B
    f\YB                 @   s  d dl mZ d dlZd dlZd dlZddlmZ ddlmZm	Z	 ddlm
Z
 ddlmZmZmZ ddlmZ dd	lmZ dd
lmZ ddlmZ ddlmZ dddgZeeZdZdZedeZ dd Z!e"e!e e"e!e dZ#ee	dZ$G dd deZ%G dd de%Z&dd Z'dS )    )absolute_importN   )RecentlyUsedContainer)HTTPConnectionPoolHTTPSConnectionPool)port_by_scheme)LocationValueErrorMaxRetryErrorProxySchemeUnknown)six)urljoin)RequestMethods)	parse_url)RetryPoolManagerProxyManagerproxy_from_url)Zkey_fileZ	cert_fileZ	cert_reqsZca_certsZssl_versionZca_cert_dirZssl_context)Z
key_schemeZkey_hostZkey_portZkey_timeoutZkey_retriesZ
key_strictZ	key_blockZkey_source_addressZkey_key_fileZkey_cert_fileZkey_cert_reqsZkey_ca_certsZkey_ssl_versionZkey_ca_cert_dirZkey_ssl_contextZkey_maxsizeZkey_headersZ
key__proxyZkey__proxy_headersZkey_socket_optionsZkey__socks_optionsZkey_assert_hostnameZkey_assert_fingerprintZkey_server_hostnamePoolKeyc             C   s   |  }|d  |d< |d  |d< x4dD ],}||kr.|| dk	r.t||  ||< q.W |d}|dk	r|t||d< x&t| D ]}|||d| < qW x| j	D ]}||krd||< qW | f |S )a  
    Create a pool key out of a request context dictionary.

    According to RFC 3986, both the scheme and host are case-insensitive.
    Therefore, this function normalizes both before constructing the pool
    key for an HTTPS request. If you wish to change this behaviour, provide
    alternate callables to ``key_fn_by_scheme``.

    :param key_class:
        The class to use when constructing the key. This should be a namedtuple
        with the ``scheme`` and ``host`` keys at a minimum.
    :type  key_class: namedtuple
    :param request_context:
        A dictionary-like object that contain the context for a request.
    :type  request_context: dict

    :return: A namedtuple that can be used as a connection pool key.
    :rtype:  PoolKey
    schemehost)headers_proxy_headersZ_socks_optionsNZsocket_optionsZkey_)
copylower	frozensetitemsgettuplelistkeyspop_fields)Z	key_classrequest_contextcontextkeyZsocket_optsZfield r%   2lib/python3.7/site-packages/urllib3/poolmanager.py_default_key_normalizer;   s    

r'   )httphttpsc               @   sx   e Zd ZdZdZdddZdd Zdd	 Zdd
dZdd Z	dddZ
dd ZdddZd ddZdd Zd!ddZdS )"r   a$  
    Allows for arbitrary requests while transparently keeping track of
    necessary connection pools for you.

    :param num_pools:
        Number of connection pools to cache before discarding the least
        recently used pool.

    :param headers:
        Headers to include with all requests, unless other headers are given
        explicitly.

    :param \**connection_pool_kw:
        Additional parameters are used to create fresh
        :class:`urllib3.connectionpool.ConnectionPool` instances.

    Example::

        >>> manager = PoolManager(num_pools=2)
        >>> r = manager.request('GET', 'http://google.com/')
        >>> r = manager.request('GET', 'http://google.com/mail')
        >>> r = manager.request('GET', 'http://yahoo.com/')
        >>> len(manager.pools)
        2

    N
   c             K   s8   t | | || _t|dd d| _t| _t | _d S )Nc             S   s   |   S )N)close)pr%   r%   r&   <lambda>       z&PoolManager.__init__.<locals>.<lambda>)Zdispose_func)r   __init__connection_pool_kwr   poolspool_classes_by_schemekey_fn_by_schemer   )self	num_poolsr   r0   r%   r%   r&   r/      s    zPoolManager.__init__c             C   s   | S )Nr%   )r4   r%   r%   r&   	__enter__   s    zPoolManager.__enter__c             C   s   |    dS )NF)clear)r4   exc_typeZexc_valZexc_tbr%   r%   r&   __exit__   s    zPoolManager.__exit__c             C   sf   | j | }|dkr| j }xdD ]}||d q"W |dkrXxtD ]}||d qDW |||f|S )a  
        Create a new :class:`ConnectionPool` based on host, port, scheme, and
        any additional pool keyword arguments.

        If ``request_context`` is provided, it is provided as keyword arguments
        to the pool class used. This method is used to actually create the
        connection pools handed out by :meth:`connection_from_url` and
        companion methods. It is intended to be overridden for customization.
        N)r   r   portr(   )r2   r0   r   r    SSL_KEYWORDS)r4   r   r   r:   r"   Zpool_clsr$   kwr%   r%   r&   	_new_pool   s    




zPoolManager._new_poolc             C   s   | j   dS )z
        Empty our store of pools and direct them all to close.

        This will not affect in-flight connections, but they will not be
        re-used after completion.
        N)r1   r7   )r4   r%   r%   r&   r7      s    zPoolManager.clearr(   c             C   sT   |st d| |}|pd|d< |s:t|d  d}||d< ||d< | |S )a  
        Get a :class:`ConnectionPool` based on the host, port, and scheme.

        If ``port`` isn't given, it will be derived from the ``scheme`` using
        ``urllib3.connectionpool.port_by_scheme``. If ``pool_kwargs`` is
        provided, it is merged with the instance's ``connection_pool_kw``
        variable and used to create the new connection pool, if one is
        needed.
        zNo host specified.r(   r   P   r:   r   )r   _merge_pool_kwargsr   r   r   connection_from_context)r4   r   r:   r   pool_kwargsr"   r%   r%   r&   connection_from_host   s    
z PoolManager.connection_from_hostc             C   s,   |d   }| j| }||}| j||dS )z
        Get a :class:`ConnectionPool` based on the request context.

        ``request_context`` must at least contain the ``scheme`` key and its
        value must be a key in ``key_fn_by_scheme`` instance variable.
        r   )r"   )r   r3   connection_from_pool_key)r4   r"   r   Zpool_key_constructorpool_keyr%   r%   r&   r@      s    
z#PoolManager.connection_from_contextc          	   C   s`   | j jN | j |}|r|S |d }|d }|d }| j||||d}|| j |< W dQ R X |S )z
        Get a :class:`ConnectionPool` based on the provided pool key.

        ``pool_key`` should be a namedtuple that only contains immutable
        objects. At a minimum it must have the ``scheme``, ``host``, and
        ``port`` fields.
        r   r   r:   )r"   N)r1   lockr   r=   )r4   rD   r"   Zpoolr   r   r:   r%   r%   r&   rC      s    
z$PoolManager.connection_from_pool_keyc             C   s    t |}| j|j|j|j|dS )a  
        Similar to :func:`urllib3.connectionpool.connection_from_url`.

        If ``pool_kwargs`` is not provided and a new pool needs to be
        constructed, ``self.connection_pool_kw`` is used to initialize
        the :class:`urllib3.connectionpool.ConnectionPool`. If ``pool_kwargs``
        is provided, it is used instead. Note that if a new pool does not
        need to be created for the request, the provided ``pool_kwargs`` are
        not used.
        )r:   r   rA   )r   rB   r   r:   r   )r4   urlrA   ur%   r%   r&   connection_from_url  s    zPoolManager.connection_from_urlc          	   C   sZ   | j  }|rVxF| D ]:\}}|dkrJy
||= W qR tk
rF   Y qRX q|||< qW |S )a  
        Merge a dictionary of override values for self.connection_pool_kw.

        This does not modify self.connection_pool_kw and returns a new dict.
        Any keys in the override dictionary with a value of ``None`` are
        removed from the merged dictionary.
        N)r0   r   r   KeyError)r4   overrideZbase_pool_kwargsr$   valuer%   r%   r&   r?     s    

zPoolManager._merge_pool_kwargsTc             K   s  t |}| j|j|j|jd}d|d< d|d< d|krD| j |d< | jdk	rj|jdkrj|j||f|}n|j||j	f|}|o|
 }|s|S t||}|jdkrd	}|d
}	t|	tstj|	|d}	|	jr||stt|d }
x*|
D ]"}| |	jkr|d |d qW y|	j||||d}	W n  tk
rR   |	jrN |S X |	|d
< ||d< td|| | j||f|S )a]  
        Same as :meth:`urllib3.connectionpool.HTTPConnectionPool.urlopen`
        with custom cross-host redirect logic and only sends the request-uri
        portion of the ``url``.

        The given ``url`` parameter must be absolute, such that an appropriate
        :class:`urllib3.connectionpool.ConnectionPool` can be chosen for it.
        )r:   r   FZassert_same_hostredirectr   Nr(   i/  ZGETretries)rL   )responseZ_poolzRedirecting %s -> %s)r   rB   r   r:   r   r   r   proxyurlopenZrequest_uriZget_redirect_locationr   Zstatusr   
isinstancer   Zfrom_intZremove_headers_on_redirectZis_same_hostr   r   Ziterkeysr   r    Z	incrementr	   Zraise_on_redirectloginfo)r4   methodrF   rL   r<   rG   ZconnrN   Zredirect_locationrM   r   headerr%   r%   r&   rP   /  sD    	




zPoolManager.urlopen)r*   N)N)Nr(   N)N)N)T)__name__
__module____qualname____doc__rO   r/   r6   r9   r=   r7   rB   r@   rC   rH   r?   rP   r%   r%   r%   r&   r   {   s   

	


c                   sH   e Zd ZdZd fdd	Zd fdd	Zdd	d
Zd fdd	Z  ZS )r   ax  
    Behaves just like :class:`PoolManager`, but sends all requests through
    the defined proxy, using the CONNECT method for HTTPS URLs.

    :param proxy_url:
        The URL of the proxy to be used.

    :param proxy_headers:
        A dictionary containing headers that will be sent to the proxy. In case
        of HTTP they are being sent with each request, while in the
        HTTPS/CONNECT case they are sent only once. Could be used for proxy
        authentication.

    Example:
        >>> proxy = urllib3.ProxyManager('http://localhost:3128/')
        >>> r1 = proxy.request('GET', 'http://google.com/')
        >>> r2 = proxy.request('GET', 'http://httpbin.org/')
        >>> len(proxy.pools)
        1
        >>> r3 = proxy.request('GET', 'https://httpbin.org/')
        >>> r4 = proxy.request('GET', 'https://twitter.com/')
        >>> len(proxy.pools)
        3

    r*   Nc                s   t |trd|j|j|jf }t|}|jsFt|jd}|j|d}|jdkrZt	|j|| _
|pfi | _| j
|d< | j|d< tt| j||f| d S )Nz
%s://%s:%ir>   )r:   )r(   r)   _proxyr   )rQ   r   r   r   r:   r   r   r   _replacer
   rO   proxy_headerssuperr   r/   )r4   	proxy_urlr5   r   r\   r0   rO   r:   )	__class__r%   r&   r/     s    








zProxyManager.__init__r(   c                sD   |dkr t t| j||||dS t t| j| jj| jj| jj|dS )Nr)   )rA   )r]   r   rB   rO   r   r:   r   )r4   r   r:   r   rA   )r_   r%   r&   rB     s
    

z!ProxyManager.connection_from_hostc             C   s0   ddi}t |j}|r||d< |r,|| |S )z
        Sets headers needed by proxies: specifically, the Accept and Host
        headers. Only sets headers not provided by the user.
        ZAcceptz*/*ZHost)r   netlocupdate)r4   rF   r   Zheaders_r`   r%   r%   r&   _set_proxy_headers  s    

zProxyManager._set_proxy_headersTc                sN   t |}|jdkr0|d| j}| |||d< tt| j||fd|i|S )z@Same as HTTP(S)ConnectionPool.urlopen, ``url`` must be absolute.r(   r   rL   )r   r   r   r   rb   r]   r   rP   )r4   rT   rF   rL   r<   rG   r   )r_   r%   r&   rP     s
    
zProxyManager.urlopen)r*   NN)Nr(   N)N)T)	rV   rW   rX   rY   r/   rB   rb   rP   __classcell__r%   r%   )r_   r&   r   m  s    
c             K   s   t f d| i|S )Nr^   )r   )rF   r<   r%   r%   r&   r     s    )(Z
__future__r   collections	functoolsZlogging_collectionsr   Zconnectionpoolr   r   r   
exceptionsr   r	   r
   Zpackagesr   Zpackages.six.moves.urllib.parser   Zrequestr   Zutil.urlr   Z
util.retryr   __all__Z	getLoggerrV   rR   r;   Z_key_fields
namedtupler   r'   partialr3   r2   r   r   r   r%   r%   r%   r&   <module>   s4   

6
 sW