Simple go echo server

main.go

package main

import (
	"flag"
	"log"
	"net"
)

func echoServer(c net.Conn) {
	for {
		buf := make([]byte, 512)
		nr, err := c.Read(buf)
		if err != nil {
			return
		}

		data := buf[0:nr]
		println("Server got:", string(data))
		_, err = c.Write(data)
		if err != nil {
			log.Fatal("Write: ", err)
		}
	}
}

func main() {
	var l net.Listener
	var err error
	port := flag.String("port", "8080", "port to bind to")
	socket := flag.Bool("socket", true, "Listen to socket or to unix socket. Default: socket.")
	pathPtr := flag.String("path", "/tmp/echo.sock", "path to socket")
	flag.Parse()
	if *socket {
		l, err = net.Listen("tcp", *port)
	} else {
		l, err = net.Listen("unix", *pathPtr)
	}

	if err != nil {
		log.Fatal("listen error:", err)
	}

	for {
		conn, err := l.Accept()
		if err != nil {
			log.Fatal("accept error:", err)
		}

		go echoServer(conn)
	}
}