How to use the Hyperf framework for cross-domain processing

How to use the Hyperf framework for cross-domain processing

Cross-domain means that when the browser requests resources from the server, it will follow the same-origin policy to protect the security of user data. . The same origin policy requires that the browser can only send requests to servers with the same domain name, the same port, and the same protocol. However, in some cases, our application may need to request resources from servers with different domain names, which requires cross-domain processing.

Hyperf is a high-performance PHP framework based on Swoole, designed to provide powerful scalability and development efficiency. The following will introduce how to perform cross-domain processing in the Hyperf framework and give specific code examples.

1. Modify middleware
   In Hyperf, we can handle cross-domain requests through middleware. First, we need to create a new middleware to handle cross-domain requests. Create a file named CorsMiddleware.php in the app/Middleware directory, and then write the following code in the file:

<?php

declare(strict_types=1);

namespace AppMiddleware;

use HyperfHttpMessageStreamSwooleStream;
use PsrHttpMessageResponseInterface;
use PsrHttpMessageServerRequestInterface;
use PsrHttpServerMiddlewareInterface;
use PsrHttpServerRequestHandlerInterface;

class CorsMiddleware implements MiddlewareInterface
{
    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
    {
        $response = $handler->handle($request);
        // 设置允许跨域的域名，* 表示允许任意域名跨域
        $response = $response->withHeader('Access-Control-Allow-Origin', '*');
        // 设置允许的请求方法
        $response = $response->withHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
        // 设置允许的请求头
        $response = $response->withHeader('Access-Control-Allow-Headers', 'Content-Type,Authorization');
        // 设置是否允许带认证信息（例如cookie）的请求
        $response = $response->withHeader('Access-Control-Allow-Credentials', 'true');
        // 设置预检请求的缓存时间（秒）
        $response = $response->withHeader('Access-Control-Max-Age', '3600');
        return $response;
    }
}

2. Register Middleware
   To make the middleware effective, We need to register it in the global middleware list. Open the config/autoload/middlewares.php file, find the $middlewares array, and add CorsMiddleware::class to the beginning of the array:

<?php

declare(strict_types=1);

return [
    'http' => [
        AppMiddlewareCorsMiddleware::class,
        // 其他中间件...
    ],
];

3. Configuring routing
   Finally, we need to configure routing Add processing of OPTIONS requests. Open the config/routes.php file and add the following code to the route definition:

<?php

use HyperfHttpServerRouterRouter;

Router::addRoute(['OPTIONS'], '/{path:.+}', function () {
    return '';
});

This code will intercept all OPTIONS requests and return an empty response.

So far, we have completed the cross-domain processing in the Hyperf framework. Now, our application can receive requests from any domain name and return the appropriate data.

Summary:
Through the above steps, we understand how to perform cross-domain processing in the Hyperf framework. First, we created a middleware to set the relevant request header information that allows cross-domain requests. Then, we registered the middleware into the global middleware list and configured the processing of OPTIONS requests. In this way, our application can make cross-domain requests smoothly.

Code examples have been given, and you can modify and expand them according to your actual needs. The high performance and flexibility of the Hyperf framework allow us to easily develop various functions, including cross-domain processing. Hope this article is helpful to everyone.

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