[1.11.x] Added links and cosmetic edits to docs/ref/request-response.txt.
Backport of 8ab7ce8558 from master
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Tim Graham
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@ -40,9 +40,10 @@ All attributes should be considered read-only, unless stated otherwise.
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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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XML payload etc. For processing conventional form data, use
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:attr:`HttpRequest.POST`.
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You can also read from an HttpRequest using a file-like interface. See
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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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@ -68,7 +69,7 @@ All attributes should be considered read-only, unless stated otherwise.
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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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guaranteed to be uppercase. For example::
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if request.method == 'GET':
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do_something()
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@ -81,8 +82,9 @@ All attributes should be considered read-only, unless stated otherwise.
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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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from :attr:`GET` or :attr:`POST`) will use the new ``encoding`` value.
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Useful if you know the form data is not in the :setting:`DEFAULT_CHARSET`
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encoding.
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.. attribute:: HttpRequest.content_type
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@ -115,14 +117,13 @@ All attributes should be considered read-only, unless stated otherwise.
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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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"POST"`` (see :attr:`HttpRequest.method`).
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Note: ``POST`` does *not* include file-upload information. See ``FILES``.
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``POST`` does *not* include file-upload information. See :attr:`FILES`.
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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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A dictionary containing all cookies. Keys and values are strings.
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.. attribute:: HttpRequest.FILES
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@ -132,16 +133,14 @@ All attributes should be considered read-only, unless stated otherwise.
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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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``FILES`` will only contain data if the request method was POST and the
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``<form>`` that posted to the request had ``enctype="multipart/form-data"``.
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Otherwise, ``FILES`` will be a blank 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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A dictionary containing all available HTTP headers. Available headers
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depend on the client and server, but here are some 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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@ -353,7 +352,7 @@ Methods
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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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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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If a response varies on whether or not it's requested via AJAX and you are
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@ -370,13 +369,14 @@ Methods
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.. method:: HttpRequest.__iter__()
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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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``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 an 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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Given this standard interface, an ``HttpRequest`` instance can be
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passed directly to an XML parser such as
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:class:`~xml.etree.ElementTree.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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@ -388,15 +388,15 @@ Methods
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.. class:: QueryDict
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In an :class:`HttpRequest` object, the ``GET`` and ``POST`` attributes are
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instances of ``django.http.QueryDict``, a dictionary-like class customized to
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deal with multiple values for the same key. This is necessary because some HTML
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form elements, notably ``<select multiple>``, pass multiple values for the same
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key.
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In an :class:`HttpRequest` object, the :attr:`~HttpRequest.GET` and
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`attr:`~HttpRequest.POST` attributes are instances of ``django.http.QueryDict``,
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a dictionary-like class customized to deal with multiple values for the same
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key. This is necessary because some HTML form elements, notably
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``<select multiple>``, pass multiple values for the same key.
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The ``QueryDict``\ s at ``request.POST`` and ``request.GET`` will be immutable
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when accessed in a normal request/response cycle. To get a mutable version you
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need to use ``.copy()``.
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need to use :meth:`QueryDict.copy`.
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Methods
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-------
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@ -420,7 +420,8 @@ a subclass of dictionary. Exceptions are outlined here:
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``mutable=True`` to its ``__init__()``.
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Strings for setting both keys and values will be converted from ``encoding``
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to unicode. If encoding is not set, it defaults to :setting:`DEFAULT_CHARSET`.
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to unicode. If ``encoding`` is not set, it defaults to
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:setting:`DEFAULT_CHARSET`.
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.. classmethod:: QueryDict.fromkeys(iterable, value='', mutable=False, encoding=None)
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@ -435,17 +436,17 @@ 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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it 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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exist. (This is a subclass of Python's standard :exc:`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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Sets the given key to ``[value]`` (a 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`` (such as one that
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was created via ``copy()``).
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was created via :meth:`QueryDict.copy`).
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.. method:: QueryDict.__contains__(key)
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@ -454,19 +455,18 @@ a subclass of dictionary. Exceptions are outlined here:
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.. method:: QueryDict.get(key, default=None)
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Uses the same logic as ``__getitem__()`` above, with a hook for returning a
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Uses the same logic as :meth:`__getitem__`, 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=None)
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Just like the standard dictionary ``setdefault()`` method, except it uses
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``__setitem__()`` internally.
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Like :meth:`dict.setdefault`, except it uses :meth:`__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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Takes either a ``QueryDict`` or a dictionary. Like :meth:`dict.update`,
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except it *appends* to the current dictionary items rather than replacing
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them. For example::
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>>> q = QueryDict('a=1', mutable=True)
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>>> q.update({'a': '2'})
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@ -477,8 +477,8 @@ a subclass of dictionary. Exceptions are outlined here:
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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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Like :meth:`dict.items`, except this uses the same last-value logic as
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:meth:`__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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@ -486,9 +486,8 @@ a subclass of dictionary. Exceptions are outlined here:
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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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Like ``dict.iteritems()``, except this uses the same last-value logic as
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:meth:`__getitem__`.
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Available only on Python 2.
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@ -501,8 +500,8 @@ a subclass of dictionary. Exceptions are outlined here:
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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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Like :meth:`dict.values`, except this uses the same last-value logic as
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:meth:`__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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@ -518,19 +517,18 @@ 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. This copy will be mutable even if the original was not.
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Returns a copy of the object using :func:`copy.deepcopy`. This copy will
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be mutable even if the original was not.
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.. method:: QueryDict.getlist(key, default=None)
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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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provided is not a list.
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Returns a list of the data with the requested key. Returns an empty list if
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the key doesn't exist and a default value wasn't provided. It's guaranteed
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to return a list unless the default value provided isn't a list.
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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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Sets the given key to ``list_`` (unlike :meth:`__setitem__`).
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.. method:: QueryDict.appendlist(key, item)
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@ -538,7 +536,7 @@ In addition, ``QueryDict`` has the following methods:
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.. method:: QueryDict.setlistdefault(key, default_list=None)
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Just like ``setdefault``, except it takes a list of values instead of a
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Like :meth:`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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@ -572,9 +570,9 @@ In addition, ``QueryDict`` has the following methods:
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.. method:: QueryDict.dict()
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Returns ``dict`` representation of ``QueryDict``. For every (key, list)
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Returns a ``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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element of the list, using the 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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@ -582,14 +580,14 @@ In addition, ``QueryDict`` has the following methods:
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.. method:: QueryDict.urlencode(safe=None)
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Returns a string of the data in query-string format. Example::
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Returns a string of the data in query string format. For 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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Optionally, urlencode can be passed characters which
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do not require encoding. For example::
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Use the ``safe`` parameter to pass characters which don't require encoding.
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For example::
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>>> q = QueryDict(mutable=True)
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>>> q['next'] = '/a&b/'
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@ -603,7 +601,7 @@ In addition, ``QueryDict`` has the following methods:
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In contrast to :class:`HttpRequest` objects, which are created automatically by
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Django, :class:`HttpResponse` objects are your responsibility. Each view you
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write is responsible for instantiating, populating and returning an
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write is responsible for instantiating, populating, and returning an
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:class:`HttpResponse`.
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The :class:`HttpResponse` class lives in the :mod:`django.http` module.
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