890a4fe9ff
When you register a handler the type for text or data can be a string or a callback that provides a string. By the time you get to create_response this callback should have been called and only a string can be passed. This check originally would have been in place for when a callback was run and the return value was not the expected type, however create_response is a public function that can be used on its own. Correct the exception to clarify in create_response you must pass a string or bytes and not a callback. Change-Id: I3e700afddc1f40454f69a564066495bfc77d91c8 Closes-Bug: #1627506
248 lines
9.7 KiB
Python
248 lines
9.7 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import json as jsonutils
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from requests.adapters import HTTPAdapter
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from requests.cookies import MockRequest, MockResponse
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from requests.cookies import RequestsCookieJar
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from requests.cookies import merge_cookies, cookiejar_from_dict
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from requests.packages.urllib3.response import HTTPResponse
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import six
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from requests_mock import compat
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from requests_mock import exceptions
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_BODY_ARGS = frozenset(['raw', 'body', 'content', 'text', 'json'])
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_HTTP_ARGS = frozenset(['status_code', 'reason', 'headers', 'cookies'])
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_DEFAULT_STATUS = 200
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_http_adapter = HTTPAdapter()
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class CookieJar(RequestsCookieJar):
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def set(self, name, value, **kwargs):
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"""Add a cookie to the Jar.
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:param str name: cookie name/key.
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:param str value: cookie value.
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:param int version: Integer or None. Netscape cookies have version 0.
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RFC 2965 and RFC 2109 cookies have a version cookie-attribute of 1.
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However, note that cookielib may 'downgrade' RFC 2109 cookies to
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Netscape cookies, in which case version is 0.
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:param str port: String representing a port or a set of ports
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(eg. '80', or '80,8080'),
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:param str domain: The domain the cookie should apply to.
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:param str path: Cookie path (a string, eg. '/acme/rocket_launchers').
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:param bool secure: True if cookie should only be returned over a
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secure connection.
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:param int expires: Integer expiry date in seconds since epoch or None.
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:param bool discard: True if this is a session cookie.
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:param str comment: String comment from the server explaining the
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function of this cookie.
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:param str comment_url: URL linking to a comment from the server
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explaining the function of this cookie.
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"""
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# just here to provide the function documentation
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return super(CookieJar, self).set(name, value, **kwargs)
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def _check_body_arguments(**kwargs):
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# mutual exclusion, only 1 body method may be provided
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provided = [x for x in _BODY_ARGS if kwargs.pop(x, None) is not None]
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if len(provided) > 1:
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raise RuntimeError('You may only supply one body element. You '
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'supplied %s' % ', '.join(provided))
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extra = [x for x in kwargs if x not in _HTTP_ARGS]
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if extra:
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raise TypeError('Too many arguments provided. Unexpected '
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'arguments %s.' % ', '.join(extra))
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class _FakeConnection(object):
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"""An object that can mock the necessary parts of a socket interface."""
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def send(self, request, **kwargs):
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msg = 'This response was created without a connection. You are ' \
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'therefore unable to make a request directly on that connection.'
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raise exceptions.InvalidRequest(msg)
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def close(self):
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pass
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def _extract_cookies(request, response, cookies):
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"""Add cookies to the response.
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Cookies in requests are extracted from the headers in the original_response
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httplib.HTTPMessage which we don't create so we have to do this step
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manually.
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"""
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# This will add cookies set manually via the Set-Cookie or Set-Cookie2
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# header but this only allows 1 cookie to be set.
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http_message = compat._FakeHTTPMessage(response.headers)
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response.cookies.extract_cookies(MockResponse(http_message),
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MockRequest(request))
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# This allows you to pass either a CookieJar or a dictionary to request_uri
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# or directly to create_response. To allow more than one cookie to be set.
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if cookies:
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merge_cookies(response.cookies, cookies)
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class _IOReader(six.BytesIO):
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"""A reader that makes a BytesIO look like a HTTPResponse.
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A HTTPResponse will return an empty string when you read from it after
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the socket has been closed. A BytesIO will raise a ValueError. For
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compatibility we want to do the same thing a HTTPResponse does.
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"""
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def read(self, *args, **kwargs):
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if self.closed:
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return six.b('')
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# not a new style object in python 2
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return six.BytesIO.read(self, *args, **kwargs)
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def create_response(request, **kwargs):
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"""
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:param int status_code: The status code to return upon a successful
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match. Defaults to 200.
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:param HTTPResponse raw: A HTTPResponse object to return upon a
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successful match.
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:param io.IOBase body: An IO object with a read() method that can
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return a body on successful match.
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:param bytes content: A byte string to return upon a successful match.
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:param unicode text: A text string to return upon a successful match.
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:param object json: A python object to be converted to a JSON string
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and returned upon a successful match.
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:param dict headers: A dictionary object containing headers that are
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returned upon a successful match.
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:param CookieJar cookies: A cookie jar with cookies to set on the
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response.
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"""
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connection = kwargs.pop('connection', _FakeConnection())
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_check_body_arguments(**kwargs)
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raw = kwargs.pop('raw', None)
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body = kwargs.pop('body', None)
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content = kwargs.pop('content', None)
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text = kwargs.pop('text', None)
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json = kwargs.pop('json', None)
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encoding = None
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if content and not isinstance(content, six.binary_type):
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raise TypeError('Content should be binary data')
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if text and not isinstance(text, six.string_types):
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raise TypeError('Text should be string data')
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if json is not None:
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text = jsonutils.dumps(json)
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if text is not None:
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encoding = 'utf-8'
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content = text.encode(encoding)
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if content is not None:
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body = _IOReader(content)
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if not raw:
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raw = HTTPResponse(status=kwargs.get('status_code', _DEFAULT_STATUS),
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headers=kwargs.get('headers', {}),
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reason=kwargs.get('reason'),
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body=body or _IOReader(six.b('')),
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decode_content=False,
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preload_content=False,
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original_response=compat._fake_http_response)
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response = _http_adapter.build_response(request, raw)
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response.connection = connection
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response.encoding = encoding
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_extract_cookies(request, response, kwargs.get('cookies'))
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return response
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class _Context(object):
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"""Stores the data being used to process a current URL match."""
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def __init__(self, headers, status_code, reason, cookies):
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self.headers = headers
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self.status_code = status_code
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self.reason = reason
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self.cookies = cookies
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class _MatcherResponse(object):
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def __init__(self, **kwargs):
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self._exc = kwargs.pop('exc', None)
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# If the user is asking for an exception to be thrown then prevent them
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# specifying any sort of body or status response as it won't be used.
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# This may be protecting the user too much but can be removed later.
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if self._exc and kwargs:
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raise TypeError('Cannot provide other arguments with exc.')
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_check_body_arguments(**kwargs)
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self._params = kwargs
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# whilst in general you shouldn't do type checking in python this
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# makes sure we don't end up with differences between the way types
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# are handled between python 2 and 3.
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content = self._params.get('content')
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text = self._params.get('text')
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if content and not (callable(content) or
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isinstance(content, six.binary_type)):
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raise TypeError('Content should be a callback or binary data')
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if text and not (callable(text) or
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isinstance(text, six.string_types)):
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raise TypeError('Text should be a callback or string data')
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def get_response(self, request):
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# if an error was requested then raise that instead of doing response
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if self._exc:
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raise self._exc
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# If a cookie dict is passed convert it into a CookieJar so that the
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# cookies object available in a callback context is always a jar.
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cookies = self._params.get('cookies', CookieJar())
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if isinstance(cookies, dict):
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cookies = cookiejar_from_dict(cookies, CookieJar())
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context = _Context(self._params.get('headers', {}).copy(),
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self._params.get('status_code', _DEFAULT_STATUS),
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self._params.get('reason'),
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cookies)
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# if a body element is a callback then execute it
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def _call(f, *args, **kwargs):
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return f(request, context, *args, **kwargs) if callable(f) else f
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return create_response(request,
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json=_call(self._params.get('json')),
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text=_call(self._params.get('text')),
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content=_call(self._params.get('content')),
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body=_call(self._params.get('body')),
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raw=self._params.get('raw'),
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status_code=context.status_code,
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reason=context.reason,
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headers=context.headers,
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cookies=context.cookies)
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