save chi routes to a txt file

chi-walker.go

package main

import (
	"fmt"
	"net/http"
	"os"
	"strings"

	"github.com/go-chi/chi"
	"github.com/go-chi/chi/middleware"
)

func main() {
	r := chi.NewRouter()
	r.Use(middleware.RequestID)
	r.Use(middleware.RealIP)
	r.Use(middleware.Logger)

	r.Get("/", rudy)
	r.Get("/recv", recv)
	r.Get("/send", send)

	f, err := os.Create("routes.txt")
	if err != nil {
		fmt.Println(err)
	}
	defer f.Close()

	walker := func(method string, route string, handler http.Handler, middlewares ...func(http.Handler) http.Handler) error {
		route = strings.Replace(route, "/*/", "/", -1)
		s := fmt.Sprintf("%s\t\t%s\n", method, route)

		_, err = f.WriteString(s)
		if err != nil {
			return err
		}
		return nil
	}

	if err := chi.Walk(r, walker); err != nil {
		fmt.Printf("Error: %s\n", err.Error())
	}
	http.ListenAndServe(":3333", r)
}

func recv(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("received"))
}

func send(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("sent"))
}

func rudy(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("rudy? yeah!"))
}