Golang HTTP/3 fileserver example

fileServer.go

package main

import (
	"flag"
	"fmt"
	"log"
	"net/http"
	"path"
	
	"github.com/lucas-clemente/quic-go/http3"
)

func main() {
	listenPort := flag.String("port", "3000", "port to listen on")
	wwwDir := flag.String("wwwDir", "public", "directory with html to be served")
	certPath := flag.String("certPath", "cert", "path to the ca cert pem")
	flag.Parse()

	fs := http.Handler(http.FileServer(http.Dir(*wwwDir)))

	certPathName := path.Join(*certPath, "cert.pem")
	privPathName := path.Join(*certPath, "priv.key")
	
	log.Printf("Serving on :%s", *listenPort)
	log.Fatal(http3.ListenAndServeQUIC(fmt.Sprintf(":%s", *listenPort), 
		fmt.Sprintf("%s", certPathName), 
		fmt.Sprintf("%s", privPathName), fs))
}