被CORS阻止：'Access-Control-Allow-Origin‘标头包含多个值'*，*'，Laravel8

// app/Http/Kernel.php
protected $middleware = [
    // 其他中间件
    \Fruitcake\Cors\HandleCors::class,
];

return [
    'paths' => ['api/*'],
    'allowed_methods' => ['*'],
    'allowed_origins' => ['*'],
    'allowed_origins_patterns' => [],
    'allowed_headers' => ['*'],
    'exposed_headers' => [],
    'max_age' => 0,
    'supports_credentials' => false,
];

// app/Http/Middleware/CustomCorsMiddleware.php
namespace App\Http\Middleware;

use Closure;

class CustomCorsMiddleware
{
    public function handle($request, Closure $next)
    {
        $response = $next($request);
        $response->header('Access-Control-Allow-Origin', '*');
        $response->header('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
        $response->header('Access-Control-Allow-Headers', 'Content-Type, Authorization');

        return $response;
    }
}

protected $routeMiddleware = [
    // 其他中间件
    'cors' => \App\Http\Middleware\CustomCorsMiddleware::class,
];

Route::middleware('cors')->group(function () {
    Route::get('/data', [DataController::class, 'index']);
});