如何使用Socket从Node Server中检索数据？

// 服务器端代码
const net = require('net');

const server = net.createServer((socket) => {
  console.log('Client connected.');

  socket.on('data', (data) => {
    console.log('Received data:', data.toString());

    // 查询数据库或其他数据源，获取所需数据
    const retrievedData = fetchDataFromDatabase();

    // 将数据发送给客户端
    socket.write(retrievedData);
  });

  socket.on('end', () => {
    console.log('Client disconnected.');
  });
});

server.listen(3000, () => {
  console.log('Server listening on port 3000.');
});

// 客户端代码
const net = require('net');

const client = net.connect({ port: 3000 }, () => {
  console.log('Connected to server.');

  // 发送数据给服务器
  client.write('Hello server!');
});

client.on('data', (data) => {
  console.log('Received data from server:', data.toString());

  // 在这里处理从服务器接收到的数据
});

client.on('end', () => {
  console.log('Disconnected from server.');
});