Update 'requests' lib to v2.0.

third_party/requests/packages/urllib3/poolmanager.py

 # urllib3/poolmanager.py
 # Copyright 2008-2013 Andrey Petrov and contributors (see CONTRIBUTORS.txt)
 #
 # This module is part of urllib3 and is released under
 # the MIT License: http://www.opensource.org/licenses/mit-license.php
 
 import logging
 
+try:  # Python 3
+    from urllib.parse import urljoin
+except ImportError:
+    from urlparse import urljoin
+
 from ._collections import RecentlyUsedContainer
 from .connectionpool import HTTPConnectionPool, HTTPSConnectionPool
-from .connectionpool import connection_from_url, port_by_scheme
+from .connectionpool import port_by_scheme
 from .request import RequestMethods
 from .util import parse_url
 
 
 __all__ = ['PoolManager', 'ProxyManager', 'proxy_from_url']
 
 
 pool_classes_by_scheme = {
     'http': HTTPConnectionPool,
     'https': HTTPSConnectionPool,
@@ skipping 26 matching lines @@
 
         >>> 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
 
     """
 
+    proxy = None
+
     def __init__(self, num_pools=10, headers=None, **connection_pool_kw):
         RequestMethods.__init__(self, headers)
         self.connection_pool_kw = connection_pool_kw
         self.pools = RecentlyUsedContainer(num_pools,
                                            dispose_func=lambda p: p.close())
 
     def _new_pool(self, scheme, host, port):
         """
         Create a new :class:`ConnectionPool` based on host, port and scheme.
 
@@ skipping 19 matching lines @@
         """
         self.pools.clear()
 
     def connection_from_host(self, host, port=None, scheme='http'):
         """
         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``.
         """
+
         scheme = scheme or 'http'
+
         port = port or port_by_scheme.get(scheme, 80)
 
         pool_key = (scheme, host, port)
 
-        # If the scheme, host, or port doesn't match existing open connections,
-        # open a new ConnectionPool.
-        pool = self.pools.get(pool_key)
-        if pool:
-            return pool
+        with self.pools.lock:
+            # If the scheme, host, or port doesn't match existing open
+            # connections, open a new ConnectionPool.
+            pool = self.pools.get(pool_key)
+            if pool:
+                return pool
 
-        # Make a fresh ConnectionPool of the desired type
-        pool = self._new_pool(scheme, host, port)
-        self.pools[pool_key] = pool
+            # Make a fresh ConnectionPool of the desired type
+            pool = self._new_pool(scheme, host, port)
+            self.pools[pool_key] = pool
         return pool
 
     def connection_from_url(self, url):
         """
         Similar to :func:`urllib3.connectionpool.connection_from_url` but
         doesn't pass any additional parameters to the
         :class:`urllib3.connectionpool.ConnectionPool` constructor.
 
         Additional parameters are taken from the :class:`.PoolManager`
         constructor.
@@ skipping 11 matching lines @@
         :class:`urllib3.connectionpool.ConnectionPool` can be chosen for it.
         """
         u = parse_url(url)
         conn = self.connection_from_host(u.host, port=u.port, scheme=u.scheme)
 
         kw['assert_same_host'] = False
         kw['redirect'] = False
         if 'headers' not in kw:
             kw['headers'] = self.headers
 
-        response = conn.urlopen(method, u.request_uri, **kw)
+        if self.proxy is not None and u.scheme == "http":
+            response = conn.urlopen(method, url, **kw)
+        else:
+            response = conn.urlopen(method, u.request_uri, **kw)
 
         redirect_location = redirect and response.get_redirect_location()
         if not redirect_location:
             return response
 
+        # Support relative URLs for redirecting.
+        redirect_location = urljoin(url, redirect_location)
+
+        # RFC 2616, Section 10.3.4
         if response.status == 303:
             method = 'GET'
 
         log.info("Redirecting %s -> %s" % (url, redirect_location))
         kw['retries'] = kw.get('retries', 3) - 1  # Persist retries countdown
         kw['redirect'] = redirect
         return self.urlopen(method, redirect_location, **kw)
 
 
-class ProxyManager(RequestMethods):
+class ProxyManager(PoolManager):
     """
-    Given a ConnectionPool to a proxy, the ProxyManager's ``urlopen`` method
-    will make requests to any url through the defined proxy. The ProxyManager
-    class will automatically set the 'Host' header if it is not provided.
+    Behaves just like :class:`PoolManager`, but sends all requests through
+    the defined proxy, using the CONNECT method for HTTPS URLs.
+
+    :param poxy_url:
+        The URL of the proxy to be used.
+
+    :param proxy_headers:
+        A dictionary contaning 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
+
     """
 
-    def __init__(self, proxy_pool):
-        self.proxy_pool = proxy_pool
+    def __init__(self, proxy_url, num_pools=10, headers=None,
+                 proxy_headers=None, **connection_pool_kw):
+
+        if isinstance(proxy_url, HTTPConnectionPool):
+            proxy_url = '%s://%s:%i' % (proxy_url.scheme, proxy_url.host,
+                                        proxy_url.port)
+        proxy = parse_url(proxy_url)
+        if not proxy.port:
+            port = port_by_scheme.get(proxy.scheme, 80)
+            proxy = proxy._replace(port=port)
+        self.proxy = proxy
+        self.proxy_headers = proxy_headers or {}
+        assert self.proxy.scheme in ("http", "https"), \
+            'Not supported proxy scheme %s' % self.proxy.scheme
+        connection_pool_kw['_proxy'] = self.proxy
+        connection_pool_kw['_proxy_headers'] = self.proxy_headers
+        super(ProxyManager, self).__init__(
+            num_pools, headers, **connection_pool_kw)
+
+    def connection_from_host(self, host, port=None, scheme='http'):
+        if scheme == "https":
+            return super(ProxyManager, self).connection_from_host(
+                host, port, scheme)
+
+        return super(ProxyManager, self).connection_from_host(
+            self.proxy.host, self.proxy.port, self.proxy.scheme)
 
     def _set_proxy_headers(self, url, headers=None):
         """
         Sets headers needed by proxies: specifically, the Accept and Host
         headers. Only sets headers not provided by the user.
         """
         headers_ = {'Accept': '*/*'}
 
-        host = parse_url(url).host
-        if host:
-            headers_['Host'] = host
+        netloc = parse_url(url).netloc
+        if netloc:
+            headers_['Host'] = netloc
 
         if headers:
             headers_.update(headers)
-
         return headers_
 
-    def urlopen(self, method, url, **kw):
+    def urlopen(self, method, url, redirect=True, **kw):
         "Same as HTTP(S)ConnectionPool.urlopen, ``url`` must be absolute."
-        kw['assert_same_host'] = False
-        kw['headers'] = self._set_proxy_headers(url, headers=kw.get('headers'))
-        return self.proxy_pool.urlopen(method, url, **kw)
+        u = parse_url(url)
+
+        if u.scheme == "http":
+            # It's too late to set proxy headers on per-request basis for
+            # tunnelled HTTPS connections, should use
+            # constructor's proxy_headers instead.
+            kw['headers'] = self._set_proxy_headers(url, kw.get('headers',
+                                                                self.headers))
+            kw['headers'].update(self.proxy_headers)
+
+        return super(ProxyManager, self).urlopen(method, url, redirect, **kw)
 
 
-def proxy_from_url(url, **pool_kw):
-    proxy_pool = connection_from_url(url, **pool_kw)
-    return ProxyManager(proxy_pool)
+def proxy_from_url(url, **kw):
+    return ProxyManager(proxy_url=url, **kw)