package main

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

func index(rw http.ResponseWriter, req *http.Request) {
	fmt.Fprintln(rw, "I was here!")
}

func main() {
	port := flag.Int("port", 8080, "port to listen at.")
	host := flag.String("host", "localhost", "host to listen at.")
	flag.Parse()

	mux := http.NewServeMux()
	mux.HandleFunc("/", index)

	addr := fmt.Sprintf("%s:%d", *host, *port)
	log.Fatalln(http.ListenAndServe(addr, mux))
}