package json import ( "encoding/json" "github.com/golang/protobuf/jsonpb" "github.com/golang/protobuf/proto" ) type Marshaler struct{} func (j Marshaler) Marshal(v interface{}) ([]byte, error) { return json.Marshal(v) } func (j Marshaler) Unmarshal(d []byte, v interface{}) error { if pb, ok := v.(proto.Message); ok { return jsonpb.UnmarshalString(string(d), pb) } return json.Unmarshal(d, v) } func (j Marshaler) String() string { return "json" }