如何在go中从多路复用器中获取可用的路由？

package main

import (
	"fmt"
	"net/http"
)

func main() {
	mux := http.NewServeMux()

	// 注册处理函数
	mux.HandleFunc("/", homeHandler)
	mux.HandleFunc("/about", aboutHandler)

	// 创建HTTP服务器
	server := &http.Server{
		Addr:    ":8080",
		Handler: mux,
	}

	// 启动服务器
	err := server.ListenAndServe()
	if err != nil {
		fmt.Println("Server error:", err)
	}
}

func homeHandler(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintln(w, "Welcome to the home page!")
}

func aboutHandler(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintln(w, "This is the about page!")
}