Enable CORS in laravel 5.4

Enable CORS in Laravel 5.4.php

<?php
# File: app\Http\Middleware\CORS.php
# Create file with below code in above location. And at the end of the file there are other instructions also. 
# Please check. 

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: *");

        // ALLOW OPTIONS METHOD
        $headers = [
            'Access-Control-Allow-Methods' => 'POST, GET, OPTIONS, PUT, DELETE',
            'Access-Control-Allow-Headers' => 'Content-Type, X-Auth-Token, Origin, Authorization'
        ];

        if ($request->getMethod() == "OPTIONS") {
            // The client-side application can set only headers allowed in Access-Control-Allow-Headers
            return \Response::make('OK', 200, $headers);
        }

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

# File::  app\Http\Kernel.php
# Add following line in `protected $middleware` Array.
# \App\Http\Middleware\CORS::class

# And following in `protected $routeMiddleware` Array
# 'cors' => \App\Http\Middleware\CORS::class