{
 "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
")
});
/*在線人員*/
var onLineUsers = {};
/* 在線人數(shù)*/
var onLineCounts = 0;
/*io監(jiān)聽到存在鏈接，此時回調(diào)一個socket進行socket監(jiān)聽*/
io.on('connection', function (socket) {
 console.log('a user connected');
 /*監(jiān)聽新用戶加入*/
 socket.on('login', function (user) {
  "use strict";
  //暫存socket.name 為user.userId;在用戶退出時候?qū)玫?  socket.name = user.userId;
  /*不存在則加入 */
  if (!onLineUsers.hasOwnProperty(user.userId)) {
   //不存在則加入
   onLineUsers[user.userId] = user.userName;
   onLineCounts++;
  }
  /*一個用戶新加入，向所有客戶端監(jiān)聽login的socket的實例發(fā)送響應(yīng)，響應(yīng)內(nèi)容為一個對象*/
  io.emit('login', {onLineUsers: onLineUsers, onLineCounts: onLineCounts, user: user});
  console.log(user.userName, "加入了聊天室");//在服務(wù)器控制臺中打印么么么用戶加入到了聊天室
 });
 /*監(jiān)聽用戶退出聊天室*/
 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--;
   /*向所有客戶端廣播該用戶退出群聊*/
   io.emit('logout', {onLineUsers: onLineUsers, onLineCounts: onLineCounts, user: user});
   console.log(user.userName, "退出群聊");
  }
 })
 /*監(jiān)聽到用戶發(fā)送了消息，就使用io廣播信息，信息被所有客戶端接收并顯示。注意，如果客戶端自己發(fā)送的也會接收到這個消息，故在客戶端應(yīng)當(dāng)存在這的判斷，是否收到的消息是自己發(fā)送的，故在emit時，應(yīng)該將用戶的id和信息封裝成一個對象進行廣播*/
 socket.on('message', function (obj) {
  "use strict";
  /*監(jiān)聽到有用戶發(fā)消息，將該消息廣播給所有客戶端*/
  io.emit('message', obj);
  console.log(obj.userName, "說了:", obj.content);
 });
});
/*監(jiān)聽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
")
});

 
 
 
 
 
 
 



 

  輸入你在群聊中的昵稱
  

  

  
  
 


 

  

   1301群聊
   |
   退出
  
 
 

  

   

    

    
   
   

    

     
    
    

     提交
    
   
  
 

/**
 * Created by bamboo on 2016/3/31.
 */
 /*即時運行函數(shù)*/
(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,
  /*滾動條始終在最底部*/
  scrollToBottom: function () {
   w.scrollTo(0, this.msgObj.clientHeight);
  },
  /*此處僅為簡單的刷新頁面，當(dāng)然可以做復(fù)雜點*/
  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
    };
    //如在服務(wù)器端代碼所說，此對象就行想要發(fā)送的信息和發(fā)送人組合成為對象一起發(fā)送。
    this.socket.emit('message', obj);
    d.getElementById('content').value = '';
   }
   return false;
  },
  /**客戶端根據(jù)時間和隨機數(shù)生成ID，聊天用戶名稱可以重復(fù)*/
  genUid: function () {
   return new Date().getTime() + "" + Math.floor(Math.random() * 889 + 100);
  },
  /*更新系統(tǒng)信息
  主要是在客戶端顯示當(dāng)前在線人數(shù)，在線人列表等，當(dāng)有新用戶加入或者舊用戶退出群聊的時候做出頁面提示。*/
  updateSysMsg: function (o, action) {
   var onLineUsers = o.onLineUsers;
   var onLineCounts = o.onLineCounts;
   var user = o.user;
   //更新在線人數(shù)
   var userHtml = '';
   var separator = '';
   for (var key in onLineUsers) {
    if (onLineUsers.hasOwnProperty(key)) {
     userHtml += separator + onLineUsers[key];
     separator = '、';
    }
   }
   //插入在線人數(shù)和在線列表
   d.getElementById('onLineCounts').innerHTML = '當(dāng)前共有' + onLineCounts + "在線列表： " + userHtml;
   //添加系統(tǒng)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();
  },
  /*用戶提交用戶名后，將loginbox設(shè)置為不顯示，將chatbox設(shè)置為顯示*/
  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);//調(diào)用init方法
   }
   return false;
  },
  //用戶初始化
  init: function (userName) {
   //隨機數(shù)生成uid
   this.userId = this.genUid();
   this.userName = userName;
   d.getElementById('showUserName').innerHTML = this.userName;//[newpidian]|[退出]
   this.scrollToBottom();
   //連接socketIO服務(wù)器,newpidian的IP地址
   this.socket = io.connect('192.168.3.155:3000');
   //向服務(wù)器發(fā)送某用戶已經(jīng)登錄了
   this.socket.emit('login', {userId: this.userId, userName: this.userName});
   //監(jiān)聽來自服務(wù)器的login，即在客戶端socket.emit('login ')發(fā)送后，客戶端就會收到來自服務(wù)器的
   // io.emit('login', {onLineUsers: onLineUsers, onLineCounts: onLineCounts, user: user});
   /*監(jiān)聽到有用戶login了，更新信息*/
   this.socket.on('login', function (o) {
    //更新系統(tǒng)信息
    CHAT.updateSysMsg(o, 'login');
   });
   /*監(jiān)聽到有用戶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
   //};
   /*監(jiān)聽到有用戶發(fā)送消息了*/
   this.socket.on("message", function (obj) {
    //判斷消息是不是自己發(fā)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();
   });
  }
 }
 /*控制鍵鍵碼值(keyCode)
  按鍵 鍵碼 按鍵 鍵碼 按鍵 鍵碼 按鍵 鍵碼
  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
  * */
 //通過“回車鍵”提交用戶名
 d.getElementById('userName').onkeydown = function (e) {
  console.log(e);
  e = e || event;
  if (e.keyCode === 13) {
   CHAT.userNameSubmit();
  }
 };
 //通過“回車鍵”提交聊天內(nèi)容
 d.getElementById('content').onkeydown = function (e) {
  e = e || event;
  if (e.keyCode === 13) {
   CHAT.submit();
  }
 };
})();