_http_client.py 文件源码

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)
            six.raise_from(new_exc, caught_exc)

        finally:
            connection.close()