RPC service based on ThinkPHP6 and Swoole to implement asynchronous task processing

Realize asynchronous task processing based on RPC service of ThinkPHP6 and Swoole

Introduction:
With the rapid development of the Internet, asynchronous task processing has become more and more important in Web development. more and more important. For example, when a user submits a form and the backend needs to perform some time-consuming operations, in order to avoid the user waiting for a long time, these operations can be executed asynchronously in the background to improve the user experience. In this article, we will introduce how to use ThinkPHP6 and Swoole to implement RPC (Remote Procedure Call) service in order to handle these asynchronous tasks.

1. Introduction to RPC
RPC is a computer communication protocol that allows programs to call functions on a remote computer just like calling local functions. Through RPC, we can focus on writing business logic instead of network communication, improving development efficiency and code maintainability.

2. Preparation work
Before we start, we need to do some preparation work:

1. Install ThinkPHP6 and Swoole
   Can be installed through Composer, execute The following command:

   composer require topthink/think-swoole

2. Configure RPC
   Add the following code to the ThinkPHP6 configuration file config/swoole.php:

   <?php
   return [
       'rpc' => [
           'server' => 'http://localhost:9502',
           'timeout' => 3,
           'token' => 'your_rpc_token',
       ],
   ];

   where , 'server' is the address of the RPC service, 'timeout' is the timeout, and 'token' is the access token, which can be configured according to your own needs.

3. Start the RPC service
   Create an RPC service filerpc_server.php, with the following content:

   <?php
   require __DIR__ . '/vendor/autoload.php';
   
   use SwooleCoroutineHttpServer;
   use SwooleCoroutine;
   use SwooleHttpRequest;
   use SwooleHttpResponse;
   
   $server = new Server('0.0.0.0', 9502, false);
   
   $server->handle('/', function (Request $request, Response $response) {
       $data = $request->get;
       $response->header('Content-Type', 'application/json');
   
       // 验证访问令牌
       $token = $request->header['authorization'] ?? '';
       if ($token !== 'your_rpc_token') {
           $response->status(403);
           $response->end(json_encode(['msg' => 'Access denied']));
           return;
       }
   
       // 处理RPC请求
       $method = $data['method'] ?? null;
       $params = $data['params'] ?? [];
       if (!$method) {
           $response->status(400);
           $response->end(json_encode(['msg' => 'Bad request']));
           return;
       }
   
       // 执行业务逻辑
       $result = invoke($method, $params);
   
       // 返回结果
       $response->end(json_encode(['result' => $result]));
   });
   
   function invoke($method, $params) {
       // TODO: 实现具体的业务逻辑
   
       // 模拟耗时的任务
       Coroutine::sleep(1);
   
       // 返回结果
       return "Hello, RPC!";
   }
   
   $server->start();

   In this file, we use Swoole created an HTTP service listening on port 9502. When a request is received, the access token will be verified and the invoke function will be called based on the request parameters to execute specific business logic. In this example, we simulate a task that takes 1 second and returns a string as the result.

3. Call the RPC service
In our ThinkPHP6 project, to call the RPC service, you can create a controller and use Rpc::call in the method To initiate an RPC request. The following is a sample code:

<?php
namespace appcontroller;

use thinkacadeRpc;
use thinkacadeView;

class Index
{
    public function index()
    {
        // 调用RPC服务
        $result = Rpc::call('task', ['param1', 'param2']);
        
        // 显示结果
        return View::fetch('index', ['result' => $result]);
    }
}

In the above example, we used the Rpc::call method to call the RPC service. The first parameter is the method name, and the second parameter is the method parameter. It can be adjusted according to actual needs.

4. Summary
This article introduces how to use ThinkPHP6 and Swoole to implement RPC services to handle asynchronous tasks. By placing time-consuming tasks in the background for asynchronous execution, the user's response speed can be improved and the user experience improved. At the same time, using RPC can simplify code development and improve the maintainability and scalability of the code. Hope this article will be helpful to you.

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