568 lines
20 KiB
Python
568 lines
20 KiB
Python
import urllib
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import sys
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import os
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import re
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import mimetypes
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import warnings
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from copy import copy
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from urlparse import urlparse, urlsplit
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try:
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from cStringIO import StringIO
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except ImportError:
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from StringIO import StringIO
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from django.conf import settings
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from django.contrib.auth import authenticate, login
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from django.core.handlers.base import BaseHandler
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from django.core.handlers.wsgi import WSGIRequest
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from django.core.signals import got_request_exception
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from django.http import SimpleCookie, HttpRequest, QueryDict
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from django.template import TemplateDoesNotExist
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from django.test import signals
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from django.utils.functional import curry
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from django.utils.encoding import smart_str
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from django.utils.http import urlencode
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from django.utils.importlib import import_module
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from django.utils.itercompat import is_iterable
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from django.db import close_connection
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from django.test.utils import ContextList
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__all__ = ('Client', 'RequestFactory', 'encode_file', 'encode_multipart')
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BOUNDARY = 'BoUnDaRyStRiNg'
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MULTIPART_CONTENT = 'multipart/form-data; boundary=%s' % BOUNDARY
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CONTENT_TYPE_RE = re.compile('.*; charset=([\w\d-]+);?')
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class FakePayload(object):
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"""
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A wrapper around StringIO that restricts what can be read since data from
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the network can't be seeked and cannot be read outside of its content
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length. This makes sure that views can't do anything under the test client
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that wouldn't work in Real Life.
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"""
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def __init__(self, content):
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self.__content = StringIO(content)
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self.__len = len(content)
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def read(self, num_bytes=None):
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if num_bytes is None:
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num_bytes = self.__len or 0
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assert self.__len >= num_bytes, "Cannot read more than the available bytes from the HTTP incoming data."
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content = self.__content.read(num_bytes)
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self.__len -= num_bytes
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return content
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class ClientHandler(BaseHandler):
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"""
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A HTTP Handler that can be used for testing purposes.
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Uses the WSGI interface to compose requests, but returns
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the raw HttpResponse object
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"""
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def __init__(self, enforce_csrf_checks=True, *args, **kwargs):
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self.enforce_csrf_checks = enforce_csrf_checks
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super(ClientHandler, self).__init__(*args, **kwargs)
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def __call__(self, environ):
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from django.conf import settings
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from django.core import signals
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# Set up middleware if needed. We couldn't do this earlier, because
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# settings weren't available.
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if self._request_middleware is None:
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self.load_middleware()
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signals.request_started.send(sender=self.__class__)
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try:
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request = WSGIRequest(environ)
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# sneaky little hack so that we can easily get round
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# CsrfViewMiddleware. This makes life easier, and is probably
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# required for backwards compatibility with external tests against
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# admin views.
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request._dont_enforce_csrf_checks = not self.enforce_csrf_checks
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response = self.get_response(request)
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finally:
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signals.request_finished.disconnect(close_connection)
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signals.request_finished.send(sender=self.__class__)
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signals.request_finished.connect(close_connection)
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return response
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def store_rendered_templates(store, signal, sender, template, context, **kwargs):
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"""
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Stores templates and contexts that are rendered.
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The context is copied so that it is an accurate representation at the time
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of rendering.
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"""
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store.setdefault('templates', []).append(template)
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store.setdefault('context', ContextList()).append(copy(context))
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def encode_multipart(boundary, data):
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"""
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Encodes multipart POST data from a dictionary of form values.
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The key will be used as the form data name; the value will be transmitted
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as content. If the value is a file, the contents of the file will be sent
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as an application/octet-stream; otherwise, str(value) will be sent.
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"""
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lines = []
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to_str = lambda s: smart_str(s, settings.DEFAULT_CHARSET)
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# Not by any means perfect, but good enough for our purposes.
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is_file = lambda thing: hasattr(thing, "read") and callable(thing.read)
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# Each bit of the multipart form data could be either a form value or a
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# file, or a *list* of form values and/or files. Remember that HTTP field
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# names can be duplicated!
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for (key, value) in data.items():
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if is_file(value):
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lines.extend(encode_file(boundary, key, value))
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elif not isinstance(value, basestring) and is_iterable(value):
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for item in value:
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if is_file(item):
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lines.extend(encode_file(boundary, key, item))
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else:
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lines.extend([
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'--' + boundary,
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'Content-Disposition: form-data; name="%s"' % to_str(key),
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'',
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to_str(item)
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])
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else:
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lines.extend([
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'--' + boundary,
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'Content-Disposition: form-data; name="%s"' % to_str(key),
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'',
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to_str(value)
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])
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lines.extend([
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'--' + boundary + '--',
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'',
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])
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return '\r\n'.join(lines)
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def encode_file(boundary, key, file):
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to_str = lambda s: smart_str(s, settings.DEFAULT_CHARSET)
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content_type = mimetypes.guess_type(file.name)[0]
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if content_type is None:
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content_type = 'application/octet-stream'
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return [
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'--' + boundary,
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'Content-Disposition: form-data; name="%s"; filename="%s"' \
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% (to_str(key), to_str(os.path.basename(file.name))),
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'Content-Type: %s' % content_type,
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'',
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file.read()
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]
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class RequestFactory(object):
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"""
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Class that lets you create mock Request objects for use in testing.
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Usage:
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rf = RequestFactory()
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get_request = rf.get('/hello/')
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post_request = rf.post('/submit/', {'foo': 'bar'})
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Once you have a request object you can pass it to any view function,
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just as if that view had been hooked up using a URLconf.
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"""
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def __init__(self, **defaults):
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self.defaults = defaults
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self.cookies = SimpleCookie()
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self.errors = StringIO()
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def _base_environ(self, **request):
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"""
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The base environment for a request.
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"""
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environ = {
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'HTTP_COOKIE': self.cookies.output(header='', sep='; '),
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'PATH_INFO': '/',
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'QUERY_STRING': '',
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'REMOTE_ADDR': '127.0.0.1',
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'REQUEST_METHOD': 'GET',
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'SCRIPT_NAME': '',
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'SERVER_NAME': 'testserver',
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'SERVER_PORT': '80',
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'SERVER_PROTOCOL': 'HTTP/1.1',
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'wsgi.version': (1,0),
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'wsgi.url_scheme': 'http',
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'wsgi.errors': self.errors,
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'wsgi.multiprocess': True,
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'wsgi.multithread': False,
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'wsgi.run_once': False,
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}
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environ.update(self.defaults)
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environ.update(request)
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return environ
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def request(self, **request):
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"Construct a generic request object."
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return WSGIRequest(self._base_environ(**request))
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def _encode_data(self, data, content_type, ):
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if content_type is MULTIPART_CONTENT:
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return encode_multipart(BOUNDARY, data)
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else:
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# Encode the content so that the byte representation is correct.
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match = CONTENT_TYPE_RE.match(content_type)
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if match:
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charset = match.group(1)
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else:
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charset = settings.DEFAULT_CHARSET
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return smart_str(data, encoding=charset)
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def _get_path(self, parsed):
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# If there are parameters, add them
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if parsed[3]:
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return urllib.unquote(parsed[2] + ";" + parsed[3])
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else:
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return urllib.unquote(parsed[2])
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def get(self, path, data={}, **extra):
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"Construct a GET request"
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parsed = urlparse(path)
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r = {
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'CONTENT_TYPE': 'text/html; charset=utf-8',
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'PATH_INFO': self._get_path(parsed),
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'QUERY_STRING': urlencode(data, doseq=True) or parsed[4],
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'REQUEST_METHOD': 'GET',
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'wsgi.input': FakePayload('')
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}
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r.update(extra)
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return self.request(**r)
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def post(self, path, data={}, content_type=MULTIPART_CONTENT,
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**extra):
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"Construct a POST request."
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post_data = self._encode_data(data, content_type)
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parsed = urlparse(path)
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r = {
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'CONTENT_LENGTH': len(post_data),
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'CONTENT_TYPE': content_type,
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'PATH_INFO': self._get_path(parsed),
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'QUERY_STRING': parsed[4],
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'REQUEST_METHOD': 'POST',
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'wsgi.input': FakePayload(post_data),
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}
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r.update(extra)
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return self.request(**r)
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def head(self, path, data={}, **extra):
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"Construct a HEAD request."
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parsed = urlparse(path)
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r = {
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'CONTENT_TYPE': 'text/html; charset=utf-8',
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'PATH_INFO': self._get_path(parsed),
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'QUERY_STRING': urlencode(data, doseq=True) or parsed[4],
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'REQUEST_METHOD': 'HEAD',
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'wsgi.input': FakePayload('')
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}
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r.update(extra)
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return self.request(**r)
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def options(self, path, data={}, **extra):
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"Constrict an OPTIONS request"
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parsed = urlparse(path)
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r = {
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'PATH_INFO': self._get_path(parsed),
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'QUERY_STRING': urlencode(data, doseq=True) or parsed[4],
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'REQUEST_METHOD': 'OPTIONS',
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'wsgi.input': FakePayload('')
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}
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r.update(extra)
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return self.request(**r)
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def put(self, path, data={}, content_type=MULTIPART_CONTENT,
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**extra):
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"Construct a PUT request."
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put_data = self._encode_data(data, content_type)
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parsed = urlparse(path)
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r = {
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'CONTENT_LENGTH': len(put_data),
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'CONTENT_TYPE': content_type,
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'PATH_INFO': self._get_path(parsed),
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'QUERY_STRING': parsed[4],
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'REQUEST_METHOD': 'PUT',
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'wsgi.input': FakePayload(put_data),
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}
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r.update(extra)
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return self.request(**r)
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def delete(self, path, data={}, **extra):
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"Construct a DELETE request."
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parsed = urlparse(path)
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r = {
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'PATH_INFO': self._get_path(parsed),
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'QUERY_STRING': urlencode(data, doseq=True) or parsed[4],
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'REQUEST_METHOD': 'DELETE',
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'wsgi.input': FakePayload('')
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}
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r.update(extra)
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return self.request(**r)
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class Client(RequestFactory):
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"""
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A class that can act as a client for testing purposes.
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It allows the user to compose GET and POST requests, and
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obtain the response that the server gave to those requests.
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The server Response objects are annotated with the details
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of the contexts and templates that were rendered during the
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process of serving the request.
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Client objects are stateful - they will retain cookie (and
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thus session) details for the lifetime of the Client instance.
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This is not intended as a replacement for Twill/Selenium or
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the like - it is here to allow testing against the
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contexts and templates produced by a view, rather than the
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HTML rendered to the end-user.
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"""
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def __init__(self, enforce_csrf_checks=False, **defaults):
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super(Client, self).__init__(**defaults)
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self.handler = ClientHandler(enforce_csrf_checks)
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self.exc_info = None
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def store_exc_info(self, **kwargs):
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"""
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Stores exceptions when they are generated by a view.
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"""
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self.exc_info = sys.exc_info()
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def _session(self):
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"""
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Obtains the current session variables.
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"""
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if 'django.contrib.sessions.middleware.SessionMiddleware' in settings.MIDDLEWARE_CLASSES:
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engine = import_module(settings.SESSION_ENGINE)
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cookie = self.cookies.get(settings.SESSION_COOKIE_NAME, None)
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if cookie:
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return engine.SessionStore(cookie.value)
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return {}
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session = property(_session)
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def request(self, **request):
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"""
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The master request method. Composes the environment dictionary
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and passes to the handler, returning the result of the handler.
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Assumes defaults for the query environment, which can be overridden
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using the arguments to the request.
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"""
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environ = self._base_environ(**request)
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# Curry a data dictionary into an instance of the template renderer
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# callback function.
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data = {}
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on_template_render = curry(store_rendered_templates, data)
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signals.template_rendered.connect(on_template_render, dispatch_uid="template-render")
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# Capture exceptions created by the handler.
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got_request_exception.connect(self.store_exc_info, dispatch_uid="request-exception")
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try:
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try:
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response = self.handler(environ)
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except TemplateDoesNotExist, e:
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# If the view raises an exception, Django will attempt to show
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# the 500.html template. If that template is not available,
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# we should ignore the error in favor of re-raising the
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# underlying exception that caused the 500 error. Any other
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# template found to be missing during view error handling
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# should be reported as-is.
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if e.args != ('500.html',):
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raise
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# Look for a signalled exception, clear the current context
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# exception data, then re-raise the signalled exception.
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# Also make sure that the signalled exception is cleared from
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# the local cache!
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if self.exc_info:
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exc_info = self.exc_info
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self.exc_info = None
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raise exc_info[1], None, exc_info[2]
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# Save the client and request that stimulated the response.
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response.client = self
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response.request = request
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# Add any rendered template detail to the response.
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response.templates = data.get("templates", [])
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response.context = data.get("context")
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# Flatten a single context. Not really necessary anymore thanks to
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# the __getattr__ flattening in ContextList, but has some edge-case
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# backwards-compatibility implications.
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if response.context and len(response.context) == 1:
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response.context = response.context[0]
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# Provide a backwards-compatible (but pending deprecation) response.template
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def _get_template(self):
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warnings.warn("response.template is deprecated; use response.templates instead (which is always a list)",
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DeprecationWarning, stacklevel=2)
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if not self.templates:
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return None
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elif len(self.templates) == 1:
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return self.templates[0]
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return self.templates
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response.__class__.template = property(_get_template)
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# Update persistent cookie data.
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if response.cookies:
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self.cookies.update(response.cookies)
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return response
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finally:
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signals.template_rendered.disconnect(dispatch_uid="template-render")
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got_request_exception.disconnect(dispatch_uid="request-exception")
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def get(self, path, data={}, follow=False, **extra):
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"""
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Requests a response from the server using GET.
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"""
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response = super(Client, self).get(path, data=data, **extra)
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if follow:
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response = self._handle_redirects(response, **extra)
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return response
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def post(self, path, data={}, content_type=MULTIPART_CONTENT,
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follow=False, **extra):
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"""
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Requests a response from the server using POST.
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"""
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response = super(Client, self).post(path, data=data, content_type=content_type, **extra)
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if follow:
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response = self._handle_redirects(response, **extra)
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return response
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def head(self, path, data={}, follow=False, **extra):
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"""
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Request a response from the server using HEAD.
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"""
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response = super(Client, self).head(path, data=data, **extra)
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if follow:
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response = self._handle_redirects(response, **extra)
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return response
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def options(self, path, data={}, follow=False, **extra):
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"""
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Request a response from the server using OPTIONS.
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"""
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response = super(Client, self).options(path, data=data, **extra)
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if follow:
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response = self._handle_redirects(response, **extra)
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return response
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def put(self, path, data={}, content_type=MULTIPART_CONTENT,
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follow=False, **extra):
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"""
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Send a resource to the server using PUT.
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"""
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response = super(Client, self).put(path, data=data, content_type=content_type, **extra)
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if follow:
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response = self._handle_redirects(response, **extra)
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return response
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def delete(self, path, data={}, follow=False, **extra):
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"""
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Send a DELETE request to the server.
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"""
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response = super(Client, self).delete(path, data=data, **extra)
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if follow:
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response = self._handle_redirects(response, **extra)
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return response
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def login(self, **credentials):
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"""
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Sets the Factory to appear as if it has successfully logged into a site.
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Returns True if login is possible; False if the provided credentials
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are incorrect, or the user is inactive, or if the sessions framework is
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not available.
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"""
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user = authenticate(**credentials)
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if user and user.is_active \
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and 'django.contrib.sessions.middleware.SessionMiddleware' in settings.MIDDLEWARE_CLASSES:
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engine = import_module(settings.SESSION_ENGINE)
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# Create a fake request to store login details.
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request = HttpRequest()
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if self.session:
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request.session = self.session
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else:
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request.session = engine.SessionStore()
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login(request, user)
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# Save the session values.
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request.session.save()
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# Set the cookie to represent the session.
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session_cookie = settings.SESSION_COOKIE_NAME
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self.cookies[session_cookie] = request.session.session_key
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cookie_data = {
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'max-age': None,
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'path': '/',
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|
'domain': settings.SESSION_COOKIE_DOMAIN,
|
|
'secure': settings.SESSION_COOKIE_SECURE or None,
|
|
'expires': None,
|
|
}
|
|
self.cookies[session_cookie].update(cookie_data)
|
|
|
|
return True
|
|
else:
|
|
return False
|
|
|
|
def logout(self):
|
|
"""
|
|
Removes the authenticated user's cookies and session object.
|
|
|
|
Causes the authenticated user to be logged out.
|
|
"""
|
|
session = import_module(settings.SESSION_ENGINE).SessionStore()
|
|
session_cookie = self.cookies.get(settings.SESSION_COOKIE_NAME)
|
|
if session_cookie:
|
|
session.delete(session_key=session_cookie.value)
|
|
self.cookies = SimpleCookie()
|
|
|
|
def _handle_redirects(self, response, **extra):
|
|
"Follows any redirects by requesting responses from the server using GET."
|
|
|
|
response.redirect_chain = []
|
|
while response.status_code in (301, 302, 303, 307):
|
|
url = response['Location']
|
|
scheme, netloc, path, query, fragment = urlsplit(url)
|
|
|
|
redirect_chain = response.redirect_chain
|
|
redirect_chain.append((url, response.status_code))
|
|
|
|
if scheme:
|
|
extra['wsgi.url_scheme'] = scheme
|
|
|
|
# The test client doesn't handle external links,
|
|
# but since the situation is simulated in test_client,
|
|
# we fake things here by ignoring the netloc portion of the
|
|
# redirected URL.
|
|
response = self.get(path, QueryDict(query), follow=False, **extra)
|
|
response.redirect_chain = redirect_chain
|
|
|
|
# Prevent loops
|
|
if response.redirect_chain[-1] in response.redirect_chain[0:-1]:
|
|
break
|
|
return response
|