_recv_close_) + if (!is_close_handler_called_) + if (close_handler_) + close_handler_(*this, "uncleanly"); + handler_->remove_websocket(this); + if (sending_buffers_.empty() && !is_reading) + delete this; + } + + + struct SendMessageType + { + std::string payload; + Connection* self; + int opcode; + + void operator()() + { + self->send_data_impl(this); + } + }; + + void send_data_impl(SendMessageType* s) + { + auto header = build_header(s->opcode, s->payload.size()); + write_buffers_.emplace_back(std::move(header)); + write_buffers_.emplace_back(std::move(s->payload)); + do_write(); + } + + void send_data(int opcode, std::string&& msg) + { + SendMessageType event_arg{ + std::move(msg), + this, + opcode}; + + post(std::move(event_arg)); + } + + private: + Adaptor adaptor_; + Handler* handler_; + + std::vector sending_buffers_; + std::vector write_buffers_; + + std::array buffer_; + bool is_binary_; + std::string message_; + std::string fragment_; + WebSocketReadState state_{WebSocketReadState::MiniHeader}; + uint16_t remaining_length16_{0}; + uint64_t remaining_length_{0}; + uint64_t max_payload_bytes_{UINT64_MAX}; + bool close_connection_{false}; + bool is_reading{false}; + bool has_mask_{false}; + uint32_t mask_; + uint16_t mini_header_; + bool has_sent_close_{false}; + bool has_recv_close_{false}; + bool error_occurred_{false}; + bool pong_received_{false}; + bool is_close_handler_called_{false}; + + std::shared_ptr anchor_ = std::make_shared(); // Value is just for placeholding + + std::function open_handler_; + std::function message_handler_; + std::function close_handler_; + std::function error_handler_; + std::function accept_handler_; + }; + } // namespace websocket +} // namespace crow diff --git a/src/optional_lex.h b/src/optional_lex.h index ec57e8e..3873eea 100644 --- a/src/optional_lex.h +++ b/src/optional_lex.h @@ -1,43 +1,231 @@ #ifndef __UNIGD_OPTIONAL_LEX_H__ #define __UNIGD_OPTIONAL_LEX_H__ -#include -#include +#include +#include #include namespace httpgd { + +/** + * @brief Convert a string to a std::experimental::optional. + * + * @tparam T The type to convert to. + * @param t_param The string to convert. + * @return std::experimental::optional The converted value. + */ template -inline boost::optional param_to(const char *t_param) +inline std::experimental::optional param_to(const char* t_param) +{ + static_assert(sizeof(T) == 0, "Unsupported type"); + return std::experimental::nullopt; +} + +// Specializations + +template <> +inline std::experimental::optional param_to(const char* t_param) +{ + if (t_param == nullptr) + { + return std::experimental::nullopt; + } + try + { + return std::stoi(t_param); + } + catch (const std::invalid_argument& ia) + { + return std::experimental::nullopt; + } + catch (const std::out_of_range& oor) + { + return std::experimental::nullopt; + } +} + +template <> +inline std::experimental::optional param_to(const char* t_param) +{ + if (t_param == nullptr) + { + return std::experimental::nullopt; + } + try + { + return std::stoul(t_param); + } + catch (const std::invalid_argument& ia) + { + return std::experimental::nullopt; + } + catch (const std::out_of_range& oor) + { + return std::experimental::nullopt; + } +} + +template <> +inline std::experimental::optional param_to(const char* t_param) +{ + if (t_param == nullptr) + { + return std::experimental::nullopt; + } + if (strcmp(t_param, "true") == 0) + { + return true; + } + if (strcmp(t_param, "false") == 0) + { + return false; + } + return std::experimental::nullopt; +} + +template <> +inline std::experimental::optional param_to(const char* t_param) { if (t_param == nullptr) { - return boost::none; + return std::experimental::nullopt; } try { - return boost::lexical_cast(t_param); + return std::stod(t_param); } - catch (...) + catch (const std::invalid_argument& ia) { + return std::experimental::nullopt; + } + catch (const std::out_of_range& oor) + { + return std::experimental::nullopt; } - return boost::none; } + template <> -inline boost::optional param_to(const char *t_param) +inline std::experimental::optional param_to(const char* t_param) { if (t_param == nullptr) { - return boost::none; + return std::experimental::nullopt; + } + try + { + return std::stof(t_param); + } + catch (const std::invalid_argument& ia) + { + return std::experimental::nullopt; + } + catch (const std::out_of_range& oor) + { + return std::experimental::nullopt; + } +} + +template <> +inline std::experimental::optional param_to(const char* t_param) +{ + if (t_param == nullptr) + { + return std::experimental::nullopt; + } + try + { + return std::stol(t_param); + } + catch (const std::invalid_argument& ia) + { + return std::experimental::nullopt; + } + catch (const std::out_of_range& oor) + { + return std::experimental::nullopt; + } +} + +template <> +inline std::experimental::optional param_to(const char* t_param) +{ + if (t_param == nullptr) + { + return std::experimental::nullopt; + } + try + { + return std::stoul(t_param); + } + catch (const std::invalid_argument& ia) + { + return std::experimental::nullopt; + } + catch (const std::out_of_range& oor) + { + return std::experimental::nullopt; + } +} + +template <> +inline std::experimental::optional param_to(const char* t_param) +{ + if (t_param == nullptr) + { + return std::experimental::nullopt; + } + try + { + return std::stoll(t_param); + } + catch (const std::invalid_argument& ia) + { + return std::experimental::nullopt; + } + catch (const std::out_of_range& oor) + { + return std::experimental::nullopt; + } +} + +template <> +inline std::experimental::optional param_to(const char* t_param) +{ + if (t_param == nullptr) + { + return std::experimental::nullopt; + } + try + { + return std::stoull(t_param); + } + catch (const std::invalid_argument& ia) + { + return std::experimental::nullopt; + } + catch (const std::out_of_range& oor) + { + return std::experimental::nullopt; + } +} + +template <> +inline std::experimental::optional param_to(const char* t_param) +{ + if (t_param == nullptr) + { + return std::experimental::nullopt; } return std::string(t_param); } + template <> -inline boost::optional param_to(const char *t_param) +inline std::experimental::optional param_to(const char* t_param) { if (t_param == nullptr) { - return boost::none; + return std::experimental::nullopt; } return t_param; }