gfs.go

package main

import (
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/exec"
	"runtime"
)

func main() {
	pwd, err := os.Getwd()
	if err != nil {
		log.Fatal(err)
		os.Exit(1)
	}

	dir := flag.String("d", ".", "Directory to serve")
	port := flag.String("p", "8100", "Port to serve on")
	help := flag.Bool("h", false, "Print help message")
	open := flag.Bool("o", false, "Open default browser")

	flag.Set("h", "help")
	flag.Set("o", "open")
	flag.Parse()

	if *help {
		fmt.Println(os.Args[0], "is Go File Server\n")
		fmt.Println("Usage of", os.Args[0]+":")
		flag.PrintDefaults()
		fmt.Println("\nSPDX-License-Identifier: MIT (https://spdx.org/licenses/MIT)")
		os.Exit(0)
	}

	url := "http://localhost:" + *port

	if *open {
		switch runtime.GOOS {
		case "linux":
			err = exec.Command("xdg-open", url).Start()
		case "windows":
			err = exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
		case "darwin":
			err = exec.Command("open", url).Start()
		default:
			log.Fatal("unsupported platform")
		}
		if err != nil {
			log.Fatal(err)
		}
	}

	log.Println("Serving", pwd, "on", url)
	log.Fatal(http.ListenAndServe(":"+*port, http.FileServer(http.Dir(*dir))))
}