Hi all, I'm doing a simple message serialization, message defines like
below:
type Envelope struct {
Magic uint32
DataSize uint32
}
type Message struct {
Envelope
Data []byte
}
and I want to implement the io.WriterTo interface for Message
func (m *Message) WriteTo(w io.Writer) (n int64, err error) {
err = binary.Write(w, binary.BigEndian, &m.Envelope)
if err != nil {
// here, how should I return a proper n? Since w maybe *net.TCPConn
and binary.Write maybe write 1 bytes and peer has dropped the connection.
return 0, fmt.Errorf("Write message envelope error: %s", err)
}
// multiple lines skipped
}
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