mirror of
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da200c5e35
This keyword was already deprecated in the code (supported for backwards compatibility only), but never formally deprecated. Thanks Paul McMillan for the report and yasar11732 for the initial patch.
780 lines
27 KiB
Plaintext
780 lines
27 KiB
Plaintext
============================
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Request and response objects
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============================
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.. module:: django.http
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:synopsis: Classes dealing with HTTP requests and responses.
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Quick overview
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==============
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Django uses request and response objects to pass state through the system.
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When a page is requested, Django creates an :class:`HttpRequest` object that
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contains metadata about the request. Then Django loads the appropriate view,
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passing the :class:`HttpRequest` as the first argument to the view function.
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Each view is responsible for returning an :class:`HttpResponse` object.
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This document explains the APIs for :class:`HttpRequest` and
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:class:`HttpResponse` objects.
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HttpRequest objects
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===================
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.. class:: HttpRequest
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.. _httprequest-attributes:
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Attributes
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----------
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All attributes should be considered read-only, unless stated otherwise below.
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``session`` is a notable exception.
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.. attribute:: HttpRequest.body
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.. versionchanged:: 1.4
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Before Django 1.4, ``HttpRequest.body`` was named
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``HttpRequest.raw_post_data``.
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The raw HTTP request body as a byte string. This is useful for processing
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data in different ways than conventional HTML forms: binary images,
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XML payload etc. For processing conventional form data, use ``HttpRequest.POST``.
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.. versionadded:: 1.3
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You can also read from an HttpRequest using a file-like interface. See
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:meth:`HttpRequest.read()`.
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.. attribute:: HttpRequest.path
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A string representing the full path to the requested page, not including
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the domain.
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Example: ``"/music/bands/the_beatles/"``
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.. attribute:: HttpRequest.path_info
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Under some Web server configurations, the portion of the URL after the host
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name is split up into a script prefix portion and a path info portion.
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The ``path_info`` attribute always contains the path info portion of the
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path, no matter what Web server is being used. Using this instead of
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attr:`~HttpRequest.path` can make your code much easier to move between test
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and deployment servers.
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For example, if the ``WSGIScriptAlias`` for your application is set to
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``"/minfo"``, then ``path`` might be ``"/minfo/music/bands/the_beatles/"``
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and ``path_info`` would be ``"/music/bands/the_beatles/"``.
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.. attribute:: HttpRequest.method
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A string representing the HTTP method used in the request. This is
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guaranteed to be uppercase. Example::
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if request.method == 'GET':
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do_something()
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elif request.method == 'POST':
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do_something_else()
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.. attribute:: HttpRequest.encoding
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A string representing the current encoding used to decode form submission
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data (or ``None``, which means the :setting:`DEFAULT_CHARSET` setting is
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used). You can write to this attribute to change the encoding used when
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accessing the form data. Any subsequent attribute accesses (such as reading
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from ``GET`` or ``POST``) will use the new ``encoding`` value. Useful if
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you know the form data is not in the :setting:`DEFAULT_CHARSET` encoding.
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.. attribute:: HttpRequest.GET
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A dictionary-like object containing all given HTTP GET parameters. See the
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:class:`QueryDict` documentation below.
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.. attribute:: HttpRequest.POST
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A dictionary-like object containing all given HTTP POST parameters. See the
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:class:`QueryDict` documentation below.
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It's possible that a request can come in via POST with an empty ``POST``
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dictionary -- if, say, a form is requested via the POST HTTP method but
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does not include form data. Therefore, you shouldn't use ``if request.POST``
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to check for use of the POST method; instead, use ``if request.method ==
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"POST"`` (see above).
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Note: ``POST`` does *not* include file-upload information. See ``FILES``.
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.. attribute:: HttpRequest.REQUEST
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For convenience, a dictionary-like object that searches ``POST`` first,
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then ``GET``. Inspired by PHP's ``$_REQUEST``.
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For example, if ``GET = {"name": "john"}`` and ``POST = {"age": '34'}``,
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``REQUEST["name"]`` would be ``"john"``, and ``REQUEST["age"]`` would be
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``"34"``.
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It's strongly suggested that you use ``GET`` and ``POST`` instead of
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``REQUEST``, because the former are more explicit.
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.. attribute:: HttpRequest.COOKIES
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A standard Python dictionary containing all cookies. Keys and values are
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strings.
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.. attribute:: HttpRequest.FILES
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A dictionary-like object containing all uploaded files. Each key in
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``FILES`` is the ``name`` from the ``<input type="file" name="" />``. Each
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value in ``FILES`` is an :class:`UploadedFile` as described below.
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See :doc:`/topics/files` for more information.
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Note that ``FILES`` will only contain data if the request method was POST
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and the ``<form>`` that posted to the request had
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``enctype="multipart/form-data"``. Otherwise, ``FILES`` will be a blank
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dictionary-like object.
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.. attribute:: HttpRequest.META
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A standard Python dictionary containing all available HTTP headers.
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Available headers depend on the client and server, but here are some
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examples:
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* ``CONTENT_LENGTH`` -- the length of the request body (as a string).
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* ``CONTENT_TYPE`` -- the MIME type of the request body.
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* ``HTTP_ACCEPT_ENCODING`` -- Acceptable encodings for the response.
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* ``HTTP_ACCEPT_LANGUAGE`` -- Acceptable languages for the response.
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* ``HTTP_HOST`` -- The HTTP Host header sent by the client.
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* ``HTTP_REFERER`` -- The referring page, if any.
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* ``HTTP_USER_AGENT`` -- The client's user-agent string.
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* ``QUERY_STRING`` -- The query string, as a single (unparsed) string.
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* ``REMOTE_ADDR`` -- The IP address of the client.
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* ``REMOTE_HOST`` -- The hostname of the client.
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* ``REMOTE_USER`` -- The user authenticated by the Web server, if any.
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* ``REQUEST_METHOD`` -- A string such as ``"GET"`` or ``"POST"``.
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* ``SERVER_NAME`` -- The hostname of the server.
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* ``SERVER_PORT`` -- The port of the server (as a string).
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With the exception of ``CONTENT_LENGTH`` and ``CONTENT_TYPE``, as given
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above, any HTTP headers in the request are converted to ``META`` keys by
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converting all characters to uppercase, replacing any hyphens with
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underscores and adding an ``HTTP_`` prefix to the name. So, for example, a
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header called ``X-Bender`` would be mapped to the ``META`` key
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``HTTP_X_BENDER``.
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.. attribute:: HttpRequest.user
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A ``django.contrib.auth.models.User`` object representing the currently
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logged-in user. If the user isn't currently logged in, ``user`` will be set
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to an instance of ``django.contrib.auth.models.AnonymousUser``. You
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can tell them apart with ``is_authenticated()``, like so::
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if request.user.is_authenticated():
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# Do something for logged-in users.
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else:
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# Do something for anonymous users.
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``user`` is only available if your Django installation has the
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``AuthenticationMiddleware`` activated. For more, see
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:doc:`/topics/auth`.
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.. attribute:: HttpRequest.session
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A readable-and-writable, dictionary-like object that represents the current
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session. This is only available if your Django installation has session
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support activated. See the :doc:`session documentation
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</topics/http/sessions>` for full details.
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.. attribute:: HttpRequest.urlconf
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Not defined by Django itself, but will be read if other code (e.g., a custom
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middleware class) sets it. When present, this will be used as the root
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URLconf for the current request, overriding the :setting:`ROOT_URLCONF`
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setting. See :ref:`how-django-processes-a-request` for details.
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Methods
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-------
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.. method:: HttpRequest.get_host()
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Returns the originating host of the request using information from the
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``HTTP_X_FORWARDED_HOST`` (if :setting:`USE_X_FORWARDED_HOST` is enabled)
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and ``HTTP_HOST`` headers, in that order. If they don't provide a value,
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the method uses a combination of ``SERVER_NAME`` and ``SERVER_PORT`` as
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detailed in :pep:`3333`.
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Example: ``"127.0.0.1:8000"``
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.. note:: The :meth:`~HttpRequest.get_host()` method fails when the host is
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behind multiple proxies. One solution is to use middleware to rewrite
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the proxy headers, as in the following example::
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class MultipleProxyMiddleware(object):
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FORWARDED_FOR_FIELDS = [
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'HTTP_X_FORWARDED_FOR',
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'HTTP_X_FORWARDED_HOST',
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'HTTP_X_FORWARDED_SERVER',
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]
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def process_request(self, request):
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"""
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Rewrites the proxy headers so that only the most
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recent proxy is used.
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"""
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for field in self.FORWARDED_FOR_FIELDS:
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if field in request.META:
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if ',' in request.META[field]:
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parts = request.META[field].split(',')
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request.META[field] = parts[-1].strip()
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This middleware should be positioned before any other middleware that
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relies on the value of :meth:`~HttpRequest.get_host()` -- for instance,
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:class:`~django.middleware.common.CommonMiddleware` or
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:class:`~django.middleware.csrf.CsrfViewMiddleware`.
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.. method:: HttpRequest.get_full_path()
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Returns the ``path``, plus an appended query string, if applicable.
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Example: ``"/music/bands/the_beatles/?print=true"``
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.. method:: HttpRequest.build_absolute_uri(location)
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Returns the absolute URI form of ``location``. If no location is provided,
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the location will be set to ``request.get_full_path()``.
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If the location is already an absolute URI, it will not be altered.
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Otherwise the absolute URI is built using the server variables available in
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this request.
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Example: ``"http://example.com/music/bands/the_beatles/?print=true"``
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.. method:: HttpRequest.get_signed_cookie(key, default=RAISE_ERROR, salt='', max_age=None)
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.. versionadded:: 1.4
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Returns a cookie value for a signed cookie, or raises a
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:class:`~django.core.signing.BadSignature` exception if the signature is
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no longer valid. If you provide the ``default`` argument the exception
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will be suppressed and that default value will be returned instead.
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The optional ``salt`` argument can be used to provide extra protection
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against brute force attacks on your secret key. If supplied, the
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``max_age`` argument will be checked against the signed timestamp
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attached to the cookie value to ensure the cookie is not older than
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``max_age`` seconds.
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For example::
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>>> request.get_signed_cookie('name')
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'Tony'
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>>> request.get_signed_cookie('name', salt='name-salt')
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'Tony' # assuming cookie was set using the same salt
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>>> request.get_signed_cookie('non-existing-cookie')
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...
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KeyError: 'non-existing-cookie'
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>>> request.get_signed_cookie('non-existing-cookie', False)
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False
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>>> request.get_signed_cookie('cookie-that-was-tampered-with')
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...
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BadSignature: ...
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>>> request.get_signed_cookie('name', max_age=60)
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...
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SignatureExpired: Signature age 1677.3839159 > 60 seconds
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>>> request.get_signed_cookie('name', False, max_age=60)
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False
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See :doc:`cryptographic signing </topics/signing>` for more information.
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.. method:: HttpRequest.is_secure()
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Returns ``True`` if the request is secure; that is, if it was made with
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HTTPS.
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.. method:: HttpRequest.is_ajax()
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Returns ``True`` if the request was made via an ``XMLHttpRequest``, by
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checking the ``HTTP_X_REQUESTED_WITH`` header for the string
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``'XMLHttpRequest'``. Most modern JavaScript libraries send this header.
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If you write your own XMLHttpRequest call (on the browser side), you'll
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have to set this header manually if you want ``is_ajax()`` to work.
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.. method:: HttpRequest.read(size=None)
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.. method:: HttpRequest.readline()
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.. method:: HttpRequest.readlines()
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.. method:: HttpRequest.xreadlines()
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.. method:: HttpRequest.__iter__()
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.. versionadded:: 1.3
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Methods implementing a file-like interface for reading from an
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HttpRequest instance. This makes it possible to consume an incoming
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request in a streaming fashion. A common use-case would be to process a
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big XML payload with iterative parser without constructing a whole
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XML tree in memory.
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Given this standard interface, an HttpRequest instance can be
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passed directly to an XML parser such as ElementTree::
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import xml.etree.ElementTree as ET
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for element in ET.iterparse(request):
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process(element)
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UploadedFile objects
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====================
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.. class:: UploadedFile
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Attributes
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----------
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.. attribute:: UploadedFile.name
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The name of the uploaded file.
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.. attribute:: UploadedFile.size
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The size, in bytes, of the uploaded file.
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Methods
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----------
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.. method:: UploadedFile.chunks(chunk_size=None)
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Returns a generator that yields sequential chunks of data.
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.. method:: UploadedFile.read(num_bytes=None)
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Read a number of bytes from the file.
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QueryDict objects
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=================
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.. class:: QueryDict
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In an :class:`HttpRequest` object, the ``GET`` and ``POST`` attributes are instances
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of ``django.http.QueryDict``. :class:`QueryDict` is a dictionary-like
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class customized to deal with multiple values for the same key. This is
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necessary because some HTML form elements, notably
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``<select multiple="multiple">``, pass multiple values for the same key.
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``QueryDict`` instances are immutable, unless you create a ``copy()`` of them.
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That means you can't change attributes of ``request.POST`` and ``request.GET``
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directly.
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Methods
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-------
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:class:`QueryDict` implements all the standard dictionary methods, because it's
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a subclass of dictionary. Exceptions are outlined here:
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.. method:: QueryDict.__getitem__(key)
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Returns the value for the given key. If the key has more than one value,
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``__getitem__()`` returns the last value. Raises
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``django.utils.datastructures.MultiValueDictKeyError`` if the key does not
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exist. (This is a subclass of Python's standard ``KeyError``, so you can
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stick to catching ``KeyError``.)
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.. method:: QueryDict.__setitem__(key, value)
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Sets the given key to ``[value]`` (a Python list whose single element is
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``value``). Note that this, as other dictionary functions that have side
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effects, can only be called on a mutable ``QueryDict`` (one that was created
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via ``copy()``).
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.. method:: QueryDict.__contains__(key)
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Returns ``True`` if the given key is set. This lets you do, e.g., ``if "foo"
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in request.GET``.
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.. method:: QueryDict.get(key, default)
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Uses the same logic as ``__getitem__()`` above, with a hook for returning a
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default value if the key doesn't exist.
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.. method:: QueryDict.setdefault(key, default)
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Just like the standard dictionary ``setdefault()`` method, except it uses
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``__setitem__()`` internally.
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.. method:: QueryDict.update(other_dict)
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Takes either a ``QueryDict`` or standard dictionary. Just like the standard
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dictionary ``update()`` method, except it *appends* to the current
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dictionary items rather than replacing them. For example::
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>>> q = QueryDict('a=1')
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>>> q = q.copy() # to make it mutable
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>>> q.update({'a': '2'})
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>>> q.getlist('a')
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[u'1', u'2']
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>>> q['a'] # returns the last
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[u'2']
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.. method:: QueryDict.items()
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Just like the standard dictionary ``items()`` method, except this uses the
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same last-value logic as ``__getitem__()``. For example::
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>>> q = QueryDict('a=1&a=2&a=3')
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>>> q.items()
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[(u'a', u'3')]
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.. method:: QueryDict.iteritems()
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Just like the standard dictionary ``iteritems()`` method. Like
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:meth:`QueryDict.items()` this uses the same last-value logic as
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:meth:`QueryDict.__getitem__()`.
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.. method:: QueryDict.iterlists()
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Like :meth:`QueryDict.iteritems()` except it includes all values, as a list,
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for each member of the dictionary.
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.. method:: QueryDict.values()
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Just like the standard dictionary ``values()`` method, except this uses the
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same last-value logic as ``__getitem__()``. For example::
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>>> q = QueryDict('a=1&a=2&a=3')
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>>> q.values()
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[u'3']
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.. method:: QueryDict.itervalues()
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Just like :meth:`QueryDict.values()`, except an iterator.
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In addition, ``QueryDict`` has the following methods:
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.. method:: QueryDict.copy()
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Returns a copy of the object, using ``copy.deepcopy()`` from the Python
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standard library. The copy will be mutable -- that is, you can change its
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values.
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.. method:: QueryDict.getlist(key, default)
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Returns the data with the requested key, as a Python list. Returns an
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empty list if the key doesn't exist and no default value was provided.
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It's guaranteed to return a list of some sort unless the default value
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was no list.
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.. versionchanged:: 1.4
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The ``default`` parameter was added.
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.. method:: QueryDict.setlist(key, list_)
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Sets the given key to ``list_`` (unlike ``__setitem__()``).
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.. method:: QueryDict.appendlist(key, item)
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Appends an item to the internal list associated with key.
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.. method:: QueryDict.setlistdefault(key, default_list)
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Just like ``setdefault``, except it takes a list of values instead of a
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single value.
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.. method:: QueryDict.lists()
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Like :meth:`items()`, except it includes all values, as a list, for each
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member of the dictionary. For example::
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>>> q = QueryDict('a=1&a=2&a=3')
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>>> q.lists()
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[(u'a', [u'1', u'2', u'3'])]
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.. method:: QueryDict.dict()
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.. versionadded:: 1.4
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Returns ``dict`` representation of ``QueryDict``. For every (key, list)
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pair in ``QueryDict``, ``dict`` will have (key, item), where item is one
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element of the list, using same logic as :meth:`QueryDict.__getitem__()`::
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>>> q = QueryDict('a=1&a=3&a=5')
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>>> q.dict()
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{u'a': u'5'}
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.. method:: QueryDict.urlencode([safe])
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Returns a string of the data in query-string format. Example::
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>>> q = QueryDict('a=2&b=3&b=5')
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>>> q.urlencode()
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'a=2&b=3&b=5'
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.. versionchanged:: 1.3
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The ``safe`` parameter was added.
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Optionally, urlencode can be passed characters which
|
|
do not require encoding. For example::
|
|
|
|
>>> q = QueryDict('', mutable=True)
|
|
>>> q['next'] = '/a&b/'
|
|
>>> q.urlencode(safe='/')
|
|
'next=/a%26b/'
|
|
|
|
HttpResponse objects
|
|
====================
|
|
|
|
.. class:: HttpResponse
|
|
|
|
In contrast to :class:`HttpRequest` objects, which are created automatically by
|
|
Django, :class:`HttpResponse` objects are your responsibility. Each view you
|
|
write is responsible for instantiating, populating and returning an
|
|
:class:`HttpResponse`.
|
|
|
|
The :class:`HttpResponse` class lives in the :mod:`django.http` module.
|
|
|
|
Usage
|
|
-----
|
|
|
|
Passing strings
|
|
~~~~~~~~~~~~~~~
|
|
|
|
Typical usage is to pass the contents of the page, as a string, to the
|
|
:class:`HttpResponse` constructor::
|
|
|
|
>>> from django.http import HttpResponse
|
|
>>> response = HttpResponse("Here's the text of the Web page.")
|
|
>>> response = HttpResponse("Text only, please.", content_type="text/plain")
|
|
|
|
But if you want to add content incrementally, you can use ``response`` as a
|
|
file-like object::
|
|
|
|
>>> response = HttpResponse()
|
|
>>> response.write("<p>Here's the text of the Web page.</p>")
|
|
>>> response.write("<p>Here's another paragraph.</p>")
|
|
|
|
Passing iterators
|
|
~~~~~~~~~~~~~~~~~
|
|
|
|
Finally, you can pass ``HttpResponse`` an iterator rather than passing it
|
|
hard-coded strings. If you use this technique, follow these guidelines:
|
|
|
|
* The iterator should return strings.
|
|
* If an :class:`HttpResponse` has been initialized with an iterator as its
|
|
content, you can't use the :class:`HttpResponse` instance as a file-like
|
|
object. Doing so will raise ``Exception``.
|
|
|
|
Setting headers
|
|
~~~~~~~~~~~~~~~
|
|
|
|
To set or remove a header in your response, treat it like a dictionary::
|
|
|
|
>>> response = HttpResponse()
|
|
>>> response['Cache-Control'] = 'no-cache'
|
|
>>> del response['Cache-Control']
|
|
|
|
Note that unlike a dictionary, ``del`` doesn't raise ``KeyError`` if the header
|
|
doesn't exist.
|
|
|
|
HTTP headers cannot contain newlines. An attempt to set a header containing a
|
|
newline character (CR or LF) will raise ``BadHeaderError``
|
|
|
|
Telling the browser to treat the response as a file attachment
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
To tell the browser to treat the response as a file attachment, use the
|
|
``content_type`` argument and set the ``Content-Disposition`` header. For example,
|
|
this is how you might return a Microsoft Excel spreadsheet::
|
|
|
|
>>> response = HttpResponse(my_data, content_type='application/vnd.ms-excel')
|
|
>>> response['Content-Disposition'] = 'attachment; filename=foo.xls'
|
|
|
|
There's nothing Django-specific about the ``Content-Disposition`` header, but
|
|
it's easy to forget the syntax, so we've included it here.
|
|
|
|
Attributes
|
|
----------
|
|
|
|
.. attribute:: HttpResponse.content
|
|
|
|
A string representing the content, encoded from a Unicode
|
|
object if necessary.
|
|
|
|
.. attribute:: HttpResponse.status_code
|
|
|
|
The `HTTP Status code`_ for the response.
|
|
|
|
Methods
|
|
-------
|
|
|
|
.. method:: HttpResponse.__init__(content='', content_type=None, status=200)
|
|
|
|
Instantiates an ``HttpResponse`` object with the given page content and
|
|
content type.
|
|
|
|
``content`` should be an iterator or a string. If it's an
|
|
iterator, it should return strings, and those strings will be
|
|
joined together to form the content of the response. If it is not
|
|
an iterator or a string, it will be converted to a string when
|
|
accessed.
|
|
|
|
``content_type`` is the MIME type optionally completed by a character set
|
|
encoding and is used to fill the HTTP ``Content-Type`` header. If not
|
|
specified, it is formed by the :setting:`DEFAULT_CONTENT_TYPE` and
|
|
:setting:`DEFAULT_CHARSET` settings, by default: "`text/html; charset=utf-8`".
|
|
|
|
Historically, this parameter was called ``mimetype`` (now deprecated).
|
|
|
|
``status`` is the `HTTP Status code`_ for the response.
|
|
|
|
|
|
.. method:: HttpResponse.__setitem__(header, value)
|
|
|
|
Sets the given header name to the given value. Both ``header`` and
|
|
``value`` should be strings.
|
|
|
|
.. method:: HttpResponse.__delitem__(header)
|
|
|
|
Deletes the header with the given name. Fails silently if the header
|
|
doesn't exist. Case-insensitive.
|
|
|
|
.. method:: HttpResponse.__getitem__(header)
|
|
|
|
Returns the value for the given header name. Case-insensitive.
|
|
|
|
.. method:: HttpResponse.has_header(header)
|
|
|
|
Returns ``True`` or ``False`` based on a case-insensitive check for a
|
|
header with the given name.
|
|
|
|
.. method:: HttpResponse.set_cookie(key, value='', max_age=None, expires=None, path='/', domain=None, secure=None, httponly=True)
|
|
|
|
.. versionchanged:: 1.3
|
|
|
|
The possibility of specifying a ``datetime.datetime`` object in
|
|
``expires``, and the auto-calculation of ``max_age`` in such case
|
|
was added. The ``httponly`` argument was also added.
|
|
|
|
.. versionchanged:: 1.4
|
|
|
|
The default value for httponly was changed from ``False`` to ``True``.
|
|
|
|
Sets a cookie. The parameters are the same as in the :class:`Cookie.Morsel`
|
|
object in the Python standard library.
|
|
|
|
* ``max_age`` should be a number of seconds, or ``None`` (default) if
|
|
the cookie should last only as long as the client's browser session.
|
|
If ``expires`` is not specified, it will be calculated.
|
|
* ``expires`` should either be a string in the format
|
|
``"Wdy, DD-Mon-YY HH:MM:SS GMT"`` or a ``datetime.datetime`` object
|
|
in UTC. If ``expires`` is a ``datetime`` object, the ``max_age``
|
|
will be calculated.
|
|
* Use ``domain`` if you want to set a cross-domain cookie. For example,
|
|
``domain=".lawrence.com"`` will set a cookie that is readable by
|
|
the domains www.lawrence.com, blogs.lawrence.com and
|
|
calendars.lawrence.com. Otherwise, a cookie will only be readable by
|
|
the domain that set it.
|
|
* Use ``httponly=True`` if you want to prevent client-side
|
|
JavaScript from having access to the cookie.
|
|
|
|
HTTPOnly_ is a flag included in a Set-Cookie HTTP response
|
|
header. It is not part of the :rfc:`2109` standard for cookies,
|
|
and it isn't honored consistently by all browsers. However,
|
|
when it is honored, it can be a useful way to mitigate the
|
|
risk of client side script accessing the protected cookie
|
|
data.
|
|
|
|
.. _HTTPOnly: https://www.owasp.org/index.php/HTTPOnly
|
|
|
|
.. method:: HttpResponse.set_signed_cookie(key, value='', salt='', max_age=None, expires=None, path='/', domain=None, secure=None, httponly=True)
|
|
|
|
.. versionadded:: 1.4
|
|
|
|
Like :meth:`~HttpResponse.set_cookie()`, but
|
|
:doc:`cryptographic signing </topics/signing>` the cookie before setting
|
|
it. Use in conjunction with :meth:`HttpRequest.get_signed_cookie`.
|
|
You can use the optional ``salt`` argument for added key strength, but
|
|
you will need to remember to pass it to the corresponding
|
|
:meth:`HttpRequest.get_signed_cookie` call.
|
|
|
|
.. method:: HttpResponse.delete_cookie(key, path='/', domain=None)
|
|
|
|
Deletes the cookie with the given key. Fails silently if the key doesn't
|
|
exist.
|
|
|
|
Due to the way cookies work, ``path`` and ``domain`` should be the same
|
|
values you used in ``set_cookie()`` -- otherwise the cookie may not be
|
|
deleted.
|
|
|
|
.. method:: HttpResponse.write(content)
|
|
|
|
This method makes an :class:`HttpResponse` instance a file-like object.
|
|
|
|
.. method:: HttpResponse.flush()
|
|
|
|
This method makes an :class:`HttpResponse` instance a file-like object.
|
|
|
|
.. method:: HttpResponse.tell()
|
|
|
|
This method makes an :class:`HttpResponse` instance a file-like object.
|
|
|
|
.. _HTTP Status code: http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10
|
|
|
|
|
|
.. _ref-httpresponse-subclasses:
|
|
|
|
HttpResponse subclasses
|
|
-----------------------
|
|
|
|
Django includes a number of ``HttpResponse`` subclasses that handle different
|
|
types of HTTP responses. Like ``HttpResponse``, these subclasses live in
|
|
:mod:`django.http`.
|
|
|
|
.. class:: HttpResponseRedirect
|
|
|
|
The constructor takes a single argument -- the path to redirect to. This
|
|
can be a fully qualified URL (e.g. ``'http://www.yahoo.com/search/'``) or
|
|
an absolute path with no domain (e.g. ``'/search/'``). Note that this
|
|
returns an HTTP status code 302.
|
|
|
|
.. class:: HttpResponsePermanentRedirect
|
|
|
|
Like :class:`HttpResponseRedirect`, but it returns a permanent redirect
|
|
(HTTP status code 301) instead of a "found" redirect (status code 302).
|
|
|
|
.. class:: HttpResponseNotModified
|
|
|
|
The constructor doesn't take any arguments. Use this to designate that a
|
|
page hasn't been modified since the user's last request (status code 304).
|
|
|
|
.. class:: HttpResponseBadRequest
|
|
|
|
Acts just like :class:`HttpResponse` but uses a 400 status code.
|
|
|
|
.. class:: HttpResponseNotFound
|
|
|
|
Acts just like :class:`HttpResponse` but uses a 404 status code.
|
|
|
|
.. class:: HttpResponseForbidden
|
|
|
|
Acts just like :class:`HttpResponse` but uses a 403 status code.
|
|
|
|
.. class:: HttpResponseNotAllowed
|
|
|
|
Like :class:`HttpResponse`, but uses a 405 status code. Takes a single,
|
|
required argument: a list of permitted methods (e.g. ``['GET', 'POST']``).
|
|
|
|
.. class:: HttpResponseGone
|
|
|
|
Acts just like :class:`HttpResponse` but uses a 410 status code.
|
|
|
|
.. class:: HttpResponseServerError
|
|
|
|
Acts just like :class:`HttpResponse` but uses a 500 status code.
|
|
|
|
.. note::
|
|
|
|
If a custom subclass of :class:`HttpResponse` implements a ``render``
|
|
method, Django will treat it as emulating a
|
|
:class:`~django.template.response.SimpleTemplateResponse`, and the
|
|
``render`` method must itself return a valid response object.
|