simple golang fileserver

fileserver.go

package main

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

// simple golang fileserver
// alternative to `python -m http.server`

func main() {
	var path string
	flag.StringVar(&path, "dir", ".", "directory to serve")
	flag.Parse()
	fmt.Println("serving", path)
	listener, err := net.Listen("tcp", ":0")
	if err != nil {
		panic(err)
	}
	fmt.Println("listening on", listener.Addr())
	http.Handle("/", http.FileServer(http.Dir(path)))
	panic(http.Serve(listener, nil))
}