Openfire 抓取packet

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简述：

在openfire后台插件开发过程中，抓取通信往来的packet十分重要，而openfire的设计也考虑到了这一点，除了增加扩展性的Plugin接口，他也定义了一个包拦截器接口

PacketInterceptor ,本次试验就要用到这个抓包接口。

参考：

感谢两篇博客给了明确方向，

1， http://blog.csdn.net/ibm_hoojo/article/details/8736341

2， http://blog.csdn.net/dyflovexlp/article/details/4578929

步骤：

文件夹结构：

1. 首先添加Plugin, 这里先做一个没有后台界面的Plugin

Plugin.xml

<?xml version="1.0" encoding="UTF-8"?><plugin>    <!-- Main plugin class  插件的全路径-->    <class>com.anialy.openfire.chatwrapper.ChatWrapperPlugin</class>     <!-- Plugin meta-data -->    <name>ChatWrapperPlugin</name>    <description>Chat Wrapper Plugin</description>    <author>anialy</author>     <version>1.0</version>    <date>19/04/2013</date>    <minServerVersion>3.7.2</minServerVersion>    <licenseType>gpl</licenseType>     <adminconsole>        </adminconsole></plugin>

2. 之后是两个Java类文件

ChatWrapperPlugin.java

package com.anialy.openfire.chatwrapper;import java.io.File;import java.util.List;import org.jivesoftware.openfire.container.Plugin;import org.jivesoftware.openfire.container.PluginManager;import org.jivesoftware.openfire.interceptor.InterceptorManager;import org.jivesoftware.openfire.interceptor.PacketInterceptor;import org.jivesoftware.openfire.interceptor.PacketRejectedException;import org.jivesoftware.openfire.session.Session;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.xmpp.packet.Message;import org.xmpp.packet.Packet;import com.anialy.openfire.chatwrapper.intercepter.ChatWrapperInterceptor;public class ChatWrapperPlugin implements Plugin {private PacketInterceptor pktInterceptor = null;//openfire server维护的一个拦截器集合private InterceptorManager icpManager = InterceptorManager.getInstance();@Overridepublic void initializePlugin(PluginManager manager, File pluginDirectory) {System.out.println("安装 ChatWrapper 插件");pktInterceptor = new ChatWrapperInterceptor();icpManager.addInterceptor(pktInterceptor);}@Overridepublic void destroyPlugin() {System.out.println("卸载 ChatWrapper 插件");if(pktInterceptor != null){icpManager.removeInterceptor(pktInterceptor);}}}

ChatWrapperInterceptor.java

package com.anialy.openfire.chatwrapper.intercepter;import java.util.List;import org.jivesoftware.openfire.interceptor.PacketInterceptor;import org.jivesoftware.openfire.interceptor.PacketRejectedException;import org.jivesoftware.openfire.session.Session;import org.xmpp.packet.Message;import org.xmpp.packet.Packet;public class ChatWrapperInterceptor implements PacketInterceptor {@Overridepublic void interceptPacket(Packet packet, Session session,boolean incoming, boolean processed) throws PacketRejectedException {System.out.println("Intercept Packet ~~~~~~~~~~~~");Packet copyPacket = packet.createCopy();if(packet instanceof Message){Message message = (Message) copyPacket;// 一对一聊天，单人模式if (message.getType() == Message.Type.chat) {System.out.println("单人聊天信息：" + message.toXML());// 程序执行中；是否为结束或返回状态（是否是当前session用户发送消息）if (processed || !incoming) {return;}// 群聊天，多人模式} else if (message.getType() ==  Message.Type.groupchat) {List<?> els = message.getElement().elements("x");if (els != null && !els.isEmpty()) {System.out.println("群聊天信息：" + message.toXML());} else {System.out.println("群系统信息：" + message.toXML());}  // 其他信息} else {System.out.println("其他信息：" + message.toXML());}}}}

输出：

1. 当单人聊天时：发送消息“你好呀”

Intercept Packet ~~~~~~~~~~~~单人聊天信息：<message id="qSFSM-94" to="tester2@anialy-pc/Spark 2.6.3" from="tester1@anialy-pc/Spark 2.6.3" type="chat"><body>你好呀</body><thread>fwXwHx</thread><x xmlns="jabber:x:event"><offline/><composing/></x></message>Intercept Packet ~~~~~~~~~~~~单人聊天信息：<message id="qSFSM-94" to="tester2@anialy-pc/Spark 2.6.3" from="tester1@anialy-pc/Spark 2.6.3" type="chat"><body>你好呀</body><thread>fwXwHx</thread><x xmlns="jabber:x:event"><offline/><composing/></x></message>Intercept Packet ~~~~~~~~~~~~单人聊天信息：<message id="qSFSM-94" to="tester2@anialy-pc/Spark 2.6.3" from="tester1@anialy-pc/Spark 2.6.3" type="chat"><body>你好呀</body><thread>fwXwHx</thread><x xmlns="jabber:x:event"><offline/><composing/></x></message>Intercept Packet ~~~~~~~~~~~~单人聊天信息：<message id="qSFSM-94" to="tester2@anialy-pc/Spark 2.6.3" from="tester1@anialy-pc/Spark 2.6.3" type="chat"><body>你好呀</body><thread>fwXwHx</thread><x xmlns="jabber:x:event"><offline/><composing/></x></message>

2. 当群聊时：

Intercept Packet ~~~~~~~~~~~~群聊天信息：<message id="qSFSM-77" to="测试聊天室@conference.anialy-pc" type="groupchat" from="tester1@anialy-pc/Spark 2.6.3"><body>阿斯蒂芬</body><x xmlns="jabber:x:event"><offline/><delivered/><displayed/><composing/></x></message>Intercept Packet ~~~~~~~~~~~~群聊天信息：<message id="qSFSM-77" to="tester1@anialy-pc/Spark 2.6.3" type="groupchat" from="测试聊天室@conference.anialy-pc/tester1"><body>阿斯蒂芬</body><x xmlns="jabber:x:event"><offline/><delivered/><displayed/><composing/></x></message>Intercept Packet ~~~~~~~~~~~~群聊天信息：<message id="qSFSM-77" to="tester1@anialy-pc/Spark 2.6.3" type="groupchat" from="测试聊天室@conference.anialy-pc/tester1"><body>阿斯蒂芬</body><x xmlns="jabber:x:event"><offline/><delivered/><displayed/><composing/></x></message>Intercept Packet ~~~~~~~~~~~~群聊天信息：<message id="qSFSM-77" to="tester1@anialy-pc/Spark 2.6.3" type="groupchat" from="测试聊天室@conference.anialy-pc/tester1"><body>阿斯蒂芬</body><x xmlns="jabber:x:event"><offline/><delivered/><displayed/><composing/></x></message>

小结：

有了PacketInterceptor，我们发现在服务器收发消息的时候我们可以做很多事情，比如对抓到的数据包做后台记录，又比如压缩数据包减少网络流量或是延时，这是值得继续做实验的