注册中间件

全局中间件

如果你希望中间件在应用处理每个 HTTP 请求期间运行， 只需要在 app/Http/Kernel.php 中的 $middleware 属性中列出这个中间件。

protected $middleware = [
    \App\Http\Middleware\TrustProxies::class,
    \Fruitcake\Cors\HandleCors::class,
    \App\Http\Middleware\PreventRequestsDuringMaintenance::class,
    \Illuminate\Foundation\Http\Middleware\ValidatePostSize::class,
    \App\Http\Middleware\TrimStrings::class,
    \Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull::class,
];

为路由分配中间件

假设你想为指定的路由分配中间件 ， 首先应该在** app/Http/Kernel.ph**p 文件内为该中间件分配一个键。默认情况下，该类中的 $routeMiddleware 属性下包含了 Laravel 内置的中间件。若要加入自定义的中间件，只需把它附加到列表后并为其分配一个自定义键。例如：

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

在 HTTP 内核中定义了中间件后，您可以使用 middleware 方法将中间件分配给路由：

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

分配中间件时，您还可以传递完全限定的类名：

use App\Http\Middleware\CheckAge;
Route::get('admin/profile', function () {
    //
})->middleware(CheckAge::class);