func ExampleDecoder() {
l, err := net.Listen("tcp", ":564")
if err != nil {
log.Fatal(err)
}
rwc, err := l.Accept()
if err != nil {
log.Fatal(err)
}
d := styxproto.NewDecoder(rwc)
e := styxproto.NewEncoder(rwc)
for d.Next() {
switch msg := d.Msg().(type) {
case styxproto.Tversion:
log.Printf("Client wants version %s", msg.Version())
e.Rversion(8192, "9P2000")
case styxproto.Tread:
e.Rread(msg.Tag(), []byte("data data"))
case styxproto.Twrite:
log.Printf("Receiving %d bytes from client", msg.Count())
io.Copy(ioutil.Discard, msg)
}
}
}
func newConn(srv *Server, rwc io.ReadWriteCloser) *conn {
var msize int64 = styxproto.DefaultMaxSize
if srv.MaxSize > 0 {
if srv.MaxSize > styxproto.MinBufSize {
msize = srv.MaxSize
} else {
msize = styxproto.MinBufSize
}
}
var enc *styxproto.Encoder
var dec *styxproto.Decoder
if srv.TraceLog != nil {
enc = tracing.Encoder(rwc, func(m styxproto.Msg) {
srv.TraceLog.Printf("← %03d %s", m.Tag(), m)
})
dec = tracing.Decoder(rwc, func(m styxproto.Msg) {
srv.TraceLog.Printf("→ %03d %s", m.Tag(), m)
})
} else {
enc = styxproto.NewEncoder(rwc)
dec = styxproto.NewDecoder(rwc)
}
return &conn{
Decoder: dec,
Encoder: enc,
srv: srv,
rwc: rwc,
cx: context.TODO(),
msize: msize,
sessionFid: util.NewMap(),
pendingReq: util.NewMap(),
qidpool: qidpool.New(),
}
}
// Encoder creates a new styxproto.Encoder that traces messages
// before writing them to w.
func Encoder(w io.Writer, fn Func) *styxproto.Encoder {
rd, wr := io.Pipe()
encoder := styxproto.NewEncoder(wr)
decoder := styxproto.NewDecoderSize(rd, 8*kilobyte)
go func() {
for decoder.Next() {
fn(decoder.Msg())
styxproto.Write(w, decoder.Msg())
}
}()
return encoder
}
func (s testServer) runMsg(fn func(*styxproto.Encoder)) {
rd, wr := io.Pipe()
e := styxproto.NewEncoder(wr)
go func() {
e.Tversion(styxproto.DefaultMaxSize, "9P2000")
e.Tattach(0, 0, styxproto.NoFid, "", "")
fn(e)
e.Flush()
wr.Close()
}()
s.run(rd)
}