forked from gammazero/nexus
/
msgpackserializer.go
63 lines (52 loc) · 1.82 KB
/
msgpackserializer.go
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package serialize
import (
"errors"
"reflect"
"github.com/dtegapp/nexus/v3/wamp"
"github.com/ugorji/go/codec"
)
var mh *codec.MsgpackHandle
func init() {
mh = new(codec.MsgpackHandle)
mh.WriteExt = true
mh.MapType = reflect.TypeOf(map[string]interface{}(nil))
}
// MsgpackRegisterExtension registers a custom type for special serialization.
func MsgpackRegisterExtension(t reflect.Type, ext byte, encode func(reflect.Value) ([]byte, error), decode func(reflect.Value, []byte) error) error { //nolint:lll
return mh.AddExt(t, ext, encode, decode)
}
// MessagePackSerializer is an implementation of Serializer that handles
// serializing and deserializing msgpack encoded payloads.
type MessagePackSerializer struct{}
// Serialize encodes a Message into a msgpack payload.
func (s *MessagePackSerializer) Serialize(msg wamp.Message) ([]byte, error) {
var b []byte
err := codec.NewEncoderBytes(&b, mh).Encode(msgToList(msg))
return b, err
}
// Deserialize decodes a msgpack payload into a Message.
func (s *MessagePackSerializer) Deserialize(data []byte) (wamp.Message, error) {
var v []interface{}
err := codec.NewDecoderBytes(data, mh).Decode(&v)
if err != nil {
return nil, err
}
if len(v) == 0 {
return nil, errors.New("invalid message")
}
typ, ok := v[0].(int64)
if !ok {
return nil, errors.New("unsupported message format")
}
return listToMsg(wamp.MessageType(typ), v)
}
// SerializeDataItem encodes any object/structure into a msgpack payload.
func (s *MessagePackSerializer) SerializeDataItem(item interface{}) ([]byte, error) {
var b []byte
err := codec.NewEncoderBytes(&b, mh).Encode(item)
return b, err
}
// DeserializeDataItem decodes a json payload into an object/structure.
func (s *MessagePackSerializer) DeserializeDataItem(data []byte, v interface{}) error {
return codec.NewDecoderBytes(data, mh).Decode(&v)
}