http_static_server.go

package main

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

const (
	defaultPort = 9999
	defaultDir  = "."
)

func main() {
	port := flag.Int("port", defaultPort, "server port")
	dir := flag.String("dir", defaultDir, "served dir")
	flag.Parse()

	handler := http.FileServer(http.Dir(*dir))

	fmt.Println("served dir:", *dir)
	fmt.Printf("start http static server on http://127.0.0.1:%d\n", *port)

	http.ListenAndServe(fmt.Sprintf(":%d", *port), handler)
}