Delete swarm_client.

swarm_client/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 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,
-}
-
-log = logging.getLogger(__name__)
-
-SSL_KEYWORDS = ('key_file', 'cert_file', 'cert_reqs', 'ca_certs',
-                'ssl_version')
-
-
-class PoolManager(RequestMethods):
-    """
-    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
-
-    """
-
-    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.
-
-        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.
-        """
-        pool_cls = pool_classes_by_scheme[scheme]
-        kwargs = self.connection_pool_kw
-        if scheme == 'http':
-            kwargs = self.connection_pool_kw.copy()
-            for kw in SSL_KEYWORDS:
-                kwargs.pop(kw, None)
-
-        return pool_cls(host, port, **kwargs)
-
-    def clear(self):
-        """
-        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()
-
-    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)
-
-        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
-        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.
-        """
-        u = parse_url(url)
-        return self.connection_from_host(u.host, port=u.port, scheme=u.scheme)
-
-    def urlopen(self, method, url, redirect=True, **kw):
-        """
-        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)
-
-
-class ProxyManager(PoolManager):
-    """
-    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_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': '*/*'}
-
-        netloc = parse_url(url).netloc
-        if netloc:
-            headers_['Host'] = netloc
-
-        if headers:
-            headers_.update(headers)
-        return headers_
-
-    def urlopen(self, method, url, redirect=True, **kw):
-        "Same as HTTP(S)ConnectionPool.urlopen, ``url`` must be absolute."
-        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, **kw):
-    return ProxyManager(proxy_url=url, **kw)