基于NetGroup的P2P多人聊天室

 

 

原址：

http://swfever.com/?p=956

 

 

在Stratus Beta2上线后，有很多朋友表示不知道如何基于NetGroup进行开发。事实上，NetGroup是一个非常强大的类，可以实现诸如Direct Routing, Posting和Object Replication等功能。为此，我花了20分钟时间写了一个简单的Demo：基于NetGroup的P2P多人聊天室，其中主要使用了Posting功能。其他NetGroup功能的使用方法大同小异，请各位自行发掘。

要运行这个Demo，你需要一个Stratus Developer Key，并确保你的Flash Player版本为10.1。

 代码：

<?xml version="1.0" encoding="utf-8"?>

<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"

      xmlns:s="library://ns.adobe.com/flex/spark" width="600" height="400">

      <fx:Script> .... </fx:Script> 

      <s:TextInput id="developerKeyInput" x="10" y="10" width="304" text="@{developerKey}"/>

      <s:TextInput id="yourNameInput" x="320" y="10" width="192" text="@{yourName}"/>

      <s:Button id="connectBtn" x="520" y="10" label="Connect" click="connectBtn_onClick()" />

      <s:TextArea text="{logText}" left="10" right="10" bottom="10" editable="false"/>

      <s:TextArea text="{chatMsg}" width="372"  x="218" y="56" height="129" editable="false"/>

      <s:Label left="10" bottom="170" text="Log:"/>

      <s:Label left="10" bottom="350" text="Neighbor:"/>

      <s:Label left="218" bottom="350" text="Chat:"/>

      <s:List id="userList" x="10" y="57" width="200" height="153">

            <s:ArrayCollection id="userList_ac" />

      </s:List>

      <s:Button x="520" y="189" label="Send" id="sendButton" click="sendBtn_onClick()" enabled="false"/>

      <s:TextInput x="218" y="188" width="294" id="chatMsgInput"/>

</s:Application>

Script标签内的代码如下：

import mx.utils.StringUtil;

[Bindable]

private var developerKey:String = "Your Developer Key";

[Bindable]

private var yourName:String = "no name";

private const SERVER_URL:String = "rtmfp://stratus.adobe.com/";

[Bindable]

private var logText:String = "";

[Bindable]

private var chatMsg:String = "";

 

private var netConn:NetConnection;

private var netGroup:NetGroup;

 

private function connectBtn_onClick():void {

      if(!netConn) {

            netConn = new NetConnection();

            netConn.addEventListener(NetStatusEvent.NET_STATUS, netConn_onNetStatus);                           

      }

        netConn.connect(SERVER_URL+developerKey);

}

 

private function sendBtn_onClick():void {

      if(StringUtil.trim(chatMsgInput.text).length) {

            var msg:Object = {

                  text: chatMsgInput.text,

                  sender: yourName

            };

            netGroup.post(msg);

            msgRecieved(msg);

            chatMsgInput.text = "";

      }

}

 

private function netConn_onNetStatus(event:NetStatusEvent):void {

      log(event.info.code);

      if(event.info.code == "NetConnection.Connect.Success") {

            connectBtn.enabled = false;

            developerKeyInput.enabled = false;

            yourNameInput.enabled = false;

            log("My Peer Id = "+netConn.nearID);

            var groupSpec:GroupSpecifier = new GroupSpecifier("swfever");

            groupSpec.serverChannelEnabled = true;

            groupSpec.ipMulticastMemberUpdatesEnabled = true;

            groupSpec.multicastEnabled = true;

            groupSpec.postingEnabled = true;

            var groupId:String = groupSpec.groupspecWithAuthorizations();

            log("Group Id = "+groupId);

            netGroup = new NetGroup(netConn,groupId);

            netGroup.addEventListener(NetStatusEvent.NET_STATUS, netGroup_onNetStatus);

      } else

      if(event.info.code == "NetGroup.Connect.Success") {

            sendButton.enabled = true;

      }

}

 

private function netGroup_onNetStatus(event:NetStatusEvent):void {

      log(event.info.code);

      if(event.info.code == "NetGroup.Neighbor.Connect") {

            log("NetGroup Neighbor Count = "+netGroup.neighborCount);

            userList_ac.addItem(event.info.neighbor);

      } else

      if(event.info.code == "NetGroup.Neighbor.Disconnect") {

            log("NetGroup Neighbor Count = "+netGroup.neighborCount);     

            userList_ac.removeItemAt(userList_ac.getItemIndex(event.info.neighbor));

      } else

      if(event.info.code == "NetGroup.Posting.Notify") {

            msgRecieved(event.info.message);

      }

}

 

private function log(msg:String):void {

      logText+=msg+"/n";

}

 

private function msgRecieved(msg:Object):void {

      chatMsg+=msg.sender+" : "+msg.text+"/n";

}

源代码下载

  NetGroup_Posting_Demo_src (1.4 KiB, 56 hits)