micro/server/rpc_codec.go

97 lines
2.1 KiB
Go

package server
import (
"bytes"
"github.com/micro/go-micro/codec"
"github.com/micro/go-micro/codec/proto"
"github.com/micro/go-micro/transport"
rpc "github.com/youtube/vitess/go/rpcplus"
)
type rpcPlusCodec struct {
socket transport.Socket
codec codec.Codec
req *transport.Message
buf *readWriteCloser
}
type readWriteCloser struct {
wbuf *bytes.Buffer
rbuf *bytes.Buffer
}
var (
defaultCodecs = map[string]codec.NewCodec{
// "application/json": jsonrpc.NewServerCodec,
// "application/json-rpc": jsonrpc.NewServerCodec,
"application/protobuf": proto.NewCodec,
"application/proto-rpc": proto.NewCodec,
"application/octet-stream": proto.NewCodec,
}
)
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, c codec.NewCodec) rpc.ServerCodec {
rwc := &readWriteCloser{
rbuf: bytes.NewBuffer(req.Body),
wbuf: bytes.NewBuffer(nil),
}
r := &rpcPlusCodec{
buf: rwc,
codec: c(rwc),
req: req,
socket: socket,
}
return r
}
func (c *rpcPlusCodec) ReadRequestHeader(r *rpc.Request) error {
var m codec.Message
err := c.codec.ReadHeader(&m, codec.Request)
r.ServiceMethod = m.Method
r.Seq = m.Id
return err
}
func (c *rpcPlusCodec) ReadRequestBody(b interface{}) error {
return c.codec.ReadBody(b)
}
func (c *rpcPlusCodec) WriteResponse(r *rpc.Response, body interface{}, last bool) error {
c.buf.wbuf.Reset()
m := &codec.Message{
Method: r.ServiceMethod,
Id: r.Seq,
Error: r.Error,
Type: codec.Response,
}
if err := c.codec.Write(m, body); 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()
c.codec.Close()
return c.socket.Close()
}