o
    b                     @   sn   d dl mZ d dlZddlmZmZ ddlmZ dd Zej	ddfd	d
Z
dd Zdd Zdd ZedZdS )    )absolute_importN   )NoWayToWaitForSocketErrorwait_for_read   )_appengine_environc                 C   sH   t | dd}|du rdS |du rdS zt|ddW S  ty#   Y dS w )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)getattrr   r   )connr    r   V/var/www/secure340b-portal/env/lib/python3.10/site-packages/urllib3/util/connection.pyis_connection_dropped   s   
r   c                 C   s   | \}}| dr|d}d}t }t|||tjD ]Q}|\}	}
}}}d}z't|	|
|}t|| |tjur>|| |rE|	| |
| |W   S  tjym } z|}|durc|  d}W Y d}~qd}~ww |durt|td)ad  Connect 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)
startswithstripallowed_gai_familysocketgetaddrinfoSOCK_STREAM_set_socket_options_GLOBAL_DEFAULT_TIMEOUT
settimeoutbindconnecterrorclose)addressr	   source_addresssocket_optionshostporterrfamilyresafsocktypeproto	canonnamesar   er   r   r   create_connection!   s6   








r+   c                 C   s$   |d u rd S |D ]}| j |  qd S )N)
setsockopt)r   optionsoptr   r   r   r   U   s
   r   c                  C   s   t j} trt j} | 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.)r   AF_INETHAS_IPV6	AF_UNSPEC)r#   r   r   r   r   ]   s   r   c                 C   s`   d}d}t  r
dS tjr(zttj}|| df d}W n	 ty'   Y nw |r.|  |S )z6 Returns True if the system can bind an IPv6 address. NFr   T)r   is_appengine_sandboxr   has_ipv6AF_INET6r   	Exceptionr   )r    r   r3   r   r   r   	_has_ipv6h   s   r6   z::1)
__future__r   r   waitr   r   contribr   r   r   r+   r   r   r6   r0   r   r   r   r   <module>   s    
4