--- a/lib/python3.8/site-packages/pip/_vendor/requests/adapters.py	Mon Jul 27 03:47:31 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,533 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.adapters
-~~~~~~~~~~~~~~~~~
-
-This module contains the transport adapters that Requests uses to define
-and maintain connections.
-"""
-
-import os.path
-import socket
-
-from pip._vendor.urllib3.poolmanager import PoolManager, proxy_from_url
-from pip._vendor.urllib3.response import HTTPResponse
-from pip._vendor.urllib3.util import parse_url
-from pip._vendor.urllib3.util import Timeout as TimeoutSauce
-from pip._vendor.urllib3.util.retry import Retry
-from pip._vendor.urllib3.exceptions import ClosedPoolError
-from pip._vendor.urllib3.exceptions import ConnectTimeoutError
-from pip._vendor.urllib3.exceptions import HTTPError as _HTTPError
-from pip._vendor.urllib3.exceptions import MaxRetryError
-from pip._vendor.urllib3.exceptions import NewConnectionError
-from pip._vendor.urllib3.exceptions import ProxyError as _ProxyError
-from pip._vendor.urllib3.exceptions import ProtocolError
-from pip._vendor.urllib3.exceptions import ReadTimeoutError
-from pip._vendor.urllib3.exceptions import SSLError as _SSLError
-from pip._vendor.urllib3.exceptions import ResponseError
-from pip._vendor.urllib3.exceptions import LocationValueError
-
-from .models import Response
-from .compat import urlparse, basestring
-from .utils import (DEFAULT_CA_BUNDLE_PATH, extract_zipped_paths,
-                    get_encoding_from_headers, prepend_scheme_if_needed,
-                    get_auth_from_url, urldefragauth, select_proxy)
-from .structures import CaseInsensitiveDict
-from .cookies import extract_cookies_to_jar
-from .exceptions import (ConnectionError, ConnectTimeout, ReadTimeout, SSLError,
-                         ProxyError, RetryError, InvalidSchema, InvalidProxyURL,
-                         InvalidURL)
-from .auth import _basic_auth_str
-
-try:
-    from pip._vendor.urllib3.contrib.socks import SOCKSProxyManager
-except ImportError:
-    def SOCKSProxyManager(*args, **kwargs):
-        raise InvalidSchema("Missing dependencies for SOCKS support.")
-
-DEFAULT_POOLBLOCK = False
-DEFAULT_POOLSIZE = 10
-DEFAULT_RETRIES = 0
-DEFAULT_POOL_TIMEOUT = None
-
-
-class BaseAdapter(object):
-    """The Base Transport Adapter"""
-
-    def __init__(self):
-        super(BaseAdapter, self).__init__()
-
-    def send(self, request, stream=False, timeout=None, verify=True,
-             cert=None, proxies=None):
-        """Sends PreparedRequest object. Returns Response object.
-
-        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
-        :param stream: (optional) Whether to stream the request content.
-        :param timeout: (optional) How long to wait for the server to send
-            data before giving up, as a float, or a :ref:`(connect timeout,
-            read timeout) <timeouts>` tuple.
-        :type timeout: float or tuple
-        :param verify: (optional) Either a boolean, in which case it controls whether we verify
-            the server's TLS certificate, or a string, in which case it must be a path
-            to a CA bundle to use
-        :param cert: (optional) Any user-provided SSL certificate to be trusted.
-        :param proxies: (optional) The proxies dictionary to apply to the request.
-        """
-        raise NotImplementedError
-
-    def close(self):
-        """Cleans up adapter specific items."""
-        raise NotImplementedError
-
-
-class HTTPAdapter(BaseAdapter):
-    """The built-in HTTP Adapter for urllib3.
-
-    Provides a general-case interface for Requests sessions to contact HTTP and
-    HTTPS urls by implementing the Transport Adapter interface. This class will
-    usually be created by the :class:`Session <Session>` class under the
-    covers.
-
-    :param pool_connections: The number of urllib3 connection pools to cache.
-    :param pool_maxsize: The maximum number of connections to save in the pool.
-    :param max_retries: The maximum number of retries each connection
-        should attempt. Note, this applies only to failed DNS lookups, socket
-        connections and connection timeouts, never to requests where data has
-        made it to the server. By default, Requests does not retry failed
-        connections. If you need granular control over the conditions under
-        which we retry a request, import urllib3's ``Retry`` class and pass
-        that instead.
-    :param pool_block: Whether the connection pool should block for connections.
-
-    Usage::
-
-      >>> import requests
-      >>> s = requests.Session()
-      >>> a = requests.adapters.HTTPAdapter(max_retries=3)
-      >>> s.mount('http://', a)
-    """
-    __attrs__ = ['max_retries', 'config', '_pool_connections', '_pool_maxsize',
-                 '_pool_block']
-
-    def __init__(self, pool_connections=DEFAULT_POOLSIZE,
-                 pool_maxsize=DEFAULT_POOLSIZE, max_retries=DEFAULT_RETRIES,
-                 pool_block=DEFAULT_POOLBLOCK):
-        if max_retries == DEFAULT_RETRIES:
-            self.max_retries = Retry(0, read=False)
-        else:
-            self.max_retries = Retry.from_int(max_retries)
-        self.config = {}
-        self.proxy_manager = {}
-
-        super(HTTPAdapter, self).__init__()
-
-        self._pool_connections = pool_connections
-        self._pool_maxsize = pool_maxsize
-        self._pool_block = pool_block
-
-        self.init_poolmanager(pool_connections, pool_maxsize, block=pool_block)
-
-    def __getstate__(self):
-        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
-        # self.poolmanager uses a lambda function, which isn't pickleable.
-        self.proxy_manager = {}
-        self.config = {}
-
-        for attr, value in state.items():
-            setattr(self, attr, value)
-
-        self.init_poolmanager(self._pool_connections, self._pool_maxsize,
-                              block=self._pool_block)
-
-    def init_poolmanager(self, connections, maxsize, block=DEFAULT_POOLBLOCK, **pool_kwargs):
-        """Initializes a urllib3 PoolManager.
-
-        This method should not be called from user code, and is only
-        exposed for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param connections: The number of urllib3 connection pools to cache.
-        :param maxsize: The maximum number of connections to save in the pool.
-        :param block: Block when no free connections are available.
-        :param pool_kwargs: Extra keyword arguments used to initialize the Pool Manager.
-        """
-        # save these values for pickling
-        self._pool_connections = connections
-        self._pool_maxsize = maxsize
-        self._pool_block = block
-
-        self.poolmanager = PoolManager(num_pools=connections, maxsize=maxsize,
-                                       block=block, strict=True, **pool_kwargs)
-
-    def proxy_manager_for(self, proxy, **proxy_kwargs):
-        """Return urllib3 ProxyManager for the given proxy.
-
-        This method should not be called from user code, and is only
-        exposed for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param proxy: The proxy to return a urllib3 ProxyManager for.
-        :param proxy_kwargs: Extra keyword arguments used to configure the Proxy Manager.
-        :returns: ProxyManager
-        :rtype: urllib3.ProxyManager
-        """
-        if proxy in self.proxy_manager:
-            manager = self.proxy_manager[proxy]
-        elif proxy.lower().startswith('socks'):
-            username, password = get_auth_from_url(proxy)
-            manager = self.proxy_manager[proxy] = SOCKSProxyManager(
-                proxy,
-                username=username,
-                password=password,
-                num_pools=self._pool_connections,
-                maxsize=self._pool_maxsize,
-                block=self._pool_block,
-                **proxy_kwargs
-            )
-        else:
-            proxy_headers = self.proxy_headers(proxy)
-            manager = self.proxy_manager[proxy] = proxy_from_url(
-                proxy,
-                proxy_headers=proxy_headers,
-                num_pools=self._pool_connections,
-                maxsize=self._pool_maxsize,
-                block=self._pool_block,
-                **proxy_kwargs)
-
-        return manager
-
-    def cert_verify(self, conn, url, verify, cert):
-        """Verify a SSL certificate. This method should not be called from user
-        code, and is only exposed for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param conn: The urllib3 connection object associated with the cert.
-        :param url: The requested URL.
-        :param verify: Either a boolean, in which case it controls whether we verify
-            the server's TLS certificate, or a string, in which case it must be a path
-            to a CA bundle to use
-        :param cert: The SSL certificate to verify.
-        """
-        if url.lower().startswith('https') and verify:
-
-            cert_loc = None
-
-            # Allow self-specified cert location.
-            if verify is not True:
-                cert_loc = verify
-
-            if not cert_loc:
-                cert_loc = extract_zipped_paths(DEFAULT_CA_BUNDLE_PATH)
-
-            if not cert_loc or not os.path.exists(cert_loc):
-                raise IOError("Could not find a suitable TLS CA certificate bundle, "
-                              "invalid path: {}".format(cert_loc))
-
-            conn.cert_reqs = 'CERT_REQUIRED'
-
-            if not os.path.isdir(cert_loc):
-                conn.ca_certs = cert_loc
-            else:
-                conn.ca_cert_dir = cert_loc
-        else:
-            conn.cert_reqs = 'CERT_NONE'
-            conn.ca_certs = None
-            conn.ca_cert_dir = None
-
-        if cert:
-            if not isinstance(cert, basestring):
-                conn.cert_file = cert[0]
-                conn.key_file = cert[1]
-            else:
-                conn.cert_file = cert
-                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: {}".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: {}".format(conn.key_file))
-
-    def build_response(self, req, resp):
-        """Builds a :class:`Response <requests.Response>` object from a urllib3
-        response. This should not be called from user code, and is only exposed
-        for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`
-
-        :param req: The :class:`PreparedRequest <PreparedRequest>` used to generate the response.
-        :param resp: The urllib3 response object.
-        :rtype: requests.Response
-        """
-        response = Response()
-
-        # Fallback to None if there's no status_code, for whatever reason.
-        response.status_code = getattr(resp, 'status', None)
-
-        # Make headers case-insensitive.
-        response.headers = CaseInsensitiveDict(getattr(resp, 'headers', {}))
-
-        # Set encoding.
-        response.encoding = get_encoding_from_headers(response.headers)
-        response.raw = resp
-        response.reason = response.raw.reason
-
-        if isinstance(req.url, bytes):
-            response.url = req.url.decode('utf-8')
-        else:
-            response.url = req.url
-
-        # Add new cookies from the server.
-        extract_cookies_to_jar(response.cookies, req, resp)
-
-        # Give the Response some context.
-        response.request = req
-        response.connection = self
-
-        return response
-
-    def get_connection(self, url, proxies=None):
-        """Returns a urllib3 connection for the given URL. This should not be
-        called from user code, and is only exposed for use when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param url: The URL to connect to.
-        :param proxies: (optional) A Requests-style dictionary of proxies used on this request.
-        :rtype: urllib3.ConnectionPool
-        """
-        proxy = select_proxy(url, proxies)
-
-        if proxy:
-            proxy = prepend_scheme_if_needed(proxy, 'http')
-            proxy_url = parse_url(proxy)
-            if not proxy_url.host:
-                raise InvalidProxyURL("Please check proxy URL. It is malformed"
-                                      " and could be missing the host.")
-            proxy_manager = self.proxy_manager_for(proxy)
-            conn = proxy_manager.connection_from_url(url)
-        else:
-            # Only scheme should be lower case
-            parsed = urlparse(url)
-            url = parsed.geturl()
-            conn = self.poolmanager.connection_from_url(url)
-
-        return conn
-
-    def close(self):
-        """Disposes of any internal state.
-
-        Currently, this closes the PoolManager and any active ProxyManager,
-        which closes any pooled connections.
-        """
-        self.poolmanager.clear()
-        for proxy in self.proxy_manager.values():
-            proxy.clear()
-
-    def request_url(self, request, proxies):
-        """Obtain the url to use when making the final request.
-
-        If the message is being sent through a HTTP proxy, the full URL has to
-        be used. Otherwise, we should only use the path portion of the URL.
-
-        This should not be called from user code, and is only exposed for use
-        when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
-        :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs.
-        :rtype: str
-        """
-        proxy = select_proxy(request.url, proxies)
-        scheme = urlparse(request.url).scheme
-
-        is_proxied_http_request = (proxy and scheme != 'https')
-        using_socks_proxy = False
-        if proxy:
-            proxy_scheme = urlparse(proxy).scheme.lower()
-            using_socks_proxy = proxy_scheme.startswith('socks')
-
-        url = request.path_url
-        if is_proxied_http_request and not using_socks_proxy:
-            url = urldefragauth(request.url)
-
-        return url
-
-    def add_headers(self, request, **kwargs):
-        """Add any headers needed by the connection. As of v2.0 this does
-        nothing by default, but is left for overriding by users that subclass
-        the :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        This should not be called from user code, and is only exposed for use
-        when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param request: The :class:`PreparedRequest <PreparedRequest>` to add headers to.
-        :param kwargs: The keyword arguments from the call to send().
-        """
-        pass
-
-    def proxy_headers(self, proxy):
-        """Returns a dictionary of the headers to add to any request sent
-        through a proxy. This works with urllib3 magic to ensure that they are
-        correctly sent to the proxy, rather than in a tunnelled request if
-        CONNECT is being used.
-
-        This should not be called from user code, and is only exposed for use
-        when subclassing the
-        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
-
-        :param proxy: The url of the proxy being used for this request.
-        :rtype: dict
-        """
-        headers = {}
-        username, password = get_auth_from_url(proxy)
-
-        if username:
-            headers['Proxy-Authorization'] = _basic_auth_str(username,
-                                                             password)
-
-        return headers
-
-    def send(self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None):
-        """Sends PreparedRequest object. Returns Response object.
-
-        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
-        :param stream: (optional) Whether to stream the request content.
-        :param timeout: (optional) How long to wait for the server to send
-            data before giving up, as a float, or a :ref:`(connect timeout,
-            read timeout) <timeouts>` tuple.
-        :type timeout: float or tuple or urllib3 Timeout object
-        :param verify: (optional) Either a boolean, in which case it controls whether
-            we verify the server's TLS certificate, or a string, in which case it
-            must be a path to a CA bundle to use
-        :param cert: (optional) Any user-provided SSL certificate to be trusted.
-        :param proxies: (optional) The proxies dictionary to apply to the request.
-        :rtype: requests.Response
-        """
-
-        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)
-        self.add_headers(request, stream=stream, timeout=timeout, verify=verify, cert=cert, proxies=proxies)
-
-        chunked = not (request.body is None or 'Content-Length' in request.headers)
-
-        if isinstance(timeout, tuple):
-            try:
-                connect, read = timeout
-                timeout = TimeoutSauce(connect=connect, read=read)
-            except ValueError as e:
-                # this may raise a string formatting error.
-                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)
-        elif isinstance(timeout, TimeoutSauce):
-            pass
-        else:
-            timeout = TimeoutSauce(connect=timeout, read=timeout)
-
-        try:
-            if not chunked:
-                resp = conn.urlopen(
-                    method=request.method,
-                    url=url,
-                    body=request.body,
-                    headers=request.headers,
-                    redirect=False,
-                    assert_same_host=False,
-                    preload_content=False,
-                    decode_content=False,
-                    retries=self.max_retries,
-                    timeout=timeout
-                )
-
-            # Send the request.
-            else:
-                if hasattr(conn, 'proxy_pool'):
-                    conn = conn.proxy_pool
-
-                low_conn = conn._get_conn(timeout=DEFAULT_POOL_TIMEOUT)
-
-                try:
-                    low_conn.putrequest(request.method,
-                                        url,
-                                        skip_accept_encoding=True)
-
-                    for header, value in request.headers.items():
-                        low_conn.putheader(header, value)
-
-                    low_conn.endheaders()
-
-                    for i in request.body:
-                        low_conn.send(hex(len(i))[2:].encode('utf-8'))
-                        low_conn.send(b'\r\n')
-                        low_conn.send(i)
-                        low_conn.send(b'\r\n')
-                    low_conn.send(b'0\r\n\r\n')
-
-                    # Receive the response from the server
-                    try:
-                        # For Python 2.7, use buffering of HTTP responses
-                        r = low_conn.getresponse(buffering=True)
-                    except TypeError:
-                        # For compatibility with Python 3.3+
-                        r = low_conn.getresponse()
-
-                    resp = HTTPResponse.from_httplib(
-                        r,
-                        pool=conn,
-                        connection=low_conn,
-                        preload_content=False,
-                        decode_content=False
-                    )
-                except:
-                    # If we hit any problems here, clean up the connection.
-                    # Then, reraise so that we can handle the actual exception.
-                    low_conn.close()
-                    raise
-
-        except (ProtocolError, socket.error) as err:
-            raise ConnectionError(err, request=request)
-
-        except MaxRetryError as e:
-            if isinstance(e.reason, ConnectTimeoutError):
-                # TODO: Remove this in 3.0.0: see #2811
-                if not isinstance(e.reason, NewConnectionError):
-                    raise ConnectTimeout(e, request=request)
-
-            if isinstance(e.reason, ResponseError):
-                raise RetryError(e, request=request)
-
-            if isinstance(e.reason, _ProxyError):
-                raise ProxyError(e, request=request)
-
-            if isinstance(e.reason, _SSLError):
-                # This branch is for urllib3 v1.22 and later.
-                raise SSLError(e, request=request)
-
-            raise ConnectionError(e, request=request)
-
-        except ClosedPoolError as e:
-            raise ConnectionError(e, request=request)
-
-        except _ProxyError as e:
-            raise ProxyError(e)
-
-        except (_SSLError, _HTTPError) as e:
-            if isinstance(e, _SSLError):
-                # This branch is for urllib3 versions earlier than v1.22
-                raise SSLError(e, request=request)
-            elif isinstance(e, ReadTimeoutError):
-                raise ReadTimeout(e, request=request)
-            else:
-                raise
-
-        return self.build_response(request, resp)