Cross-origin resource sharing (CORS) Middleware for Lumen micro-framework.

After you install lumen as per lumen docs, install lumen-cors from lumen folder.

Run composer require "palanik/lumen-cors:dev-master" to install lumen-cors.

Copy the file LumenCors.php into app/Http/Middleware directory.

If you want CORS enabled for every HTTP request to your application, simply list the middleware class palanik\lumen\Middleware\LumenCors in the $app->middleware() call of your bootstrap/app.php file.

If you would like to enable CORS to specific routes, you should first assign the lumen-cors middleware a short-hand key in your bootstrap/app.php file.

$app->routeMiddleware([
    'cors' => 'palanik\lumen\Middleware\LumenCors',
]);

Then, you use the key in the route options array.

$app->get('/data', ['middleware' => 'cors', function() {
    //
}]);

More info. - http://lumen.laravel.com/docs/middleware#registering-middleware

MIT