How to use the Hyperf framework for cross-domain request processing

How to use the Hyperf framework for cross-domain request processing

Introduction:
In modern network application development, cross-domain requests have become a common requirement. In order to ensure the separation of front-end and back-end development and improve user experience, it has become particularly important to use the Hyperf framework for cross-domain request processing. This article will introduce how to use the Hyperf framework for cross-domain request processing and provide specific code examples.

1. What is a cross-domain request?
Cross-domain request refers to an HTTP request sent by JavaScript running on the browser through XMLHttpRequest or Fetch API. The target address of the request is the same as the domain name of the current page. , protocol or port are inconsistent. Due to the browser's security mechanism, these cross-domain requests are prohibited by default and require special handling.

2. Why cross-domain request processing is needed
Separate development of front-end and back-end has become a trend. The front-end is usually deployed under an independent domain name, while the back-end is deployed under another domain name. In this case, the front-end cannot directly access the back-end interface without cross-domain request processing. In order to ensure data security and improve user experience, cross-domain request processing has become very important.

3. Use Hyperf framework for cross-domain request processing
Hyperf framework is a high-performance framework developed based on Swoole extension. It provides rich cross-domain request processing functions. The following are the steps to use the Hyperf framework for cross-domain request processing:

1. Install the hyperf/cors component:
   Execute the following command in the project root directory to install the hyperf/cors component:
   composer require hyperf/cors

2. Configure cross-domain request parameters:
   Create the cors.php file in the config/autoload directory of the project and add the following code:

   <?php
   return [
    'paths' => ['*'],
    'allow_credentials' => false,
    'allow_origin' => ['*'],
    'allow_methods' => ['GET', 'POST', 'PUT', 'DELETE'],
    'allow_headers' => ['content-type', 'authorization'],
    'expose_headers' => [],
    'max_age' => 0,
   ];

3. Register middleware:
   Register CorsMiddleware middleware in the middlewares.php file in the config/autoload directory of the project, add the following code:

   return [
    'http' => [
        HyperfCorsMiddlewareCorsMiddleware::class,
    ],
   ];

4. Configure routing:
   In the route that needs to process cross-domain requests, add cors middleware. The example is as follows:

   Router::group([
    'middleware' => [
        HyperfCorsMiddlewareCorsMiddleware::class,
    ],
   ], function () {
    Router::get('/api/user', 'AppControllerUserController@index');
   });

4. Cross-domain request processing sample code
The following is an example using Hyperf Sample code for cross-domain request processing by the framework:

<?php

declare(strict_types=1);

namespace AppController;

use HyperfHttpServerAnnotationRequestMapping;
use HyperfHttpServerAnnotationController;
use HyperfHttpServerContractRequestInterface;
use HyperfHttpServerContractResponseInterface;

/**
 * @Controller(prefix="/api")
 */
class UserController
{
    /**
     * @RequestMapping(path="/user", methods="get,post")
     */
    public function index(RequestInterface $request, ResponseInterface $response)
    {
        // TODO: 处理跨域请求逻辑
        $data = ['name' => 'John Doe', 'email' => 'john@example.com'];
        return $response->json($data);
    }
}

In the above sample code, we created a UserController and defined an index method to handle cross-domain requests. In the index method, we return a response in JSON format to simulate the actual processing logic.

Conclusion:
Cross-domain request processing is an indispensable part of modern network application development. Using the Hyperf framework to handle cross-domain requests is simple and efficient, and can be completed in just a few steps. In actual projects, we can configure and expand according to specific needs. I hope the content of this article will be helpful to you, and I wish you good luck when using the Hyperf framework to handle cross-domain requests!

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