3 ]]@snddlmZddlZddlmZmZddlmZddZej ddfd d Z d d Z d dZ ddZ e dZdS))absolute_importN)NoWayToWaitForSocketError wait_for_read)_appengine_environc CsJt|dd}|dkrdS|dkr$dSy t|ddStk rDdSXdS)a  Returns True if the connection is dropped and should be closed. :param conn: :class:`httplib.HTTPConnection` object. Note: For platforms like AppEngine, this will always return ``False`` to let the platform handle connection recycling transparently for us. sockFNTg)timeout)getattrrr)connrr :/tmp/pip-build-irfnccat/urllib3/urllib3/util/connection.pyis_connection_droppeds  rcCs|\}}|jdr|jd}d}t}xtj|||tjD]}|\} } } } } d}yHtj| | | }t|||tjk r~|j||r|j ||j | |Stj k r}z|}|dk r|j d}WYdd}~Xq:Xq:W|dk r|tj ddS)adConnect to *address* and return the socket object. Convenience function. Connect to *address* (a 2-tuple ``(host, port)``) and return the socket object. Passing the optional *timeout* parameter will set the timeout on the socket instance before attempting to connect. If no *timeout* is supplied, the global default timeout setting returned by :func:`getdefaulttimeout` is used. If *source_address* is set it must be a tuple of (host, port) for the socket to bind as a source address before making the connection. An host of '' or port 0 tells the OS to use the default. [z[]Nz!getaddrinfo returns an empty list) startswithstripallowed_gai_familysocket getaddrinfo SOCK_STREAM_set_socket_options_GLOBAL_DEFAULT_TIMEOUT settimeoutbindconnecterrorclose)addressr source_addresssocket_optionshostporterrfamilyresafsocktypeproto canonnamesarer r r create_connection!s2       r+cCs(|dkr dSx|D]}|j|qWdS)N) setsockopt)roptionsoptr r r rYs rcCstj}trtj}|S)zThis function is designed to work in the context of getaddrinfo, where family=socket.AF_UNSPEC is the default and will perform a DNS search for both IPv6 and IPv4 records.)rAF_INETHAS_IPV6 AF_UNSPEC)r#r r r rasrc Csbd}d}tjrdStjrRy"tjtj}|j|dfd}Wntk rPYnX|r^|j|S)z6 Returns True if the system can bind an IPv6 address. NFrT)rZis_appengine_sandboxrhas_ipv6AF_INET6r Exceptionr)r rr2r r r _has_ipv6ls r5z::1) __future__rrwaitrrcontribrrrr+rrr5r0r r r r s   4