Source code for django.test.client

import json
import mimetypes
import os
import sys
from copy import copy
from functools import partial
from http import HTTPStatus
from importlib import import_module
from io import BytesIO
from urllib.parse import unquote_to_bytes, urljoin, urlparse, urlsplit

from asgiref.sync import sync_to_async

from django.conf import settings
from django.core.handlers.asgi import ASGIRequest
from django.core.handlers.base import BaseHandler
from django.core.handlers.wsgi import WSGIRequest
from django.core.serializers.json import DjangoJSONEncoder
from django.core.signals import (
    got_request_exception, request_finished, request_started,
)
from django.db import close_old_connections
from django.http import HttpRequest, QueryDict, SimpleCookie
from django.test import signals
from django.test.utils import ContextList
from django.urls import resolve
from django.utils.encoding import force_bytes
from django.utils.functional import SimpleLazyObject
from django.utils.http import urlencode
from django.utils.itercompat import is_iterable
from django.utils.regex_helper import _lazy_re_compile

__all__ = (
    'AsyncClient', 'AsyncRequestFactory', 'Client', 'RedirectCycleError',
    'RequestFactory', 'encode_file', 'encode_multipart',
)


BOUNDARY = 'BoUnDaRyStRiNg'
MULTIPART_CONTENT = 'multipart/form-data; boundary=%s' % BOUNDARY
CONTENT_TYPE_RE = _lazy_re_compile(r'.*; charset=([\w\d-]+);?')
# Structured suffix spec: https://tools.ietf.org/html/rfc6838#section-4.2.8
JSON_CONTENT_TYPE_RE = _lazy_re_compile(r'^application\/(.+\+)?json')


class RedirectCycleError(Exception):
    """The test client has been asked to follow a redirect loop."""
    def __init__(self, message, last_response):
        super().__init__(message)
        self.last_response = last_response
        self.redirect_chain = last_response.redirect_chain


class FakePayload:
    """
    A wrapper around BytesIO that restricts what can be read since data from
    the network can't be sought and cannot be read outside of its content
    length. This makes sure that views can't do anything under the test client
    that wouldn't work in real life.
    """
    def __init__(self, content=None):
        self.__content = BytesIO()
        self.__len = 0
        self.read_started = False
        if content is not None:
            self.write(content)

    def __len__(self):
        return self.__len

    def read(self, num_bytes=None):
        if not self.read_started:
            self.__content.seek(0)
            self.read_started = True
        if num_bytes is None:
            num_bytes = self.__len or 0
        assert self.__len >= num_bytes, "Cannot read more than the available bytes from the HTTP incoming data."
        content = self.__content.read(num_bytes)
        self.__len -= num_bytes
        return content

    def write(self, content):
        if self.read_started:
            raise ValueError("Unable to write a payload after it's been read")
        content = force_bytes(content)
        self.__content.write(content)
        self.__len += len(content)


def closing_iterator_wrapper(iterable, close):
    try:
        yield from iterable
    finally:
        request_finished.disconnect(close_old_connections)
        close()                                 # will fire request_finished
        request_finished.connect(close_old_connections)


def conditional_content_removal(request, response):
    """
    Simulate the behavior of most Web servers by removing the content of
    responses for HEAD requests, 1xx, 204, and 304 responses. Ensure
    compliance with RFC 7230, section 3.3.3.
    """
    if 100 <= response.status_code < 200 or response.status_code in (204, 304):
        if response.streaming:
            response.streaming_content = []
        else:
            response.content = b''
    if request.method == 'HEAD':
        if response.streaming:
            response.streaming_content = []
        else:
            response.content = b''
    return response


class ClientHandler(BaseHandler):
    """
    A HTTP Handler that can be used for testing purposes. Use the WSGI
    interface to compose requests, but return the raw HttpResponse object with
    the originating WSGIRequest attached to its ``wsgi_request`` attribute.
    """
    def __init__(self, enforce_csrf_checks=True, *args, **kwargs):
        self.enforce_csrf_checks = enforce_csrf_checks
        super().__init__(*args, **kwargs)

    def __call__(self, environ):
        # Set up middleware if needed. We couldn't do this earlier, because
        # settings weren't available.
        if self._middleware_chain is None:
            self.load_middleware()

        request_started.disconnect(close_old_connections)
        request_started.send(sender=self.__class__, environ=environ)
        request_started.connect(close_old_connections)
        request = WSGIRequest(environ)
        # sneaky little hack so that we can easily get round
        # CsrfViewMiddleware.  This makes life easier, and is probably
        # required for backwards compatibility with external tests against
        # admin views.
        request._dont_enforce_csrf_checks = not self.enforce_csrf_checks

        # Request goes through middleware.
        response = self.get_response(request)

        # Simulate behaviors of most Web servers.
        conditional_content_removal(request, response)

        # Attach the originating request to the response so that it could be
        # later retrieved.
        response.wsgi_request = request

        # Emulate a WSGI server by calling the close method on completion.
        if response.streaming:
            response.streaming_content = closing_iterator_wrapper(
                response.streaming_content, response.close)
        else:
            request_finished.disconnect(close_old_connections)
            response.close()                    # will fire request_finished
            request_finished.connect(close_old_connections)

        return response


class AsyncClientHandler(BaseHandler):
    """An async version of ClientHandler."""
    def __init__(self, enforce_csrf_checks=True, *args, **kwargs):
        self.enforce_csrf_checks = enforce_csrf_checks
        super().__init__(*args, **kwargs)

    async def __call__(self, scope):
        # Set up middleware if needed. We couldn't do this earlier, because
        # settings weren't available.
        if self._middleware_chain is None:
            self.load_middleware(is_async=True)
        # Extract body file from the scope, if provided.
        if '_body_file' in scope:
            body_file = scope.pop('_body_file')
        else:
            body_file = FakePayload('')

        request_started.disconnect(close_old_connections)
        await sync_to_async(request_started.send, thread_sensitive=False)(sender=self.__class__, scope=scope)
        request_started.connect(close_old_connections)
        request = ASGIRequest(scope, body_file)
        # Sneaky little hack so that we can easily get round
        # CsrfViewMiddleware. This makes life easier, and is probably required
        # for backwards compatibility with external tests against admin views.
        request._dont_enforce_csrf_checks = not self.enforce_csrf_checks
        # Request goes through middleware.
        response = await self.get_response_async(request)
        # Simulate behaviors of most Web servers.
        conditional_content_removal(request, response)
        # Attach the originating ASGI request to the response so that it could
        # be later retrieved.
        response.asgi_request = request
        # Emulate a server by calling the close method on completion.
        if response.streaming:
            response.streaming_content = await sync_to_async(closing_iterator_wrapper, thread_sensitive=False)(
                response.streaming_content,
                response.close,
            )
        else:
            request_finished.disconnect(close_old_connections)
            # Will fire request_finished.
            await sync_to_async(response.close, thread_sensitive=False)()
            request_finished.connect(close_old_connections)
        return response


def store_rendered_templates(store, signal, sender, template, context, **kwargs):
    """
    Store templates and contexts that are rendered.

    The context is copied so that it is an accurate representation at the time
    of rendering.
    """
    store.setdefault('templates', []).append(template)
    if 'context' not in store:
        store['context'] = ContextList()
    store['context'].append(copy(context))


def encode_multipart(boundary, data):
    """
    Encode multipart POST data from a dictionary of form values.

    The key will be used as the form data name; the value will be transmitted
    as content. If the value is a file, the contents of the file will be sent
    as an application/octet-stream; otherwise, str(value) will be sent.
    """
    lines = []

    def to_bytes(s):
        return force_bytes(s, settings.DEFAULT_CHARSET)

    # Not by any means perfect, but good enough for our purposes.
    def is_file(thing):
        return hasattr(thing, "read") and callable(thing.read)

    # Each bit of the multipart form data could be either a form value or a
    # file, or a *list* of form values and/or files. Remember that HTTP field
    # names can be duplicated!
    for (key, value) in data.items():
        if value is None:
            raise TypeError(
                "Cannot encode None for key '%s' as POST data. Did you mean "
                "to pass an empty string or omit the value?" % key
            )
        elif is_file(value):
            lines.extend(encode_file(boundary, key, value))
        elif not isinstance(value, str) and is_iterable(value):
            for item in value:
                if is_file(item):
                    lines.extend(encode_file(boundary, key, item))
                else:
                    lines.extend(to_bytes(val) for val in [
                        '--%s' % boundary,
                        'Content-Disposition: form-data; name="%s"' % key,
                        '',
                        item
                    ])
        else:
            lines.extend(to_bytes(val) for val in [
                '--%s' % boundary,
                'Content-Disposition: form-data; name="%s"' % key,
                '',
                value
            ])

    lines.extend([
        to_bytes('--%s--' % boundary),
        b'',
    ])
    return b'\r\n'.join(lines)


def encode_file(boundary, key, file):
    def to_bytes(s):
        return force_bytes(s, settings.DEFAULT_CHARSET)

    # file.name might not be a string. For example, it's an int for
    # tempfile.TemporaryFile().
    file_has_string_name = hasattr(file, 'name') and isinstance(file.name, str)
    filename = os.path.basename(file.name) if file_has_string_name else ''

    if hasattr(file, 'content_type'):
        content_type = file.content_type
    elif filename:
        content_type = mimetypes.guess_type(filename)[0]
    else:
        content_type = None

    if content_type is None:
        content_type = 'application/octet-stream'
    filename = filename or key
    return [
        to_bytes('--%s' % boundary),
        to_bytes('Content-Disposition: form-data; name="%s"; filename="%s"'
                 % (key, filename)),
        to_bytes('Content-Type: %s' % content_type),
        b'',
        to_bytes(file.read())
    ]


[docs]class RequestFactory: """ Class that lets you create mock Request objects for use in testing. Usage: rf = RequestFactory() get_request = rf.get('/hello/') post_request = rf.post('/submit/', {'foo': 'bar'}) Once you have a request object you can pass it to any view function, just as if that view had been hooked up using a URLconf. """ def __init__(self, *, json_encoder=DjangoJSONEncoder, **defaults): self.json_encoder = json_encoder self.defaults = defaults self.cookies = SimpleCookie() self.errors = BytesIO() def _base_environ(self, **request): """ The base environment for a request. """ # This is a minimal valid WSGI environ dictionary, plus: # - HTTP_COOKIE: for cookie support, # - REMOTE_ADDR: often useful, see #8551. # See https://www.python.org/dev/peps/pep-3333/#environ-variables return { 'HTTP_COOKIE': '; '.join(sorted( '%s=%s' % (morsel.key, morsel.coded_value) for morsel in self.cookies.values() )), 'PATH_INFO': '/', 'REMOTE_ADDR': '127.0.0.1', 'REQUEST_METHOD': 'GET', 'SCRIPT_NAME': '', 'SERVER_NAME': 'testserver', 'SERVER_PORT': '80', 'SERVER_PROTOCOL': 'HTTP/1.1', 'wsgi.version': (1, 0), 'wsgi.url_scheme': 'http', 'wsgi.input': FakePayload(b''), 'wsgi.errors': self.errors, 'wsgi.multiprocess': True, 'wsgi.multithread': False, 'wsgi.run_once': False, **self.defaults, **request, } def request(self, **request): "Construct a generic request object." return WSGIRequest(self._base_environ(**request)) def _encode_data(self, data, content_type): if content_type is MULTIPART_CONTENT: return encode_multipart(BOUNDARY, data) else: # Encode the content so that the byte representation is correct. match = CONTENT_TYPE_RE.match(content_type) if match: charset = match[1] else: charset = settings.DEFAULT_CHARSET return force_bytes(data, encoding=charset) def _encode_json(self, data, content_type): """ Return encoded JSON if data is a dict, list, or tuple and content_type is application/json. """ should_encode = JSON_CONTENT_TYPE_RE.match(content_type) and isinstance(data, (dict, list, tuple)) return json.dumps(data, cls=self.json_encoder) if should_encode else data def _get_path(self, parsed): path = parsed.path # If there are parameters, add them if parsed.params: path += ";" + parsed.params path = unquote_to_bytes(path) # Replace the behavior where non-ASCII values in the WSGI environ are # arbitrarily decoded with ISO-8859-1. # Refs comment in `get_bytes_from_wsgi()`. return path.decode('iso-8859-1') def get(self, path, data=None, secure=False, **extra): """Construct a GET request.""" data = {} if data is None else data return self.generic('GET', path, secure=secure, **{ 'QUERY_STRING': urlencode(data, doseq=True), **extra, }) def post(self, path, data=None, content_type=MULTIPART_CONTENT, secure=False, **extra): """Construct a POST request.""" data = self._encode_json({} if data is None else data, content_type) post_data = self._encode_data(data, content_type) return self.generic('POST', path, post_data, content_type, secure=secure, **extra) def head(self, path, data=None, secure=False, **extra): """Construct a HEAD request.""" data = {} if data is None else data return self.generic('HEAD', path, secure=secure, **{ 'QUERY_STRING': urlencode(data, doseq=True), **extra, }) def trace(self, path, secure=False, **extra): """Construct a TRACE request.""" return self.generic('TRACE', path, secure=secure, **extra) def options(self, path, data='', content_type='application/octet-stream', secure=False, **extra): "Construct an OPTIONS request." return self.generic('OPTIONS', path, data, content_type, secure=secure, **extra) def put(self, path, data='', content_type='application/octet-stream', secure=False, **extra): """Construct a PUT request.""" data = self._encode_json(data, content_type) return self.generic('PUT', path, data, content_type, secure=secure, **extra) def patch(self, path, data='', content_type='application/octet-stream', secure=False, **extra): """Construct a PATCH request.""" data = self._encode_json(data, content_type) return self.generic('PATCH', path, data, content_type, secure=secure, **extra) def delete(self, path, data='', content_type='application/octet-stream', secure=False, **extra): """Construct a DELETE request.""" data = self._encode_json(data, content_type) return self.generic('DELETE', path, data, content_type, secure=secure, **extra) def generic(self, method, path, data='', content_type='application/octet-stream', secure=False, **extra): """Construct an arbitrary HTTP request.""" parsed = urlparse(str(path)) # path can be lazy data = force_bytes(data, settings.DEFAULT_CHARSET) r = { 'PATH_INFO': self._get_path(parsed), 'REQUEST_METHOD': method, 'SERVER_PORT': '443' if secure else '80', 'wsgi.url_scheme': 'https' if secure else 'http', } if data: r.update({ 'CONTENT_LENGTH': str(len(data)), 'CONTENT_TYPE': content_type, 'wsgi.input': FakePayload(data), }) r.update(extra) # If QUERY_STRING is absent or empty, we want to extract it from the URL. if not r.get('QUERY_STRING'): # WSGI requires latin-1 encoded strings. See get_path_info(). query_string = parsed[4].encode().decode('iso-8859-1') r['QUERY_STRING'] = query_string return self.request(**r)
class AsyncRequestFactory(RequestFactory): """ Class that lets you create mock ASGI-like Request objects for use in testing. Usage: rf = AsyncRequestFactory() get_request = await rf.get('/hello/') post_request = await rf.post('/submit/', {'foo': 'bar'}) Once you have a request object you can pass it to any view function, including synchronous ones. The reason we have a separate class here is: a) this makes ASGIRequest subclasses, and b) AsyncTestClient can subclass it. """ def _base_scope(self, **request): """The base scope for a request.""" # This is a minimal valid ASGI scope, plus: # - headers['cookie'] for cookie support, # - 'client' often useful, see #8551. scope = { 'asgi': {'version': '3.0'}, 'type': 'http', 'http_version': '1.1', 'client': ['127.0.0.1', 0], 'server': ('testserver', '80'), 'scheme': 'http', 'method': 'GET', 'headers': [], **self.defaults, **request, } scope['headers'].append(( b'cookie', b'; '.join(sorted( ('%s=%s' % (morsel.key, morsel.coded_value)).encode('ascii') for morsel in self.cookies.values() )), )) return scope def request(self, **request): """Construct a generic request object.""" # This is synchronous, which means all methods on this class are. # AsyncClient, however, has an async request function, which makes all # its methods async. if '_body_file' in request: body_file = request.pop('_body_file') else: body_file = FakePayload('') return ASGIRequest(self._base_scope(**request), body_file) def generic( self, method, path, data='', content_type='application/octet-stream', secure=False, **extra, ): """Construct an arbitrary HTTP request.""" parsed = urlparse(str(path)) # path can be lazy. data = force_bytes(data, settings.DEFAULT_CHARSET) s = { 'method': method, 'path': self._get_path(parsed), 'server': ('127.0.0.1', '443' if secure else '80'), 'scheme': 'https' if secure else 'http', 'headers': [(b'host', b'testserver')], } if data: s['headers'].extend([ (b'content-length', str(len(data)).encode('ascii')), (b'content-type', content_type.encode('ascii')), ]) s['_body_file'] = FakePayload(data) follow = extra.pop('follow', None) if follow is not None: s['follow'] = follow s['headers'] += [ (key.lower().encode('ascii'), value.encode('latin1')) for key, value in extra.items() ] # If QUERY_STRING is absent or empty, we want to extract it from the # URL. if not s.get('query_string'): s['query_string'] = parsed[4] return self.request(**s) class ClientMixin: """ Mixin with common methods between Client and AsyncClient. """ def store_exc_info(self, **kwargs): """Store exceptions when they are generated by a view.""" self.exc_info = sys.exc_info() def check_exception(self, response): """ Look for a signaled exception, clear the current context exception data, re-raise the signaled exception, and clear the signaled exception from the local cache. """ response.exc_info = self.exc_info if self.exc_info: _, exc_value, _ = self.exc_info self.exc_info = None if self.raise_request_exception: raise exc_value @property def session(self): """Return the current session variables.""" engine = import_module(settings.SESSION_ENGINE) cookie = self.cookies.get(settings.SESSION_COOKIE_NAME) if cookie: return engine.SessionStore(cookie.value) session = engine.SessionStore() session.save() self.cookies[settings.SESSION_COOKIE_NAME] = session.session_key return session def login(self, **credentials): """ Set the Factory to appear as if it has successfully logged into a site. Return True if login is possible or False if the provided credentials are incorrect. """ from django.contrib.auth import authenticate user = authenticate(**credentials) if user: self._login(user) return True return False def force_login(self, user, backend=None): def get_backend(): from django.contrib.auth import load_backend for backend_path in settings.AUTHENTICATION_BACKENDS: backend = load_backend(backend_path) if hasattr(backend, 'get_user'): return backend_path if backend is None: backend = get_backend() user.backend = backend self._login(user, backend) def _login(self, user, backend=None): from django.contrib.auth import login # Create a fake request to store login details. request = HttpRequest() if self.session: request.session = self.session else: engine = import_module(settings.SESSION_ENGINE) request.session = engine.SessionStore() login(request, user, backend) # Save the session values. request.session.save() # Set the cookie to represent the session. session_cookie = settings.SESSION_COOKIE_NAME self.cookies[session_cookie] = request.session.session_key cookie_data = { 'max-age': None, 'path': '/', 'domain': settings.SESSION_COOKIE_DOMAIN, 'secure': settings.SESSION_COOKIE_SECURE or None, 'expires': None, } self.cookies[session_cookie].update(cookie_data) def logout(self): """Log out the user by removing the cookies and session object.""" from django.contrib.auth import get_user, logout request = HttpRequest() if self.session: request.session = self.session request.user = get_user(request) else: engine = import_module(settings.SESSION_ENGINE) request.session = engine.SessionStore() logout(request) self.cookies = SimpleCookie() def _parse_json(self, response, **extra): if not hasattr(response, '_json'): if not JSON_CONTENT_TYPE_RE.match(response.get('Content-Type')): raise ValueError( 'Content-Type header is "%s", not "application/json"' % response.get('Content-Type') ) response._json = json.loads(response.content.decode(response.charset), **extra) return response._json
[docs]class Client(ClientMixin, RequestFactory): """ A class that can act as a client for testing purposes. It allows the user to compose GET and POST requests, and obtain the response that the server gave to those requests. The server Response objects are annotated with the details of the contexts and templates that were rendered during the process of serving the request. Client objects are stateful - they will retain cookie (and thus session) details for the lifetime of the Client instance. This is not intended as a replacement for Twill/Selenium or the like - it is here to allow testing against the contexts and templates produced by a view, rather than the HTML rendered to the end-user. """ def __init__(self, enforce_csrf_checks=False, raise_request_exception=True, **defaults): super().__init__(**defaults) self.handler = ClientHandler(enforce_csrf_checks) self.raise_request_exception = raise_request_exception self.exc_info = None self.extra = None def request(self, **request): """ The master request method. Compose the environment dictionary and pass to the handler, return the result of the handler. Assume defaults for the query environment, which can be overridden using the arguments to the request. """ environ = self._base_environ(**request) # Curry a data dictionary into an instance of the template renderer # callback function. data = {} on_template_render = partial(store_rendered_templates, data) signal_uid = "template-render-%s" % id(request) signals.template_rendered.connect(on_template_render, dispatch_uid=signal_uid) # Capture exceptions created by the handler. exception_uid = "request-exception-%s" % id(request) got_request_exception.connect(self.store_exc_info, dispatch_uid=exception_uid) try: response = self.handler(environ) finally: signals.template_rendered.disconnect(dispatch_uid=signal_uid) got_request_exception.disconnect(dispatch_uid=exception_uid) # Check for signaled exceptions. self.check_exception(response) # Save the client and request that stimulated the response. response.client = self response.request = request # Add any rendered template detail to the response. response.templates = data.get('templates', []) response.context = data.get('context') response.json = partial(self._parse_json, response) # Attach the ResolverMatch instance to the response. response.resolver_match = SimpleLazyObject(lambda: resolve(request['PATH_INFO'])) # Flatten a single context. Not really necessary anymore thanks to the # __getattr__ flattening in ContextList, but has some edge case # backwards compatibility implications. if response.context and len(response.context) == 1: response.context = response.context[0] # Update persistent cookie data. if response.cookies: self.cookies.update(response.cookies) return response
[docs] def get(self, path, data=None, follow=False, secure=False, **extra): """Request a response from the server using GET.""" self.extra = extra response = super().get(path, data=data, secure=secure, **extra) if follow: response = self._handle_redirects(response, data=data, **extra) return response
[docs] def post(self, path, data=None, content_type=MULTIPART_CONTENT, follow=False, secure=False, **extra): """Request a response from the server using POST.""" self.extra = extra response = super().post(path, data=data, content_type=content_type, secure=secure, **extra) if follow: response = self._handle_redirects(response, data=data, content_type=content_type, **extra) return response
[docs] def head(self, path, data=None, follow=False, secure=False, **extra): """Request a response from the server using HEAD.""" self.extra = extra response = super().head(path, data=data, secure=secure, **extra) if follow: response = self._handle_redirects(response, data=data, **extra) return response
[docs] def options(self, path, data='', content_type='application/octet-stream', follow=False, secure=False, **extra): """Request a response from the server using OPTIONS.""" self.extra = extra response = super().options(path, data=data, content_type=content_type, secure=secure, **extra) if follow: response = self._handle_redirects(response, data=data, content_type=content_type, **extra) return response
[docs] def put(self, path, data='', content_type='application/octet-stream', follow=False, secure=False, **extra): """Send a resource to the server using PUT.""" self.extra = extra response = super().put(path, data=data, content_type=content_type, secure=secure, **extra) if follow: response = self._handle_redirects(response, data=data, content_type=content_type, **extra) return response
[docs] def patch(self, path, data='', content_type='application/octet-stream', follow=False, secure=False, **extra): """Send a resource to the server using PATCH.""" self.extra = extra response = super().patch(path, data=data, content_type=content_type, secure=secure, **extra) if follow: response = self._handle_redirects(response, data=data, content_type=content_type, **extra) return response
[docs] def delete(self, path, data='', content_type='application/octet-stream', follow=False, secure=False, **extra): """Send a DELETE request to the server.""" self.extra = extra response = super().delete(path, data=data, content_type=content_type, secure=secure, **extra) if follow: response = self._handle_redirects(response, data=data, content_type=content_type, **extra) return response
[docs] def trace(self, path, data='', follow=False, secure=False, **extra): """Send a TRACE request to the server.""" self.extra = extra response = super().trace(path, data=data, secure=secure, **extra) if follow: response = self._handle_redirects(response, data=data, **extra) return response
def _handle_redirects(self, response, data='', content_type='', **extra): """ Follow any redirects by requesting responses from the server using GET. """ response.redirect_chain = [] redirect_status_codes = ( HTTPStatus.MOVED_PERMANENTLY, HTTPStatus.FOUND, HTTPStatus.SEE_OTHER, HTTPStatus.TEMPORARY_REDIRECT, HTTPStatus.PERMANENT_REDIRECT, ) while response.status_code in redirect_status_codes: response_url = response.url redirect_chain = response.redirect_chain redirect_chain.append((response_url, response.status_code)) url = urlsplit(response_url) if url.scheme: extra['wsgi.url_scheme'] = url.scheme if url.hostname: extra['SERVER_NAME'] = url.hostname if url.port: extra['SERVER_PORT'] = str(url.port) # Prepend the request path to handle relative path redirects path = url.path if not path.startswith('/'): path = urljoin(response.request['PATH_INFO'], path) if response.status_code in (HTTPStatus.TEMPORARY_REDIRECT, HTTPStatus.PERMANENT_REDIRECT): # Preserve request method and query string (if needed) # post-redirect for 307/308 responses. request_method = response.request['REQUEST_METHOD'].lower() if request_method not in ('get', 'head'): extra['QUERY_STRING'] = url.query request_method = getattr(self, request_method) else: request_method = self.get data = QueryDict(url.query) content_type = None response = request_method(path, data=data, content_type=content_type, follow=False, **extra) response.redirect_chain = redirect_chain if redirect_chain[-1] in redirect_chain[:-1]: # Check that we're not redirecting to somewhere we've already # been to, to prevent loops. raise RedirectCycleError("Redirect loop detected.", last_response=response) if len(redirect_chain) > 20: # Such a lengthy chain likely also means a loop, but one with # a growing path, changing view, or changing query argument; # 20 is the value of "network.http.redirection-limit" from Firefox. raise RedirectCycleError("Too many redirects.", last_response=response) return response
class AsyncClient(ClientMixin, AsyncRequestFactory): """ An async version of Client that creates ASGIRequests and calls through an async request path. Does not currently support "follow" on its methods. """ def __init__(self, enforce_csrf_checks=False, raise_request_exception=True, **defaults): super().__init__(**defaults) self.handler = AsyncClientHandler(enforce_csrf_checks) self.raise_request_exception = raise_request_exception self.exc_info = None self.extra = None async def request(self, **request): """ The master request method. Compose the scope dictionary and pass to the handler, return the result of the handler. Assume defaults for the query environment, which can be overridden using the arguments to the request. """ if 'follow' in request: raise NotImplementedError( 'AsyncClient request methods do not accept the follow ' 'parameter.' ) scope = self._base_scope(**request) # Curry a data dictionary into an instance of the template renderer # callback function. data = {} on_template_render = partial(store_rendered_templates, data) signal_uid = 'template-render-%s' % id(request) signals.template_rendered.connect(on_template_render, dispatch_uid=signal_uid) # Capture exceptions created by the handler. exception_uid = 'request-exception-%s' % id(request) got_request_exception.connect(self.store_exc_info, dispatch_uid=exception_uid) try: response = await self.handler(scope) finally: signals.template_rendered.disconnect(dispatch_uid=signal_uid) got_request_exception.disconnect(dispatch_uid=exception_uid) # Check for signaled exceptions. self.check_exception(response) # Save the client and request that stimulated the response. response.client = self response.request = request # Add any rendered template detail to the response. response.templates = data.get('templates', []) response.context = data.get('context') response.json = partial(self._parse_json, response) # Attach the ResolverMatch instance to the response. response.resolver_match = SimpleLazyObject(lambda: resolve(request['path'])) # Flatten a single context. Not really necessary anymore thanks to the # __getattr__ flattening in ContextList, but has some edge case # backwards compatibility implications. if response.context and len(response.context) == 1: response.context = response.context[0] # Update persistent cookie data. if response.cookies: self.cookies.update(response.cookies) return response
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