Coverage for requests.packages.urllib3.poolmanager : 51%

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# urllib3/poolmanager.py # Copyright 2008-2014 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
'http': HTTPConnectionPool, 'https': HTTPSConnectionPool, }
'ssl_version')
""" 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
"""
dispose_func=lambda p: p.close())
""" Create a new :class:`ConnectionPool` based on host, port and scheme.
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. """
""" 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. """ self.pools.clear()
""" 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 the scheme, host, or port doesn't match existing open # connections, open a new ConnectionPool. return pool
# Make a fresh ConnectionPool of the desired type
""" 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. """
""" 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. """ 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
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)
""" 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 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
"""
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)
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)
""" Sets headers needed by proxies: specifically, the Accept and Host headers. Only sets headers not provided by the user. """ headers_ = {'Accept': '*/*'}
netloc = parse_url(url).netloc if netloc: headers_['Host'] = netloc
if headers: headers_.update(headers) return headers_
"Same as HTTP(S)ConnectionPool.urlopen, ``url`` must be absolute." u = parse_url(url)
if u.scheme == "http": # For proxied HTTPS requests, httplib sets the necessary headers # on the CONNECT to the proxy. For HTTP, we'll definitely # need to set 'Host' at the very least. kw['headers'] = self._set_proxy_headers(url, kw.get('headers', self.headers))
return super(ProxyManager, self).urlopen(method, url, redirect, **kw)
return ProxyManager(proxy_url=url, **kw) |