flash与后台数据交换方法整理4-XMLSocket篇(转载)：有点意思，有时间研究下

XMLSocket主要用于与服务端进行即时通信，目前的应用领域主要是Flash文本聊天和Flash在线游戏等方面。
    XMLSocket的优点：
    1、能和服务端即时通信；
    2、Flash Player 5.0以上的版本内置类，不需另装组件或插件；
    3、因为XMLSocket就是相当于一个Socket客户端，所以一般的中间件都支持的（如java，.Net等）
    XMLSocket的缺点：
    1、XMLSocket只能传字符串或xml格式的文本，数据类型单一；
    2、XMLSocket服务端自行开发的话，需要对Socket技术比较了解才行，好在网上有现成的服务端软件（商业的XMLSocket Server 有Unity、Fortress；开源的XMLSocket Server 有Oregano Multiuser Server）；
    3、还有就是XMLSocket的80端口与flash安全策略问题。（网上有一个解决方法，不知是否可行，请自行验证）

 

//=======================================;// Flash客户端（以Flash文本聊天为例）;//=======================================;var paramObj:Object = new Object();//命令分隔符；paramObj.CommandDelimiters = "-@@##@@-";//用户列表分隔符；paramObj.PeopleDelimiters = "-@#@-";//建立XMLSocket对象；var socket:XMLSocket = new XMLSocket();//连接状态事件；socket.onConnect = function(success) {trace("socket.onConnect:"+success);if (!success) {trace("服务器连接失败,请检查网络状态!");}};//关闭事件；socket.onClose = function() {trace("服务端已关闭！");logoutChat();};//数据通信事件；socket.onData = function(src) {//trace("socket.onData:"+src);doCommand(getCmdArrayByMsg(trim(src)));};//用户登录；function loginChat():Void {//连接Socket服务端；socket.connect(“localhost”, “8888”);sendSocket("INFO"+paramObj.CommandDelimiters+msg);}//用户注销；function logoutChat(b:Boolean):Void {sendSocket("QUIT");}//显示聊天信息；function showChat(msg:String):Void {trace(“聊天信息：”+msg);}//发送聊天信息；function sendChat(msg:String):Void{sendSocket("MSG"+paramObj.CommandDelimiters+msg+paramObj.CommandDelimiters+msg);}//向服务端发送信息；function sendSocket(msg:String):Void {socket.send(msg+"/r");}//处理服务端返回信息；function getCmdArrayByMsg(msg:String):Array {if (msg.charCodeAt(0) == 13 && msg.charCodeAt(1) == 10) {msg = msg.substr(2);}return msg.split(paramObj.CommandDelimiters);}function doCommand(arr:Array):Void {switch (arr[0]) {case "MSG" :showChat(arr[1]);break;case "TAKEN" :trace("你的登录名已经有了,请重新换一个登录名!");break;case "PEOPLE" :doPeople(arr[1]);break;}}//显示在线用户列表；function doPeople(msg:Stringvar people_arr:Array = msg.split(paramObj.PeopleDelimiters);trace(people_arr);}

//上面与XMLSocket有关的主要代码，显示方面自己添加相关组件就行了！
//有一个注意点，在flash向服务端发送的命令的最后一定要加上“/r”，否则服务端无法收到消息（我的服务端是用Java开发的）

//=======================================;// 服务端代码(我用java开发的，其他版本自行研究);// ChatServer.java//=======================================;package com.klstudio.socket.chat;import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;import java.util.Vector;//import com.klstudio.util.Logger;/*** @author kinglong* * TODO 要更改此生成的类型注释的模板，请转至窗口－首选项－ Java －代码样式－代码模板*/public class ChatServer {//private Logger logger;private static Vector clients = new Vector();private static ServerSocket server = null;private static Socket socket = null;public static String CommandDelimiters = "-@@##@@-";public static String PeopleDelimiters = "-@#@-";public ChatServer() {}public static void notifyRoom() {StringBuffer people = new StringBuffer("PEOPLE"+CommandDelimiters+"所有的人");for (int i = 0; i < clients.size(); i++) {Client client = (Client) clients.elementAt(i);people.append(PeopleDelimiters+client.getClientName());}sendClients(people);}public staticboolean checkName(Client newClient){for(int i=0;i<clients.size();i++){Client client = (Client) clients.elementAt(i);if(client != newClient && client.getClientName().equals(newClient.getClientName())){return false;}}return true;}public static void closeAll(){while(clients.size()>0){Client client = (Client) clients.firstElement();try {client.getClientSocket().close();} catch (IOException e) {// TODO 自动生成 catch 块//Logger logger = new Logger(System.out);//logger.log("错误-" + e.toString());} finally {clients.removeElement(client);}}}public static synchronized void disconnect(Client client) {client.send(new StringBuffer("QUIT"));try {client.getClientSocket().close();} catch (IOException e) {// TODO 自动生成 catch 块//Logger logger = new Logger(System.out);//logger.log("错误-" + e.toString());} finally{clients.removeElement(client);}}public static synchronized void sendClients(StringBuffer sb) {for(int i=0;i<clients.size();i++){Client client = (Client) clients.elementAt(i);client.send(sb);}}public static synchronized void sendClients(StringBuffer sb,String ownerName,String toName) {for(int i=0;i<clients.size();i++){Client client = (Client) clients.elementAt(i);if(toName.equals(client.getClientName()) || toName.equals("所有的人") || ownerName.equals(client.getClientName())){client.send(sb);}}}public static synchronized void sendClients(Client ownerClient) {for(int i=0;i<clients.size();i++){Client client = (Client) clients.elementAt(i);if(client.getClientName().equals(ownerClient.getClientName())){client.send(new StringBuffer("MSG"+CommandDelimiters+"系统信息>欢迎你进入!"));}else{client.send(new StringBuffer("MSG"+CommandDelimiters+"系统信息>["+ownerClient.getClientName()+"]用户进入!"));}}}public static void main(String[] args) {int port = 8888; if(args.length>0){port = Integer.parseInt(args[0]);}//Logger logger = new Logger(System.out);//logger.log("信息-ChatServer["+port+"]服务正在启动...");try {server = new ServerSocket(port);} catch (IOException e) {// TODO 自动生成 catch 块//logger.log("错误-"+e.toString());}while(true){if(clients.size()<5){try {socket = server.accept();if(socket != null){//logger.log("信息-"+socket.toString()+"连接");}} catch (IOException e) {// TODO 自动生成 catch 块//logger.log("错误-"+e.toString());}int i=0;do{Client client = new Client(socket);if(client.getClientName() != null){clients.addElement(client);if(checkName(client)){//logger.log("信息-"+"目前有["+clients.size()+"]个用户已连接");sendClients(client);client.start();notifyRoom();}else{client.send(new StringBuffer("TAKEN"));disconnect(client);}i++;}break;}while(i<clients.size());}else{try {Thread.sleep(200);} catch (InterruptedException e) {// TODO 自动生成 catch 块//logger.log("错误-"+e.toString());}}}}}//=======================================;//注意，服务端向客户端发送的信息，必需以”/0”，空字符结尾，否则客户端也无法接收到信息！// Client.java//=======================================;/** 创建日期2005-10-10** TODO 要更改此生成的文件的模板，请转至* 窗口－首选项－ Java －代码样式－代码模板*/package com.klstudio.socket.chat;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintStream;import java.net.Socket;//import com.klstudio.util.Logger;/*** @author kinglong* * TODO 要更改此生成的类型注释的模板，请转至窗口－首选项－ Java －代码样式－代码模板*/public class Client extends Thread {private Socket clientSocket;private String clientName;private String clientIp;private BufferedReader br;private PrintStream ps;//private Logger logger;private ChatServer server;public Client(Socket socket) {//this.logger = new Logger(System.out);this.clientSocket = socket;try {this.br = new BufferedReader(new InputStreamReader(socket.getInputStream(),"utf-8"));this.ps = new PrintStream(socket.getOutputStream(),true,"utf-8");String info = this.br.readLine();if(info!=null){String[] info_arr = info.split(ChatServer.CommandDelimiters);if(info_arr.length>1){this.clientName = info_arr[1];}this.clientIp = socket.getRemoteSocketAddress().toString();}else{socket.close();}} catch (IOException e) {// TODO 自动生成 catch 块//this.logger.log("错误-" + e.toString());}}/*** @return 返回 ip。*/public String getClientIp() {return clientIp;}/*** @return 返回 name。*/public String getClientName() {return clientName;}/*** @return 返回 socket。*/public Socket getClientSocket() {return clientSocket;}public void send(StringBuffer msg){this.ps.println(msg.toString()+"/0");//this.ps.flush();}public void run() {while (true) {String line = null;try {line = this.br.readLine();} catch (IOException e) {// TODO 自动生成 catch 块//this.logger.log("错误-" + e.toString());ChatServer.disconnect(this);ChatServer.notifyRoom();return;}if (line == null) {//this.logger.log("信息-[" + this.clientName + this.clientIp + "]用户离开!");ChatServer.disconnect(this);ChatServer.notifyRoom();if(this.clientName != null){ChatServer.sendClients(new StringBuffer("MSG"+ChatServer.CommandDelimiters+"系统信息>[" + this.clientName + "]用户离开!"));}return;}//this.logger.log("信息-"+line);String[] cmd_arr = line.split(ChatServer.CommandDelimiters);String keyword = cmd_arr[0];keyword = keyword.substring(1);if(keyword.equals("MSG")){StringBuffer msg = new StringBuffer("MSG"+ChatServer.CommandDelimiters);msg.append(this.clientName+">");msg.append(cmd_arr[1]);ChatServer.sendClients(msg,this.clientName,cmd_arr[2]);}else if(keyword.equals("QUIT")){//this.logger.log("信息-[" + this.clientName + this.clientIp + "]用户离开!");ChatServer.disconnect(this);ChatServer.notifyRoom();ChatServer.sendClients(new StringBuffer("MSG"+ChatServer.CommandDelimiters+"系统信息>[" + this.clientName + "]用户离开!"));this.stop();return;}}}}