For the legacy

server/rpc_stream.go

@@ -31,6 +31,8 @@ func (r *rpcStream) Send(msg interface{}) error {
 	defer r.Unlock()
 
 	resp := codec.Message{
+		Target:   r.request.Service(),
+		Method:   r.request.Method(),
 		Endpoint: r.request.Endpoint(),
 		Id:       r.id,
 		Type:     codec.Response,