// 创建TCP服务器
const net = require('net');
const server = net.createServer();

// 连接客户端时触发事件
server.on('connection', function(socket) {

console.log('A client connected!'); 

// 接收客户端发来的数据时触发事件 
socket.on('data', function(data) { 

    console.log('Data received from the client: ' + data);  

    // 向客户端发送数据  
    socket.write("Hello Client!");  

});  

// 关闭连接时触发事件  
socket.on('close', function() {  

    console.log('The client disconnected!');  

});                                    

});
// 监听端口，等待连接
server.listen(8000, function() {

console.log("TCP Server is running on port 8000");     

});