update deps

13 files changed, 114 insertions, 89 deletions

diff --git a/libs/requests/__init__.py b/libs/requests/__init__.py
index a5b3c9c33..bc168ee53 100644
--- a/libs/requests/__init__.py
+++ b/libs/requests/__init__.py
@@ -22,7 +22,7 @@ usage:
 ... or POST:
 
    >>> payload = dict(key1='value1', key2='value2')
-   >>> r = requests.post('http://httpbin.org/post', data=payload)
+   >>> r = requests.post('https://httpbin.org/post', data=payload)
    >>> print(r.text)
    {
      ...
@@ -57,10 +57,10 @@ def check_compatibility(urllib3_version, chardet_version):
     # Check urllib3 for compatibility.
     major, minor, patch = urllib3_version  # noqa: F811
     major, minor, patch = int(major), int(minor), int(patch)
-    # urllib3 >= 1.21.1, <= 1.23
+    # urllib3 >= 1.21.1, <= 1.24
     assert major == 1
     assert minor >= 21
-    assert minor <= 23
+    assert minor <= 24
 
     # Check chardet for compatibility.
     major, minor, patch = chardet_version.split('.')[:3]
@@ -79,14 +79,14 @@ def _check_cryptography(cryptography_version):
         return
 
     if cryptography_version < [1, 3, 4]:
-        warning = 'Old version of cryptography ({0}) may cause slowdown.'.format(cryptography_version)
+        warning = 'Old version of cryptography ({}) may cause slowdown.'.format(cryptography_version)
         warnings.warn(warning, RequestsDependencyWarning)
 
 # Check imported dependencies for compatibility.
 try:
     check_compatibility(urllib3.__version__, chardet.__version__)
 except (AssertionError, ValueError):
-    warnings.warn("urllib3 ({0}) or chardet ({1}) doesn't match a supported "
+    warnings.warn("urllib3 ({}) or chardet ({}) doesn't match a supported "
                   "version!".format(urllib3.__version__, chardet.__version__),
                   RequestsDependencyWarning)
 
@@ -123,12 +123,7 @@ from .exceptions import (
 
 # Set default logging handler to avoid "No handler found" warnings.
 import logging
-try:  # Python 2.7+
-    from logging import NullHandler
-except ImportError:
-    class NullHandler(logging.Handler):
-        def emit(self, record):
-            pass
+from logging import NullHandler
 
 logging.getLogger(__name__).addHandler(NullHandler())
 
diff --git a/libs/requests/__version__.py b/libs/requests/__version__.py
index ef61ec0f5..be8a45fe0 100644
--- a/libs/requests/__version__.py
+++ b/libs/requests/__version__.py
@@ -5,8 +5,8 @@
 __title__ = 'requests'
 __description__ = 'Python HTTP for Humans.'
 __url__ = 'http://python-requests.org'
-__version__ = '2.19.1'
-__build__ = 0x021901
+__version__ = '2.20.0'
+__build__ = 0x022000
 __author__ = 'Kenneth Reitz'
 __author_email__ = '[email protected]'
 __license__ = 'Apache 2.0'
diff --git a/libs/requests/adapters.py b/libs/requests/adapters.py
index a4b028420..fa4d9b3cc 100644
--- a/libs/requests/adapters.py
+++ b/libs/requests/adapters.py
@@ -26,6 +26,7 @@ from urllib3.exceptions import ProtocolError
 from urllib3.exceptions import ReadTimeoutError
 from urllib3.exceptions import SSLError as _SSLError
 from urllib3.exceptions import ResponseError
+from urllib3.exceptions import LocationValueError
 
 from .models import Response
 from .compat import urlparse, basestring
@@ -35,7 +36,8 @@ from .utils import (DEFAULT_CA_BUNDLE_PATH, extract_zipped_paths,
 from .structures import CaseInsensitiveDict
 from .cookies import extract_cookies_to_jar
 from .exceptions import (ConnectionError, ConnectTimeout, ReadTimeout, SSLError,
-                         ProxyError, RetryError, InvalidSchema, InvalidProxyURL)
+                         ProxyError, RetryError, InvalidSchema, InvalidProxyURL,
+                         InvalidURL)
 from .auth import _basic_auth_str
 
 try:
@@ -127,8 +129,7 @@ class HTTPAdapter(BaseAdapter):
         self.init_poolmanager(pool_connections, pool_maxsize, block=pool_block)
 
     def __getstate__(self):
-        return dict((attr, getattr(self, attr, None)) for attr in
-                    self.__attrs__)
+        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
 
     def __setstate__(self, state):
         # Can't handle by adding 'proxy_manager' to self.__attrs__ because
@@ -224,7 +225,7 @@ class HTTPAdapter(BaseAdapter):
 
             if not cert_loc or not os.path.exists(cert_loc):
                 raise IOError("Could not find a suitable TLS CA certificate bundle, "
-                              "invalid path: {0}".format(cert_loc))
+                              "invalid path: {}".format(cert_loc))
 
             conn.cert_reqs = 'CERT_REQUIRED'
 
@@ -246,10 +247,10 @@ class HTTPAdapter(BaseAdapter):
                 conn.key_file = None
             if conn.cert_file and not os.path.exists(conn.cert_file):
                 raise IOError("Could not find the TLS certificate file, "
-                              "invalid path: {0}".format(conn.cert_file))
+                              "invalid path: {}".format(conn.cert_file))
             if conn.key_file and not os.path.exists(conn.key_file):
                 raise IOError("Could not find the TLS key file, "
-                              "invalid path: {0}".format(conn.key_file))
+                              "invalid path: {}".format(conn.key_file))
 
     def build_response(self, req, resp):
         """Builds a :class:`Response <requests.Response>` object from a urllib3
@@ -378,7 +379,7 @@ class HTTPAdapter(BaseAdapter):
         when subclassing the
         :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
 
-        :param proxies: The url of the proxy being used for this request.
+        :param proxy: The url of the proxy being used for this request.
         :rtype: dict
         """
         headers = {}
@@ -407,7 +408,10 @@ class HTTPAdapter(BaseAdapter):
         :rtype: requests.Response
         """
 
-        conn = self.get_connection(request.url, proxies)
+        try:
+            conn = self.get_connection(request.url, proxies)
+        except LocationValueError as e:
+            raise InvalidURL(e, request=request)
 
         self.cert_verify(conn, request.url, verify, cert)
         url = self.request_url(request, proxies)
@@ -421,7 +425,7 @@ class HTTPAdapter(BaseAdapter):
                 timeout = TimeoutSauce(connect=connect, read=read)
             except ValueError as e:
                 # this may raise a string formatting error.
-                err = ("Invalid timeout {0}. Pass a (connect, read) "
+                err = ("Invalid timeout {}. Pass a (connect, read) "
                        "timeout tuple, or a single float to set "
                        "both timeouts to the same value".format(timeout))
                 raise ValueError(err)
@@ -471,11 +475,10 @@ class HTTPAdapter(BaseAdapter):
 
                     # Receive the response from the server
                     try:
-                        # For Python 2.7+ versions, use buffering of HTTP
-                        # responses
+                        # For Python 2.7, use buffering of HTTP responses
                         r = low_conn.getresponse(buffering=True)
                     except TypeError:
-                        # For compatibility with Python 2.6 versions and back
+                        # For compatibility with Python 3.3+
                         r = low_conn.getresponse()
 
                     resp = HTTPResponse.from_httplib(
diff --git a/libs/requests/api.py b/libs/requests/api.py
index a2cc84d76..abada96d4 100644
--- a/libs/requests/api.py
+++ b/libs/requests/api.py
@@ -18,8 +18,10 @@ def request(method, url, **kwargs):
 
     :param method: method for the new :class:`Request` object.
     :param url: URL for the new :class:`Request` object.
-    :param params: (optional) Dictionary or bytes to be sent in the query string for the :class:`Request`.
-    :param data: (optional) Dictionary or list of tuples ``[(key, value)]`` (will be form-encoded), bytes, or file-like object to send in the body of the :class:`Request`.
+    :param params: (optional) Dictionary, list of tuples or bytes to send
+        in the body of the :class:`Request`.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
     :param json: (optional) A JSON serializable Python object to send in the body of the :class:`Request`.
     :param headers: (optional) Dictionary of HTTP Headers to send with the :class:`Request`.
     :param cookies: (optional) Dict or CookieJar object to send with the :class:`Request`.
@@ -47,7 +49,7 @@ def request(method, url, **kwargs):
     Usage::
 
       >>> import requests
-      >>> req = requests.request('GET', 'http://httpbin.org/get')
+      >>> req = requests.request('GET', 'https://httpbin.org/get')
       <Response [200]>
     """
 
@@ -62,7 +64,8 @@ def get(url, params=None, **kwargs):
     r"""Sends a GET request.
 
     :param url: URL for the new :class:`Request` object.
-    :param params: (optional) Dictionary or bytes to be sent in the query string for the :class:`Request`.
+    :param params: (optional) Dictionary, list of tuples or bytes to send
+        in the body of the :class:`Request`.
     :param \*\*kwargs: Optional arguments that ``request`` takes.
     :return: :class:`Response <Response>` object
     :rtype: requests.Response
@@ -102,7 +105,8 @@ def post(url, data=None, json=None, **kwargs):
     r"""Sends a POST request.
 
     :param url: URL for the new :class:`Request` object.
-    :param data: (optional) Dictionary (will be form-encoded), bytes, or file-like object to send in the body of the :class:`Request`.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
     :param json: (optional) json data to send in the body of the :class:`Request`.
     :param \*\*kwargs: Optional arguments that ``request`` takes.
     :return: :class:`Response <Response>` object
@@ -116,7 +120,8 @@ def put(url, data=None, **kwargs):
     r"""Sends a PUT request.
 
     :param url: URL for the new :class:`Request` object.
-    :param data: (optional) Dictionary (will be form-encoded), bytes, or file-like object to send in the body of the :class:`Request`.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
     :param json: (optional) json data to send in the body of the :class:`Request`.
     :param \*\*kwargs: Optional arguments that ``request`` takes.
     :return: :class:`Response <Response>` object
@@ -130,7 +135,8 @@ def patch(url, data=None, **kwargs):
     r"""Sends a PATCH request.
 
     :param url: URL for the new :class:`Request` object.
-    :param data: (optional) Dictionary (will be form-encoded), bytes, or file-like object to send in the body of the :class:`Request`.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
     :param json: (optional) json data to send in the body of the :class:`Request`.
     :param \*\*kwargs: Optional arguments that ``request`` takes.
     :return: :class:`Response <Response>` object
diff --git a/libs/requests/auth.py b/libs/requests/auth.py
index 4ae459474..bdde51c7f 100644
--- a/libs/requests/auth.py
+++ b/libs/requests/auth.py
@@ -38,7 +38,7 @@ def _basic_auth_str(username, password):
     if not isinstance(username, basestring):
         warnings.warn(
             "Non-string usernames will no longer be supported in Requests "
-            "3.0.0. Please convert the object you've passed in ({0!r}) to "
+            "3.0.0. Please convert the object you've passed in ({!r}) to "
             "a string or bytes object in the near future to avoid "
             "problems.".format(username),
             category=DeprecationWarning,
@@ -48,7 +48,7 @@ def _basic_auth_str(username, password):
     if not isinstance(password, basestring):
         warnings.warn(
             "Non-string passwords will no longer be supported in Requests "
-            "3.0.0. Please convert the object you've passed in ({0!r}) to "
+            "3.0.0. Please convert the object you've passed in ({!r}) to "
             "a string or bytes object in the near future to avoid "
             "problems.".format(password),
             category=DeprecationWarning,
diff --git a/libs/requests/compat.py b/libs/requests/compat.py
index 6b9c6facb..c44b35efb 100644
--- a/libs/requests/compat.py
+++ b/libs/requests/compat.py
@@ -43,9 +43,8 @@ if is_py2:
     import cookielib
     from Cookie import Morsel
     from StringIO import StringIO
-    from collections import Callable, Mapping, MutableMapping
+    from collections import Callable, Mapping, MutableMapping, OrderedDict
 
-    from urllib3.packages.ordered_dict import OrderedDict
 
     builtin_str = str
     bytes = str
diff --git a/libs/requests/cookies.py b/libs/requests/cookies.py
index 50883a84f..56fccd9c2 100644
--- a/libs/requests/cookies.py
+++ b/libs/requests/cookies.py
@@ -444,20 +444,21 @@ def create_cookie(name, value, **kwargs):
     By default, the pair of `name` and `value` will be set for the domain ''
     and sent on every request (this is sometimes called a "supercookie").
     """
-    result = dict(
-        version=0,
-        name=name,
-        value=value,
-        port=None,
-        domain='',
-        path='/',
-        secure=False,
-        expires=None,
-        discard=True,
-        comment=None,
-        comment_url=None,
-        rest={'HttpOnly': None},
-        rfc2109=False,)
+    result = {
+        'version': 0,
+        'name': name,
+        'value': value,
+        'port': None,
+        'domain': '',
+        'path': '/',
+        'secure': False,
+        'expires': None,
+        'discard': True,
+        'comment': None,
+        'comment_url': None,
+        'rest': {'HttpOnly': None},
+        'rfc2109': False,
+    }
 
     badargs = set(kwargs) - set(result)
     if badargs:
@@ -511,6 +512,7 @@ def cookiejar_from_dict(cookie_dict, cookiejar=None, overwrite=True):
     :param cookiejar: (optional) A cookiejar to add the cookies to.
     :param overwrite: (optional) If False, will not replace cookies
         already in the jar with new ones.
+    :rtype: CookieJar
     """
     if cookiejar is None:
         cookiejar = RequestsCookieJar()
@@ -529,6 +531,7 @@ def merge_cookies(cookiejar, cookies):
 
     :param cookiejar: CookieJar object to add the cookies to.
     :param cookies: Dictionary or CookieJar object to be added.
+    :rtype: CookieJar
     """
     if not isinstance(cookiejar, cookielib.CookieJar):
         raise ValueError('You can only merge into CookieJar')
diff --git a/libs/requests/help.py b/libs/requests/help.py
index 06e06b2a7..e53d35ef6 100644
--- a/libs/requests/help.py
+++ b/libs/requests/help.py
@@ -89,8 +89,7 @@ def info():
         'version': getattr(idna, '__version__', ''),
     }
 
-    # OPENSSL_VERSION_NUMBER doesn't exist in the Python 2.6 ssl module.
-    system_ssl = getattr(ssl, 'OPENSSL_VERSION_NUMBER', None)
+    system_ssl = ssl.OPENSSL_VERSION_NUMBER
     system_ssl_info = {
         'version': '%x' % system_ssl if system_ssl is not None else ''
     }
diff --git a/libs/requests/hooks.py b/libs/requests/hooks.py
index 32b32de75..7a51f212c 100644
--- a/libs/requests/hooks.py
+++ b/libs/requests/hooks.py
@@ -15,14 +15,14 @@ HOOKS = ['response']
 
 
 def default_hooks():
-    return dict((event, []) for event in HOOKS)
+    return {event: [] for event in HOOKS}
 
 # TODO: response is the only one
 
 
 def dispatch_hook(key, hooks, hook_data, **kwargs):
     """Dispatches a hook dictionary on a given piece of data."""
-    hooks = hooks or dict()
+    hooks = hooks or {}
     hooks = hooks.get(key)
     if hooks:
         if hasattr(hooks, '__call__'):
diff --git a/libs/requests/models.py b/libs/requests/models.py
index 3d0e1f42a..3dded57ef 100644
--- a/libs/requests/models.py
+++ b/libs/requests/models.py
@@ -204,9 +204,13 @@ class Request(RequestHooksMixin):
     :param url: URL to send.
     :param headers: dictionary of headers to send.
     :param files: dictionary of {filename: fileobject} files to multipart upload.
-    :param data: the body to attach to the request. If a dictionary is provided, form-encoding will take place.
+    :param data: the body to attach to the request. If a dictionary or
+        list of tuples ``[(key, value)]`` is provided, form-encoding will
+        take place.
     :param json: json for the body to attach to the request (if files or data is not specified).
-    :param params: dictionary of URL parameters to append to the URL.
+    :param params: URL parameters to append to the URL. If a dictionary or
+        list of tuples ``[(key, value)]`` is provided, form-encoding will
+        take place.
     :param auth: Auth handler or (user, pass) tuple.
     :param cookies: dictionary or CookieJar of cookies to attach to this request.
     :param hooks: dictionary of callback hooks, for internal usage.
@@ -214,7 +218,7 @@ class Request(RequestHooksMixin):
     Usage::
 
       >>> import requests
-      >>> req = requests.Request('GET', 'http://httpbin.org/get')
+      >>> req = requests.Request('GET', 'https://httpbin.org/get')
       >>> req.prepare()
       <PreparedRequest [GET]>
     """
@@ -274,7 +278,7 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
     Usage::
 
       >>> import requests
-      >>> req = requests.Request('GET', 'http://httpbin.org/get')
+      >>> req = requests.Request('GET', 'https://httpbin.org/get')
       >>> r = req.prepare()
       <PreparedRequest [GET]>
 
@@ -648,10 +652,7 @@ class Response(object):
         if not self._content_consumed:
             self.content
 
-        return dict(
-            (attr, getattr(self, attr, None))
-            for attr in self.__attrs__
-        )
+        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
 
     def __setstate__(self, state):
         for name, value in state.items():
diff --git a/libs/requests/sessions.py b/libs/requests/sessions.py
index ba135268a..a448bd83f 100644
--- a/libs/requests/sessions.py
+++ b/libs/requests/sessions.py
@@ -115,6 +115,22 @@ class SessionRedirectMixin(object):
             return to_native_string(location, 'utf8')
         return None
 
+    def should_strip_auth(self, old_url, new_url):
+        """Decide whether Authorization header should be removed when redirecting"""
+        old_parsed = urlparse(old_url)
+        new_parsed = urlparse(new_url)
+        if old_parsed.hostname != new_parsed.hostname:
+            return True
+        # Special case: allow http -> https redirect when using the standard
+        # ports. This isn't specified by RFC 7235, but is kept to avoid
+        # breaking backwards compatibility with older versions of requests
+        # that allowed any redirects on the same host.
+        if (old_parsed.scheme == 'http' and old_parsed.port in (80, None)
+                and new_parsed.scheme == 'https' and new_parsed.port in (443, None)):
+            return False
+        # Standard case: root URI must match
+        return old_parsed.port != new_parsed.port or old_parsed.scheme != new_parsed.scheme
+
     def resolve_redirects(self, resp, req, stream=False, timeout=None,
                           verify=True, cert=None, proxies=None, yield_requests=False, **adapter_kwargs):
         """Receives a Response. Returns a generator of Responses or Requests."""
@@ -236,14 +252,10 @@ class SessionRedirectMixin(object):
         headers = prepared_request.headers
         url = prepared_request.url
 
-        if 'Authorization' in headers:
+        if 'Authorization' in headers and self.should_strip_auth(response.request.url, url):
             # If we get redirected to a new host, we should strip out any
             # authentication headers.
-            original_parsed = urlparse(response.request.url)
-            redirect_parsed = urlparse(url)
-
-            if (original_parsed.hostname != redirect_parsed.hostname):
-                del headers['Authorization']
+            del headers['Authorization']
 
         # .netrc might have more auth for us on our new host.
         new_auth = get_netrc_auth(url) if self.trust_env else None
@@ -299,7 +311,7 @@ class SessionRedirectMixin(object):
         """
         method = prepared_request.method
 
-        # http://tools.ietf.org/html/rfc7231#section-6.4.4
+        # https://tools.ietf.org/html/rfc7231#section-6.4.4
         if response.status_code == codes.see_other and method != 'HEAD':
             method = 'GET'
 
@@ -325,13 +337,13 @@ class Session(SessionRedirectMixin):
 
       >>> import requests
       >>> s = requests.Session()
-      >>> s.get('http://httpbin.org/get')
+      >>> s.get('https://httpbin.org/get')
       <Response [200]>
 
     Or as a context manager::
 
       >>> with requests.Session() as s:
-      >>>     s.get('http://httpbin.org/get')
+      >>>     s.get('https://httpbin.org/get')
       <Response [200]>
     """
 
@@ -453,8 +465,8 @@ class Session(SessionRedirectMixin):
         :param url: URL for the new :class:`Request` object.
         :param params: (optional) Dictionary or bytes to be sent in the query
             string for the :class:`Request`.
-        :param data: (optional) Dictionary, bytes, or file-like object to send
-            in the body of the :class:`Request`.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
         :param json: (optional) json to send in the body of the
             :class:`Request`.
         :param headers: (optional) Dictionary of HTTP Headers to send with the
@@ -550,7 +562,8 @@ class Session(SessionRedirectMixin):
         r"""Sends a POST request. Returns :class:`Response` object.
 
         :param url: URL for the new :class:`Request` object.
-        :param data: (optional) Dictionary, bytes, or file-like object to send in the body of the :class:`Request`.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
         :param json: (optional) json to send in the body of the :class:`Request`.
         :param \*\*kwargs: Optional arguments that ``request`` takes.
         :rtype: requests.Response
@@ -562,7 +575,8 @@ class Session(SessionRedirectMixin):
         r"""Sends a PUT request. Returns :class:`Response` object.
 
         :param url: URL for the new :class:`Request` object.
-        :param data: (optional) Dictionary, bytes, or file-like object to send in the body of the :class:`Request`.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
         :param \*\*kwargs: Optional arguments that ``request`` takes.
         :rtype: requests.Response
         """
@@ -573,7 +587,8 @@ class Session(SessionRedirectMixin):
         r"""Sends a PATCH request. Returns :class:`Response` object.
 
         :param url: URL for the new :class:`Request` object.
-        :param data: (optional) Dictionary, bytes, or file-like object to send in the body of the :class:`Request`.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
         :param \*\*kwargs: Optional arguments that ``request`` takes.
         :rtype: requests.Response
         """
@@ -723,7 +738,7 @@ class Session(SessionRedirectMixin):
             self.adapters[key] = self.adapters.pop(key)
 
     def __getstate__(self):
-        state = dict((attr, getattr(self, attr, None)) for attr in self.__attrs__)
+        state = {attr: getattr(self, attr, None) for attr in self.__attrs__}
         return state
 
     def __setstate__(self, state):
@@ -735,7 +750,12 @@ def session():
     """
     Returns a :class:`Session` for context-management.
 
+    .. deprecated:: 1.0.0
+
+        This method has been deprecated since version 1.0.0 and is only kept for
+        backwards compatibility. New code should use :class:`~requests.sessions.Session`
+        to create a session. This may be removed at a future date.
+
     :rtype: Session
     """
-
     return Session()
diff --git a/libs/requests/status_codes.py b/libs/requests/status_codes.py
index ff462c6c6..813e8c4e6 100644
--- a/libs/requests/status_codes.py
+++ b/libs/requests/status_codes.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-"""
+r"""
 The ``codes`` object defines a mapping from common names for HTTP statuses
 to their numerical codes, accessible either as attributes or as dictionary
 items.
diff --git a/libs/requests/utils.py b/libs/requests/utils.py
index 431f6be07..0ce7fe115 100644
--- a/libs/requests/utils.py
+++ b/libs/requests/utils.py
@@ -173,10 +173,10 @@ def get_netrc_auth(url, raise_errors=False):
 
         for f in NETRC_FILES:
             try:
-                loc = os.path.expanduser('~/{0}'.format(f))
+                loc = os.path.expanduser('~/{}'.format(f))
             except KeyError:
                 # os.path.expanduser can fail when $HOME is undefined and
-                # getpwuid fails. See http://bugs.python.org/issue20164 &
+                # getpwuid fails. See https://bugs.python.org/issue20164 &
                 # https://github.com/requests/requests/issues/1846
                 return
 
@@ -466,7 +466,7 @@ def _parse_content_type_header(header):
             if index_of_equals != -1:
                 key = param[:index_of_equals].strip(items_to_strip)
                 value = param[index_of_equals + 1:].strip(items_to_strip)
-            params_dict[key] = value
+            params_dict[key.lower()] = value
     return content_type, params_dict
 
 
@@ -706,6 +706,10 @@ def should_bypass_proxies(url, no_proxy):
         no_proxy = get_proxy('no_proxy')
     parsed = urlparse(url)
 
+    if parsed.hostname is None:
+        # URLs don't always have hostnames, e.g. file:/// urls.
+        return True
+
     if no_proxy:
         # We need to check whether we match here. We need to see if we match
         # the end of the hostname, both with and without the port.
@@ -725,7 +729,7 @@ def should_bypass_proxies(url, no_proxy):
         else:
             host_with_port = parsed.hostname
             if parsed.port:
-                host_with_port += ':{0}'.format(parsed.port)
+                host_with_port += ':{}'.format(parsed.port)
 
             for host in no_proxy:
                 if parsed.hostname.endswith(host) or host_with_port.endswith(host):
@@ -733,13 +737,8 @@ def should_bypass_proxies(url, no_proxy):
                     # to apply the proxies on this URL.
                     return True
 
-    # If the system proxy settings indicate that this URL should be bypassed,
-    # don't proxy.
-    # The proxy_bypass function is incredibly buggy on OS X in early versions
-    # of Python 2.6, so allow this call to fail. Only catch the specific
-    # exceptions we've seen, though: this call failing in other ways can reveal
-    # legitimate problems.
     with set_environ('no_proxy', no_proxy_arg):
+        # parsed.hostname can be `None` in cases such as a file URI.
         try:
             bypass = proxy_bypass(parsed.hostname)
         except (TypeError, socket.gaierror):