Simple web server returns hostname

main.go

package main

import (
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
	"time"
)

var (
	listenAddr string
)

func main() {
	flag.StringVar(&listenAddr, "addr", ":8080", "server listen address")
	flag.Parse()

	log.Printf("Server started at %s ", listenAddr)
	hostname, err := os.Hostname()
	if err != nil {
		log.Panic(err)
	}

	http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
		fmt.Fprintf(w, "Your hostname is: %s", hostname)
	})

	server := &http.Server{
		Addr:         listenAddr,
		ReadTimeout:  time.Second,
		WriteTimeout: time.Second,
		IdleTimeout:  time.Second,
	}
	
	// let's the hunt begin
	if err := server.ListenAndServe(); err != nil {
		log.Fatal(err)
	}
}