Hi i'm attempted to learn some socket programming in golang, I'm following along with this tutorial
http://synflood.at/tmp/golang-slides/mrmcd2012.html#1
Here is the final result of the tutorial on one page.https://github.com/akrennmair/telnet-chat/blob/master/03_chat/chat.go
I'm confused on how to write the client side of this program, I create a connection and dial into the same port/ip as the server is running on but from there I don't know. I have read() and write() functions for the newly created connection but no idea where to delimit the read or anything. Considering the text input is handeled in the server I imagine I'd only need to do a read of some kind?
package mainimport ("bufio""fmt""net""os")func main() {conn, err := net.Dial("tcp", "127.0.0.1:6000")if err != nil {fmt.Println(err)os.Exit(1)}for {fmt.Println(bufio.NewReader(conn).ReadString([]byte("\n")))}}Best Answer
bufio.NewReadershould be used only once, in your case, just before the for. For example connbuf := bufio.NewReader(conn). Then you can use ReadString on connbuf, that returns the string and maybe an error. For example:
connbuf := bufio.NewReader(conn)for{str, err := connbuf.ReadString('\n')if err != nil {break}if len(str) > 0 {fmt.Println(str)}}I'm checking lenand err because ReadString may return data and an error (connection error, connection reset, etc.) so you need to check both.
Here is a simple solution if you want to read all received data.
connbuf := bufio.NewReader(c.m_socket)// Read the first byte and set the underlying bufferb, _ := connbuf.ReadByte() if connbuf.Buffered() > 0 {var msgData []bytemsgData = append(msgData, b)for connbuf.Buffered() > 0 {// read byte by byte until the buffered data is not emptyb, err := connbuf.ReadByte()if err == nil {msgData = append(msgData, b)} else {log.Println("-------> unreadable caracter...", b)}}// msgData now contain the buffered data...}