File: //lib/python3.9/site-packages/pip/_vendor/urllib3/util/__pycache__/connection.cpython-39.pyc
a
?�f � @ sn d dl mZ d dlZddlmZmZ ddlmZ dd� Zej ddfd d
�Z
dd� Zd
d� Zdd� Z
e
d�ZdS )� )�absolute_importN� )�NoWayToWaitForSocketError�
wait_for_read� )�_appengine_environc C sL t | dd�}|du rdS |du r$dS zt|dd�W S tyF Y dS 0 dS )a
Returns True if the connection is dropped and should be closed.
:param conn:
:class:`httplib.HTTPConnection` object.
Note: For platforms like AppEngine, this will always return ``False`` to
let the platform handle connection recycling transparently for us.
�sockFNTg )�timeout)�getattrr r )Zconnr � r �G/usr/lib/python3.9/site-packages/pip/_vendor/urllib3/util/connection.py�is_connection_dropped s
r
c C s� | \}}|� d�r|�d�}d}t� }t�|||tj�D ]�}|\} }
}}}
d}zNt�| |
|�}t||� |tjur||�|� |r�|� |� |�
|
� |W S tjy� } z$|}|dur�|�� d}W Y d}~q8d}~0 0 q8|dur�|�t�d��dS )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�socketZgetaddrinfoZSOCK_STREAM�_set_socket_options�_GLOBAL_DEFAULT_TIMEOUTZ
settimeout�bindZconnect�error�close)Zaddressr Zsource_addressZsocket_options�host�port�err�family�resZafZsocktype�protoZ canonnameZsar �er r r �create_connection! s2
r c C s$ |d u rd S |D ]}| j |� qd S )N)Z
setsockopt)r �options�optr r r r Y s r c C s t j} trt j} | S )z�This 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 ZAF_INET�HAS_IPV6Z AF_UNSPEC)r r r r r a s r c C s` d}d}t �� rdS tjrPz"t�tj�}|�| df� d}W n tyN Y n0 |r\|�� |S )z6 Returns True if the system can bind an IPv6 address. NFr T)r Zis_appengine_sandboxr �has_ipv6ZAF_INET6r � Exceptionr )r r r# r r r � _has_ipv6l s r% z::1)Z
__future__r r �waitr r Zcontribr r
r r r r r% r"