我最近尝试在 Laravel 5.4 中启用 CORS，但不幸的是它不想工作。我在下面包含了代码和它给我的错误。谁能帮忙找出为什么它不起作用？我已经传递了所需的 header 。

出于示例目的，我已将我的域重命名为 domain.uk，并且我不想公开我的站点的域，因为它正在开发中。

路由(在开发时为了测试目的制作了一条路由::any，通常在生产中它会被发布):

Route::group(['domain' => 'api.domain.uk', 'namespace' => 'Api'], function() {
    Route::group(['middleware' => ['cors'], 'prefix' => 'call'], function() {
        Route::get('/rooms/{id}/get-locked-status', 'ApiController@getRoomLockStatus');
        Route::any('/rooms/{id}/update-locked-status', 'ApiController@updateRoomLockStatus');
    });
});

错误:

XMLHttpRequest cannot load http://api.domain.uk/ajax/rooms/1/update-locked-status. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://ice.domain.uk' is therefore not allowed access. The response had HTTP status code 500.

中间件:

namespace App\Http\Middleware;

use Closure;

class Cors
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        return $next($request)
            ->header('Access-Control-Allow-Origin', '*')
            ->header('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS')
            ->header('Access-Control-Allow-Headers', 'Content-Type, Accept, Authorization, X-Requested-With, Application');
    }
}

Ajax :

function toggleDoors(roomId) {
    $.ajax({
        url: 'http://api.domain.uk/ajax/rooms/' + roomId + '/update-locked-status',
        type: "POST",
        success: function(data) {
            alert(data);
        }
    });
}

API Controller :

<?php
namespace App\Http\Controllers\Api;

use Auth;
use App\User;
use App\Http\Controllers\Controller;
use Validator;
use Redirect;
use Illuminate\Http\Request;
use App\Database\Frontend\Other\Rooms;

class ApiController extends Controller
{
    public function getRoomLockStatus($id) {
        $room = Rooms::find($id);

        if ($room == null) {
            return response('bad request', 400);
        } 
        else {
            return $room->rp_locked;
        }
    }

    public function updateRoomLockStatus(Request $request, $id) {
        $room = Rooms::find($id);

        if ($room == null) {
            return response('bad request', 400);
        } 

        $room->rp_locked = $room->rp_locked == '1' ? '0' : '1';
        $room->save();

        $responseText = $room->rp_locked == '1' ?
            'Your doors have been locked.' : 'Your doors have been unlocked.';

        return response($responseText, 200);
    }
}

最佳答案

参见 https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/OPTIONS#Preflighted_requests_in_CORS

如果您在 OPTIONS 方法中遇到问题。

Kernel::$routeMiddleware 在 Laravel 5.4 中无法使用请求方法选项，请参阅 https://github.com/laravel/framework/blob/v5.4.0/src/Illuminate/Routing/RouteCollection.php#L214 . 要使用 CORS 中间件，请在 Kernel::$middleware 数组中启用它。这不好，但别无他法。

例如，我将 next 中间件类用于 SPA 和 API，注意，它不是用于路由的中间件“cors”

<?php
namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Illuminate\Http\Response;

/**
 * OptionsCorsResponse middleware - add CORS headers if request method OPTIONS
 */
class OptionsCorsResponse
{
    /**
     *
     * @param Request $request
     * @param Closure $next
     * @return Response
     */
    public function handle($request, Closure $next)
    {
        /* @var $response Response */
        $response = $next($request);
        if (!$request->isMethod('OPTIONS')) {
            return $response;
        }
        $allow = $response->headers->get('Allow'); // true list of allowed methods
        if (!$allow) {
            return $response;
        }
        $headers = [
            'Access-Control-Allow-Methods' => $allow,
            'Access-Control-Max-Age' => 3600,
            'Access-Control-Allow-Headers' => 'X-Requested-With, Origin, X-Csrftoken, Content-Type, Accept',
        ];
        return $response->withHeaders($headers);
    }
}

并在App\Http\Kernel中开启

protected $middleware = [
    // ...
    \App\Http\Middleware\OptionsCorsResponse::class,
];

Origin 'http :// ice . domain . uk' is therefore not allowed access. The response had HTTP status code 500.

调试你的代码，因为它会产生一些异常。使用带有 OPTIONS 方法的任何 REST 客户端。

关于php - Laravel Cors(中间件不工作)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43411261/