simple socket server with keepalive

socket_server.go

package main

import (
    "fmt"
    "net"
    "os"
    "time"
)

func main() {
    service := ":55555"
    tcpAddr, err := net.ResolveTCPAddr("tcp4", service)
    checkError(err)
    listener, err := net.ListenTCP("tcp", tcpAddr)
    checkError(err)
    for {
        conn, err := listener.Accept()
        if err != nil {
            continue
        }
        go handleClient(conn)
    }
}

func handleClient(conn net.Conn) {
    conn.SetReadDeadline(time.Now().Add(2 * time.Minute))
    buffer := make([]byte, 1024)
    defer conn.Close()
    for {
        read_len, err := conn.Read(buffer)

        if err != nil {
            break
        }

        message := string(buffer[:read_len])

        if read_len == 0 {
            break
        } else {
            ret := message + "too!"
            conn.Write([]byte(ret))
        }
    }
}

func checkError(err error) {
    if err != nil {
        fmt.Fprintf(os.Stderr, "Fatal error: %s", err.Error())
        os.Exit(1)
    }
}