add storage and mux handle with handlers

handler/encoders/json.go

@@ -0,0 +1,25 @@
+package encoders
+
+import (
+	"encoding/json"
+	pb "go.unistack.org/unistack-org/pkgdash/proto/go_generate"
+	"net/http"
+
+	"github.com/pkg/errors"
+)
+
+type JSON struct{}
+
+func (*JSON) Success(rw http.ResponseWriter, response interface{}) error {
+	rw.Header().Set("Content-Type", "application/json; charset=utf-8")
+	rw.WriteHeader(http.StatusOK)
+
+	return errors.WithStack(json.NewEncoder(rw).Encode(response))
+}
+
+func (*JSON) Error(rw http.ResponseWriter, err *pb.Error, status int) error {
+	rw.Header().Set("Content-Type", "application/problem+json; charset=utf-8")
+	rw.WriteHeader(status)
+
+	return errors.WithStack(json.NewEncoder(rw).Encode(&pb.ErrorRsp{Error: err}))
+}

handler/encoders/jsonpb.go

@@ -0,0 +1,51 @@
+package encoders
+
+import (
+	"github.com/pkg/errors"
+	pb "go.unistack.org/unistack-org/pkgdash/proto/go_generate"
+	"google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/proto"
+	"io"
+	"net/http"
+)
+
+var ErrWrongResponseType = errors.New("JSONProto: wrong response message type")
+
+type JSONProto struct {
+	m protojson.MarshalOptions
+}
+
+func NewJSONProto() *JSONProto {
+	return &JSONProto{m: protojson.MarshalOptions{
+		EmitUnpopulated: true,
+		UseProtoNames:   false,
+	}}
+}
+
+func (e *JSONProto) Success(rw http.ResponseWriter, response interface{}) error {
+	rw.Header().Set("Content-Type", "application/json; charset=utf-8")
+	rw.WriteHeader(http.StatusOK)
+
+	if v, ok := response.(proto.Message); ok {
+		return errors.WithStack(e.Fmarshal(rw, v))
+	}
+
+	return ErrWrongResponseType
+}
+
+func (e *JSONProto) Error(rw http.ResponseWriter, err *pb.Error, status int) error {
+	rw.Header().Set("Content-Type", "application/problem+json; charset=utf-8")
+	rw.WriteHeader(status)
+
+	return errors.WithStack(e.Fmarshal(rw, &pb.ErrorRsp{Error: err}))
+}
+
+func (e *JSONProto) Fmarshal(w io.Writer, m proto.Message) error {
+	b, err := e.m.Marshal(m)
+	if len(b) > 0 {
+		if _, err = w.Write(b); err != nil {
+			return err
+		}
+	}
+	return err
+}