Simple HTTP2 echo headers

http2.go

package main

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

var keyPath string
var crtPath string

func init() {
	flag.StringVar(&keyPath, "tls-key", "server.key", "Path of TLS private key")
	flag.StringVar(&crtPath, "tls-crt", "server.crt", "Path of TLS certificate / public key")
	flag.Parse()
}

func main() {
	srv := &http.Server{Addr: ":8000", Handler: http.HandlerFunc(handle)}

	log.Printf("Serving on https://0.0.0.0:8000")

	// to generate keys: openssl req -newkey rsa:2048 -nodes -keyout server.key -x509 -days 365 -out server.crt
	log.Fatal(srv.ListenAndServeTLS(crtPath, keyPath))
}

func handle(w http.ResponseWriter, r *http.Request) {
	delay, err := time.ParseDuration(r.URL.Query().Get("delay"))

	if err == nil {
		time.Sleep(delay)
	}

	fmt.Fprintf(w, "%s %s %s\n", r.Method, r.RequestURI, r.Proto)
	log.Printf("%s %s %s - (remoteAddr: %s, delay: %v)\n", r.Method, r.RequestURI, r.Proto, r.RemoteAddr, delay)
	for name, headers := range r.Header {
		for _, h := range headers {
			fmt.Fprintf(w, "%v: %v\n", name, h)
		}
	}
}