关于laravel设置跨域

红太狼 2022-05-31 14:07 666阅读 0赞

一般在在mvvm的开发模式下，都是向后端请求接口，在没有打包放到同域下，而是在开发的环境下，像vue-cli都是开一个端口服务，因此在开发环境下，后端都要设置允许跨域(cros)  
如何使用laravel做后端时，设置允许跨域呢？  
1.写一个中间件，返回一个响应头  
AllowAcross.php

<?php
    namespace App\Http\Middleware;
    use Closure;
    //laravel的中间件
    //就是说在仿问一个路由时要经过此代码进行处理
    class AllowAcross { 
        /** * Run the request filter. * * @param \Illuminate\Http\Request $request * @param \Closure $next * @return mixed */
        public function handle($request,Closure $next) { 
             header("Access-Control-Allow-Origin: *");
    
            $headers = [
                'Access-Control-Allow-Methods'=> 'POST, GET, OPTIONS, PUT, DELETE',
                'Access-Control-Allow-Headers'=> 'Content-Type, X-Auth-Token, Origin'
            ];
    
            $response = $next($request);
            foreach($headers as $key => $value) 
                $response->header($key, $value);
            return $response;
        }
    
    }

2.在kernel.php中注册

<?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,
            //在这里
            \App\Http\Middleware\AllowAcross::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,
    
            //自定义非全局中间件
    
            //用来判段是否登录
    
            'check' => \App\Http\Middleware\CheckLogin::class,
            'AdminCheck' => \App\Http\Middleware\CheckAdminLogin::class
    
        ];
    
    }