89 lines
1.6 KiB
Go
89 lines
1.6 KiB
Go
package json
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"github.com/micro/go-micro/codec"
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)
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type jsonCodec struct {
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buf *bytes.Buffer
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mt codec.MessageType
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rwc io.ReadWriteCloser
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c *clientCodec
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s *serverCodec
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}
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func (j *jsonCodec) Close() error {
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j.buf.Reset()
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return j.rwc.Close()
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}
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func (j *jsonCodec) String() string {
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return "json"
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}
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func (j *jsonCodec) Write(m *codec.Message, b interface{}) error {
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switch m.Type {
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case codec.Request:
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return j.c.Write(m, b)
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case codec.Response:
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return j.s.Write(m, b)
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case codec.Publication:
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data, err := json.Marshal(b)
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if err != nil {
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return err
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}
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_, err = j.rwc.Write(data)
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return err
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default:
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return fmt.Errorf("Unrecognised message type: %v", m.Type)
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}
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return nil
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}
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func (j *jsonCodec) ReadHeader(m *codec.Message, mt codec.MessageType) error {
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j.buf.Reset()
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j.mt = mt
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switch mt {
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case codec.Request:
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return j.s.ReadHeader(m)
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case codec.Response:
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return j.c.ReadHeader(m)
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case codec.Publication:
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io.Copy(j.buf, j.rwc)
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default:
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return fmt.Errorf("Unrecognised message type: %v", mt)
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}
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return nil
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}
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func (j *jsonCodec) ReadBody(b interface{}) error {
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switch j.mt {
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case codec.Request:
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return j.s.ReadBody(b)
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case codec.Response:
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return j.c.ReadBody(b)
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case codec.Publication:
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if b != nil {
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return json.Unmarshal(j.buf.Bytes(), b)
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}
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default:
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return fmt.Errorf("Unrecognised message type: %v", j.mt)
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}
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return nil
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}
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func NewCodec(rwc io.ReadWriteCloser) codec.Codec {
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return &jsonCodec{
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buf: bytes.NewBuffer(nil),
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rwc: rwc,
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c: newClientCodec(rwc),
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s: newServerCodec(rwc),
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}
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}
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