negroni, gorilla and middleware

web.go

package main

import (
	"fmt"
	"log"
	"net/http"

	"github.com/codegangsta/negroni"
	"github.com/gorilla/mux"
)

type Handler func(w http.ResponseWriter, r *http.Request)

func main() {
	r := mux.NewRouter().StrictSlash(false)
	r.HandleFunc("/", GenericHandler("Home Page"))
	r.HandleFunc("/page1", GenericHandler("Page 1"))
	r.HandleFunc("/page2", GenericHandler("Page 2"))

	api := r.PathPrefix("/auth").Subrouter()
	api.HandleFunc("/login", GenericHandler("login"))
	api.HandleFunc("/logout", GenericHandler("logout"))

	mux1 := http.NewServeMux()
	mux1.Handle("/", negroni.New(
		negroni.HandlerFunc(AuthMiddleware),
		negroni.Wrap(r),
	))

	mux1.Handle("/auth/", negroni.New(
		negroni.HandlerFunc(LoggingMiddleware),
		negroni.Wrap(r),
	))

	n := negroni.Classic()
	n.UseHandler(mux1)
	http.ListenAndServe(":3000", n)
}

func GenericHandler(s string) Handler {
	return func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, s)
	}
}

func AuthMiddleware(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
	log.Println("AuthMiddleware")
	next(w, r)
}

func LoggingMiddleware(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
	log.Println("LoggingMiddleware")
	next(w, r)
}