1 //引入所需要的类2 dojo.require("dojox.cometd");3 dojo.require("dojox.cometd.timestamp");4 5 //定义一个room类6 varroom={7 //定义属性8 _last:"",//最后发送消息的人员(如果不是本人，则显示为空)9 _username:null,//当前的用户名10 _connected:true,//当前的连接状态 true已经连接, false表示未连接11 groupName:"whimsical",//组名(未知)12 13 //登录操作14 join:function(name){15 16 if(name==null||name.length==0){17 alert('Please enter a username!');18 }else{19 20 dojox.cometd.init(newString(document.location).replace(/http:\/\/[^\/]*/,'').replace(/\/examples\/.*$/,'')+"/cometd");21 //dojox.cometd.init("http://127.0.0.2:8080/cometd");22 this._connected=true;23 24 this._username=name;25 dojo.byId('join').className='hidden';26 dojo.byId('joined').className='';27 dojo.byId('phrase').focus();28 29 //subscribe and join30 dojox.cometd.startBatch();31 dojox.cometd.subscribe("/chat/demo", room,"_chat", { groupName:this.groupName});32 dojox.cometd.publish("/chat/demo", {33 user: room._username,34 join:true,35 chat : room._username+"has joined"36 }, { groupName:this.groupName });37 dojox.cometd.endBatch();38 39 //handle cometd failures while in the room40 room._meta=dojo.subscribe("/cometd/meta",this,function(event){41 console.debug(event);42 if(event.action=="handshake"){43 room._chat({ data: {44 join:true,45 user:"SERVER",46 chat:"reinitialized"47 } });48 dojox.cometd.subscribe("/chat/demo", room,"_chat", { groupName:this.groupName });49 }elseif(event.action=="connect"){50 if(event.successful&&!this._connected){51 room._chat({ data: {52 leave:true,53 user:"SERVER",54 chat:"reconnected!"55 } });56 }57 if(!event.successful&&this._connected){58 room._chat({ data: {59 leave:true,60 user:"SERVER",61 chat:"disconnected!"62 } });63 }64 this._connected=event.successful;65 }66 }, {groupName:this.groupName });67 }68 },69 70 //离开操作71 leave:function(){72 if(!room._username){73 return;74 }75 76 if(room._meta){77 dojo.unsubscribe(room._meta,null,null, { groupName:this.groupName });78 }79 room._meta=null;80 81 dojox.cometd.startBatch();82 dojox.cometd.unsubscribe("/chat/demo", room,"_chat", { groupName:this.groupName });83 dojox.cometd.publish("/chat/demo", {84 user: room._username,85 leave:true,86 chat : room._username+"has left"87 }, { groupName:this.groupName });88 dojox.cometd.endBatch();89 90 //switch the input form91 dojo.byId('join').className='';92 dojo.byId('joined').className='hidden';93 dojo.byId('username').focus();94 room._username=null;95 dojox.cometd.disconnect();96 },97 98 //发送消息99 chat:function(text){100 if(!text||!text.length){101 returnfalse;102 }103 dojox.cometd.publish("/chat/demo", { user: room._username, chat: text}, { groupName:this.groupName });104 },105 106 //从服务器收到消息后，回调的方法107 _chat:function(message){108 varchat=dojo.byId('chat');109 if(!message.data){110 console.debug("bad message format"+message);111 return;112 }113 varfrom=message.data.user;114 varspecial=message.data.join||message.data.leave;115 vartext=message.data.chat;116 if(!text){return; }117 118 if(!special&&from==room._last ){119 from="";120 }else{121 room._last=from;122 from+=":";123 }124 125 if(special){126 chat.innerHTML+=""+from+"

"+text+"
";127 room._last="";128 }else{129 chat.innerHTML+=""+from+" "+text+"
";130 }131 chat.scrollTop=chat.scrollHeight-chat.clientHeight;132 },133 134 //初始操作135 _init:function(){136 dojo.byId('join').className='';137 dojo.byId('joined').className='hidden';138 dojo.byId('username').focus();139 140 varelement=dojo.byId('username');141 element.setAttribute("autocomplete","OFF");142 dojo.connect(element,"onkeyup",function(e){//支持回车，登录143 if(e.keyCode==dojo.keys.ENTER){144 room.join(dojo.byId('username').value);145 returnfalse;146 }147 returntrue;148 });149 150 dojo.connect(dojo.byId('joinB'),"onclick",function(e){//绑定 room.join方法到 Join按扭151 room.join(dojo.byId('username').value);152 e.preventDefault();153 });154 155 element=dojo.byId('phrase');//取得消息框156 element.setAttribute("autocomplete","OFF");157 dojo.connect(element,"onkeyup",function(e){//支持回车发送消息158 if(e.keyCode==dojo.keys.ENTER){159 room.chat(dojo.byId('phrase').value);160 dojo.byId('phrase').value='';161 e.preventDefault();162 }163 });164 165 dojo.connect(dojo.byId('sendB'),"onclick",function(e){//绑定 room.chat方法到 sendB按扭166 room.chat(dojo.byId('phrase').value);167 dojo.byId('phrase').value='';168 });169 dojo.connect(dojo.byId('leaveB'),"onclick", room,"leave");//绑定 room.leave方法到 leaveB按扭170 }171 };172 173 //页面装载时，调用room._init方法174 dojo.addOnLoad(room,"_init");175 //页面关闭时，调用 room.leave方法176 dojo.addOnUnload(room,"leave");177 178 //vim:ts=4:noet: