How to use the daphne.http_protocol.WebRequest function in daphne

def buildProtocol(self, addr):
        """
        Builds protocol instances. This override is used to ensure we use our
        own Request object instead of the default.
        """
        try:
            protocol = http.HTTPFactory.buildProtocol(self, addr)
            protocol.requestFactory = WebRequest
            return protocol
        except Exception:
            logger.error("Cannot build protocol: %s" % traceback.format_exc())
            raise