How to solve cross-domain problems in laravel development

Recently, I encountered cross-domain needs during development, and found relevant solutions by searching for relevant information. Therefore, the following article mainly introduces to you the cross-domain solutions in laravel development. The article uses sample code The introduction is very detailed. Friends who need it can refer to it. Let’s take a look together.

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 your 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. of. In fact, this problem is easy to solve, just add a middleware. 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_origin array variable is the list of cross-domain you allow and can be modified by yourself.

3. Then register the middleware in the kernel file

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

$ in the App\Http\Kernel class The middleware attribute is added. 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.

The above is the entire content of this article. I hope it will be helpful to everyone's study. For more related content, please pay attention to the PHP Chinese website!

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