Imported Upstream version 0.8.2

8 files changed, 1264 insertions, 0 deletions

diff --git a/requests/packages/urllib3/__init__.py b/requests/packages/urllib3/__init__.py
new file mode 100644
index 0000000..20b1fb4
--- /dev/null
+++ b/requests/packages/urllib3/__init__.py
@@ -0,0 +1,48 @@
+# urllib3/__init__.py
+# Copyright 2008-2011 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
+
+"""
+urllib3 - Thread-safe connection pooling and re-using.
+"""
+
+__author__ = 'Andrey Petrov (andrey.petrov@shazow.net)'
+__license__ = 'MIT'
+__version__ = '1.0.2'
+
+
+from .connectionpool import (
+    HTTPConnectionPool,
+    HTTPSConnectionPool,
+    connection_from_url,
+    get_host,
+    make_headers)
+
+
+from .exceptions import (
+    HTTPError,
+    MaxRetryError,
+    SSLError,
+    TimeoutError)
+
+from .poolmanager import PoolManager, ProxyManager, proxy_from_url
+from .response import HTTPResponse
+from .filepost import encode_multipart_formdata
+
+
+# Set default logging handler to avoid "No handler found" warnings.
+import logging
+try:
+    from logging import NullHandler
+except ImportError:
+    class NullHandler(logging.Handler):
+        def emit(self, record):
+            pass
+
+logging.getLogger(__name__).addHandler(NullHandler())
+
+# ... Clean up.
+del logging
+del NullHandler
diff --git a/requests/packages/urllib3/_collections.py b/requests/packages/urllib3/_collections.py
new file mode 100644
index 0000000..00b2cd5
--- /dev/null
+++ b/requests/packages/urllib3/_collections.py
@@ -0,0 +1,131 @@
+# urllib3/_collections.py
+# Copyright 2008-2011 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
+
+from collections import deque
+
+from threading import RLock
+
+__all__ = ['RecentlyUsedContainer']
+
+
+class AccessEntry(object):
+    __slots__ = ('key', 'is_valid')
+
+    def __init__(self, key, is_valid=True):
+        self.key = key
+        self.is_valid = is_valid
+
+
+class RecentlyUsedContainer(dict):
+    """
+    Provides a dict-like that maintains up to ``maxsize`` keys while throwing
+    away the least-recently-used keys beyond ``maxsize``.
+    """
+
+    # If len(self.access_log) exceeds self._maxsize * CLEANUP_FACTOR, then we
+    # will attempt to cleanup the invalidated entries in the access_log
+    # datastructure during the next 'get' operation.
+    CLEANUP_FACTOR = 10
+
+    def __init__(self, maxsize=10):
+        self._maxsize = maxsize
+
+        self._container = {}
+
+        # We use a deque to to store our keys ordered by the last access.
+        self.access_log = deque()
+        self.access_log_lock = RLock()
+
+        # We look up the access log entry by the key to invalidate it so we can
+        # insert a new authorative entry at the head without having to dig and
+        # find the old entry for removal immediately.
+        self.access_lookup = {}
+
+        # Trigger a heap cleanup when we get past this size
+        self.access_log_limit = maxsize * self.CLEANUP_FACTOR
+
+    def _invalidate_entry(self, key):
+        "If exists: Invalidate old entry and return it."
+        old_entry = self.access_lookup.get(key)
+        if old_entry:
+            old_entry.is_valid = False
+
+        return old_entry
+
+    def _push_entry(self, key):
+        "Push entry onto our access log, invalidate the old entry if exists."
+        self._invalidate_entry(key)
+
+        new_entry = AccessEntry(key)
+        self.access_lookup[key] = new_entry
+
+        self.access_log_lock.acquire()
+        self.access_log.appendleft(new_entry)
+        self.access_log_lock.release()
+
+    def _prune_entries(self, num):
+        "Pop entries from our access log until we popped ``num`` valid ones."
+        while num > 0:
+            self.access_log_lock.acquire()
+            p = self.access_log.pop()
+            self.access_log_lock.release()
+
+            if not p.is_valid:
+                continue # Invalidated entry, skip
+
+            dict.pop(self, p.key, None)
+            self.access_lookup.pop(p.key, None)
+            num -= 1
+
+    def _prune_invalidated_entries(self):
+        "Rebuild our access_log without the invalidated entries."
+        self.access_log_lock.acquire()
+        self.access_log = deque(e for e in self.access_log if e.is_valid)
+        self.access_log_lock.release()
+
+    def _get_ordered_access_keys(self):
+        "Return ordered access keys for inspection. Used for testing."
+        self.access_log_lock.acquire()
+        r = [e.key for e in self.access_log if e.is_valid]
+        self.access_log_lock.release()
+
+        return r
+
+    def __getitem__(self, key):
+        item = dict.get(self, key)
+
+        if not item:
+            raise KeyError(key)
+
+        # Insert new entry with new high priority, also implicitly invalidates
+        # the old entry.
+        self._push_entry(key)
+
+        if len(self.access_log) > self.access_log_limit:
+            # Heap is getting too big, try to clean up any tailing invalidated
+            # entries.
+            self._prune_invalidated_entries()
+
+        return item
+
+    def __setitem__(self, key, item):
+        # Add item to our container and access log
+        dict.__setitem__(self, key, item)
+        self._push_entry(key)
+
+        # Discard invalid and excess entries
+        self._prune_entries(len(self) - self._maxsize)
+
+    def __delitem__(self, key):
+        self._invalidate_entry(key)
+        self.access_lookup.pop(key, None)
+        dict.__delitem__(self, key)
+
+    def get(self, key, default=None):
+        try:
+            return self[key]
+        except KeyError:
+            return default
diff --git a/requests/packages/urllib3/connectionpool.py b/requests/packages/urllib3/connectionpool.py
new file mode 100644
index 0000000..8b10dc7
--- /dev/null
+++ b/requests/packages/urllib3/connectionpool.py
@@ -0,0 +1,525 @@
+# urllib3/connectionpool.py
+# Copyright 2008-2011 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
+import socket
+
+
+from httplib import HTTPConnection, HTTPSConnection, HTTPException
+from Queue import Queue, Empty, Full
+from select import select
+from socket import error as SocketError, timeout as SocketTimeout
+
+
+try:
+    import ssl
+    BaseSSLError = ssl.SSLError
+except ImportError:
+    ssl = None
+    BaseSSLError = None
+
+
+from .request import RequestMethods
+from .response import HTTPResponse
+from .exceptions import (
+    SSLError,
+    MaxRetryError,
+    TimeoutError,
+    HostChangedError,
+    EmptyPoolError,
+)
+
+
+log = logging.getLogger(__name__)
+
+_Default = object()
+
+
+## Connection objects (extension of httplib)
+
+class VerifiedHTTPSConnection(HTTPSConnection):
+    """
+    Based on httplib.HTTPSConnection but wraps the socket with
+    SSL certification.
+    """
+    cert_reqs = None
+    ca_certs = None
+
+    def set_cert(self, key_file=None, cert_file=None,
+                 cert_reqs='CERT_NONE', ca_certs=None):
+        ssl_req_scheme = {
+            'CERT_NONE': ssl.CERT_NONE,
+            'CERT_OPTIONAL': ssl.CERT_OPTIONAL,
+            'CERT_REQUIRED': ssl.CERT_REQUIRED
+        }
+
+        self.key_file = key_file
+        self.cert_file = cert_file
+        self.cert_reqs = ssl_req_scheme.get(cert_reqs) or ssl.CERT_NONE
+        self.ca_certs = ca_certs
+
+    def connect(self):
+        # Add certificate verification
+        sock = socket.create_connection((self.host, self.port), self.timeout)
+
+        # Wrap socket using verification with the root certs in
+        # trusted_root_certs
+        self.sock = ssl.wrap_socket(sock, self.key_file, self.cert_file,
+                                    cert_reqs=self.cert_reqs,
+                                    ca_certs=self.ca_certs)
+
+
+## Pool objects
+
+class ConnectionPool(object):
+    """
+    Base class for all connection pools, such as
+    :class:`.HTTPConnectionPool` and :class:`.HTTPSConnectionPool`.
+    """
+    pass
+
+
+class HTTPConnectionPool(ConnectionPool, RequestMethods):
+    """
+    Thread-safe connection pool for one host.
+
+    :param host:
+        Host used for this HTTP Connection (e.g. "localhost"), passed into
+        :class:`httplib.HTTPConnection`.
+
+    :param port:
+        Port used for this HTTP Connection (None is equivalent to 80), passed
+        into :class:`httplib.HTTPConnection`.
+
+    :param strict:
+        Causes BadStatusLine to be raised if the status line can't be parsed
+        as a valid HTTP/1.0 or 1.1 status line, passed into
+        :class:`httplib.HTTPConnection`.
+
+    :param timeout:
+        Socket timeout for each individual connection, can be a float. None
+        disables timeout.
+
+    :param maxsize:
+        Number of connections to save that can be reused. More than 1 is useful
+        in multithreaded situations. If ``block`` is set to false, more
+        connections will be created but they will not be saved once they've
+        been used.
+
+    :param block:
+        If set to True, no more than ``maxsize`` connections will be used at
+        a time. When no free connections are available, the call will block
+        until a connection has been released. This is a useful side effect for
+        particular multithreaded situations where one does not want to use more
+        than maxsize connections per host to prevent flooding.
+
+    :param headers:
+        Headers to include with all requests, unless other headers are given
+        explicitly.
+    """
+
+    scheme = 'http'
+
+    def __init__(self, host, port=None, strict=False, timeout=None, maxsize=1,
+                 block=False, headers=None):
+        self.host = host
+        self.port = port
+        self.strict = strict
+        self.timeout = timeout
+        self.pool = Queue(maxsize)
+        self.block = block
+        self.headers = headers or {}
+
+        # Fill the queue up so that doing get() on it will block properly
+        for _ in xrange(maxsize):
+            self.pool.put(None)
+
+        # These are mostly for testing and debugging purposes.
+        self.num_connections = 0
+        self.num_requests = 0
+
+    def _new_conn(self):
+        """
+        Return a fresh :class:`httplib.HTTPConnection`.
+        """
+        self.num_connections += 1
+        log.info("Starting new HTTP connection (%d): %s" %
+                 (self.num_connections, self.host))
+        return HTTPConnection(host=self.host, port=self.port)
+
+    def _get_conn(self, timeout=None):
+        """
+        Get a connection. Will return a pooled connection if one is available.
+
+        If no connections are available and :prop:`.block` is ``False``, then a
+        fresh connection is returned.
+
+        :param timeout:
+            Seconds to wait before giving up and raising
+            :class:`urllib3.exceptions.EmptyPoolError` if the pool is empty and
+            :prop:`.block` is ``True``.
+        """
+        conn = None
+        try:
+            conn = self.pool.get(block=self.block, timeout=timeout)
+
+            # If this is a persistent connection, check if it got disconnected
+            if conn and conn.sock and select([conn.sock], [], [], 0.0)[0]:
+                # Either data is buffered (bad), or the connection is dropped.
+                log.info("Resetting dropped connection: %s" % self.host)
+                conn.close()
+
+        except Empty:
+            if self.block:
+                raise EmptyPoolError("Pool reached maximum size and no more "
+                                     "connections are allowed.")
+            pass  # Oh well, we'll create a new connection then
+
+        return conn or self._new_conn()
+
+    def _put_conn(self, conn):
+        """
+        Put a connection back into the pool.
+
+        :param conn:
+            Connection object for the current host and port as returned by
+            :meth:`._new_conn` or :meth:`._get_conn`.
+
+        If the pool is already full, the connection is discarded because we
+        exceeded maxsize. If connections are discarded frequently, then maxsize
+        should be increased.
+        """
+        try:
+            self.pool.put(conn, block=False)
+        except Full:
+            # This should never happen if self.block == True
+            log.warning("HttpConnectionPool is full, discarding connection: %s"
+                        % self.host)
+
+    def _make_request(self, conn, method, url, timeout=_Default,
+                      **httplib_request_kw):
+        """
+        Perform a request on a given httplib connection object taken from our
+        pool.
+        """
+        self.num_requests += 1
+
+        if timeout is _Default:
+            timeout = self.timeout
+
+        conn.request(method, url, **httplib_request_kw)
+        conn.sock.settimeout(timeout)
+        httplib_response = conn.getresponse()
+
+        log.debug("\"%s %s %s\" %s %s" %
+                  (method, url,
+                   conn._http_vsn_str, # pylint: disable-msg=W0212
+                   httplib_response.status, httplib_response.length))
+
+        return httplib_response
+
+
+    def is_same_host(self, url):
+        """
+        Check if the given ``url`` is a member of the same host as this
+        conncetion pool.
+        """
+        # TODO: Add optional support for socket.gethostbyname checking.
+        return (url.startswith('/') or
+                get_host(url) == (self.scheme, self.host, self.port))
+
+    def urlopen(self, method, url, body=None, headers=None, retries=3,
+                redirect=True, assert_same_host=True, timeout=_Default,
+                pool_timeout=None, release_conn=None, **response_kw):
+        """
+        Get a connection from the pool and perform an HTTP request. This is the
+        lowest level call for making a request, so you'll need to specify all
+        the raw details.
+
+        .. note::
+
+           More commonly, it's appropriate to use a convenience method provided
+           by :class:`.RequestMethods`, such as :meth:`.request`.
+
+        :param method:
+            HTTP request method (such as GET, POST, PUT, etc.)
+
+        :param body:
+            Data to send in the request body (useful for creating
+            POST requests, see HTTPConnectionPool.post_url for
+            more convenience).
+
+        :param headers:
+            Dictionary of custom headers to send, such as User-Agent,
+            If-None-Match, etc. If None, pool headers are used. If provided,
+            these headers completely replace any pool-specific headers.
+
+        :param retries:
+            Number of retries to allow before raising a MaxRetryError exception.
+
+        :param redirect:
+            Automatically handle redirects (status codes 301, 302, 303, 307),
+            each redirect counts as a retry.
+
+        :param assert_same_host:
+            If ``True``, will make sure that the host of the pool requests is
+            consistent else will raise HostChangedError. When False, you can
+            use the pool on an HTTP proxy and request foreign hosts.
+
+        :param timeout:
+            If specified, overrides the default timeout for this one request.
+
+        :param pool_timeout:
+            If set and the pool is set to block=True, then this method will
+            block for ``pool_timeout`` seconds and raise EmptyPoolError if no
+            connection is available within the time period.
+
+        :param release_conn:
+            If False, then the urlopen call will not release the connection
+            back into the pool once a response is received. This is useful if
+            you're not preloading the response's content immediately. You will
+            need to call ``r.release_conn()`` on the response ``r`` to return
+            the connection back into the pool. If None, it takes the value of
+            ``response_kw.get('preload_content', True)``.
+
+        :param \**response_kw:
+            Additional parameters are passed to
+            :meth:`urllib3.response.HTTPResponse.from_httplib`
+        """
+        if headers is None:
+            headers = self.headers
+
+        if retries < 0:
+            raise MaxRetryError("Max retries exceeded for url: %s" % url)
+
+        if release_conn is None:
+            release_conn = response_kw.get('preload_content', True)
+
+        # Check host
+        if assert_same_host and not self.is_same_host(url):
+            host = "%s://%s" % (self.scheme, self.host)
+            if self.port:
+                host = "%s:%d" % (host, self.port)
+
+            raise HostChangedError("Connection pool with host '%s' tried to "
+                                   "open a foreign host: %s" % (host, url))
+
+        conn = None
+
+        try:
+            # Request a connection from the queue
+            # (Could raise SocketError: Bad file descriptor)
+            conn = self._get_conn(timeout=pool_timeout)
+
+            # Make the request on the httplib connection object
+            httplib_response = self._make_request(conn, method, url,
+                                                  timeout=timeout,
+                                                  body=body, headers=headers)
+
+            # If we're going to release the connection in ``finally:``, then
+            # the request doesn't need to know about the connection. Otherwise
+            # it will also try to release it and we'll have a double-release
+            # mess.
+            response_conn = not release_conn and conn
+
+            # Import httplib's response into our own wrapper object
+            response = HTTPResponse.from_httplib(httplib_response,
+                                                 pool=self,
+                                                 connection=response_conn,
+                                                 **response_kw)
+
+            # else:
+            #     The connection will be put back into the pool when
+            #     ``response.release_conn()`` is called (implicitly by
+            #     ``response.read()``)
+
+        except (SocketTimeout, Empty), e:
+            # Timed out either by socket or queue
+            raise TimeoutError("Request timed out after %s seconds" %
+                               self.timeout)
+
+        except (BaseSSLError), e:
+            # SSL certificate error
+            raise SSLError(e)
+
+        except (HTTPException, SocketError), e:
+            # Connection broken, discard. It will be replaced next _get_conn().
+            conn = None
+
+        finally:
+            if conn and release_conn:
+                # Put the connection back to be reused
+                self._put_conn(conn)
+
+        if not conn:
+            log.warn("Retrying (%d attempts remain) after connection "
+                     "broken by '%r': %s" % (retries, e, url))
+            return self.urlopen(method, url, body, headers, retries - 1,
+                                redirect, assert_same_host)  # Try again
+
+        # Handle redirection
+        if (redirect and
+            response.status in [301, 302, 303, 307] and
+            'location' in response.headers):  # Redirect, retry
+            log.info("Redirecting %s -> %s" %
+                     (url, response.headers.get('location')))
+            return self.urlopen(method, response.headers.get('location'), body,
+                                headers, retries - 1, redirect,
+                                assert_same_host)
+
+        return response
+
+
+class HTTPSConnectionPool(HTTPConnectionPool):
+    """
+    Same as :class:`.HTTPConnectionPool`, but HTTPS.
+
+    When Python is compiled with the :mod:`ssl` module, then
+    :class:`.VerifiedHTTPSConnection` is used, which *can* verify certificates,
+    instead of :class:httplib.HTTPSConnection`.
+
+    The ``key_file``, ``cert_file``, ``cert_reqs``, and ``ca_certs`` parameters
+    are only used if :mod:`ssl` is available and are fed into
+    :meth:`ssl.wrap_socket` to upgrade the connection socket into an SSL socket.
+    """
+
+    scheme = 'https'
+
+    def __init__(self, host, port=None,
+                 strict=False, timeout=None, maxsize=1,
+                 block=False, headers=None,
+                 key_file=None, cert_file=None,
+                 cert_reqs='CERT_NONE', ca_certs=None):
+
+        super(HTTPSConnectionPool, self).__init__(host, port,
+                                                  strict, timeout, maxsize,
+                                                  block, headers)
+        self.key_file = key_file
+        self.cert_file = cert_file
+        self.cert_reqs = cert_reqs
+        self.ca_certs = ca_certs
+
+    def _new_conn(self):
+        """
+        Return a fresh :class:`httplib.HTTPSConnection`.
+        """
+        self.num_connections += 1
+        log.info("Starting new HTTPS connection (%d): %s"
+                 % (self.num_connections, self.host))
+
+        if not ssl:
+            return HTTPSConnection(host=self.host, port=self.port)
+
+        connection = VerifiedHTTPSConnection(host=self.host, port=self.port)
+        connection.set_cert(key_file=self.key_file, cert_file=self.cert_file,
+                            cert_reqs=self.cert_reqs, ca_certs=self.ca_certs)
+        return connection
+
+
+## Helpers
+
+def make_headers(keep_alive=None, accept_encoding=None, user_agent=None,
+                 basic_auth=None):
+    """
+    Shortcuts for generating request headers.
+
+    :param keep_alive:
+        If ``True``, adds 'connection: keep-alive' header.
+
+    :param accept_encoding:
+        Can be a boolean, list, or string.
+        ``True`` translates to 'gzip,deflate'.
+        List will get joined by comma.
+        String will be used as provided.
+
+    :param user_agent:
+        String representing the user-agent you want, such as
+        "python-urllib3/0.6"
+
+    :param basic_auth:
+        Colon-separated username:password string for 'authorization: basic ...'
+        auth header.
+
+    Example: ::
+
+        >>> make_headers(keep_alive=True, user_agent="Batman/1.0")
+        {'connection': 'keep-alive', 'user-agent': 'Batman/1.0'}
+        >>> make_headers(accept_encoding=True)
+        {'accept-encoding': 'gzip,deflate'}
+    """
+    headers = {}
+    if accept_encoding:
+        if isinstance(accept_encoding, str):
+            pass
+        elif isinstance(accept_encoding, list):
+            accept_encoding = ','.join(accept_encoding)
+        else:
+            accept_encoding = 'gzip,deflate'
+        headers['accept-encoding'] = accept_encoding
+
+    if user_agent:
+        headers['user-agent'] = user_agent
+
+    if keep_alive:
+        headers['connection'] = 'keep-alive'
+
+    if basic_auth:
+        headers['authorization'] = 'Basic ' + \
+            basic_auth.encode('base64').strip()
+
+    return headers
+
+
+def get_host(url):
+    """
+    Given a url, return its scheme, host and port (None if it's not there).
+
+    For example: ::
+
+        >>> get_host('http://google.com/mail/')
+        ('http', 'google.com', None)
+        >>> get_host('google.com:80')
+        ('http', 'google.com', 80)
+    """
+    # This code is actually similar to urlparse.urlsplit, but much
+    # simplified for our needs.
+    port = None
+    scheme = 'http'
+    if '//' in url:
+        scheme, url = url.split('://', 1)
+    if '/' in url:
+        url, _path = url.split('/', 1)
+    if ':' in url:
+        url, port = url.split(':', 1)
+        port = int(port)
+    return scheme, url, port
+
+
+def connection_from_url(url, **kw):
+    """
+    Given a url, return an :class:`.ConnectionPool` instance of its host.
+
+    This is a shortcut for not having to parse out the scheme, host, and port
+    of the url before creating an :class:`.ConnectionPool` instance.
+
+    :param url:
+        Absolute URL string that must include the scheme. Port is optional.
+
+    :param \**kw:
+        Passes additional parameters to the constructor of the appropriate
+        :class:`.ConnectionPool`. Useful for specifying things like
+        timeout, maxsize, headers, etc.
+
+    Example: ::
+
+        >>> conn = connection_from_url('http://google.com/')
+        >>> r = conn.request('GET', '/')
+    """
+    scheme, host, port = get_host(url)
+    if scheme == 'https':
+        return HTTPSConnectionPool(host, port=port, **kw)
+    else:
+        return HTTPConnectionPool(host, port=port, **kw)
diff --git a/requests/packages/urllib3/exceptions.py b/requests/packages/urllib3/exceptions.py
new file mode 100644
index 0000000..69f459b
--- /dev/null
+++ b/requests/packages/urllib3/exceptions.py
@@ -0,0 +1,35 @@
+# urllib3/exceptions.py
+# Copyright 2008-2011 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
+
+## Exceptions
+
+class HTTPError(Exception):
+    "Base exception used by this module."
+    pass
+
+
+class SSLError(Exception):
+    "Raised when SSL certificate fails in an HTTPS connection."
+    pass
+
+
+class MaxRetryError(HTTPError):
+    "Raised when the maximum number of retries is exceeded."
+    pass
+
+
+class TimeoutError(HTTPError):
+    "Raised when a socket timeout occurs."
+    pass
+
+
+class HostChangedError(HTTPError):
+    "Raised when an existing pool gets a request for a foreign host."
+    pass
+
+class EmptyPoolError(HTTPError):
+    "Raised when a pool runs out of connections and no more are allowed."
+    pass
diff --git a/requests/packages/urllib3/filepost.py b/requests/packages/urllib3/filepost.py
new file mode 100644
index 0000000..2ffea8b
--- /dev/null
+++ b/requests/packages/urllib3/filepost.py
@@ -0,0 +1,71 @@
+# urllib3/filepost.py
+# Copyright 2008-2011 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 codecs
+import mimetools
+import mimetypes
+
+try:
+    from cStringIO import StringIO
+except ImportError:
+    from StringIO import StringIO # pylint: disable-msg=W0404
+
+
+writer = codecs.lookup('utf-8')[3]
+
+
+def get_content_type(filename):
+    return mimetypes.guess_type(filename)[0] or 'application/octet-stream'
+
+
+def encode_multipart_formdata(fields, boundary=None):
+    """
+    Encode a dictionary of ``fields`` using the multipart/form-data mime format.
+
+    :param fields:
+        Dictionary of fields. The key is treated as the field name, and the
+        value as the body of the form-data. If the value is a tuple of two
+        elements, then the first element is treated as the filename of the
+        form-data section.
+
+    :param boundary:
+        If not specified, then a random boundary will be generated using
+        :func:`mimetools.choose_boundary`.
+    """
+    body = StringIO()
+    if boundary is None:
+        boundary = mimetools.choose_boundary()
+
+    for fieldname, value in fields.iteritems():
+        body.write('--%s\r\n' % (boundary))
+
+        if isinstance(value, tuple):
+            filename, data = value
+            writer(body).write('Content-Disposition: form-data; name="%s"; '
+                               'filename="%s"\r\n' % (fieldname, filename))
+            body.write('Content-Type: %s\r\n\r\n' %
+                       (get_content_type(filename)))
+        else:
+            data = value
+            writer(body).write('Content-Disposition: form-data; name="%s"\r\n'
+                               % (fieldname))
+            body.write('Content-Type: text/plain\r\n\r\n')
+
+        if isinstance(data, int):
+            data = str(data)  # Backwards compatibility
+
+        if isinstance(data, unicode):
+            writer(body).write(data)
+        else:
+            body.write(data)
+
+        body.write('\r\n')
+
+    body.write('--%s--\r\n' % (boundary))
+
+    content_type = 'multipart/form-data; boundary=%s' % boundary
+
+    return body.getvalue(), content_type
diff --git a/requests/packages/urllib3/poolmanager.py b/requests/packages/urllib3/poolmanager.py
new file mode 100644
index 0000000..c08e327
--- /dev/null
+++ b/requests/packages/urllib3/poolmanager.py
@@ -0,0 +1,128 @@
+# urllib3/poolmanager.py
+# Copyright 2008-2011 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
+
+from ._collections import RecentlyUsedContainer
+from .connectionpool import (
+    HTTPConnectionPool, HTTPSConnectionPool,
+    get_host, connection_from_url,
+)
+
+
+__all__ = ['PoolManager', 'ProxyManager', 'proxy_from_url']
+
+
+from .request import RequestMethods
+from .connectionpool import HTTPConnectionPool, HTTPSConnectionPool
+
+
+pool_classes_by_scheme = {
+    'http': HTTPConnectionPool,
+    'https': HTTPSConnectionPool,
+}
+
+port_by_scheme = {
+    'http': 80,
+    'https': 443,
+}
+
+
+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 \**connection_pool_kw:
+        Additional parameters are used to create fresh
+        :class:`urllib3.connectionpool.ConnectionPool` instances.
+
+    Example: ::
+
+        >>> manager = PoolManager()
+        >>> r = manager.urlopen("http://google.com/")
+        >>> r = manager.urlopen("http://google.com/mail")
+        >>> r = manager.urlopen("http://yahoo.com/")
+        >>> len(r.pools)
+        2
+
+    """
+
+    # TODO: Make sure there are no memory leaks here.
+
+    def __init__(self, num_pools=10, **connection_pool_kw):
+        self.connection_pool_kw = connection_pool_kw
+        self.pools = RecentlyUsedContainer(num_pools)
+
+    def connection_from_host(self, host, port=80, scheme='http'):
+        """
+        Get a :class:`ConnectionPool` based on the host, port, and scheme.
+
+        Note that an appropriate ``port`` value is required here to normalize
+        connection pools in our container most effectively.
+        """
+        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
+
+        # Make a fresh ConnectionPool of the desired type
+        pool_cls = pool_classes_by_scheme[scheme]
+        pool = pool_cls(host, port, **self.connection_pool_kw)
+
+        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.
+        """
+        scheme, host, port = get_host(url)
+
+        port = port or port_by_scheme.get(scheme, 80)
+
+        return self.connection_from_host(host, port=port, scheme=scheme)
+
+    def urlopen(self, method, url, **kw):
+        """
+        Same as :meth:`urllib3.connectionpool.HTTPConnectionPool.urlopen`.
+
+        ``url`` must be absolute, such that an appropriate
+        :class:`urllib3.connectionpool.ConnectionPool` can be chosen for it.
+        """
+        conn = self.connection_from_url(url)
+        return conn.urlopen(method, url, assert_same_host=False, **kw)
+
+
+class ProxyManager(RequestMethods):
+    """
+    Given a ConnectionPool to a proxy, the ProxyManager's ``urlopen`` method
+    will make requests to any url through the defined proxy.
+    """
+
+    def __init__(self, proxy_pool):
+        self.proxy_pool = proxy_pool
+
+    def urlopen(self, method, url, **kw):
+        "Same as HTTP(S)ConnectionPool.urlopen, ``url`` must be absolute."
+        kw['assert_same_host'] = False
+        return self.proxy_pool.urlopen(method, url, **kw)
+
+
+def proxy_from_url(url, **pool_kw):
+    proxy_pool = connection_from_url(url, **pool_kw)
+    return ProxyManager(proxy_pool)
diff --git a/requests/packages/urllib3/request.py b/requests/packages/urllib3/request.py
new file mode 100644
index 0000000..a7e0b5d
--- /dev/null
+++ b/requests/packages/urllib3/request.py
@@ -0,0 +1,145 @@
+# urllib3/request.py
+# Copyright 2008-2011 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
+
+
+from urllib import urlencode
+
+from .filepost import encode_multipart_formdata
+
+
+__all__ = ['RequestMethods']
+
+
+class RequestMethods(object):
+    """
+    Convenience mixin for classes who implement a :meth:`urlopen` method, such
+    as :class:`~urllib3.connectionpool.HTTPConnectionPool` and
+    :class:`~urllib3.poolmanager.PoolManager`.
+
+    Provides behavior for making common types of HTTP request methods and
+    decides which type of request field encoding to use.
+
+    Specifically,
+
+    :meth:`.request_encode_url` is for sending requests whose fields are encoded
+    in the URL (such as GET, HEAD, DELETE).
+
+    :meth:`.request_encode_body` is for sending requests whose fields are
+    encoded in the *body* of the request using multipart or www-orm-urlencoded
+    (such as for POST, PUT, PATCH).
+
+    :meth:`.request` is for making any kind of request, it will look up the
+    appropriate encoding format and use one of the above two methods to make
+    the request.
+    """
+
+    _encode_url_methods = set(['DELETE', 'GET', 'HEAD', 'OPTIONS'])
+
+    _encode_body_methods = set(['PATCH', 'POST', 'PUT', 'TRACE'])
+
+    def urlopen(self, method, url, body=None, headers=None,
+                encode_multipart=True, multipart_boundary=None,
+                **kw):
+        raise NotImplemented("Classes extending RequestMethods must implement "
+                             "their own ``urlopen`` method.")
+
+    def request(self, method, url, fields=None, headers=None, **urlopen_kw):
+        """
+        Make a request using :meth:`urlopen` with the appropriate encoding of
+        ``fields`` based on the ``method`` used.
+
+        This is a convenience method that requires the least amount of manual
+        effort. It can be used in most situations, while still having the option
+        to drop down to more specific methods when necessary, such as
+        :meth:`request_encode_url`, :meth:`request_encode_body`,
+        or even the lowest level :meth:`urlopen`.
+        """
+        method = method.upper()
+
+        if method in self._encode_url_methods:
+            return self.request_encode_url(method, url, fields=fields,
+                                            headers=headers,
+                                            **urlopen_kw)
+        else:
+            return self.request_encode_body(method, url, fields=fields,
+                                             headers=headers,
+                                             **urlopen_kw)
+
+    def request_encode_url(self, method, url, fields=None, **urlopen_kw):
+        """
+        Make a request using :meth:`urlopen` with the ``fields`` encoded in
+        the url. This is useful for request methods like GET, HEAD, DELETE, etc.
+        """
+        if fields:
+            url += '?' + urlencode(fields)
+        return self.urlopen(method, url, **urlopen_kw)
+
+    def request_encode_body(self, method, url, fields=None, headers=None,
+                            encode_multipart=True, multipart_boundary=None,
+                            **urlopen_kw):
+        """
+        Make a request using :meth:`urlopen` with the ``fields`` encoded in
+        the body. This is useful for request methods like POST, PUT, PATCH, etc.
+
+        When ``encode_multipart=True`` (default), then
+        :meth:`urllib3.filepost.encode_multipart_formdata` is used to encode the
+        payload with the appropriate content type. Otherwise
+        :meth:`urllib.urlencode` is used with the
+        'application/x-www-form-urlencoded' content type.
+
+        Multipart encoding must be used when posting files, and it's reasonably
+        safe to use it in other times too. However, it may break request signing,
+        such as with OAuth.
+
+        Supports an optional ``fields`` parameter of key/value strings AND
+        key/filetuple. A filetuple is a (filename, data) tuple. For example: ::
+
+            fields = {
+                'foo': 'bar',
+                'fakefile': ('foofile.txt', 'contents of foofile'),
+                'realfile': ('barfile.txt', open('realfile').read()),
+                'nonamefile': ('contents of nonamefile field'),
+            }
+
+        When uploading a file, providing a filename (the first parameter of the
+        tuple) is optional but recommended to best mimick behavior of browsers.
+
+        Note that if ``headers`` are supplied, the 'Content-Type' header will be
+        overwritten because it depends on the dynamic random boundary string
+        which is used to compose the body of the request. The random boundary
+        string can be explicitly set with the ``multipart_boundary`` parameter.
+        """
+        if encode_multipart:
+            body, content_type = encode_multipart_formdata(fields or {},
+                                    boundary=multipart_boundary)
+        else:
+            body, content_type = (urlencode(fields or {}),
+                                    'application/x-www-form-urlencoded')
+
+        headers = headers or {}
+        headers.update({'Content-Type': content_type})
+
+        return self.urlopen(method, url, body=body, headers=headers,
+                            **urlopen_kw)
+
+    # Deprecated:
+
+    def get_url(self, url, fields=None, **urlopen_kw):
+        """
+        .. deprecated:: 1.0
+           Use :meth:`request` instead.
+        """
+        return self.request_encode_url('GET', url, fields=fields,
+                                       **urlopen_kw)
+
+    def post_url(self, url, fields=None, headers=None, **urlopen_kw):
+        """
+        .. deprecated:: 1.0
+           Use :meth:`request` instead.
+        """
+        return self.request_encode_body('POST', url, fields=fields,
+                                        headers=headers,
+                                        **urlopen_kw)
diff --git a/requests/packages/urllib3/response.py b/requests/packages/urllib3/response.py
new file mode 100644
index 0000000..4cd15c1
--- /dev/null
+++ b/requests/packages/urllib3/response.py
@@ -0,0 +1,181 @@
+# urllib3/response.py
+# Copyright 2008-2011 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 gzip
+import logging
+import zlib
+
+
+try:
+    from cStringIO import StringIO
+except ImportError:
+    from StringIO import StringIO # pylint: disable-msg=W0404
+
+
+from .exceptions import HTTPError
+
+
+log = logging.getLogger(__name__)
+
+
+def decode_gzip(data):
+    gzipper = gzip.GzipFile(fileobj=StringIO(data))
+    return gzipper.read()
+
+
+def decode_deflate(data):
+    try:
+        return zlib.decompress(data)
+    except zlib.error:
+        return zlib.decompress(data, -zlib.MAX_WBITS)
+
+
+class HTTPResponse(object):
+    """
+    HTTP Response container.
+
+    Backwards-compatible to httplib's HTTPResponse but the response ``body`` is
+    loaded and decoded on-demand when the ``data`` property is accessed.
+
+    Extra parameters for behaviour not present in httplib.HTTPResponse:
+
+    :param preload_content:
+        If True, the response's body will be preloaded during construction.
+
+    :param decode_content:
+        If True, attempts to decode specific content-encoding's based on headers
+        (like 'gzip' and 'deflate') will be skipped and raw data will be used
+        instead.
+
+    :param original_response:
+        When this HTTPResponse wrapper is generated from an httplib.HTTPResponse
+        object, it's convenient to include the original for debug purposes. It's
+        otherwise unused.
+    """
+
+    CONTENT_DECODERS = {
+        'gzip': decode_gzip,
+        'deflate': decode_deflate,
+    }
+
+    def __init__(self, body='', headers=None, status=0, version=0, reason=None,
+                 strict=0, preload_content=True, decode_content=True,
+                 original_response=None, pool=None, connection=None):
+        self.headers = headers or {}
+        self.status = status
+        self.version = version
+        self.reason = reason
+        self.strict = strict
+
+        self._decode_content = decode_content
+        self._body = None
+        self._fp = None
+        self._original_response = original_response
+
+        self._pool = pool
+        self._connection = connection
+
+        if hasattr(body, 'read'):
+            self._fp = body
+
+        if preload_content:
+            self._body = self.read(decode_content=decode_content)
+
+    def release_conn(self):
+        if not self._pool or not self._connection:
+            return
+
+        self._pool._put_conn(self._connection)
+        self._connection = None
+
+    @property
+    def data(self):
+        # For backwords-compat with earlier urllib3 0.4 and earlier.
+        if self._body:
+            return self._body
+
+        if self._fp:
+            return self.read(decode_content=self._decode_content,
+                             cache_content=True)
+
+    def read(self, amt=None, decode_content=True, cache_content=False):
+        """
+        Similar to :meth:`httplib.HTTPResponse.read`, but with two additional
+        parameters: ``decode_content`` and ``cache_content``.
+
+        :param amt:
+            How much of the content to read. If specified, decoding and caching
+            is skipped because we can't decode partial content nor does it make
+            sense to cache partial content as the full response.
+
+        :param decode_content:
+            If True, will attempt to decode the body based on the
+            'content-encoding' header. (Overridden if ``amt`` is set.)
+
+        :param cache_content:
+            If True, will save the returned data such that the same result is
+            returned despite of the state of the underlying file object. This
+            is useful if you want the ``.data`` property to continue working
+            after having ``.read()`` the file object. (Overridden if ``amt`` is
+            set.)
+        """
+        content_encoding = self.headers.get('content-encoding')
+        decoder = self.CONTENT_DECODERS.get(content_encoding)
+
+        data = self._fp and self._fp.read(amt)
+
+        try:
+
+            if amt:
+                return data
+
+            if not decode_content or not decoder:
+                if cache_content:
+                    self._body = data
+
+                return data
+
+            try:
+                data = decoder(data)
+            except IOError:
+                raise HTTPError("Received response with content-encoding: %s, but "
+                                "failed to decode it." % content_encoding)
+
+            if cache_content:
+                self._body = data
+
+            return data
+
+        finally:
+
+            if self._original_response and self._original_response.isclosed():
+                self.release_conn()
+
+    @staticmethod
+    def from_httplib(r, **response_kw):
+        """
+        Given an :class:`httplib.HTTPResponse` instance ``r``, return a
+        corresponding :class:`urllib3.response.HTTPResponse` object.
+
+        Remaining parameters are passed to the HTTPResponse constructor, along
+        with ``original_response=r``.
+        """
+
+        return HTTPResponse(body=r,
+                            headers=dict(r.getheaders()),
+                            status=r.status,
+                            version=r.version,
+                            reason=r.reason,
+                            strict=r.strict,
+                            original_response=r,
+                            **response_kw)
+
+    # Backwards-compatibility methods for httplib.HTTPResponse
+    def getheaders(self):
+        return self.headers
+
+    def getheader(self, name, default=None):
+        return self.headers.get(name, default)