[PHP] Laravel5.1框架注册中间件的三种场景详解

在Laravel中注册中间件主要有三种场景，一种给控制器中的方法进行注册，一种是给整个控制器进行注册，最后一种是给全局注册中间件。

• 1、在控制器中的方法中注册中间件
  

Route::get('/', ['middleware'=>['App\Http\Middleware\EmailMiddleware'],'uses'=>'IndexController@index']);

• 2、在整个控制器中注册中间件
  

<?php
namespace App\Http\Controllers;
use Illuminate\Foundation\Bus\DispatchesJobs;
use Illuminate\Routing\Controller as BaseController;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
abstract class Controller extends BaseController
{
  use AuthorizesRequests, DispatchesJobs, ValidatesRequests;
}

protected $middleware = [];

<?php
namespace Illuminate\Routing;
use BadMethodCallException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
abstract class Controller
{
  /**
   * The middleware registered on the controller.
   *
   * @var array
   */
  protected $middleware = [];
  /**
   * Register middleware on the controller.
   *
   * @param array|string|\Closure $middleware
   * @param array  $options
   * @return \Illuminate\Routing\ControllerMiddlewareOptions
   */
  public function middleware($middleware, array $options = [])
  {
  foreach ((array) $middleware as $m) {
    $this->middleware[] = [
    'middleware' => $m,
    'options' => &$options,
    ];
  }
  return new ControllerMiddlewareOptions($options);
  }
  /**
   * Get the middleware assigned to the controller.
   *
   * @return array
   */
  public function getMiddleware()
  {
  return $this->middleware;
  }
  /**
   * Execute an action on the controller.
   *
   * @param string $method
   * @param array  $parameters
   * @return \Symfony\Component\HttpFoundation\Response
   */
  public function callAction($method, $parameters)
  {
  return call_user_func_array([$this, $method], $parameters);
  }
  /**
   * Handle calls to missing methods on the controller.
   *
   * @param array  $parameters
   * @return mixed
   *
   * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
   */
  public function missingMethod($parameters = [])
  {
  throw new NotFoundHttpException('Controller method not found.');
  }
  /**
   * Handle calls to missing methods on the controller.
   *
   * @param string $method
   * @param array  $parameters
   * @return mixed
   *
   * @throws \BadMethodCallException
   */
  public function __call($method, $parameters)
  {
  throw new BadMethodCallException("Method [{$method}] does not exist.");
  }

protected $middleware = ['\App\Http\Middleware\Authenticate'=>[]];

• 3、全局注册中间件
  

'goods.*' => \App\Http\Middleware\GoodsMiddleware::class,

<?php
namespace App\Http;
use Illuminate\Foundation\Http\Kernel as HttpKernel;
class Kernel extends HttpKernel
{
  /**
   * The application's global HTTP middleware stack.
   *
   * @var array
   */
  protected $middleware = [
  \Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class,
  \App\Http\Middleware\EncryptCookies::class,
  \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
  \Illuminate\Session\Middleware\StartSession::class,
  \Illuminate\View\Middleware\ShareErrorsFromSession::class,
  \App\Http\Middleware\VerifyCsrfToken::class,
  ];
  /**
   * The application's route middleware.
   *
   * @var array
   */
  protected $routeMiddleware = [
  'auth' => \App\Http\Middleware\Authenticate::class,
  'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
  'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
  ];
}