laravel自定义中间件解决跨域问题

使用 make:middleware这个 Artisan 命令创建中间件：

php artisan make:middleware CrossHttp

中间件App\Http\Middleware\CrossHttp代码如下：

<?php

namespace App\Http\Middleware;

use Closure;

class CrossHttp
{
/**
* Handle an incoming request.
*
* @param \Illuminate\Http\Request $request
* @param \Closure $next
* @return mixed
*/
public function handle($request, Closure $next) {
$response = $next($request);
$response->header('Access-Control-Allow-Origin', '*'); //允许所有资源跨域
$response->header('Access-Control-Allow-Headers', 'Origin, Content-Type, Cookie, Accept, Authorization, application/json , X-Auth-Token');//允许通过的响应报头
$response->header('Access-Control-Allow-Methods', 'GET, POST, PATCH, PUT, OPTIONS, DELETE');//允许的请求方法
$response->header('Access-Control-Expose-Headers', 'Authorization');//允许axios获取响应头中的Authorization
$response->header('Allow', 'GET, POST, PATCH, PUT, OPTIONS, delete');//允许的请求方法
$response->header('Access-Control-Allow-Credentials', 'true');//运行客户端携带证书式访问
return $response;
}
}

 

注册路由，设置中间件保护接口

分别在 protected $middleware 数组中和 protected $routeMiddleware 数组中添加我们刚才创建的那个文件class名, 使用 cors 这个别名。然后在设置它保护 api , 文件地址：\App\Http\Kernel.php

代码如下：

protected $middlewareGroups = [
'api' => [
'cors',
],
];
protected $routeMiddleware = [
'cors' => \App\Http\Middleware\CrossHttp::class,
];