xx.com {
   @ws {
        path /f4aa1b2d-94e3-42a8-ae24-ba53a1af4815
        header Connection *Upgrade*
        header Upgrade websocket
   }
	@grpc {
	    protocol grpc
	}
    reverse_proxy @ws {
	    to http://127.0.0.1:2001
	}
	reverse_proxy @grpc {
	    to h2c://127.0.0.1:2002
        transport http {
            versions h2c 2
        }
	}
	reverse_proxy /h2 {
	    to h2c://127.0.0.1:2003
        transport http {
            versions h2c 2
        }
  }
  root * /var/www
  file_server
}