// Decoder creates a new styxproto.Decoder that traces messages
// received on r.
func Decoder(r io.Reader, fn Func) *styxproto.Decoder {
rd, wr := io.Pipe()
decoderInput := styxproto.NewDecoderSize(r, 8*kilobyte)
decoderTrace := styxproto.NewDecoderSize(rd, 8*kilobyte)
go func() {
for decoderInput.Next() {
fn(decoderInput.Msg())
styxproto.Write(wr, decoderInput.Msg())
}
wr.Close()
}()
return decoderTrace
}
// 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
}