http.py 文件源码

def _execute(self, http, order, requests):
    """Serialize batch request, send to server, process response.

    Args:
      http: httplib2.Http, an http object to be used to make the request with.
      order: list, list of request ids in the order they were added to the
        batch.
      request: list, list of request objects to send.

    Raises:
      httplib2.HttpLib2Error if a transport error has occured.
      apiclient.errors.BatchError if the response is the wrong format.
    """
    message = MIMEMultipart('mixed')
    # Message should not write out it's own headers.
    setattr(message, '_write_headers', lambda self: None)

    # Add all the individual requests.
    for request_id in order:
      request = requests[request_id]

      msg = MIMENonMultipart('application', 'http')
      msg['Content-Transfer-Encoding'] = 'binary'
      msg['Content-ID'] = self._id_to_header(request_id)

      body = self._serialize_request(request)
      msg.set_payload(body)
      message.attach(msg)

    body = message.as_string()

    headers = {}
    headers['content-type'] = ('multipart/mixed; '
                               'boundary="%s"') % message.get_boundary()

    resp, content = http.request(self._batch_uri, method='POST', body=body,
                                 headers=headers)

    if resp.status >= 300:
      raise HttpError(resp, content, uri=self._batch_uri)

    # Now break out the individual responses and store each one.
    boundary, _ = content.split(None, 1)

    # Prepend with a content-type header so FeedParser can handle it.
    header = 'content-type: %s\r\n\r\n' % resp['content-type']
    for_parser = header + content

    parser = FeedParser()
    parser.feed(for_parser)
    mime_response = parser.close()

    if not mime_response.is_multipart():
      raise BatchError("Response not in multipart/mixed format.", resp=resp,
                       content=content)

    for part in mime_response.get_payload():
      request_id = self._header_to_id(part['Content-ID'])
      response, content = self._deserialize_response(part.get_payload())
      self._responses[request_id] = (response, content)