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File: //usr/local/CyberCP/lib/python3.10/site-packages/tornado/__pycache__/httpclient.cpython-310.pyc
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e�Z Gdd�de�Z!Gdd�de�Z"Gdd�de#�Z$e$Z%Gdd�de�Z&ddd�Z'e(dkr�e'�dSdS)a�Blocking and non-blocking HTTP client interfaces.

This module defines a common interface shared by two implementations,
``simple_httpclient`` and ``curl_httpclient``.  Applications may either
instantiate their chosen implementation class directly or use the
`AsyncHTTPClient` class from this module, which selects an implementation
that can be overridden with the `AsyncHTTPClient.configure` method.

The default implementation is ``simple_httpclient``, and this is expected
to be suitable for most users' needs.  However, some applications may wish
to switch to ``curl_httpclient`` for reasons such as the following:

* ``curl_httpclient`` has some features not found in ``simple_httpclient``,
  including support for HTTP proxies and the ability to use a specified
  network interface.

* ``curl_httpclient`` is more likely to be compatible with sites that are
  not-quite-compliant with the HTTP spec, or sites that use little-exercised
  features of HTTP.

* ``curl_httpclient`` is faster.

Note that if you are using ``curl_httpclient``, it is highly
recommended that you use a recent version of ``libcurl`` and
``pycurl``.  Currently the minimum supported version of libcurl is
7.22.0, and the minimum version of pycurl is 7.18.2.  It is highly
recommended that your ``libcurl`` installation is built with
asynchronous DNS resolver (threaded or c-ares), otherwise you may
encounter various problems with request timeouts (for more
information, see
http://curl.haxx.se/libcurl/c/curl_easy_setopt.html#CURLOPTCONNECTTIMEOUTMS
and comments in curl_httpclient.py).

To select ``curl_httpclient``, call `AsyncHTTPClient.configure` at startup::

    AsyncHTTPClient.configure("tornado.curl_httpclient.CurlAsyncHTTPClient")
�N)�BytesIO)�Future�"future_set_result_unless_cancelled�%future_set_exception_unless_cancelled)�utf8�
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    Typical usage looks like this::

        http_client = httpclient.HTTPClient()
        try:
            response = http_client.fetch("http://www.google.com/")
            print(response.body)
        except httpclient.HTTPError as e:
            # HTTPError is raised for non-200 responses; the response
            # can be found in e.response.
            print("Error: " + str(e))
        except Exception as e:
            # Other errors are possible, such as IOError.
            print("Error: " + str(e))
        http_client.close()

    .. versionchanged:: 5.0

       Due to limitations in `asyncio`, it is no longer possible to
       use the synchronous ``HTTPClient`` while an `.IOLoop` is running.
       Use `AsyncHTTPClient` instead.

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            http_client = AsyncHTTPClient()
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            except Exception as e:
                print("Error: %s" % e)
            else:
                print(response.body)

    The constructor for this class is magic in several respects: It
    actually creates an instance of an implementation-specific
    subclass, and instances are reused as a kind of pseudo-singleton
    (one per `.IOLoop`). The keyword argument ``force_instance=True``
    can be used to suppress this singleton behavior. Unless
    ``force_instance=True`` is used, no arguments should be passed to
    the `AsyncHTTPClient` constructor. The implementation subclass as
    well as arguments to its constructor can be set with the static
    method `configure()`

    All `AsyncHTTPClient` implementations support a ``defaults``
    keyword argument, which can be used to set default values for
    `HTTPRequest` attributes.  For example::

        AsyncHTTPClient.configure(
            None, defaults=dict(user_agent="MyUserAgent"))
        # or with force_instance:
        client = AsyncHTTPClient(force_instance=True,
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    .. versionchanged:: 5.0
       The ``io_loop`` argument (deprecated since version 4.1) has been removed.

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        This method returns a `.Future` whose result is an
        `HTTPResponse`. By default, the ``Future`` will raise an
        `HTTPError` if the request returned a non-200 response code
        (other errors may also be raised if the server could not be
        contacted). Instead, if ``raise_error`` is set to False, the
        response will always be returned regardless of the response
        code.

        If a ``callback`` is given, it will be invoked with the `HTTPResponse`.
        In the callback interface, `HTTPError` is not automatically raised.
        Instead, you must check the response's ``error`` attribute or
        call its `~HTTPResponse.rethrow` method.

        .. versionchanged:: 6.0

           The ``callback`` argument was removed. Use the returned
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        If additional keyword arguments are given, they will be passed
        to the constructor of each subclass instance created.  The
        keyword argument ``max_clients`` determines the maximum number
        of simultaneous `~AsyncHTTPClient.fetch()` operations that can
        execute in parallel on each `.IOLoop`.  Additional arguments
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|_| durH| |_n||_||_||_||_||_||_||_||_||_||_||_|!|_||_ t!�!�|_"dS)a%All parameters except ``url`` are optional.

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        :arg str method: HTTP method, e.g. "GET" or "POST"
        :arg headers: Additional HTTP headers to pass on the request
        :type headers: `~tornado.httputil.HTTPHeaders` or `dict`
        :arg body: HTTP request body as a string (byte or unicode; if unicode
           the utf-8 encoding will be used)
        :type body: `str` or `bytes`
        :arg collections.abc.Callable body_producer: Callable used for
           lazy/asynchronous request bodies.
           It is called with one argument, a ``write`` function, and should
           return a `.Future`.  It should call the write function with new
           data as it becomes available.  The write function returns a
           `.Future` which can be used for flow control.
           Only one of ``body`` and ``body_producer`` may
           be specified.  ``body_producer`` is not supported on
           ``curl_httpclient``.  When using ``body_producer`` it is recommended
           to pass a ``Content-Length`` in the headers as otherwise chunked
           encoding will be used, and many servers do not support chunked
           encoding on requests.  New in Tornado 4.0
        :arg str auth_username: Username for HTTP authentication
        :arg str auth_password: Password for HTTP authentication
        :arg str auth_mode: Authentication mode; default is "basic".
           Allowed values are implementation-defined; ``curl_httpclient``
           supports "basic" and "digest"; ``simple_httpclient`` only supports
           "basic"
        :arg float connect_timeout: Timeout for initial connection in seconds,
           default 20 seconds (0 means no timeout)
        :arg float request_timeout: Timeout for entire request in seconds,
           default 20 seconds (0 means no timeout)
        :arg if_modified_since: Timestamp for ``If-Modified-Since`` header
        :type if_modified_since: `datetime` or `float`
        :arg bool follow_redirects: Should redirects be followed automatically
           or return the 3xx response? Default True.
        :arg int max_redirects: Limit for ``follow_redirects``, default 5.
        :arg str user_agent: String to send as ``User-Agent`` header
        :arg bool decompress_response: Request a compressed response from
           the server and decompress it after downloading.  Default is True.
           New in Tornado 4.0.
        :arg bool use_gzip: Deprecated alias for ``decompress_response``
           since Tornado 4.0.
        :arg str network_interface: Network interface or source IP to use for request.
           See ``curl_httpclient`` note below.
        :arg collections.abc.Callable streaming_callback: If set, ``streaming_callback`` will
           be run with each chunk of data as it is received, and
           ``HTTPResponse.body`` and ``HTTPResponse.buffer`` will be empty in
           the final response.
        :arg collections.abc.Callable header_callback: If set, ``header_callback`` will
           be run with each header line as it is received (including the
           first line, e.g. ``HTTP/1.0 200 OK\r\n``, and a final line
           containing only ``\r\n``.  All lines include the trailing newline
           characters).  ``HTTPResponse.headers`` will be empty in the final
           response.  This is most useful in conjunction with
           ``streaming_callback``, because it's the only way to get access to
           header data while the request is in progress.
        :arg collections.abc.Callable prepare_curl_callback: If set, will be called with
           a ``pycurl.Curl`` object to allow the application to make additional
           ``setopt`` calls.
        :arg str proxy_host: HTTP proxy hostname.  To use proxies,
           ``proxy_host`` and ``proxy_port`` must be set; ``proxy_username``,
           ``proxy_pass`` and ``proxy_auth_mode`` are optional.  Proxies are
           currently only supported with ``curl_httpclient``.
        :arg int proxy_port: HTTP proxy port
        :arg str proxy_username: HTTP proxy username
        :arg str proxy_password: HTTP proxy password
        :arg str proxy_auth_mode: HTTP proxy Authentication mode;
           default is "basic". supports "basic" and "digest"
        :arg bool allow_nonstandard_methods: Allow unknown values for ``method``
           argument? Default is False.
        :arg bool validate_cert: For HTTPS requests, validate the server's
           certificate? Default is True.
        :arg str ca_certs: filename of CA certificates in PEM format,
           or None to use defaults.  See note below when used with
           ``curl_httpclient``.
        :arg str client_key: Filename for client SSL key, if any.  See
           note below when used with ``curl_httpclient``.
        :arg str client_cert: Filename for client SSL certificate, if any.
           See note below when used with ``curl_httpclient``.
        :arg ssl.SSLContext ssl_options: `ssl.SSLContext` object for use in
           ``simple_httpclient`` (unsupported by ``curl_httpclient``).
           Overrides ``validate_cert``, ``ca_certs``, ``client_key``,
           and ``client_cert``.
        :arg bool allow_ipv6: Use IPv6 when available?  Default is True.
        :arg bool expect_100_continue: If true, send the
           ``Expect: 100-continue`` header and wait for a continue response
           before sending the request body.  Only supported with
           ``simple_httpclient``.

        .. note::

            When using ``curl_httpclient`` certain options may be
            inherited by subsequent fetches because ``pycurl`` does
            not allow them to be cleanly reset.  This applies to the
            ``ca_certs``, ``client_key``, ``client_cert``, and
            ``network_interface`` arguments.  If you use these
            options, you should pass them on every request (you don't
            have to always use the same values, but it's not possible
            to mix requests that specify these options with ones that
            use the defaults).

        .. versionadded:: 3.1
           The ``auth_mode`` argument.

        .. versionadded:: 4.0
           The ``body_producer`` and ``expect_100_continue`` arguments.

        .. versionadded:: 4.2
           The ``ssl_options`` argument.

        .. versionadded:: 4.5
           The ``proxy_auth_mode`` argument.
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    * ``effective_url``: final location of the resource after following any
      redirects

    * ``buffer``: ``cStringIO`` object for response body

    * ``body``: response body as bytes (created on demand from ``self.buffer``)

    * ``error``: Exception object, if any

    * ``request_time``: seconds from request start to finish. Includes all
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      data. Does not include time spent in the queue (due to the
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      the final request.

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    .. versionadded:: 5.1

       Added the ``start_time`` attribute.

    .. versionchanged:: 5.1

       The ``request_time`` attribute previously included time spent in the queue
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       Renamed from ``HTTPError`` to ``HTTPClientError`` to avoid collisions with
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