micro-codec-proto/proto.go

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// Package proto provides a proto codec
package proto
import (
"io"
"io/ioutil"
"github.com/unistack-org/micro/v3/codec"
"google.golang.org/protobuf/proto"
)
type Codec struct {
Conn io.ReadWriteCloser
}
func (c *Codec) Marshal(v interface{}) ([]byte, error) {
m, ok := v.(proto.Message)
if !ok {
return nil, codec.ErrInvalidMessage
}
return proto.Marshal(m)
}
func (c *Codec) Unmarshal(data []byte, v interface{}) error {
m, ok := v.(proto.Message)
if !ok {
return codec.ErrInvalidMessage
}
return proto.Unmarshal(data, m)
}
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
}
buf, err := ioutil.ReadAll(c.Conn)
if err != nil {
return err
}
m, ok := b.(proto.Message)
if !ok {
return codec.ErrInvalidMessage
}
return proto.Unmarshal(buf, m)
}
func (c *Codec) Write(m *codec.Message, b interface{}) error {
if b == nil {
// Nothing to write
return nil
}
p, ok := b.(proto.Message)
if !ok {
return codec.ErrInvalidMessage
}
buf, err := proto.Marshal(p)
if err != nil {
return err
}
_, err = c.Conn.Write(buf)
return err
}
func (c *Codec) Close() error {
return c.Conn.Close()
}
func (c *Codec) String() string {
return "proto"
}
func NewCodec(c io.ReadWriteCloser) codec.Codec {
return &Codec{
Conn: c,
}
}