Laravel 中間件

Laravel 中間件提供了一種方便的機制來過濾進入應用的 HTTP 請求

1.使用中件間

　在路由器中使用中間件：

Route::get('/', 'IndexController@index')->middleware('auth');

//使用多個中間件

Route::get('/', function () {  // })->middleware('first', 'second');

//指定類名

Route::get('admin/profile', function () {  // })->middleware(CheckAge::class);

//路由器組使用中間件，需要注冊中間件 在app/http/kernel.php 的 $routeMiddleware 屬性中：

Route::group(['middleware' => ['auth']], function () {  // });

//中間件組

//Laravel 帶有開箱即用的 web 和 api 中間件，包含了可能應用到 Web UI 和 API 路由的通用中間件：

Route::get('/', function () {  // })->middleware('web'); Route::group(['middleware' => ['web']], function () {  // });

//注：配置中間件組wed,api, 在 app/http/kernel.php 的 $middlewareGroups 屬性中

  在控制器中使用中間件：

public function __construct()
    {
        $this->middleware('auth');

        $this->middleware('log')->only('index');

        $this->middleware('subscribed')->except('store');
    }

 2.創建中間件

 中間件在 app/Http/Middleware 目錄內  新建類 

namespace App\Http\Middleware;

use Closure;

class className
{
    /**
     * 處理傳入的請求
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        return $next($request);
    }

}

 3.注冊中間件 

在 App\Http\Kernel 類內

protected $routeMiddleware = [
    'auth' => \Illuminate\Auth\Middleware\Authenticate::class,
    'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
    'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
    'can' => \Illuminate\Auth\Middleware\Authorize::class,
    'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
    'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
];

 4.中間件的參數

     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next,$role)
    {
        return $next($request);
    }

//使用中間件傳參數

Route::get('/', function () {  // })->middleware('first:role');