Workerman development: How to implement a remote file management system based on TCP protocol

Workerman Development: How to implement a remote file management system based on TCP protocol

Introduction:
With the rise of cloud computing and remote work, remote file management systems It has become the demand of more and more enterprises and individuals. In this article, we will introduce how to use the Workerman framework to implement a remote file management system based on the TCP protocol, and provide specific code examples.

1. Preparation
Before we start writing code, we need to prepare some necessary tools and environment. First, make sure you have a PHP environment installed and have the rights to use Composer. Then, we need to install Workerman. Just run the following command in the terminal:

composer require workerman/workerman

2. Establish a TCP server
It is very simple to use Workerman to establish a TCP server. The following is a simple example:

<?php
require_once __DIR__.'/vendor/autoload.php';

use WorkermanWorker;

$tcp_worker = new Worker("tcp://0.0.0.0:8080");

$tcp_worker->onConnect = function ($connection) {
    echo "New client connected
";
};

$tcp_worker->onClose = function ($connection) {
    echo "Client connection closed
";
};

$tcp_worker->onMessage = function ($connection, $data) {
    echo "Received message from client: $data
";
    // 在这里解析客户端传来的命令并进行相应的文件操作
    // ...
};

Worker::runAll();

3. Processing client requests
Next, we need to process the request from the client and perform corresponding file operations. The following is a sample code for processing commands from the client, such as uploading files, downloading files, deleting files, etc.:

// ...

$tcp_worker->onMessage = function ($connection, $data) {
    echo "Received message from client: $data
";
    $command = json_decode($data, true);
    
    switch ($command['action']) {
        case 'upload':
            if (isset($command['file'])) {
                $file_content = base64_decode($command['file']);
                file_put_contents($command['path'], $file_content);
                $connection->send("File uploaded successfully
");
            } else {
                $connection->send("Invalid file format
");
            }
            break;
        
        case 'download':
            if (file_exists($command['path'])) {
                $file_content = file_get_contents($command['path']);
                $file_content_base64 = base64_encode($file_content);
                $connection->send(json_encode(['data' => $file_content_base64])."
");
            } else {
                $connection->send("File not found
");
            }
            break;
        
        case 'delete':
            if (file_exists($command['path'])) {
                unlink($command['path']);
                $connection->send("File deleted successfully
");
            } else {
                $connection->send("File not found
");
            }
            break;
            
        // 其他命令的处理代码...
    }
};

// ...

It should be noted that in the above code we assume that the data sent by the client It adopts JSON format and uses base64 to encode the file content.

4. Interacting with the client
The client can use any tool or programming language that supports the TCP protocol to interact with the remote file management system. The following is a simple Python client sample code for uploading files:

import socket
import json

address = ('127.0.0.1', 8080)
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client_socket.connect(address)

command = {
    'action': 'upload',
    'path': '/path/to/file.txt',
    'file': ''
}

with open('file.txt', 'rb') as file:
    command['file'] = file.read().decode('base64')

client_socket.send(json.dumps(command).encode())
print(client_socket.recv(1024).decode())
client_socket.close()

5. Summary
By using the Workerman framework, we can easily implement a remote file management system based on the TCP protocol. This article provides a simple sample code and discusses methods of handling client requests and interacting with clients. I hope readers can learn how to use Workerman to develop such systems through this article, and get inspiration and help from it. In practical applications, it can also be expanded and improved according to specific needs.

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