chore: import upstream snapshot with attribution

codec/json/json.go

@@ -0,0 +1,68 @@
+// Package json provides a json codec
+package json
+
+import (
+	"encoding/json"
+	"io"
+
+	"go-micro.dev/v6/codec"
+	"google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/proto"
+)
+
+type Codec struct {
+	Conn    io.ReadWriteCloser
+	Encoder *json.Encoder
+	Decoder *json.Decoder
+}
+
+func (c *Codec) ReadHeader(m *codec.Message, t codec.MessageType) error {
+	return nil
+}
+
+func (c *Codec) ReadBody(b interface{}) error {
+	if b == nil {
+		return nil
+	}
+	if pb, ok := b.(proto.Message); ok {
+		// Read all JSON data from decoder
+		var raw json.RawMessage
+		if err := c.Decoder.Decode(&raw); err != nil {
+			return err
+		}
+		return protojson.Unmarshal(raw, pb)
+	}
+	return c.Decoder.Decode(b)
+}
+
+func (c *Codec) Write(m *codec.Message, b interface{}) error {
+	if b == nil {
+		return nil
+	}
+	if pb, ok := b.(proto.Message); ok {
+		data, err := protojson.Marshal(pb)
+		if err != nil {
+			return err
+		}
+		// Write the marshaled data to the encoder
+		var raw json.RawMessage = data
+		return c.Encoder.Encode(raw)
+	}
+	return c.Encoder.Encode(b)
+}
+
+func (c *Codec) Close() error {
+	return c.Conn.Close()
+}
+
+func (c *Codec) String() string {
+	return "json"
+}
+
+func NewCodec(c io.ReadWriteCloser) codec.Codec {
+	return &Codec{
+		Conn:    c,
+		Decoder: json.NewDecoder(c),
+		Encoder: json.NewEncoder(c),
+	}
+}