nodejs简单实现TCP服务器端和客户端的聊天功能示例

本文实例讲述了nodejs简单实现TCP服务器端和客户端的聊天功能。分享给大家供大家参考，具体如下：

服务器端

var net = require('net');var server = net.createServer();//聚合所有客户端var sockets = [];//接受新的客户端连接server.on('connection', function(socket){  console.log('got a new connection');  sockets.push(socket);  //从连接中读取数据  socket.on('data', function(data){    console.log('got data:', data);    //广播数据    //每当一个已连接的用户输入数据，就将这些数据广播给其他所有已连接的用户    sockets.forEach(function(otherSocket){      if (otherSocket !== socket){        otherSocket.write(data);      }    });    //删除被关闭的连接    socket.on('close', function(){      console.log('connection closed');      var index = sockets.indexOf(socket);      sockets.splice(index, 1);    });  });});server.on('error', function(err){  console.log('Server error:', err.message);});server.on('close', function(){  console.log('Server closed');});server.listen(4000);

客户端

var net = require('net');var port = 4000;var quitting = false;var conn;var retryTimeout = 3000;  //三秒，定义三秒后重新连接var retriedTimes = 0;  //记录重新连接的次数var maxRetries = 10;  //最多重新连接十次process.stdin.resume(); //process.stdin流来接受用户的键盘输入，这个可读流初始化时处于暂停状态，调用流上的resume()方法来恢复流process.stdin.on('data', function(data){  if (data.toString().trim().toLowerCase() === 'quit'){    quitting = true;    console.log('quitting');    conn.end();    process.stdin.pause();  } else {    conn.write(data);  }});//连接时设置最多连接十次，并且开启定时器三秒后再连接(function connect() {  function reconnect() {    if (retriedTimes >= maxRetries) {      throw new Error('Max retries have been exceeded, I give up.');    }    retriedTimes +=1;    setTimeout(connect, retryTimeout);  }  conn = net.createConnection(port);  conn.on('connect', function() {    retriedTimes = 0;    console.log('connect to server');  });  conn.on('error', function(err) {    console.log('Error in connection:', err);  });  conn.on('close', function() {    if(! quitting) {      console.log('connection got closed, will try to reconnect');      reconnect();    }  });  //打印  conn.pipe(process.stdout, {end: false});})();

希望本文所述对大家nodejs程序设计有所帮助。