ThinkPHP6 cross-domain request processing: solving the problem of front-end and back-end separation

ThinkPHP6 cross-domain request processing: solving the problem of front-end and back-end separation

With the continuous development of Internet applications, the development model of front-end and back-end separation is becoming more and more common. When using the ThinkPHP6 framework to develop applications that separate front and back ends, cross-domain requests have become a common problem. This article will introduce how to handle cross-domain requests in ThinkPHP6 and provide corresponding code examples.

1. What is a cross-domain request?

Cross-domain request refers to a web application in which the front-end code sends requests to the back-end of different domain names or ports through Ajax and other methods. Due to the browser's same-origin policy restrictions, if the requested URL is different from the domain name, protocol, or port of the current page, the browser will block the request.

2. Methods to solve cross-domain requests

1. Set HTTP response header

In ThinkPHP6, you can set the response header in the controller. Solve the problem of cross-domain requests. In the controller method that needs to support cross-domain requests, you can set the response header by using the following code:

<?php
namespace appcontroller;

use thinkacadeRequest;

class Index
{
    public function index()
    {
        $allowOrigin = Request::header('origin');
        $allowHeaders = 'X-Requested-With, Content-Type, Authorization';
        $allowMethods = 'GET, POST, PUT, DELETE, PATCH, OPTIONS';

        header("Access-Control-Allow-Origin: ".$allowOrigin);
        header("Access-Control-Allow-Headers: ".$allowHeaders);
        header("Access-Control-Allow-Methods: ".$allowMethods);
    }
}

In the above code, by getting the origin header information of the request, set it to Access-Control- Allow-Origin response header. At the same time, you can also set the Access-Control-Allow-Headers and Access-Control-Allow-Methods headers to support other custom request headers and request methods.

2. Use middleware to handle cross-domain requests

In addition to setting response headers in the controller, you can also use middleware to handle cross-domain requests. In ThinkPHP6, creating a cross-domain middleware is very simple. You only need to create the Cors.php file in the app/middleware directory and write the corresponding code in it.

<?php
namespace appmiddleware;

class Cors
{
    public function handle($request, Closure $next)
    {
        $allowOrigin = $request->header('origin');
        $allowHeaders = 'X-Requested-With, Content-Type, Authorization';
        $allowMethods = 'GET, POST, PUT, DELETE, PATCH, OPTIONS';

        header("Access-Control-Allow-Origin: ".$allowOrigin);
        header("Access-Control-Allow-Headers: ".$allowHeaders);
        header("Access-Control-Allow-Methods: ".$allowMethods);

        return $next($request);
    }
}

Next, register the middleware in the app/middleware.php file:

<?php
// 其他中间件...
ppmiddlewareCors::class,

After the registration is completed, the middleware will be processed before all requests and automatically add response headers to support cross-domain requests.

3. Verify cross-domain request processing

In order to verify that cross-domain request processing has taken effect, you can use the browser's developer tools to view the response header of the request. Open your browser's developer tools (usually by pressing the F12 key), select the Network tab, and make a test request. You should be able to see header information such as Access-Control-Allow-Origin, Access-Control-Allow-Headers, and Access-Control-Allow-Methods in the response header.

4. Summary

This article introduces how to handle cross-domain requests in ThinkPHP6. By setting HTTP response headers or using middleware, you can easily solve the problem of cross-domain requests in front-end and back-end separation applications. In actual development, choose the appropriate method according to needs, and perform corresponding configuration and flexible processing according to specific scenarios.

I hope this article will be helpful to you in handling cross-domain requests when using the ThinkPHP6 framework to develop front-end and back-end separation applications. If you have any questions or suggestions, please leave a message for discussion.

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