How to use middleware for Alipay payment integration in Laravel

How to use middleware for Alipay payment integration in Laravel

Introduction:
With the rapid development of e-commerce, there are more and more online payment methods Be widely adopted. As one of the commonly used payment methods, Alipay payment has a wide user base and stable payment system in China. This article will introduce how to use middleware in the Laravel framework to integrate Alipay payment to provide convenience for developers.

1. Early preparation

1. Create an application in the Alipay Developer Center and obtain the relevant secret key.
2. Make sure the Laravel project has Composer installed and configured.

2. Install related dependencies
Install Alipay SDK through Composer.

composer require alipay/alipay-sdk-php

3. Create middleware

1. Execute the following command to create a middleware named AlipayMiddleware.

   php artisan make:middleware AlipayMiddleware

2. Open the generated AlipayMiddleware.php file and write the middleware code as follows:

   <?php
   
   namespace AppHttpMiddleware;
   
   use Closure;
   use AlipayAopClient;
   use IlluminateHttpRequest;
   
   class AlipayMiddleware
   {
    protected $alipay;
   
    public function __construct()
    {
        // 实例化AopClient类
        $this->alipay = new AopClient();
        $this->alipay->appId = config('alipay.app_id');
        $this->alipay->gatewayUrl = 'https://openapi.alipay.com/gateway.do';
        $this->alipay->rsaPrivateKey = config('alipay.private_key');
        $this->alipay->alipayPublicKey = config('alipay.public_key');
        $this->alipay->format = 'json';
        $this->alipay->charset = 'UTF-8';
        $this->alipay->signType = 'RSA2';
    }
   
    public function handle(Request $request, Closure $next)
    {
        // TODO: 在此处编写校验支付宝支付的逻辑
   
        return $next($request);
    }
   }

3. In the app/Http/Kernel.php file Add the following code to the $routeMiddleware array:

   'ali.pay' => AppHttpMiddlewareAlipayMiddleware::class,

4. Develop routes and controllers

1. Add the following to the routes/web.php file Code:

   Route::post('/pay', [AppHttpControllersPayController::class, 'pay'])->middleware('ali.pay');
   Route::post('/callback', [AppHttpControllersPayController::class, 'callback']);

2. Create PayController:

   php artisan make:controller PayController

3. Open the generated PayController.php file and write the code for the pay and callback methods as follows:

   <?php
   
   namespace AppHttpControllers;
   
   use AlipayAopClient;
   use IlluminateHttpRequest;
   
   class PayController extends Controller
   {
    public function pay(Request $request, AopClient $alipay)
    {
        // TODO: 在此处编写支付逻辑，调用支付宝支付接口
   
        // 获取返回结果并返回
        return $alipay->pageExecute();
    }
   
    public function callback(Request $request)
    {
        // TODO: 在此处编写支付回调的逻辑
   
        // 返回支付结果
        return 'success';
    }
   }
   

5. Configuration file

1. Open the config/app.php file, find the providers array and add the following code:

   AlipayAlipayServiceProvider::class,

2. Open the config/app.php file, find the aliases array and add the following code:

   'Alipay' => AlipayFacadeAlipay::class,

3. Create the config/alipay.php file in the project root directory and add the following Code:

   <?php
   
   return [
    'app_id' => env('ALIPAY_APP_ID'),
    'private_key' => env('ALIPAY_PRIVATE_KEY'),
    'public_key' => env('ALIPAY_PUBLIC_KEY'),
   ];

6. Configure environment variables
Add the following code to the .env file in the root directory:

ALIPAY_APP_ID=xxxx
ALIPAY_PRIVATE_KEY=xxxx
ALIPAY_PUBLIC_KEY=xxxx

Replace xxxx with your Alipay related Secret key.

7. Use middleware for Alipay payment integration

1. Complete the logic of parameter verification and signature verification for Alipay payment in the handle method of AlipayMiddleware.
2. In the pay method of PayController, call the Alipay payment interface.
3. In the callback method of PayController, handle the payment callback.

8. Summary
This article introduces how to use middleware for Alipay payment integration in Laravel. By installing dependencies, creating middleware, developing routes and controllers, and configuring them, we finally achieved the integration of Alipay payment in the project. Developers can write corresponding business logic in middleware and controllers according to their own needs to achieve more personalized Alipay payment functions.

(Note: The above code is only an example, the specific implementation can be adjusted according to business needs)

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