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Detailed explanation of cross-domain solutions in laravel development
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 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
<?php
namespace App\Http\Middleware;
use Closure;
class EnableCrossRequestMiddleware
{
/**
* Handle an incoming request.
*
* @param \Illuminate\Http\Request $request
* @param \Closure $next
* @return mixed
*/
public function handle($request, Closure $next)
{
$response = $next($request);
$origin = $request->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 ArrayThe 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!
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