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library/net/rpc/warden/encoding/json/BUILD

@@ -0,0 +1,33 @@
+package(default_visibility = ["//visibility:public"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = ["json.go"],
+    importpath = "go-common/library/net/rpc/warden/encoding/json",
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+    deps = [
+        "@com_github_gogo_protobuf//jsonpb:go_default_library",
+        "@com_github_gogo_protobuf//proto:go_default_library",
+        "@org_golang_google_grpc//encoding:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

library/net/rpc/warden/encoding/json/json.go

@@ -0,0 +1,53 @@
+package codec
+
+import (
+	"bytes"
+	"encoding/json"
+
+	"github.com/gogo/protobuf/jsonpb"
+	"github.com/gogo/protobuf/proto"
+	"google.golang.org/grpc/encoding"
+)
+
+//Reference https://jbrandhorst.com/post/grpc-json/
+func init() {
+	encoding.RegisterCodec(JSON{
+		Marshaler: jsonpb.Marshaler{
+			EmitDefaults: true,
+			OrigName:     true,
+		},
+	})
+}
+
+// JSON is impl of encoding.Codec
+type JSON struct {
+	jsonpb.Marshaler
+	jsonpb.Unmarshaler
+}
+
+// Name is name of JSON
+func (j JSON) Name() string {
+	return "json"
+}
+
+// Marshal is json marshal
+func (j JSON) Marshal(v interface{}) (out []byte, err error) {
+	if pm, ok := v.(proto.Message); ok {
+		b := new(bytes.Buffer)
+		err := j.Marshaler.Marshal(b, pm)
+		if err != nil {
+			return nil, err
+		}
+		return b.Bytes(), nil
+	}
+	return json.Marshal(v)
+}
+
+// Unmarshal is json unmarshal
+func (j JSON) Unmarshal(data []byte, v interface{}) (err error) {
+	if pm, ok := v.(proto.Message); ok {
+		b := bytes.NewBuffer(data)
+		return j.Unmarshaler.Unmarshal(b, pm)
+	}
+	return json.Unmarshal(data, v)
+}