TCP server example. (For better small little servers out there.)

tcpserver.go

package main

import (
	"io"
	"log"
	"net"
	"time"
)

func main() {
	run()
}

func run() {
	log.Println("listening")
	l, err := net.Listen("tcp", "0.0.0.0:5000")
	if err != nil {
		log.Fatal(err)
	}
	defer l.Close()

	for {
		// Wait for a connection.
		conn, err := l.Accept()
		if err != nil {
			continue
		}
		go handleConn(conn)
	}
}

func handleConn(conn net.Conn) {
	for {
		data := make([]byte, 512)
		readLength, err := conn.Read(data)
		if err != nil {
			log.Println(err)
			// check for EOF
			if err == io.EOF {
				conn.Close()
				return
			}
			// check for timeout
			if neterr, ok := err.(net.Error); ok && neterr.Timeout() {
				conn.Close()
				return
			}
			continue
		}
		// set timeout whenever receiving new data
		conn.SetDeadline(time.Now().Add(60 * time.Second))
		log.Print(string(data)[:readLength])
	}
}

It just writes the stuff to the console. Handy for testing.