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mockhttp.py
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import re
import time
from functools import cached_property
from http.server import BaseHTTPRequestHandler
from urllib.parse import parse_qs, unquote, urlsplit
from h11 import SERVER, Connection, Data
from h11 import Request as H11Request
from mocket.compat import ENCODING, decode_from_bytes, do_the_magic, encode_to_bytes
from mocket.entry import MocketEntry
from mocket.mocket import Mocket
STATUS = {k: v[0] for k, v in BaseHTTPRequestHandler.responses.items()}
CRLF = "\r\n"
ASCII = "ascii"
class Request:
_parser = None
_event = None
def __init__(self, data):
self._parser = Connection(SERVER)
self.add_data(data)
def add_data(self, data):
self._parser.receive_data(data)
@property
def event(self):
if not self._event:
self._event = self._parser.next_event()
return self._event
@cached_property
def method(self):
return self.event.method.decode(ASCII)
@cached_property
def path(self):
return self.event.target.decode(ASCII)
@cached_property
def headers(self):
return {k.decode(ASCII): v.decode(ASCII) for k, v in self.event.headers}
@cached_property
def querystring(self):
parts = self.path.split("?", 1)
return (
parse_qs(unquote(parts[1]), keep_blank_values=True)
if len(parts) == 2
else {}
)
@cached_property
def body(self):
while True:
event = self._parser.next_event()
if isinstance(event, H11Request):
self._event = event
elif isinstance(event, Data):
return event.data.decode(ENCODING)
def __str__(self):
return f"{self.method} - {self.path} - {self.headers}"
class Response:
headers = None
is_file_object = False
def __init__(self, body="", status=200, headers=None):
headers = headers or {}
try:
# File Objects
self.body = body.read()
self.is_file_object = True
except AttributeError:
self.body = encode_to_bytes(body)
self.status = status
self.set_base_headers()
if headers is not None:
self.set_extra_headers(headers)
self.data = self.get_protocol_data() + self.body
def get_protocol_data(self, str_format_fun_name="capitalize"):
status_line = f"HTTP/1.1 {self.status} {STATUS[self.status]}"
header_lines = CRLF.join(
(
f"{getattr(k, str_format_fun_name)()}: {v}"
for k, v in self.headers.items()
)
)
return f"{status_line}\r\n{header_lines}\r\n\r\n".encode(ENCODING)
def set_base_headers(self):
self.headers = {
"Status": str(self.status),
"Date": time.strftime("%a, %d %b %Y %H:%M:%S GMT", time.gmtime()),
"Server": "Python/Mocket",
"Connection": "close",
"Content-Length": str(len(self.body)),
}
if not self.is_file_object:
self.headers["Content-Type"] = f"text/plain; charset={ENCODING}"
else:
self.headers["Content-Type"] = do_the_magic(self.body)
def set_extra_headers(self, headers):
r"""
>>> r = Response(body="<html />")
>>> len(r.headers.keys())
6
>>> r.set_extra_headers({"foo-bar": "Foobar"})
>>> len(r.headers.keys())
7
>>> encode_to_bytes(r.headers.get("Foo-Bar")) == encode_to_bytes("Foobar")
True
"""
for k, v in headers.items():
self.headers["-".join(token.capitalize() for token in k.split("-"))] = v
class Entry(MocketEntry):
CONNECT = "CONNECT"
DELETE = "DELETE"
GET = "GET"
HEAD = "HEAD"
OPTIONS = "OPTIONS"
PATCH = "PATCH"
POST = "POST"
PUT = "PUT"
TRACE = "TRACE"
METHODS = (CONNECT, DELETE, GET, HEAD, OPTIONS, PATCH, POST, PUT, TRACE)
request_cls = Request
response_cls = Response
def __init__(self, uri, method, responses, match_querystring=True):
uri = urlsplit(uri)
port = uri.port
if not port:
port = 443 if uri.scheme == "https" else 80
super().__init__((uri.hostname, port), responses)
self.schema = uri.scheme
self.path = uri.path
self.query = uri.query
self.method = method.upper()
self._sent_data = b""
self._match_querystring = match_querystring
def __repr__(self):
return f"{self.__class__.__name__}(method={self.method!r}, schema={self.schema!r}, location={self.location!r}, path={self.path!r}, query={self.query!r})"
def collect(self, data):
consume_response = True
decoded_data = decode_from_bytes(data)
if not decoded_data.startswith(Entry.METHODS):
Mocket.remove_last_request()
self._sent_data += data
consume_response = False
else:
self._sent_data = data
super().collect(self._sent_data)
return consume_response
def can_handle(self, data):
r"""
>>> e = Entry('http://www.github.com/?bar=foo&foobar', Entry.GET, (Response(b'<html/>'),))
>>> e.can_handle(b'GET /?bar=foo HTTP/1.1\r\nHost: github.com\r\nAccept-Encoding: gzip, deflate\r\nConnection: keep-alive\r\nUser-Agent: python-requests/2.7.0 CPython/3.4.3 Linux/3.19.0-16-generic\r\nAccept: */*\r\n\r\n')
False
>>> e = Entry('http://www.github.com/?bar=foo&foobar', Entry.GET, (Response(b'<html/>'),))
>>> e.can_handle(b'GET /?bar=foo&foobar HTTP/1.1\r\nHost: github.com\r\nAccept-Encoding: gzip, deflate\r\nConnection: keep-alive\r\nUser-Agent: python-requests/2.7.0 CPython/3.4.3 Linux/3.19.0-16-generic\r\nAccept: */*\r\n\r\n')
True
"""
try:
requestline, _ = decode_from_bytes(data).split(CRLF, 1)
method, path, _ = self._parse_requestline(requestline)
except ValueError:
return self is getattr(Mocket, "_last_entry", None)
uri = urlsplit(path)
can_handle = uri.path == self.path and method == self.method
if self._match_querystring:
kw = dict(keep_blank_values=True)
can_handle = can_handle and parse_qs(uri.query, **kw) == parse_qs(
self.query, **kw
)
if can_handle:
Mocket._last_entry = self
return can_handle
@staticmethod
def _parse_requestline(line):
"""
http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5
>>> Entry._parse_requestline('GET / HTTP/1.0') == ('GET', '/', '1.0')
True
>>> Entry._parse_requestline('post /testurl htTP/1.1') == ('POST', '/testurl', '1.1')
True
>>> Entry._parse_requestline('Im not a RequestLine')
Traceback (most recent call last):
...
ValueError: Not a Request-Line
"""
m = re.match(
r"({})\s+(.*)\s+HTTP/(1.[0|1])".format("|".join(Entry.METHODS)), line, re.I
)
if m:
return m.group(1).upper(), m.group(2), m.group(3)
raise ValueError("Not a Request-Line")
@classmethod
def register(cls, method, uri, *responses, **config):
if "body" in config or "status" in config:
raise AttributeError("Did you mean `Entry.single_register(...)`?")
default_config = dict(match_querystring=True, add_trailing_slash=True)
default_config.update(config)
config = default_config
if config["add_trailing_slash"] and not urlsplit(uri).path:
uri += "/"
Mocket.register(
cls(uri, method, responses, match_querystring=config["match_querystring"])
)
@classmethod
def single_register(
cls,
method,
uri,
body="",
status=200,
headers=None,
match_querystring=True,
exception=None,
):
response = (
exception
if exception
else cls.response_cls(body=body, status=status, headers=headers)
)
cls.register(
method,
uri,
response,
match_querystring=match_querystring,
)