jpayne@7: """
jpayne@7: requests.adapters
jpayne@7: ~~~~~~~~~~~~~~~~~
jpayne@7: 
jpayne@7: This module contains the transport adapters that Requests uses to define
jpayne@7: and maintain connections.
jpayne@7: """
jpayne@7: 
jpayne@7: import os.path
jpayne@7: import socket  # noqa: F401
jpayne@7: 
jpayne@7: from urllib3.exceptions import ClosedPoolError, ConnectTimeoutError
jpayne@7: from urllib3.exceptions import HTTPError as _HTTPError
jpayne@7: from urllib3.exceptions import InvalidHeader as _InvalidHeader
jpayne@7: from urllib3.exceptions import (
jpayne@7:     LocationValueError,
jpayne@7:     MaxRetryError,
jpayne@7:     NewConnectionError,
jpayne@7:     ProtocolError,
jpayne@7: )
jpayne@7: from urllib3.exceptions import ProxyError as _ProxyError
jpayne@7: from urllib3.exceptions import ReadTimeoutError, ResponseError
jpayne@7: from urllib3.exceptions import SSLError as _SSLError
jpayne@7: from urllib3.poolmanager import PoolManager, proxy_from_url
jpayne@7: from urllib3.util import Timeout as TimeoutSauce
jpayne@7: from urllib3.util import parse_url
jpayne@7: from urllib3.util.retry import Retry
jpayne@7: 
jpayne@7: from .auth import _basic_auth_str
jpayne@7: from .compat import basestring, urlparse
jpayne@7: from .cookies import extract_cookies_to_jar
jpayne@7: from .exceptions import (
jpayne@7:     ConnectionError,
jpayne@7:     ConnectTimeout,
jpayne@7:     InvalidHeader,
jpayne@7:     InvalidProxyURL,
jpayne@7:     InvalidSchema,
jpayne@7:     InvalidURL,
jpayne@7:     ProxyError,
jpayne@7:     ReadTimeout,
jpayne@7:     RetryError,
jpayne@7:     SSLError,
jpayne@7: )
jpayne@7: from .models import Response
jpayne@7: from .structures import CaseInsensitiveDict
jpayne@7: from .utils import (
jpayne@7:     DEFAULT_CA_BUNDLE_PATH,
jpayne@7:     extract_zipped_paths,
jpayne@7:     get_auth_from_url,
jpayne@7:     get_encoding_from_headers,
jpayne@7:     prepend_scheme_if_needed,
jpayne@7:     select_proxy,
jpayne@7:     urldefragauth,
jpayne@7: )
jpayne@7: 
jpayne@7: try:
jpayne@7:     from urllib3.contrib.socks import SOCKSProxyManager
jpayne@7: except ImportError:
jpayne@7: 
jpayne@7:     def SOCKSProxyManager(*args, **kwargs):
jpayne@7:         raise InvalidSchema("Missing dependencies for SOCKS support.")
jpayne@7: 
jpayne@7: 
jpayne@7: DEFAULT_POOLBLOCK = False
jpayne@7: DEFAULT_POOLSIZE = 10
jpayne@7: DEFAULT_RETRIES = 0
jpayne@7: DEFAULT_POOL_TIMEOUT = None
jpayne@7: 
jpayne@7: 
jpayne@7: class BaseAdapter:
jpayne@7:     """The Base Transport Adapter"""
jpayne@7: 
jpayne@7:     def __init__(self):
jpayne@7:         super().__init__()
jpayne@7: 
jpayne@7:     def send(
jpayne@7:         self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None
jpayne@7:     ):
jpayne@7:         """Sends PreparedRequest object. Returns Response object.
jpayne@7: 
jpayne@7:         :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
jpayne@7:         :param stream: (optional) Whether to stream the request content.
jpayne@7:         :param timeout: (optional) How long to wait for the server to send
jpayne@7:             data before giving up, as a float, or a :ref:`(connect timeout,
jpayne@7:             read timeout) <timeouts>` tuple.
jpayne@7:         :type timeout: float or tuple
jpayne@7:         :param verify: (optional) Either a boolean, in which case it controls whether we verify
jpayne@7:             the server's TLS certificate, or a string, in which case it must be a path
jpayne@7:             to a CA bundle to use
jpayne@7:         :param cert: (optional) Any user-provided SSL certificate to be trusted.
jpayne@7:         :param proxies: (optional) The proxies dictionary to apply to the request.
jpayne@7:         """
jpayne@7:         raise NotImplementedError
jpayne@7: 
jpayne@7:     def close(self):
jpayne@7:         """Cleans up adapter specific items."""
jpayne@7:         raise NotImplementedError
jpayne@7: 
jpayne@7: 
jpayne@7: class HTTPAdapter(BaseAdapter):
jpayne@7:     """The built-in HTTP Adapter for urllib3.
jpayne@7: 
jpayne@7:     Provides a general-case interface for Requests sessions to contact HTTP and
jpayne@7:     HTTPS urls by implementing the Transport Adapter interface. This class will
jpayne@7:     usually be created by the :class:`Session <Session>` class under the
jpayne@7:     covers.
jpayne@7: 
jpayne@7:     :param pool_connections: The number of urllib3 connection pools to cache.
jpayne@7:     :param pool_maxsize: The maximum number of connections to save in the pool.
jpayne@7:     :param max_retries: The maximum number of retries each connection
jpayne@7:         should attempt. Note, this applies only to failed DNS lookups, socket
jpayne@7:         connections and connection timeouts, never to requests where data has
jpayne@7:         made it to the server. By default, Requests does not retry failed
jpayne@7:         connections. If you need granular control over the conditions under
jpayne@7:         which we retry a request, import urllib3's ``Retry`` class and pass
jpayne@7:         that instead.
jpayne@7:     :param pool_block: Whether the connection pool should block for connections.
jpayne@7: 
jpayne@7:     Usage::
jpayne@7: 
jpayne@7:       >>> import requests
jpayne@7:       >>> s = requests.Session()
jpayne@7:       >>> a = requests.adapters.HTTPAdapter(max_retries=3)
jpayne@7:       >>> s.mount('http://', a)
jpayne@7:     """
jpayne@7: 
jpayne@7:     __attrs__ = [
jpayne@7:         "max_retries",
jpayne@7:         "config",
jpayne@7:         "_pool_connections",
jpayne@7:         "_pool_maxsize",
jpayne@7:         "_pool_block",
jpayne@7:     ]
jpayne@7: 
jpayne@7:     def __init__(
jpayne@7:         self,
jpayne@7:         pool_connections=DEFAULT_POOLSIZE,
jpayne@7:         pool_maxsize=DEFAULT_POOLSIZE,
jpayne@7:         max_retries=DEFAULT_RETRIES,
jpayne@7:         pool_block=DEFAULT_POOLBLOCK,
jpayne@7:     ):
jpayne@7:         if max_retries == DEFAULT_RETRIES:
jpayne@7:             self.max_retries = Retry(0, read=False)
jpayne@7:         else:
jpayne@7:             self.max_retries = Retry.from_int(max_retries)
jpayne@7:         self.config = {}
jpayne@7:         self.proxy_manager = {}
jpayne@7: 
jpayne@7:         super().__init__()
jpayne@7: 
jpayne@7:         self._pool_connections = pool_connections
jpayne@7:         self._pool_maxsize = pool_maxsize
jpayne@7:         self._pool_block = pool_block
jpayne@7: 
jpayne@7:         self.init_poolmanager(pool_connections, pool_maxsize, block=pool_block)
jpayne@7: 
jpayne@7:     def __getstate__(self):
jpayne@7:         return {attr: getattr(self, attr, None) for attr in self.__attrs__}
jpayne@7: 
jpayne@7:     def __setstate__(self, state):
jpayne@7:         # Can't handle by adding 'proxy_manager' to self.__attrs__ because
jpayne@7:         # self.poolmanager uses a lambda function, which isn't pickleable.
jpayne@7:         self.proxy_manager = {}
jpayne@7:         self.config = {}
jpayne@7: 
jpayne@7:         for attr, value in state.items():
jpayne@7:             setattr(self, attr, value)
jpayne@7: 
jpayne@7:         self.init_poolmanager(
jpayne@7:             self._pool_connections, self._pool_maxsize, block=self._pool_block
jpayne@7:         )
jpayne@7: 
jpayne@7:     def init_poolmanager(
jpayne@7:         self, connections, maxsize, block=DEFAULT_POOLBLOCK, **pool_kwargs
jpayne@7:     ):
jpayne@7:         """Initializes a urllib3 PoolManager.
jpayne@7: 
jpayne@7:         This method should not be called from user code, and is only
jpayne@7:         exposed for use when subclassing the
jpayne@7:         :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
jpayne@7: 
jpayne@7:         :param connections: The number of urllib3 connection pools to cache.
jpayne@7:         :param maxsize: The maximum number of connections to save in the pool.
jpayne@7:         :param block: Block when no free connections are available.
jpayne@7:         :param pool_kwargs: Extra keyword arguments used to initialize the Pool Manager.
jpayne@7:         """
jpayne@7:         # save these values for pickling
jpayne@7:         self._pool_connections = connections
jpayne@7:         self._pool_maxsize = maxsize
jpayne@7:         self._pool_block = block
jpayne@7: 
jpayne@7:         self.poolmanager = PoolManager(
jpayne@7:             num_pools=connections,
jpayne@7:             maxsize=maxsize,
jpayne@7:             block=block,
jpayne@7:             **pool_kwargs,
jpayne@7:         )
jpayne@7: 
jpayne@7:     def proxy_manager_for(self, proxy, **proxy_kwargs):
jpayne@7:         """Return urllib3 ProxyManager for the given proxy.
jpayne@7: 
jpayne@7:         This method should not be called from user code, and is only
jpayne@7:         exposed for use when subclassing the
jpayne@7:         :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
jpayne@7: 
jpayne@7:         :param proxy: The proxy to return a urllib3 ProxyManager for.
jpayne@7:         :param proxy_kwargs: Extra keyword arguments used to configure the Proxy Manager.
jpayne@7:         :returns: ProxyManager
jpayne@7:         :rtype: urllib3.ProxyManager
jpayne@7:         """
jpayne@7:         if proxy in self.proxy_manager:
jpayne@7:             manager = self.proxy_manager[proxy]
jpayne@7:         elif proxy.lower().startswith("socks"):
jpayne@7:             username, password = get_auth_from_url(proxy)
jpayne@7:             manager = self.proxy_manager[proxy] = SOCKSProxyManager(
jpayne@7:                 proxy,
jpayne@7:                 username=username,
jpayne@7:                 password=password,
jpayne@7:                 num_pools=self._pool_connections,
jpayne@7:                 maxsize=self._pool_maxsize,
jpayne@7:                 block=self._pool_block,
jpayne@7:                 **proxy_kwargs,
jpayne@7:             )
jpayne@7:         else:
jpayne@7:             proxy_headers = self.proxy_headers(proxy)
jpayne@7:             manager = self.proxy_manager[proxy] = proxy_from_url(
jpayne@7:                 proxy,
jpayne@7:                 proxy_headers=proxy_headers,
jpayne@7:                 num_pools=self._pool_connections,
jpayne@7:                 maxsize=self._pool_maxsize,
jpayne@7:                 block=self._pool_block,
jpayne@7:                 **proxy_kwargs,
jpayne@7:             )
jpayne@7: 
jpayne@7:         return manager
jpayne@7: 
jpayne@7:     def cert_verify(self, conn, url, verify, cert):
jpayne@7:         """Verify a SSL certificate. This method should not be called from user
jpayne@7:         code, and is only exposed for use when subclassing the
jpayne@7:         :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
jpayne@7: 
jpayne@7:         :param conn: The urllib3 connection object associated with the cert.
jpayne@7:         :param url: The requested URL.
jpayne@7:         :param verify: Either a boolean, in which case it controls whether we verify
jpayne@7:             the server's TLS certificate, or a string, in which case it must be a path
jpayne@7:             to a CA bundle to use
jpayne@7:         :param cert: The SSL certificate to verify.
jpayne@7:         """
jpayne@7:         if url.lower().startswith("https") and verify:
jpayne@7: 
jpayne@7:             cert_loc = None
jpayne@7: 
jpayne@7:             # Allow self-specified cert location.
jpayne@7:             if verify is not True:
jpayne@7:                 cert_loc = verify
jpayne@7: 
jpayne@7:             if not cert_loc:
jpayne@7:                 cert_loc = extract_zipped_paths(DEFAULT_CA_BUNDLE_PATH)
jpayne@7: 
jpayne@7:             if not cert_loc or not os.path.exists(cert_loc):
jpayne@7:                 raise OSError(
jpayne@7:                     f"Could not find a suitable TLS CA certificate bundle, "
jpayne@7:                     f"invalid path: {cert_loc}"
jpayne@7:                 )
jpayne@7: 
jpayne@7:             conn.cert_reqs = "CERT_REQUIRED"
jpayne@7: 
jpayne@7:             if not os.path.isdir(cert_loc):
jpayne@7:                 conn.ca_certs = cert_loc
jpayne@7:             else:
jpayne@7:                 conn.ca_cert_dir = cert_loc
jpayne@7:         else:
jpayne@7:             conn.cert_reqs = "CERT_NONE"
jpayne@7:             conn.ca_certs = None
jpayne@7:             conn.ca_cert_dir = None
jpayne@7: 
jpayne@7:         if cert:
jpayne@7:             if not isinstance(cert, basestring):
jpayne@7:                 conn.cert_file = cert[0]
jpayne@7:                 conn.key_file = cert[1]
jpayne@7:             else:
jpayne@7:                 conn.cert_file = cert
jpayne@7:                 conn.key_file = None
jpayne@7:             if conn.cert_file and not os.path.exists(conn.cert_file):
jpayne@7:                 raise OSError(
jpayne@7:                     f"Could not find the TLS certificate file, "
jpayne@7:                     f"invalid path: {conn.cert_file}"
jpayne@7:                 )
jpayne@7:             if conn.key_file and not os.path.exists(conn.key_file):
jpayne@7:                 raise OSError(
jpayne@7:                     f"Could not find the TLS key file, invalid path: {conn.key_file}"
jpayne@7:                 )
jpayne@7: 
jpayne@7:     def build_response(self, req, resp):
jpayne@7:         """Builds a :class:`Response <requests.Response>` object from a urllib3
jpayne@7:         response. This should not be called from user code, and is only exposed
jpayne@7:         for use when subclassing the
jpayne@7:         :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`
jpayne@7: 
jpayne@7:         :param req: The :class:`PreparedRequest <PreparedRequest>` used to generate the response.
jpayne@7:         :param resp: The urllib3 response object.
jpayne@7:         :rtype: requests.Response
jpayne@7:         """
jpayne@7:         response = Response()
jpayne@7: 
jpayne@7:         # Fallback to None if there's no status_code, for whatever reason.
jpayne@7:         response.status_code = getattr(resp, "status", None)
jpayne@7: 
jpayne@7:         # Make headers case-insensitive.
jpayne@7:         response.headers = CaseInsensitiveDict(getattr(resp, "headers", {}))
jpayne@7: 
jpayne@7:         # Set encoding.
jpayne@7:         response.encoding = get_encoding_from_headers(response.headers)
jpayne@7:         response.raw = resp
jpayne@7:         response.reason = response.raw.reason
jpayne@7: 
jpayne@7:         if isinstance(req.url, bytes):
jpayne@7:             response.url = req.url.decode("utf-8")
jpayne@7:         else:
jpayne@7:             response.url = req.url
jpayne@7: 
jpayne@7:         # Add new cookies from the server.
jpayne@7:         extract_cookies_to_jar(response.cookies, req, resp)
jpayne@7: 
jpayne@7:         # Give the Response some context.
jpayne@7:         response.request = req
jpayne@7:         response.connection = self
jpayne@7: 
jpayne@7:         return response
jpayne@7: 
jpayne@7:     def get_connection(self, url, proxies=None):
jpayne@7:         """Returns a urllib3 connection for the given URL. This should not be
jpayne@7:         called from user code, and is only exposed for use when subclassing the
jpayne@7:         :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
jpayne@7: 
jpayne@7:         :param url: The URL to connect to.
jpayne@7:         :param proxies: (optional) A Requests-style dictionary of proxies used on this request.
jpayne@7:         :rtype: urllib3.ConnectionPool
jpayne@7:         """
jpayne@7:         proxy = select_proxy(url, proxies)
jpayne@7: 
jpayne@7:         if proxy:
jpayne@7:             proxy = prepend_scheme_if_needed(proxy, "http")
jpayne@7:             proxy_url = parse_url(proxy)
jpayne@7:             if not proxy_url.host:
jpayne@7:                 raise InvalidProxyURL(
jpayne@7:                     "Please check proxy URL. It is malformed "
jpayne@7:                     "and could be missing the host."
jpayne@7:                 )
jpayne@7:             proxy_manager = self.proxy_manager_for(proxy)
jpayne@7:             conn = proxy_manager.connection_from_url(url)
jpayne@7:         else:
jpayne@7:             # Only scheme should be lower case
jpayne@7:             parsed = urlparse(url)
jpayne@7:             url = parsed.geturl()
jpayne@7:             conn = self.poolmanager.connection_from_url(url)
jpayne@7: 
jpayne@7:         return conn
jpayne@7: 
jpayne@7:     def close(self):
jpayne@7:         """Disposes of any internal state.
jpayne@7: 
jpayne@7:         Currently, this closes the PoolManager and any active ProxyManager,
jpayne@7:         which closes any pooled connections.
jpayne@7:         """
jpayne@7:         self.poolmanager.clear()
jpayne@7:         for proxy in self.proxy_manager.values():
jpayne@7:             proxy.clear()
jpayne@7: 
jpayne@7:     def request_url(self, request, proxies):
jpayne@7:         """Obtain the url to use when making the final request.
jpayne@7: 
jpayne@7:         If the message is being sent through a HTTP proxy, the full URL has to
jpayne@7:         be used. Otherwise, we should only use the path portion of the URL.
jpayne@7: 
jpayne@7:         This should not be called from user code, and is only exposed for use
jpayne@7:         when subclassing the
jpayne@7:         :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
jpayne@7: 
jpayne@7:         :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
jpayne@7:         :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs.
jpayne@7:         :rtype: str
jpayne@7:         """
jpayne@7:         proxy = select_proxy(request.url, proxies)
jpayne@7:         scheme = urlparse(request.url).scheme
jpayne@7: 
jpayne@7:         is_proxied_http_request = proxy and scheme != "https"
jpayne@7:         using_socks_proxy = False
jpayne@7:         if proxy:
jpayne@7:             proxy_scheme = urlparse(proxy).scheme.lower()
jpayne@7:             using_socks_proxy = proxy_scheme.startswith("socks")
jpayne@7: 
jpayne@7:         url = request.path_url
jpayne@7:         if is_proxied_http_request and not using_socks_proxy:
jpayne@7:             url = urldefragauth(request.url)
jpayne@7: 
jpayne@7:         return url
jpayne@7: 
jpayne@7:     def add_headers(self, request, **kwargs):
jpayne@7:         """Add any headers needed by the connection. As of v2.0 this does
jpayne@7:         nothing by default, but is left for overriding by users that subclass
jpayne@7:         the :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
jpayne@7: 
jpayne@7:         This should not be called from user code, and is only exposed for use
jpayne@7:         when subclassing the
jpayne@7:         :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
jpayne@7: 
jpayne@7:         :param request: The :class:`PreparedRequest <PreparedRequest>` to add headers to.
jpayne@7:         :param kwargs: The keyword arguments from the call to send().
jpayne@7:         """
jpayne@7:         pass
jpayne@7: 
jpayne@7:     def proxy_headers(self, proxy):
jpayne@7:         """Returns a dictionary of the headers to add to any request sent
jpayne@7:         through a proxy. This works with urllib3 magic to ensure that they are
jpayne@7:         correctly sent to the proxy, rather than in a tunnelled request if
jpayne@7:         CONNECT is being used.
jpayne@7: 
jpayne@7:         This should not be called from user code, and is only exposed for use
jpayne@7:         when subclassing the
jpayne@7:         :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
jpayne@7: 
jpayne@7:         :param proxy: The url of the proxy being used for this request.
jpayne@7:         :rtype: dict
jpayne@7:         """
jpayne@7:         headers = {}
jpayne@7:         username, password = get_auth_from_url(proxy)
jpayne@7: 
jpayne@7:         if username:
jpayne@7:             headers["Proxy-Authorization"] = _basic_auth_str(username, password)
jpayne@7: 
jpayne@7:         return headers
jpayne@7: 
jpayne@7:     def send(
jpayne@7:         self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None
jpayne@7:     ):
jpayne@7:         """Sends PreparedRequest object. Returns Response object.
jpayne@7: 
jpayne@7:         :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
jpayne@7:         :param stream: (optional) Whether to stream the request content.
jpayne@7:         :param timeout: (optional) How long to wait for the server to send
jpayne@7:             data before giving up, as a float, or a :ref:`(connect timeout,
jpayne@7:             read timeout) <timeouts>` tuple.
jpayne@7:         :type timeout: float or tuple or urllib3 Timeout object
jpayne@7:         :param verify: (optional) Either a boolean, in which case it controls whether
jpayne@7:             we verify the server's TLS certificate, or a string, in which case it
jpayne@7:             must be a path to a CA bundle to use
jpayne@7:         :param cert: (optional) Any user-provided SSL certificate to be trusted.
jpayne@7:         :param proxies: (optional) The proxies dictionary to apply to the request.
jpayne@7:         :rtype: requests.Response
jpayne@7:         """
jpayne@7: 
jpayne@7:         try:
jpayne@7:             conn = self.get_connection(request.url, proxies)
jpayne@7:         except LocationValueError as e:
jpayne@7:             raise InvalidURL(e, request=request)
jpayne@7: 
jpayne@7:         self.cert_verify(conn, request.url, verify, cert)
jpayne@7:         url = self.request_url(request, proxies)
jpayne@7:         self.add_headers(
jpayne@7:             request,
jpayne@7:             stream=stream,
jpayne@7:             timeout=timeout,
jpayne@7:             verify=verify,
jpayne@7:             cert=cert,
jpayne@7:             proxies=proxies,
jpayne@7:         )
jpayne@7: 
jpayne@7:         chunked = not (request.body is None or "Content-Length" in request.headers)
jpayne@7: 
jpayne@7:         if isinstance(timeout, tuple):
jpayne@7:             try:
jpayne@7:                 connect, read = timeout
jpayne@7:                 timeout = TimeoutSauce(connect=connect, read=read)
jpayne@7:             except ValueError:
jpayne@7:                 raise ValueError(
jpayne@7:                     f"Invalid timeout {timeout}. Pass a (connect, read) timeout tuple, "
jpayne@7:                     f"or a single float to set both timeouts to the same value."
jpayne@7:                 )
jpayne@7:         elif isinstance(timeout, TimeoutSauce):
jpayne@7:             pass
jpayne@7:         else:
jpayne@7:             timeout = TimeoutSauce(connect=timeout, read=timeout)
jpayne@7: 
jpayne@7:         try:
jpayne@7:             resp = conn.urlopen(
jpayne@7:                 method=request.method,
jpayne@7:                 url=url,
jpayne@7:                 body=request.body,
jpayne@7:                 headers=request.headers,
jpayne@7:                 redirect=False,
jpayne@7:                 assert_same_host=False,
jpayne@7:                 preload_content=False,
jpayne@7:                 decode_content=False,
jpayne@7:                 retries=self.max_retries,
jpayne@7:                 timeout=timeout,
jpayne@7:                 chunked=chunked,
jpayne@7:             )
jpayne@7: 
jpayne@7:         except (ProtocolError, OSError) as err:
jpayne@7:             raise ConnectionError(err, request=request)
jpayne@7: 
jpayne@7:         except MaxRetryError as e:
jpayne@7:             if isinstance(e.reason, ConnectTimeoutError):
jpayne@7:                 # TODO: Remove this in 3.0.0: see #2811
jpayne@7:                 if not isinstance(e.reason, NewConnectionError):
jpayne@7:                     raise ConnectTimeout(e, request=request)
jpayne@7: 
jpayne@7:             if isinstance(e.reason, ResponseError):
jpayne@7:                 raise RetryError(e, request=request)
jpayne@7: 
jpayne@7:             if isinstance(e.reason, _ProxyError):
jpayne@7:                 raise ProxyError(e, request=request)
jpayne@7: 
jpayne@7:             if isinstance(e.reason, _SSLError):
jpayne@7:                 # This branch is for urllib3 v1.22 and later.
jpayne@7:                 raise SSLError(e, request=request)
jpayne@7: 
jpayne@7:             raise ConnectionError(e, request=request)
jpayne@7: 
jpayne@7:         except ClosedPoolError as e:
jpayne@7:             raise ConnectionError(e, request=request)
jpayne@7: 
jpayne@7:         except _ProxyError as e:
jpayne@7:             raise ProxyError(e)
jpayne@7: 
jpayne@7:         except (_SSLError, _HTTPError) as e:
jpayne@7:             if isinstance(e, _SSLError):
jpayne@7:                 # This branch is for urllib3 versions earlier than v1.22
jpayne@7:                 raise SSLError(e, request=request)
jpayne@7:             elif isinstance(e, ReadTimeoutError):
jpayne@7:                 raise ReadTimeout(e, request=request)
jpayne@7:             elif isinstance(e, _InvalidHeader):
jpayne@7:                 raise InvalidHeader(e, request=request)
jpayne@7:             else:
jpayne@7:                 raise
jpayne@7: 
jpayne@7:         return self.build_response(request, resp)