FM / library

/usr/share/doc/python3-docs/html/_sources/library/

/usr/share/doc/python3-docs/html/_sources/library

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Edit: /usr/share/doc/python3-docs/html/_sources/library/http.client.rst.txt (18870B)

:mod:`http.client` --- HTTP protocol client
===========================================

.. module:: http.client
   :synopsis: HTTP and HTTPS protocol client (requires sockets).

**Source code:** :source:`Lib/http/client.py`

.. index::
   pair: HTTP; protocol
   single: HTTP; http.client (standard module)

.. index:: module: urllib.request

--------------

This module defines classes which implement the client side of the HTTP and
HTTPS protocols.  It is normally not used directly --- the module
:mod:`urllib.request` uses it to handle URLs that use HTTP and HTTPS.

.. seealso::

The `Requests package <http://docs.python-requests.org/>`_
    is recommended for a higher-level HTTP client interface.

.. note::

HTTPS support is only available if Python was compiled with SSL support
   (through the :mod:`ssl` module).

The module provides the following classes:

.. class:: HTTPConnection(host, port=None[, timeout], source_address=None)

An :class:`HTTPConnection` instance represents one transaction with an HTTP
   server.  It should be instantiated passing it a host and optional port
   number.  If no port number is passed, the port is extracted from the host
   string if it has the form ``host:port``, else the default HTTP port (80) is
   used.  If the optional *timeout* parameter is given, blocking
   operations (like connection attempts) will timeout after that many seconds
   (if it is not given, the global default timeout setting is used).
   The optional *source_address* parameter may be a tuple of a (host, port)
   to use as the source address the HTTP connection is made from.

For example, the following calls all create instances that connect to the server
   at the same host and port::

>>> h1 = http.client.HTTPConnection('www.python.org')
      >>> h2 = http.client.HTTPConnection('www.python.org:80')
      >>> h3 = http.client.HTTPConnection('www.python.org', 80)
      >>> h4 = http.client.HTTPConnection('www.python.org', 80, timeout=10)

.. versionchanged:: 3.2
      *source_address* was added.

.. versionchanged:: 3.4
      The  *strict* parameter was removed. HTTP 0.9-style "Simple Responses" are
      not longer supported.

.. class:: HTTPSConnection(host, port=None, key_file=None, \
                           cert_file=None[, timeout], \
                           source_address=None, *, context=None, \
                           check_hostname=None)

A subclass of :class:`HTTPConnection` that uses SSL for communication with
   secure servers.  Default port is ``443``.  If *context* is specified, it
   must be a :class:`ssl.SSLContext` instance describing the various SSL
   options.

Please read :ref:`ssl-security` for more information on best practices.

.. versionchanged:: 3.2
      *source_address*, *context* and *check_hostname* were added.

.. versionchanged:: 3.2
      This class now supports HTTPS virtual hosts if possible (that is,
      if :data:`ssl.HAS_SNI` is true).

.. versionchanged:: 3.4
      The *strict* parameter was removed. HTTP 0.9-style "Simple Responses" are
      no longer supported.

.. versionchanged:: 3.4.3
      This class now performs all the necessary certificate and hostname checks
      by default. To revert to the previous, unverified, behavior
      :func:`ssl._create_unverified_context` can be passed to the *context*
      parameter.

.. deprecated:: 3.6

*key_file* and *cert_file* are deprecated in favor of *context*.
       Please use :meth:`ssl.SSLContext.load_cert_chain` instead, or let
       :func:`ssl.create_default_context` select the system's trusted CA
       certificates for you.

The *check_hostname* parameter is also deprecated; the
       :attr:`ssl.SSLContext.check_hostname` attribute of *context* should
       be used instead.

.. class:: HTTPResponse(sock, debuglevel=0, method=None, url=None)

Class whose instances are returned upon successful connection.  Not
   instantiated directly by user.

.. versionchanged:: 3.4
      The *strict* parameter was removed. HTTP 0.9 style "Simple Responses" are
      no longer supported.

The following exceptions are raised as appropriate:

.. exception:: HTTPException

The base class of the other exceptions in this module.  It is a subclass of
   :exc:`Exception`.

.. exception:: NotConnected