PHP development: How to use Swoft to implement TCP server

In network programming, TCP is an important protocol. In PHP, implementing the TCP server can not only improve the efficiency of network programming, but also learn from this model to implement some network applications. This article will introduce how to use the Swoft framework to quickly implement a TCP server.

Swoft Framework Introduction

Swoft is a PHP high-performance coroutine network framework based on the Swoole extension. It implements coroutines similar to the Go language, greatly improving the performance of PHP network programming. and efficiency.

Swoft has the following characteristics:

• High performance: using coroutine technology to achieve high concurrent network applications
• High flexibility: the framework itself provides many components and supports Composer library
• High reliability: Enhanced application robustness through exception handling and custom error codes
• High maintainability: Good comments and complete documentation make development and maintenance easy Simple
• Highly componentized: loose coupling between components through AOP

Implementing TCP server

Step 1: Prepare tools

Before using the Swoft framework to implement the TCP server, you need to install the following tools:

• PHP 7.1 or above
• Swoft framework
• Swoole extension

Step 2: Create the project

First, use the Composer tool to create a Swoft project:

composer create-project swoft/swoft swoft-project

Step 3: Create the controller

In the ## of the project Create a TcpController.php file in the #app/Controller directory with the following content:

namespace AppController;

use SwoftHttpMessageRequest;
use SwoftHttpMessageResponse;
use SwoftTcpServerAnnotationMappingTcpController;
use SwoftTcpServerAnnotationMappingTcpMapping;

/**
 * @TcpController()
 */
class TcpController
{
    /**
     * @TcpMapping("echo")
     */
    public function echo(Request $request)
    {
        $params = $request->getParams();
        return $params['msg'] . "
";
    }
}

In the controller, we define an

echo method, This method accepts the data sent by the client and returns the same message.

Step 4: Create a TCP server

Create a

TcpServer.php file in the app/Server directory of the project, which is Start the entrance of the TCP server, the content is as follows:

namespace AppServer;

use SwoftBeanAnnotationMappingBean;
use SwoftLogHelperCLog;
use SwoftTcpServerAnnotationMappingTcpServer;
use SwoftTcpServerRequest;

/**
 * @Bean()
 * @TcpServer(port=9999)
 */
class TcpServer
{
    public function onReceive(Request $request)
    {
        $params = $request->getParams();
        $msg = $params['data'];
        CLog::info('receive data:%s', $msg);
        $response = "received:" . $msg;
        return $response;
    }
}

In

TcpServer, we specify the port through the @TcpServer annotation, and implement the onReceive method Accept the data sent by the client. In this method, we can forward the request to the specified controller to complete the business logic.

Step 5: Run the program

Execute the following command in the command line to start the TCP server:

php bin/swoft tcp:start

In another terminal, use telnet to connect to the TCP server Test:

telnet localhost 9999
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
{"method":"echo","params":{"msg":"hello, swoft!"}}
hello, swoft!
Connection closed by foreign host.

The client sends a piece of data in JSON format to the server. The server parses the data and calls the

echo method to return the same data. The client prints the received data. data and exit the connection.

Summary

Through the Swoft framework, we can easily implement the TCP server, which greatly improves the efficiency of network programming. In actual applications, we can adjust and expand this sample program according to business needs to implement richer network applications.

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