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qwamp.cpp
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///////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2016 United Networks SE
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
///////////////////////////////////////////////////////////////////////////////
#include "qwamp.h"
#include <exception>
#include <QCoreApplication>
#include <QtConcurrent>
#include <QDebug>
#include <QFuture>
#include <QFutureWatcher>
#include <QIODevice>
#include <QString>
#include <QVariant>
#include <msgpack.h>
#include <arpa/inet.h>
#include <string.h>
namespace QWamp {
QString HmacSHA256(const QString &secret, const QString &key) {
// Need to do for XOR operation. Transforms QString to unsigned char
QByteArray k = secret.toLatin1();
// Length of secret word
int kLength = k.length();
// Inner padding
QByteArray ipad;
// Outer padding
QByteArray opad;
// If secret key > 64 bytes use this to obtain sha256 key
if (kLength > 64) {
k = QCryptographicHash::hash(k, QCryptographicHash::Sha256);
kLength = 20;
}
// Fills ipad and opad with zeros
ipad.fill(0, 64);
opad.fill(0, 64);
// Copies Secret to ipad and opad
ipad.replace(0, kLength, k);
opad.replace(0, kLength, k);
// XOR operation for inner and outer pad
for (int i = 0; i < 64; i++) {
ipad[i] = ipad[i] ^ 0x36;
opad[i] = opad[i] ^ 0x5c;
}
// Stores hashed content
QByteArray context;
// Appends XOR:ed ipad to context
context.append(ipad, 64);
// Appends key to context
context.append(key);
//Hashes inner pad
QByteArray sha256 = QCryptographicHash::hash(context, QCryptographicHash::Sha256);
context.clear();
//Appends opad to context
context.append(opad, 64);
//Appends hashed inner pad to context
context.append(sha256);
// Hashes outerpad
sha256 = QCryptographicHash::hash(context, QCryptographicHash::Sha256);
// String to return hashed stuff in Base64 format
return sha256.toBase64();
}
Session::Session(QIODevice &in, QIODevice &out, Session::MessageFormat messageFormat, bool debug)
: QObject(0),
m_debug(debug),
m_stopped(false),
m_in(in),
m_out(out),
m_websocket(*(QWebSocket *)0),
m_isJoined(false),
m_msgRead(0),
m_sessionId(0),
m_requestId(0),
m_goodbyeSent(false),
m_messageFormat(messageFormat),
m_transportType(TransportType::RawSocket),
state(Initial) {
connect(&m_in, &QIODevice::readyRead, this, &QWamp::Session::readData);
connect(&m_in, &QIODevice::readChannelFinished, [this]() {
m_stopped = true;
state = Initial;
});
init();
}
void Session::init()
{
}
Session::Session(QIODevice &inout, Session::MessageFormat transport, bool debug) : Session(inout, inout, transport, debug)
{
}
Session::Session(const QString &name, QIODevice &in, QIODevice &out, Session::MessageFormat transport, bool debug) : Session(in, out, transport, debug)
{
m_name = name;
}
Session::Session(const QString &name, QIODevice &inout, Session::MessageFormat transport, bool debug) : Session(name, inout, inout, transport, debug)
{
}
Session::Session(QWebSocket &websocket, Session::MessageFormat messageFormat, bool debug)
: QObject(0),
m_debug(debug),
m_stopped(false),
m_in(*(QIODevice *)0),
m_out(*(QIODevice *)0),
m_websocket(websocket),
m_isJoined(false),
m_msgRead(0),
m_sessionId(0),
m_requestId(0),
m_goodbyeSent(false),
m_messageFormat(messageFormat),
m_transportType(TransportType::WebSocket),
state(Initial) {
connect(&m_websocket, &QWebSocket::readChannelFinished, [this]() {
m_stopped = true;
state = Initial;
});
connect(&m_websocket, &QWebSocket::textMessageReceived, this, &QWamp::Session::readMessage);
init();
}
Session::Session(const QString &name, QWebSocket &websocket, Session::MessageFormat messageFormat, bool debug) : Session(websocket, messageFormat, debug)
{
m_name = name;
}
const QString &Session::name() const
{
return m_name;
}
void Session::setName(const QString &name)
{
m_name = name;
}
void Session::provideGetMethods() {
provide("api.getMethods", [this](const QVariantList &, const QVariantMap &) {
QVariantList l;
for (auto methodIterator = m_methods.cbegin(); methodIterator != m_methods.cend(); ++ methodIterator) {
QVariantMap st;
QVariantList ml;
for (const QString &method : methodIterator.value()) {
QVariantMap m;
m["name"] = method;
ml << m;
}
st["class"] = methodIterator.key();
st["methods"] = ml;
l << st;
}
return l;
});
}
void Session::provideStatistics() {
provide("api.getStatistics", [this](const QVariantList &args, const QVariantMap &kwargs) {
int totalCalls = 0;
int totalTime = 0;
QVariantMap stl;
for (const QString &key : m_callStatistics.keys()) {
const CallStatistics &c = m_callStatistics[key];
totalCalls += c.callCount;
totalTime += c.callCount * c.averageTime;
stl[key] = QVariantMap{{ "calls", c.callCount }, { "averageTime", c.averageTime }};
}
QVariantMap st;
st["procedures"] = stl;
st["totalCalls"] = totalCalls;
if (totalCalls) {
st["totalAverage"] = totalTime / totalCalls;
}
else {
st["totalAverage"] = 0;
}
return st;
});
}
void Session::start() {
if (m_transportType == TransportType::RawSocket) {
// Send the initial handshake packet informing the server which
// serialization format we wish to use, and our maximum message size
//
m_bufferMsgLen[0] = 0x7F; // magic byte
m_bufferMsgLen[1] = 0xF2; // we are ready to receive messages up to 2**24 octets and encoded using MsgPack
m_bufferMsgLen[2] = 0x00; // reserved
m_bufferMsgLen[3] = 0x00; // reserved
m_out.write(m_bufferMsgLen, sizeof(m_bufferMsgLen));
}
else {
state = State::Started;
Q_EMIT started();
}
}
void Session::readData() {
while(m_in.bytesAvailable()) {
if (state == Initial) {
getHandshakeReply();
}
else if (state == Started) {
getMsgHeader();
}
else {
getMsgBody();
}
if (m_stopped) {
break;
}
}
}
void Session::readMessage(const QString &msg) {
static int firstMessageLength = -1; //ugly hack for probably QWebSocket bug, which first emits signal
QString message = msg; //with hello message and then with hello message joined with the
if (firstMessageLength == -1) { //following one
firstMessageLength = msg.length();
}
else if (firstMessageLength) {
message = message.mid(firstMessageLength);
firstMessageLength = 0;
}
QVariant nv;
QJsonParseError parseError;
nv = QJsonDocument::fromJson(message.toUtf8(), &parseError).toVariant();
if (parseError.error != QJsonParseError::NoError) {
throw ProtocolError(parseError.errorString());
}
gotMsg(nv);
}
void Session::getHandshakeReply() {
m_in.read(m_bufferMsgLen, sizeof(m_bufferMsgLen));
if (m_bufferMsgLen[0] != 0x7F) {
throw ProtocolError("invalid magic byte in RawSocket handshake response");
}
if (((m_bufferMsgLen[1] & 0x0F) != 0x02)) {
// FIXME: this isn't exactly a "protocol error" => invent new exception
throw ProtocolError("RawSocket handshake reply: server does not speak MsgPack encoding");
}
state = Started;
Q_EMIT started();
}
void Session::stop() {
m_stopped = true;
try {
m_in.close();
}
catch (...) {
}
try {
m_out.close();
}
catch (...) {
}
state = Initial;
}
void Session::join(const QString &realm, const QString &authid, const QStringList &authmethods) {
// [HELLO, Realm|uri, Details|dict]
QVariantList msg;
msg << static_cast<int>(WampMsgCode::HELLO) << realm;
QVariantMap roles;
roles["caller"] = QVariantMap();
roles["callee"] = QVariantMap();
roles["publisher"] = QVariantMap();
roles["subscriber"] = QVariantMap();
QVariantMap m;
m["roles"] = roles;
if (!authid.isEmpty()) {
m["authid"] = authid;
if (!authmethods.isEmpty()) {
m["authmethods"] = authmethods;
}
}
msg << m;
send(msg);
}
void Session::subscribe(const QString &topic, Handler handler) {
if (!m_sessionId) {
throw NoSessionError();
}
// [SUBSCRIBE, Request|id, Options|dict, Topic|uri]
m_requestId += 1;
subscribeRequests.insert(m_requestId, SubscribeRequest(topic, handler));
QVariantList message;
message << static_cast<int>(WampMsgCode::SUBSCRIBE) << m_requestId << QVariantMap() << topic;
send(message);
}
void Session::authenticate(const QString &credentials)
{
QVariantList message;
message << static_cast<int>(WampMsgCode::AUTHENTICATE) << credentials << QVariantMap();
send(message);
}
void Session::provide(const QString& procedure, Endpoint::Function endpointFunction, Endpoint::Type endpointType, const QVariantMap &options) {
if (!m_sessionId) {
throw NoSessionError();
}
QStringList procedureParts = procedure.split('.');
if (procedureParts.count() == 1) {
m_methods[""] << procedure;
}
else {
m_methods[procedureParts[0]] << procedureParts.mid(1).join('.');
}
m_requestId += 1;
Endpoint endpoint;
QString procedureName = makeName(procedure);
if (m_debug) {
Endpoint::Function wrappedEndpointFunction = [this, procedure, endpointFunction, procedureName](const QVariantList &args, const QVariantMap &kwargs)->QVariant {
QTime timer;
timer.start();
QByteArray argsJson = "(";
if (args.count()) {
argsJson += QJsonDocument::fromVariant(args).toJson(QJsonDocument::Compact).mid(1);
argsJson.chop(1);
}
argsJson += ")";
qDebug() << "Called" << qUtf8Printable(procedureName) << argsJson.constData();
QVariant result = endpointFunction(args, kwargs);
int elapsed = timer.elapsed();
qDebug() << "execution elapsed" << elapsed << "ms";
CallStatistics &cst = m_callStatistics[procedure];
int tm = cst.callCount * cst.averageTime + elapsed;
++cst.callCount;
cst.averageTime = tm / cst.callCount;
return result;
};
endpoint = { wrappedEndpointFunction, endpointType };
}
else {
endpoint = { endpointFunction, endpointType };
}
registerRequests.insert(m_requestId, RegisterRequest(procedureName, endpoint));
// [REGISTER, Request|id, Options|dict, Procedure|uri]
send(QVariantList() << static_cast<int>(WampMsgCode::REGISTER) << m_requestId << options << procedureName);
}
void Session::publish(const QString &topic, const QVariantList &args, const QVariantMap &kwargs) {
if (!m_sessionId) {
throw NoSessionError();
}
m_requestId += 1;
if (m_debug) {
QByteArray argsJson = "(";
if (args.count()) {
argsJson += QJsonDocument::fromVariant(args).toJson(QJsonDocument::Compact).mid(1);
argsJson.chop(1);
}
argsJson += ")";
qDebug().noquote() << "Publishing" << makeName(topic) << argsJson.constData();
}
// [PUBLISH, Request|id, Options|dict, Topic|uri, Arguments|list, ArgumentsKw|dict]
QVariantList message;
message << static_cast<int>(WampMsgCode::PUBLISH) << m_requestId << QVariantMap() << makeName(topic);
if (args.count()) {
message << QVariant(args);
if (kwargs.count()) {
message << kwargs;
}
}
send(message);
}
QString Session::makeName(const QString &name) const
{
QString n = m_name;
if (!n.isEmpty()) {
n += QStringLiteral(".");
}
return n + name;
}
QVariantList Session::convertParams(const QVariantList &args) {
QVariantList r;
for (const QVariant &v : args) {
r << convertParam(v);
}
return r;
}
QVariant Session::convertParam(const QVariant &arg) {
if (arg.type() == QVariant::List) {
QVariantList r;
for (const QVariant &v : arg.toList()) {
r << convertParam(v);
}
return r;
}
if (arg.type() == QVariant::Map) {
QVariantMap r;
QVariantMap map = arg.toMap();
for (auto mapIterator = map.cbegin(); mapIterator != map.cend(); ++mapIterator) {
r.insert(mapIterator.key(), convertParam(mapIterator.value()));
}
return r;
}
if (arg.type() == QVariant::Date) {
return arg.toDate().toString(Qt::DateFormat::ISODate);
}
if (arg.type() == QVariant::DateTime) {
return arg.toDateTime().toString(Qt::DateFormat::ISODate);
}
if (arg.type() != QVariant::UserType && QMetaType(arg.type()).flags() & QMetaType::IsEnumeration) {
return arg.toString();
}
if (arg.type() == QVariant::UserType && QMetaType(arg.userType()).flags() & QMetaType::IsEnumeration) {
return arg.toString();
}
return arg;
}
QVariant Session::call(const QString &procedure, const QVariantList &args, const QVariantMap &kwargs) {
if (!m_sessionId) {
throw NoSessionError();
}
m_requestId += 1;
CallRequests::iterator callRequestsIterator = callRequests.insert(m_requestId, CallRequest());
// [CALL, Request|id, Options|dict, Procedure|uri]
QVariantList message;
message << static_cast<int> (WampMsgCode::CALL) << m_requestId << QVariantMap() << procedure;
if (args.count()) {
message << QVariant(convertParams(args));
if (kwargs.count()) {
message << kwargs;
}
}
CallRequest &callRequest = callRequestsIterator.value();
if (m_transportType == TransportType::WebSocket) {
QEventLoop responseLoop;
QObject::connect(&m_websocket, &QWebSocket::textMessageReceived, [&responseLoop]() {
responseLoop.exit();
});
send(message);
while (true) {
responseLoop.exec();
QCoreApplication::processEvents();
if (callRequest.ready) { //add exception handling
break;
}
}
}
else { //m_transportType == TransportType::RawSocket
send(message);
while (true){
if (!m_in.waitForReadyRead(30000)) { //TODO handle timout as exception
break;
}
readData();
// QCoreApplication::processEvents(); //to call readData by signal
if (callRequest.ready) { //add exception handling
break;
}
}
}
QVariant result;
if (callRequest.ready) {
if (!callRequest.ex.isEmpty()) {
QVariantMap resultMap;
QVariantMap exception;
exception["what"] = callRequest.ex;
resultMap["exception"] = exception;
result = resultMap;
}
else {
result = callRequest.result;
}
}
else {
QVariantMap resultMap;
QVariantMap exception;
exception["what"] = "error ocured during waiting for call response";
resultMap["exception"] = exception;
result = resultMap;
}
callRequests.erase(callRequestsIterator);
return result;
}
// void Session::packQVariant(const QVariant& value) {
// if (value.isNull()) {
// m_packer.pack_nil();
// }
// else if (value.type() == QVariant::List || value.type() == QVariant::StringList) {
// packQVariant(value.toList());
// }
// else if (value.type() == QVariant::Map) {
// packQVariant(value.toMap());
// }
// else if (value.type() == QVariant::Int) {
// int val = value.toInt();
// m_packer.pack(val);
// }
// else if (value.type() == QVariant::LongLong) {
// uint64_t val = value.toLongLong();
// m_packer.pack(val);
// }
// else if (value.type() == QVariant::Bool) {
// bool val = value.toBool();
// m_packer.pack(val);
// }
// else if (value.type() == QVariant::Double) {
// double val = value.toDouble();
// m_packer.pack(val);
// }
// else if (value.type() == QVariant::String) {
// std::string val = value.toString().toStdString();
// m_packer.pack(val);
// }
// else if (value.type() == QVariant::ByteArray) {
// std::string val = value.toByteArray().toStdString();
// m_packer.pack(val);
// }
// else if (value.type() == QVariant::Date) {
// std::string val = value.toDate().toString(Qt::DateFormat::ISODate).toStdString();
// m_packer.pack(val);
// }
// else if (value.type() == QVariant::DateTime) {
// std::string val = value.toDateTime().toString(Qt::DateFormat::ISODate).toStdString();
// m_packer.pack(val);
// }
// else if (value.type() != QVariant::UserType && QMetaType(value.type()).flags() & QMetaType::IsEnumeration) {
// std::string val = value.toString().toStdString();
// m_packer.pack(val);
// }
// else if (value.type() == QVariant::UserType && QMetaType(value.userType()).flags() & QMetaType::IsEnumeration) {
// std::string val = value.toString().toStdString();
// m_packer.pack(val);
// }
// else {
// qDebug() << "Warning: don't know how to pack type" << value.typeName() << value.type();
// }
// }
void Session::processWelcome(const QVariantList &msg) {
if (msg.length() < 2) {
throw ProtocolError("Bad welcome response");
}
m_sessionId = msg[1].toULongLong();
m_isJoined = true;
Q_EMIT joined(m_sessionId);
}
void Session::processChallenge(const QVariantList &msg)
{
if (msg.length() != 3) {
throw ProtocolError("Bad challenge response");
}
QString method = msg[1].toString();
QString challengeString = msg[2].toMap()["challenge"].toString();
QVariantMap challengeMap = QJsonDocument::fromJson(challengeString.toUtf8()).toVariant().toMap();
Challenge challengeStruct;
challengeStruct.authid = challengeMap["authid"].toString();
challengeStruct.authmethod = challengeMap["authmethod"].toString();
challengeStruct.authprovider = challengeMap["authprovider"].toString();
challengeStruct.authrole = challengeMap["authrole"].toString();
challengeStruct.nonce = challengeMap["nonce"].toString();
challengeStruct.session = challengeMap["session"].toLongLong();
challengeStruct.timestamp = QDateTime::fromString(challengeMap["timestamp"].toString(), Qt::DateFormat::ISODate);
Q_EMIT challenge(method, challengeString, challengeStruct);
}
void Session::processGoodbye(const QVariantList &msg) {
m_sessionId = 0;
if (!m_goodbyeSent) {
// if we did not initiate closing, reply ..
// [GOODBYE, Details|dict, Reason|uri]
send(QVariantList() << static_cast<int> (WampMsgCode::GOODBYE) << QVariantMap() << QString("wamp.error.goodbye_and_out"));
}
else {
// we previously initiated closing, so this
// is the peer reply
}
if (msg.length() < 3) {
throw ProtocolError("Bad goobay response");
}
QString reason = msg[2].toString();
Q_EMIT left(reason);
m_goodbyeSent = false;
m_isJoined = false;
}
void Session::leave(const QString &reason) {
if (!m_sessionId) {
throw NoSessionError();
}
m_goodbyeSent = true;
m_sessionId = 0;
// [GOODBYE, Details|dict, Reason|uri]
send(QVariantList() << static_cast<int>(WampMsgCode::GOODBYE) << QVariantMap() << reason);
}
// QVariantList Session::unpackMsg(std::vector<msgpack::object> &v) {
// QList<QVariant> list;
// list.reserve(v.size());
// QTime timer;
// timer.start();
// qDebug() << "unpacking vector";
// for (msgpack::object &o : v) {
// list.append(unpackMsg(o));
// }
// qDebug() << "unpacked vector" << timer.elapsed();
// return list;
// }
// QVariant Session::unpackMsg(msgpack::object& obj) {
// switch (obj.type) {
// case msgpack::type::STR:
// return QVariant(QString::fromStdString(obj.as<std::string>()));
// case msgpack::type::POSITIVE_INTEGER:
// return QVariant((quint64)obj.as<uint64_t>());
// case msgpack::type::NEGATIVE_INTEGER:
// return QVariant((quint64)obj.as<int64_t>());
// case msgpack::type::BOOLEAN:
// return QVariant(obj.as<bool>());
// case msgpack::type::FLOAT:
// return QVariant(obj.as<double>());
// case msgpack::type::NIL:
// return QVariant();
// case msgpack::type::ARRAY:
// {
// std::vector<msgpack::object> in_vec;
// obj.convert(&in_vec);
// return QVariant(unpackMsg(in_vec));
// }
// case msgpack::type::MAP:
// {
// std::map<std::string, msgpack::object> in_map;
// obj.convert(&in_map);
// return QVariant(unpackMsg(in_map));
// }
// default:
// return QVariant();
// }
// }
void Session::processError(const QVariantList &msg) {
// [ERROR, REQUEST.Type|int, REQUEST.Request|id, Details|dict, Error|uri]
// [ERROR, REQUEST.Type|int, REQUEST.Request|id, Details|dict, Error|uri, Arguments|list]
// [ERROR, REQUEST.Type|int, REQUEST.Request|id, Details|dict, Error|uri, Arguments|list, ArgumentsKw|dict]
// message length
//
if (msg.length() != 5 && msg.length() != 6 && msg.length() != 7) {
throw ProtocolError("invalid ERROR message structure - length must be 5, 6 or 7");
}
// REQUEST.Type|int
//
if (!isUint64(msg[1])) {
throw ProtocolError("invalid ERROR message structure - REQUEST.Type must be an integer");
}
WampMsgCode request_type = static_cast<WampMsgCode>(msg[1].toInt());
if (request_type != WampMsgCode::CALL &&
request_type != WampMsgCode::REGISTER &&
request_type != WampMsgCode::UNREGISTER &&
request_type != WampMsgCode::PUBLISH &&
request_type != WampMsgCode::SUBSCRIBE &&
request_type != WampMsgCode::UNSUBSCRIBE) {
throw ProtocolError("invalid ERROR message - ERROR.Type must one of CALL, REGISTER, UNREGISTER, SUBSCRIBE, UNSUBSCRIBE");
}
// REQUEST.Request|id
//
if (!isUint64(msg[2])) {
throw ProtocolError("invalid ERROR message structure - REQUEST.Request must be an integer");
}
quint64 request_id = msg[2].toULongLong();
// Details
//
if (msg[3].type() != QVariant::Map) {
throw ProtocolError("invalid ERROR message structure - Details must be a dictionary");
}
// Error|uri
//
if (msg[4].type() != QVariant::String) {
throw ProtocolError("invalid ERROR message - Error must be a string (URI)");
}
QString error = msg[4].toString();
// Arguments|list
//
if (msg.length() > 5) {
if (msg[5].type() != QVariant::List) {
throw ProtocolError("invalid ERROR message structure - Arguments must be a list");
}
}
// ArgumentsKw|list
//
if (msg.length() > 6) {
if (msg[6].type() != QVariant::Map) {
throw ProtocolError("invalid ERROR message structure - ArgumentsKw must be a dictionary");
}
}
switch (request_type) {
case WampMsgCode::CALL:
{
//
// process CALL ERROR
//
CallRequests::iterator callIterator = callRequests.find(request_id);
if (callIterator != callRequests.end()) {
// FIXME: forward all error info .. also not sure if this is the correct
// way to use set_exception()
callIterator.value().ready = true;
callIterator.value().ex = error;
}
else {
throw ProtocolError("bogus ERROR message for non-pending CALL request ID");
}
}
break;
// FIXME: handle other error messages
default:
qDebug() << QStringLiteral("unhandled ERROR message") << (int)request_type;
}
}
void Session::processInvocation(const QVariantList &msg) {
// [INVOCATION, Request|id, REGISTERED.Registration|id, Details|dict]
// [INVOCATION, Request|id, REGISTERED.Registration|id, Details|dict, CALL.Arguments|list]
// [INVOCATION, Request|id, REGISTERED.Registration|id, Details|dict, CALL.Arguments|list, CALL.ArgumentsKw|dict]
if (msg.length() != 4 && msg.length() != 5 && msg.length() != 6) {
throw ProtocolError("invalid INVOCATION message structure - length must be 4, 5 or 6");
}
if (!isUint64(msg[1])) {
throw ProtocolError("invalid INVOCATION message structure - INVOCATION.Request must be an integer");
}
quint64 request_id = msg[1].toULongLong();
if (!isUint64(msg[2])) {
throw ProtocolError("invalid INVOCATION message structure - INVOCATION.Registration must be an integer");
}
quint64 registration_id = msg[2].toULongLong();
const QHash<quint64, Endpoint>::iterator endpointIterator = endpoints.find(registration_id);
if (endpointIterator == endpoints.end()) {
throw ProtocolError("bogus RESULT message for non-pending request ID");
}
else {
Endpoint endpoint = endpointIterator.value();
if (msg[3].type() != QVariant::Map) {
throw ProtocolError("invalid INVOCATION message structure - Details must be a dictionary");
}
QVariantList args;
QVariantMap kwargs;
Endpoint::Function endpointFunction;
if (endpointWrapper) {
endpointFunction = [this, endpoint](const QVariantList &args, const QVariantMap &kwargs) {
return endpointWrapper(args, kwargs, endpoint.function);
};
}
else {
endpointFunction = endpoint.function;
}
if (msg.length() > 4) {
if (msg[4].type() != QVariant::List) {
throw ProtocolError("invalid INVOCATION message structure - INVOCATION.Arguments must be a list");
}
args = msg[4].toList();
if (msg.length() > 5) {
if (msg[5].type() != QVariant::Map) {
throw ProtocolError("invalid INVOCATION message structure - INVOCATION.ArgumentsKw must be a dictionary");
}
kwargs = msg[5].toMap();
}
}
// [YIELD, INVOCATION.Request|id, Options|dict]
// [YIELD, INVOCATION.Request|id, Options|dict, Arguments|list]
// [YIELD, INVOCATION.Request|id, Options|dict, Arguments|list, ArgumentsKw|dict]
try {
if (endpoint.type == Endpoint::Sync) {
QVariant res = endpointFunction(args, kwargs);
send(QVariantList() << static_cast<int>(WampMsgCode::YIELD) << request_id << QVariantMap() << QVariant(QVariantList() << res));
}
else {
QFutureWatcher<QVariant> *watcher = new QFutureWatcher<QVariant>();
QFuture<QVariant> future = QtConcurrent::run(endpointFunction, args, kwargs);
QObject::connect(watcher, &QFutureWatcher<QVariant>::finished, [this, request_id, watcher, future] {
QVariant res = future.result();
send(QVariantList() << static_cast<int>(WampMsgCode::YIELD) << request_id << QVariantMap() << QVariant(QVariantList() << res));
watcher->deleteLater();
});
watcher->setFuture(future);
}
}
// [ERROR, INVOCATION, INVOCATION.Request|id, Details|dict, Error|uri]
// [ERROR, INVOCATION, INVOCATION.Request|id, Details|dict, Error|uri, Arguments|list]
// [ERROR, INVOCATION, INVOCATION.Request|id, Details|dict, Error|uri, Arguments|list, ArgumentsKw|dict]
// FIXME: implement Autobahn-specific exception with error URI
catch (const std::exception& e) {
// we can at least describe the error with e.what()
//
QVariantMap exception;
exception["what"] = e.what();
send(QVariantList()
<< static_cast<int>(WampMsgCode::ERROR)
<< static_cast<int> (WampMsgCode::INVOCATION)
<< request_id
<< QVariantMap()
<< "wamp.error.runtime_error"
<< QVariantList()
<< exception
);
}
catch (...) {
// no information available on actual error
//
send(QVariantList()
<< static_cast<int>(WampMsgCode::ERROR)
<< static_cast<int> (WampMsgCode::INVOCATION)
<< request_id
<< QVariantMap()
<< "wamp.error.runtime_error"
);
}
}
}
void Session::processCallResult(const QVariantList &msg) {
// [RESULT, CALL.Request|id, Details|dict]
// [RESULT, CALL.Request|id, Details|dict, YIELD.Arguments|list]
// [RESULT, CALL.Request|id, Details|dict, YIELD.Arguments|list, YIELD.ArgumentsKw|dict]
if (msg.length() != 3 && msg.length() != 4 && msg.length() != 5) {
throw ProtocolError("invalid RESULT message structure - length must be 3, 4 or 5");
}
if (!isUint64(msg[1])) {
throw ProtocolError("invalid RESULT message structure - CALL.Request must be an integer");
}
quint64 request_id = msg[1].toULongLong();
CallRequests::iterator callRequestIterator = callRequests.find(request_id);
if (callRequestIterator != callRequests.end()) {
CallRequest &callRequest = callRequestIterator.value();
callRequest.ready = true;
if (msg[2].type() != QVariant::Map) {
throw ProtocolError("invalid RESULT message structure - Details must be a dictionary");
}
if (msg.length() > 3) {
if (msg[3].type() != QVariant::List) {
throw ProtocolError("invalid RESULT message structure - YIELD.Arguments must be a list");
}
QVariantList args = msg[3].toList();
if (args.length() > 0) {
callRequest.result = args[0];
}
}
}
}
bool Session::isUint64(const QVariant &v) {
return v.type() == QVariant::Int || v.type() == QVariant::LongLong || v.type() == QVariant::UInt || v.type() == QVariant::ULongLong || v.type() == QVariant::Double;
}
void Session::processSubscribed(const QVariantList &msg) {
// [SUBSCRIBED, SUBSCRIBE.Request|id, Subscription|id]
if (msg.length() != 3) {
throw ProtocolError("invalid SUBSCRIBED message structure - length must be 3");
}
if (!isUint64(msg[1])) {
throw ProtocolError("invalid SUBSCRIBED message structure - SUBSCRIBED.Request must be an integer");
}
quint64 request_id = msg[1].toULongLong();
SubscribeRequests::iterator subscribeRequestIterator = subscribeRequests.find(request_id);
if (subscribeRequestIterator == subscribeRequests.end()) {
throw ProtocolError("bogus SUBSCRIBED message for non-pending request ID");
}
else {