Is “google/protobuf/struct.proto” the best way to send dynamic JSON over GRPC?

Question

I have a written a simple GRPC server and a client to call the server (both in Go). Please tell me if using golang/protobuf/struct is the best way to send a dynamic JSON with GR

Answer 1

I ended up using a two-step conversion with protojson, from map to json to struct:

m := map[string]interface{}{
  "foo":"bar",
  "baz":123,
}
b, err := json.Marshal(m)
s := &structpb.Struct{}
err = protojson.Unmarshal(b, s)

I don't find it elegant but could not really find any official documentation of how to do this differently. I also prefer to produce structures using "official" functions rather than trying to build a structure myself.