128 lines
2.6 KiB
Go
128 lines
2.6 KiB
Go
// Package jsonpb provides a json codec
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package jsonpb
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import (
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"bytes"
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"io"
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"io/ioutil"
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oldjsonpb "github.com/golang/protobuf/jsonpb"
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oldproto "github.com/golang/protobuf/proto"
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"github.com/unistack-org/micro/v3/codec"
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jsonpb "google.golang.org/protobuf/encoding/protojson"
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"google.golang.org/protobuf/proto"
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)
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var (
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JsonpbMarshaler = jsonpb.MarshalOptions{
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UseEnumNumbers: false,
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EmitUnpopulated: false,
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UseProtoNames: true,
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AllowPartial: false,
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}
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JsonpbUnmarshaler = jsonpb.UnmarshalOptions{
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DiscardUnknown: false,
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AllowPartial: false,
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}
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OldJsonpbMarshaler = oldjsonpb.Marshaler{
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OrigName: true,
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EmitDefaults: false,
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}
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OldJsonpbUnmarshaler = oldjsonpb.Unmarshaler{
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AllowUnknownFields: false,
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}
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)
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type jsonpbCodec struct{}
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func (c *jsonpbCodec) Marshal(v interface{}) ([]byte, error) {
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if v == nil {
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return nil, nil
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}
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switch m := v.(type) {
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case *codec.Frame:
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return m.Data, nil
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case proto.Message:
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return JsonpbMarshaler.Marshal(m)
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case oldproto.Message:
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buf, err := OldJsonpbMarshaler.MarshalToString(m)
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return []byte(buf), err
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}
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return nil, codec.ErrInvalidMessage
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}
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func (c *jsonpbCodec) Unmarshal(d []byte, v interface{}) error {
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if d == nil || v == nil {
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return nil
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}
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switch m := v.(type) {
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case *codec.Frame:
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m.Data = d
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return nil
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case proto.Message:
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return JsonpbUnmarshaler.Unmarshal(d, m)
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case oldproto.Message:
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return OldJsonpbUnmarshaler.Unmarshal(bytes.NewReader(d), m)
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}
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return codec.ErrInvalidMessage
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}
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func (c *jsonpbCodec) ReadHeader(conn io.ReadWriter, m *codec.Message, t codec.MessageType) error {
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return nil
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}
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func (c *jsonpbCodec) ReadBody(conn io.ReadWriter, b interface{}) error {
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if b == nil {
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return nil
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}
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switch m := b.(type) {
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case *codec.Frame:
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buf, err := ioutil.ReadAll(conn)
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if err != nil {
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return err
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}
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m.Data = buf
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return nil
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case oldproto.Message:
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return OldJsonpbUnmarshaler.Unmarshal(conn, m)
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case proto.Message:
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buf, err := ioutil.ReadAll(conn)
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if err != nil {
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return err
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}
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return JsonpbUnmarshaler.Unmarshal(buf, m)
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}
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return codec.ErrInvalidMessage
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}
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func (c *jsonpbCodec) Write(conn io.ReadWriter, m *codec.Message, b interface{}) error {
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if b == nil {
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return nil
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}
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switch m := b.(type) {
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case *codec.Frame:
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_, err := conn.Write(m.Data)
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return err
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case oldproto.Message:
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return OldJsonpbMarshaler.Marshal(conn, m)
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case proto.Message:
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buf, err := JsonpbMarshaler.Marshal(m)
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if err != nil {
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return err
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}
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_, err = conn.Write(buf)
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return err
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}
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return codec.ErrInvalidMessage
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}
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func (c *jsonpbCodec) String() string {
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return "jsonpb"
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}
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func NewCodec() codec.Codec {
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return &jsonpbCodec{}
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}
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