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+# Copyright 2016 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Transport adapter for http.client, for internal use only."""
+
+import http.client as http_client
+import logging
+import socket
+import urllib
+
+from google.auth import exceptions
+from google.auth import transport
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class Response(transport.Response):
+ """http.client transport response adapter.
+
+ Args:
+ response (http.client.HTTPResponse): The raw http client response.
+ """
+
+ def __init__(self, response):
+ self._status = response.status
+ self._headers = {key.lower(): value for key, value in response.getheaders()}
+ self._data = response.read()
+
+ @property
+ def status(self):
+ return self._status
+
+ @property
+ def headers(self):
+ return self._headers
+
+ @property
+ def data(self):
+ return self._data
+
+
+class Request(transport.Request):
+ """http.client transport request adapter."""
+
+ def __call__(
+ self, url, method="GET", body=None, headers=None, timeout=None, **kwargs
+ ):
+ """Make an HTTP request using http.client.
+
+ Args:
+ url (str): The URI to be requested.
+ method (str): The HTTP method to use for the request. Defaults
+ to 'GET'.
+ body (bytes): The payload / body in HTTP request.
+ headers (Mapping): Request headers.
+ timeout (Optional(int)): The number of seconds to wait for a
+ response from the server. If not specified or if None, the
+ socket global default timeout will be used.
+ kwargs: Additional arguments passed throught to the underlying
+ :meth:`~http.client.HTTPConnection.request` method.
+
+ Returns:
+ Response: The HTTP response.
+
+ Raises:
+ google.auth.exceptions.TransportError: If any exception occurred.
+ """
+ # socket._GLOBAL_DEFAULT_TIMEOUT is the default in http.client.
+ if timeout is None:
+ timeout = socket._GLOBAL_DEFAULT_TIMEOUT
+
+ # http.client doesn't allow None as the headers argument.
+ if headers is None:
+ headers = {}
+
+ # http.client needs the host and path parts specified separately.
+ parts = urllib.parse.urlsplit(url)
+ path = urllib.parse.urlunsplit(
+ ("", "", parts.path, parts.query, parts.fragment)
+ )
+
+ if parts.scheme != "http":
+ raise exceptions.TransportError(
+ "http.client transport only supports the http scheme, {}"
+ "was specified".format(parts.scheme)
+ )
+
+ connection = http_client.HTTPConnection(parts.netloc, timeout=timeout)
+
+ try:
+ _LOGGER.debug("Making request: %s %s", method, url)
+
+ connection.request(method, path, body=body, headers=headers, **kwargs)
+ response = connection.getresponse()
+ return Response(response)
+
+ except (http_client.HTTPException, socket.error) as caught_exc:
+ new_exc = exceptions.TransportError(caught_exc)
+ raise new_exc from caught_exc
+
+ finally:
+ connection.close()