micro/client/rpc_codec.go

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package client
import (
"bytes"
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"github.com/micro/go-micro/transport"
rpc "github.com/youtube/vitess/go/rpcplus"
)
type rpcPlusCodec struct {
client transport.Client
codec rpc.ClientCodec
req *transport.Message
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buf *readWriteCloser
}
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type readWriteCloser struct {
wbuf *bytes.Buffer
rbuf *bytes.Buffer
}
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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
}
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func newRpcPlusCodec(req *transport.Message, client transport.Client, cf codecFunc) *rpcPlusCodec {
rwc := &readWriteCloser{
wbuf: bytes.NewBuffer(nil),
rbuf: bytes.NewBuffer(nil),
}
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r := &rpcPlusCodec{
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buf: rwc,
client: client,
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codec: cf(rwc),
req: req,
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}
return r
}
func (c *rpcPlusCodec) WriteRequest(req *rpc.Request, body interface{}) error {
if err := c.codec.WriteRequest(req, body); err != nil {
return err
}
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c.req.Body = c.buf.wbuf.Bytes()
return c.client.Send(c.req)
}
func (c *rpcPlusCodec) ReadResponseHeader(r *rpc.Response) error {
var m transport.Message
if err := c.client.Recv(&m); err != nil {
return err
}
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c.buf.rbuf.Reset()
c.buf.rbuf.Write(m.Body)
return c.codec.ReadResponseHeader(r)
}
func (c *rpcPlusCodec) ReadResponseBody(r interface{}) error {
return c.codec.ReadResponseBody(r)
}
func (c *rpcPlusCodec) Close() error {
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c.buf.Close()
return c.client.Close()
}