package main

import (
	"fmt"
	"net/http"
)

type reqExampleHandler int

func (hello reqExampleHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {

	if r.Method != http.MethodGet {
		http.Error(w, "Only GET requests are allowed", http.StatusMethodNotAllowed)
		return
	}

	fmt.Println("Method:", r.Method)
	fmt.Println("URL:", r.URL.String())
	fmt.Println("Host:", r.Host)
	fmt.Println("Accept-Header", r.Header.Get("Accept"))

	queryParams := r.URL.Query()
	fmt.Println("Query Parameters:")
	for key, values := range queryParams {
		for _, value := range values {
			fmt.Printf("  %s = %s\n", key, value)
		}
	}

	w.Write([]byte("<h1>GET: http.Request-Beispiel<h1>"))
}

func main() {
	var r reqExampleHandler
	http.ListenAndServe("localhost:8080", r)
}