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exceptionstSocketOptionsAdaptercBsreZdZedk	rBeejdejej	dfg�Z
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jd�d�Zed�ZRS(sdAn adapter for requests that allows users to specify socket options.

    Since version 2.4.0 of requests, it is possible to specify a custom list
    of socket options that need to be set before establishing the connection.

    Example usage::

        >>> import socket
        >>> import requests
        >>> from requests_toolbelt.adapters import socket_options
        >>> s = requests.Session()
        >>> opts = [(socket.IPPROTO_TCP, socket.TCP_NODELAY, 0)]
        >>> adapter = socket_options.SocketOptionsAdapter(socket_options=opts)
        >>> s.mount('http://', adapter)

    You can also take advantage of the list of default options on this class
    to keep using the original options in addition to your custom options. In
    that case, ``opts`` might look like::

        >>> opts = socket_options.SocketOptionsAdapter.default_options + opts

    tdefault_socket_optionsis�This version of Requests is only compatible with a version of urllib3 which is too old to support setting options on a socket. This adapter is functionally useless.cKs2|jd|j�|_tt|�j|�dS(Ntsocket_options(tpoptdefault_optionsRtsuperRt__init__(tselftkwargs((sM/usr/lib/python2.7/site-packages/requests_toolbelt/adapters/socket_options.pyR
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tFalseR(((sM/usr/lib/python2.7/site-packages/requests_toolbelt/adapters/socket_options.pyRs	tTCPKeepAliveAdaptercBseZdZd�ZRS(sJAn adapter for requests that turns on TCP Keep-Alive by default.

    The adapter sets 4 socket options:

    - ``SOL_SOCKET`` ``SO_KEEPALIVE`` - This turns on TCP Keep-Alive
    - ``IPPROTO_TCP`` ``TCP_KEEPINTVL`` 20 - Sets the keep alive interval
    - ``IPPROTO_TCP`` ``TCP_KEEPCNT`` 5 - Sets the number of keep alive probes
    - ``IPPROTO_TCP`` ``TCP_KEEPIDLE`` 60 - Sets the keep alive time if the
      socket library has the ``TCP_KEEPIDLE`` constant

    The latter three can be overridden by keyword arguments (respectively):

    - ``idle``
    - ``interval``
    - ``count``

    You can use this adapter like so::

       >>> from requests_toolbelt.adapters import socket_options
       >>> tcp = socket_options.TCPKeepAliveAdapter(idle=120, interval=10)
       >>> s = requests.Session()
       >>> s.mount('http://', tcp)

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