func handleRead(conn net.Conn, done chan string)  {

    for {

        buf := make([]byte, )

        reqLen, err := conn.Read(buf)

        if err != nil {

            fmt.Println("Error to read message", err.Error())

            return

        }

        fmt.Println(string(buf[:reqLen - ]))

        // 转化为16进制

        buffer := new(bytes.Buffer)

        for _, b := range buf[:reqLen] {

            s := strconv.FormatInt(int64(b&0xff), )

            if len(s) ==  {

                buffer.WriteString("")

            }

            buffer.WriteString(s)

        }

        // 转化为字符串

        fmt.Println(buffer.String())

    }

    //done <- "read"

}