Enable CORS via Middleware in Laravel

CORS.php

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Response;

class CORS
{

    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        $origin = request()->headers->get('origin', '*');

        $headers = [
            'Access-Control-Allow-Methods'     => 'GET, PUT, POST, DELETE, OPTIONS',
            'Access-Control-Allow-Headers'     => 'Content-Type, X-Auth-Token, Origin, Authorization, apitoken, ApiToken',
            'Access-Control-Allow-Origin'      => $origin,
            'Access-Control-Allow-Credentials' => 'true',
        ];

        if ($request->getMethod() == "OPTIONS") {
            return response('', 200)->withHeaders($headers);
        }

        $response = $next($request);
        foreach ($headers as $key => $value) {
            $response->header($key, $value);
        }
        return $response;
    }

}

protected $routeMiddleware = []
add 'cors' => \App\Http\Middleware\CORS::class,