Detailed explanation of cross-domain solutions in laravel development

Preface

As we all know, when we use laravel for development, especially when the front-end and back-end are completely separated, since the front-end project runs on the designated port of our own machine ( It may also be someone else's machine), such as localhost:8000, and the laravel program runs on another port, so it is cross-domain. However, due to the browser's same-origin policy, cross-domain requests are illegal. In fact, this problem is easy to solve, just add amiddleware. Not much to say below, let’s follow the editor to see the detailed solutions.

Solution:

1. Create a new middleware

php artisan make:middleware EnableCrossRequestMiddleware

2. Write the middleware content

server('HTTP_ORIGIN') ? $request->server('HTTP_ORIGIN') : ''; $allow_origin = [ 'http://localhost:8000', ]; if (in_array($origin, $allow_origin)) { $response->header('Access-Control-Allow-Origin', $origin); $response->header('Access-Control-Allow-Headers', 'Origin, Content-Type, Cookie, X-CSRF-TOKEN, Accept, Authorization, X-XSRF-TOKEN'); $response->header('Access-Control-Expose-Headers', 'Authorization, authenticated'); $response->header('Access-Control-Allow-Methods', 'GET, POST, PATCH, PUT, OPTIONS'); $response->header('Access-Control-Allow-Credentials', 'true'); } return $response; } }

$allow_originArrayThe variable is your allowed cross-domain list and can be modified by yourself.

3. Then register the middleware in the kernel file

protected $middleware = [ // more App\Http\Middleware\EnableCrossRequestMiddleware::class, ];

Add it to the $middleware attribute of the App\Http\Kernel class. The middleware registered here belongs to the global middleware.
Then you will find that the front-end page can already send cross-domain requests.

It is normal that there will be one more request with method set to options, because the browser must first determine whether the server allows the cross-domain request.

Summarize

The above is the detailed content of Detailed explanation of cross-domain solutions in laravel development. For more information, please follow other related articles on the PHP Chinese website!