使用nodejs的net模块创建TCP服务器

1.?代码实现

const PORT = 18001;
const HOST = ‘127.0.0.1‘;
var net = require(‘net‘);
var clientHandler = function(socket){
  console.log(‘someon connected‘);
  socket.on(‘data‘,function dataHandler(data){
    console.log(socket.remoteAddress,socket.remotePort,‘send‘,data.toString());
    socket.write(‘server received\n‘);
  });////data 当客户端发来数据时触发
  socket.on(‘close‘,function(){
    console.log(socket.remoteAddress,soctet.remotePort,‘disconnected‘);
    //socket之后被销毁
  });
};

var app= net.createServer(clientHandler);
app.listen(PORT,HOST);
console.log(‘tcp server running on tcp:://‘,HOST,‘:‘,PORT);
//当connect事件发生时，触发回调函数

2.?使用telnet连接服务器测试

telnet localhost 18001 会触发connect事件 输入一段字 回车，便可发送 使用netstat -antp|grep 18001

3.?创建一个TCP的client

var net = require(‘net‘);
const HOST = ‘127.0.0.1‘;
const PORT = 18001;
var tcpClient = net.SOcket();
tcpClient.connect(PORT,HOST,function(){
  console.log(‘connect success.‘);
  tcpClient.write(‘this is tcp client by nodejs‘);
});
tcpClient.on(‘data‘,function(data){//监听
   console.log(‘received: ‘,data);
});

来源： https://www.madoko.net/preview/preview.html

来自为知笔记(Wiz)