Go 语言 Web 编程系列（六）—— 基于 gorilla/mux 包实现路由匹配：路由中间件

func loggingMiddleware(next http.Handler) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        // Do stuff here
        log.Println(r.RequestURI)
        // Call the next handler, which can be another middleware in the chain, or the final handler.
        next.ServeHTTP(w, r)
    })
}

<?php
namespace App\Http\Middleware;

use Closure;
use Illuminate\Support\Facades\Log;

class RequestLog
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
{
        Log::info(request()->url());
        return $next($request);
    }
}

r := mux.NewRouter()
r.Use(loggingMiddleware)

postRouter := r.PathPrefix("/posts").Subrouter()
postRouter.Use(loggingMiddleware)

func checkToken(next http.Handler) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        // Do stuff here
        token := r.FormValue("token")
        if token == "xueyuanjun.com" {
            log.Printf("Token check success: %s\n", r.RequestURI)
            // Call the next handler, which can be another middleware in the chain, or the final handler.
            next.ServeHTTP(w, r)
        } else {
            http.Error(w, "Forbidden", http.StatusForbidden)
        }
    })
}

postRouter := r.PathPrefix("/posts").Subrouter()
postRouter.Use(checkToken)