def stage_http_request(self, conn_id, version, url, target, method, headers,
                           payload):
        """Set request HTTP information including url, headers, etc."""
        # pylint: disable=attribute-defined-outside-init
        self._http_request_version = version
        self._http_request_conn_id = conn_id
        self._http_request_url = url
        self._http_request_target = target
        self._http_request_method = method
        self._http_request_headers = headers
        self._http_request_payload = payload
Set request HTTP information including url, headers, etc.