TCP Echo Server

tcp_echo_server.go

package main

import (
	"io"
	"net"
)

var host, port string

func handleConnection(c net.Conn) {
	defer c.Close()
	io.Copy(c, c)
}

func main() {
	host = "localhost"
	port = "7"

	listener, _ := net.Listen("tcp", net.JoinHostPort(host, port))

	for {
		connection, err := listener.Accept()
		if err != nil {
			continue
		}
		go handleConnection(connection)
	}
}

// $ nc localhost 8080
// Hello!
// Hello! ( will be sent back )