docs: def VerifyServerControlResponse(self, http_object):
      """Verify the server response to a 'control' endpoint POST message.
  
      We consider the message correct if and only if we can decrypt it
      properly. Note that in practice we can not use the HTTP status to figure out
      if the request worked because captive proxies have a habit of lying and
      returning a HTTP success code even when there is no connectivity.
  
      Args:
        http_object: The HTTPObject returned from the HTTP transaction.
  
      Returns:
        True if the http_object is correct. False if it is not valid.
  
      Side Effect:
        Fill in the decoded_data attribute in the http_object.
      """
      if http_object.code != 200:
        return False
  
      # Try to decrypt the message into the http_object.
      try:
        http_object.messages, http_object.source, http_object.nonce = (
            self.communicator.DecryptMessage(http_object.data))
  
        return True
  
      # Something went wrong - the response seems invalid!
      except communicator.DecodingError as e:
        logging.info("Protobuf decode error: %s.", e)
        return False