micro/server/rpc_codec.go

90 lines
2.0 KiB
Go

package server
import (
"bytes"
"fmt"
"github.com/myodc/go-micro/transport"
rpc "github.com/youtube/vitess/go/rpcplus"
js "github.com/youtube/vitess/go/rpcplus/jsonrpc"
pb "github.com/youtube/vitess/go/rpcplus/pbrpc"
)
type rpcPlusCodec struct {
socket transport.Socket
codec rpc.ServerCodec
req *transport.Message
buf *readWriteCloser
}
type readWriteCloser struct {
wbuf *bytes.Buffer
rbuf *bytes.Buffer
}
func (rwc *readWriteCloser) Read(p []byte) (n int, err error) {
return rwc.rbuf.Read(p)
}
func (rwc *readWriteCloser) Write(p []byte) (n int, err error) {
return rwc.wbuf.Write(p)
}
func (rwc *readWriteCloser) Close() error {
rwc.rbuf.Reset()
rwc.wbuf.Reset()
return nil
}
func newRpcPlusCodec(req *transport.Message, socket transport.Socket) rpc.ServerCodec {
r := &rpcPlusCodec{
socket: socket,
req: req,
buf: &readWriteCloser{
rbuf: bytes.NewBuffer(req.Body),
wbuf: bytes.NewBuffer(nil),
},
}
switch req.Header["Content-Type"] {
case "application/octet-stream":
r.codec = pb.NewServerCodec(r.buf)
case "application/json":
r.codec = js.NewServerCodec(r.buf)
}
return r
}
func (c *rpcPlusCodec) ReadRequestHeader(r *rpc.Request) error {
if c.codec == nil {
return fmt.Errorf("unsupported content type %s", c.req.Header["Content-Type"])
}
return c.codec.ReadRequestHeader(r)
}
func (c *rpcPlusCodec) ReadRequestBody(r interface{}) error {
return c.codec.ReadRequestBody(r)
}
func (c *rpcPlusCodec) WriteResponse(r *rpc.Response, body interface{}, last bool) error {
if c.codec == nil {
return fmt.Errorf("unsupported request type: %s", c.req.Header["Content-Type"])
}
c.buf.wbuf.Reset()
if err := c.codec.WriteResponse(r, body, last); err != nil {
return err
}
return c.socket.Send(&transport.Message{
Header: map[string]string{"Content-Type": c.req.Header["Content-Type"]},
Body: c.buf.wbuf.Bytes(),
})
}
func (c *rpcPlusCodec) Close() error {
c.buf.Close()
return c.socket.Close()
}