{
 "name": "socketiochatroom",
 "version": "0.0.1",
 "dependencies": {
 "socket.io": "*",
 "express":"*"
 }
}

/**
 * Created by bamboo on 2016/3/31.
 */
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/', function (req, res) {
 "use strict";
 res.end("
socket server
")
});
/*在线人员*/
var onLineUsers = {};
/* 在线人数*/
var onLineCounts = 0;
/*io监听到存在链接，此时回调一个socket进行socket监听*/
io.on('connection', function (socket) {
 console.log('a user connected');
 /*监听新用户加入*/
 socket.on('login', function (user) {
  "use strict";
  //暂存socket.name 为user.userId;在用户退出时候将会用到
  socket.name = user.userId;
  /*不存在则加入 */
  if (!onLineUsers.hasOwnProperty(user.userId)) {
   //不存在则加入
   onLineUsers[user.userId] = user.userName;
   onLineCounts++;
  }
  /*一个用户新加入，向所有客户端监听login的socket的实例发送响应，响应内容为一个对象*/
  io.emit('login', {onLineUsers: onLineUsers, onLineCounts: onLineCounts, user: user});
  console.log(user.userName, "加入了聊天室");//在服务器控制台中打印么么么用户加入到了聊天室
 });
 /*监听用户退出聊天室*/
 socket.on('disconnect', function () {
  "use strict";
  if (onLineUsers.hasOwnProperty(socket.name)) {
   var user = {userId: socket.name, userName: onLineUsers[socket.name]};
   delete onLineUsers[socket.name];
   onLineCounts--;
   /*向所有客户端广播该用户退出群聊*/
   io.emit('logout', {onLineUsers: onLineUsers, onLineCounts: onLineCounts, user: user});
   console.log(user.userName, "退出群聊");
  }
 })
 /*监听到用户发送了消息，就使用io广播信息，信息被所有客户端接收并显示。注意，如果客户端自己发送的也会接收到这个消息，故在客户端应当存在这的判断，是否收到的消息是自己发送的，故在emit时，应该将用户的id和信息封装成一个对象进行广播*/
 socket.on('message', function (obj) {
  "use strict";
  /*监听到有用户发消息，将该消息广播给所有客户端*/
  io.emit('message', obj);
  console.log(obj.userName, "说了:", obj.content);
 });
});
/*监听3000*/
http.listen(3000, function () {
 "use strict";
 console.log('listening 3000');
});

node index.js

listening 3000

app.get('/', function (req, res) {
 "use strict";
 res.end("
socket server
")
});

 
 
 
 
 
 
 



 

  输入你在群聊中的昵称
  

  

  
  
 


 

  

   1301群聊
   |
   退出
  
 
 

  

   

    

    
   
   

    

     
    
    

     提交
    
   
  
 

/**
 * Created by bamboo on 2016/3/31.
 */
 /*即时运行函数*/
(function () {
 "use strict";
 var d = document,
  w = window,
  dd = d.documentElement,
  db = d.body,
  dc = d.compatMode === "CSS1Compat",
  dx = dc ? dd : db,
  ec = encodeURIComponent,
  p = parseInt;
 w.CHAT = {
  msgObj: d.getElementById("message"),
  screenHeight: w.innerHeight ? w.innerHeight : dx.innerHeight,
  userName: null,
  userId: null,
  socket: null,
  /*滚动条始终在最底部*/
  scrollToBottom: function () {
   w.scrollTo(0, this.msgObj.clientHeight);
  },
  /*此处仅为简单的刷新页面，当然可以做复杂点*/
  logout: function () {
   // this.socket.disconnect();
   w.top.location.reload();
  },
  submit: function () {
   var content = d.getElementById('content').value;
   if (content != '') {
    var obj = {
     userId: this.userId,
     userName: this.userName,
     content: content
    };
    //如在服务器端代码所说，此对象就行想要发送的信息和发送人组合成为对象一起发送。
    this.socket.emit('message', obj);
    d.getElementById('content').value = '';
   }
   return false;
  },
  /**客户端根据时间和随机数生成ID，聊天用户名称可以重复*/
  genUid: function () {
   return new Date().getTime() + "" + Math.floor(Math.random() * 889 + 100);
  },
  /*更新系统信息
  主要是在客户端显示当前在线人数，在线人列表等，当有新用户加入或者旧用户退出群聊的时候做出页面提示。*/
  updateSysMsg: function (o, action) {
   var onLineUsers = o.onLineUsers;
   var onLineCounts = o.onLineCounts;
   var user = o.user;
   //更新在线人数
   var userHtml = '';
   var separator = '';
   for (var key in onLineUsers) {
    if (onLineUsers.hasOwnProperty(key)) {
     userHtml += separator + onLineUsers[key];
     separator = '、';
    }
   }
   //插入在线人数和在线列表
   d.getElementById('onLineCounts').innerHTML = '当前共有' + onLineCounts + "在线列表： " + userHtml;
   //添加系统消息
   var html = '';
   html += '
';
   html += user.userName;
   html += (action === "login") ? "加入了群聊" : "退出了群聊";
   html += '
';
   var section = d.createElement('section');
   section.className = 'system J-mjrlinkWrap J-cutMsg';
   section.innerHTML = html;
   this.msgObj.appendChild(section);
   this.scrollToBottom();
  },
  /*用户提交用户名后，将loginbox设置为不显示，将chatbox设置为显示*/
  userNameSubmit: function () {
   var userName = d.getElementById('userName').value;
   if (userName != '') {
    d.getElementById('userName').value = '';
    d.getElementById('loginbox').style.display = 'none';
    d.getElementById('chatbox').style.display = 'block';
    this.init(userName);//调用init方法
   }
   return false;
  },
  //用户初始化
  init: function (userName) {
   //随机数生成uid
   this.userId = this.genUid();
   this.userName = userName;
   d.getElementById('showUserName').innerHTML = this.userName;//[newpidian]|[退出]
   this.scrollToBottom();
   //连接socketIO服务器,newpidian的IP地址
   this.socket = io.connect('192.168.3.155:3000');
   //向服务器发送某用户已经登录了
   this.socket.emit('login', {userId: this.userId, userName: this.userName});
   //监听来自服务器的login，即在客户端socket.emit('login ')发送后，客户端就会收到来自服务器的
   // io.emit('login', {onLineUsers: onLineUsers, onLineCounts: onLineCounts, user: user});
   /*监听到有用户login了，更新信息*/
   this.socket.on('login', function (o) {
    //更新系统信息
    CHAT.updateSysMsg(o, 'login');
   });
   /*监听到有用户logout了，更新信息*/
   this.socket.on('logout', function (o) {
    CHAT.updateSysMsg(o, 'logout');
   });
   //var obj = {
   // userId: this.userId,
   // userName: this.userName,
   // content: content
   //};
   /*监听到有用户发送消息了*/
   this.socket.on("message", function (obj) {
    //判断消息是不是自己发送的
    var isMe = (obj.userId === CHAT.userId);
    var contentDiv = '
' + obj.content + '
';
    var userNameDiv = '' + obj.userName + '';
    var section = d.createElement('section');
    if (isMe) {
     section.className = 'user';
     section.innerHTML = contentDiv + userNameDiv;
    } else {
     section.className = 'service';
     section.innerHTML = userNameDiv + contentDiv;
    }
    CHAT.msgObj.appendChild(section);
    CHAT.scrollToBottom();
   });
  }
 }
 /*控制键键码值(keyCode)
  按键 键码 按键 键码 按键 键码 按键 键码
  BackSpace 8 Esc 27 Right Arrow 39 -_ 189
  Tab 9 Spacebar 32 Dw Arrow 40 .> 190
  Clear 12 Page Up 33 Insert 45 /? 191
  Enter 13 Page Down 34 Delete 46 `~ 192
  Shift 16 End 35 Num Lock 144 [{ 219
  Control 17 Home 36 ;: 186 \| 220
  Alt 18 Left Arrow 37 =+ 187 ]} 221
  Cape Lock 20 Up Arrow 38 ,< 188 '" 222
  * */
 //通过“回车键”提交用户名
 d.getElementById('userName').onkeydown = function (e) {
  console.log(e);
  e = e || event;
  if (e.keyCode === 13) {
   CHAT.userNameSubmit();
  }
 };
 //通过“回车键”提交聊天内容
 d.getElementById('content').onkeydown = function (e) {
  e = e || event;
  if (e.keyCode === 13) {
   CHAT.submit();
  }
 };
})();