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改造MUC实现Openfire群

2011-12-31T09:53:00Z

我的Openfire群实现思路：

1、群和群成员，要保存到表中。

2、拉取群列表和群成员列表，均从DB中查询返回。

3、抛弃老外的“进房间，要发Presence ”。只要此人一上线，就模似一个Presence进行joinRoom，进入他的各群房间。

多了解LocalMUCRoom 类中：public LocalMUCRole joinRoom(String nickname, String password, HistoryRequest historyRequest, LocalMUCUser user, Presence presence)

我的模似代码如下：

1 /**
2      * 模似用户进群（含呢称、含Precense、初始化角色LocalMUCRole）
3      * @param roomId
4      * @param packet
5      * @return
6      */
7     public MUCRole getRolesByRoomId(long roomId, Packet packet)
8     {
9         MUCRole role = null;
10         try {
11             // Get or create the room  获取该群
12             MUCRoom room = server.getChatRoom(roomId, packet.getFrom());
13
14             //从数据库中查询他的姓名作为昵称（得自己实现）
15             String nickname = new MUCRoomServiceDao().getUserNickname(packet.getFrom().getNode());
16             if(nickname == null)
17             {
18                 if(packet.getFrom().getResource() != null)
19                 {
20                     nickname = packet.getFrom().getResource();
21                 }
22                 else
23                 {
24                     nickname = packet.getFrom().getNode();
25                 }
26             }
27
28             HistoryRequest historyRequest = null;
29             String password = null;
30
31             //构建成员进入群的Presence
32             Presence presence = new Presence();
33             presence.setTo(room.getJID().toBareJID() + "/" + nickname);
34             presence.setFrom(packet.getFrom());
35             PacketExtension extension = new PacketExtension("x", http://jabber.org/protocol/muc);
36             presence.addExtension(extension);
37
38             // The user joins the room 用户进入群
39             role = room.joinRoom(nickname,
40                     password,
41                     historyRequest,
42                     this,
43                     presence);
44
45             // If the client that created the room is non-MUC compliant then
46             // unlock the room thus creating an "instant" room
47             //if (mucInfo == null && room.isLocked() && !room.isManuallyLocked()) {
48             if (room.isLocked() && !room.isManuallyLocked()) {
49                 room.unlock(role);
50                 //server.chatRoomAdded((LocalMUCRoom)room);
51             }
52
53             addRole(roomId, (LocalMUCRole)role);//添加“用户在某个群中的角色”
54
55         }
56         catch (UnauthorizedException e) {
57             sendErrorPacket(packet, PacketError.Condition.not_authorized);
58         }
59         catch (ServiceUnavailableException e) {
60             sendErrorPacket(packet, PacketError.Condition.service_unavailable);
61         }
62         catch (UserAlreadyExistsException e) {
63             sendErrorPacket(packet, PacketError.Condition.conflict);
64         }
65         catch (RoomLockedException e) {
66             sendErrorPacket(packet, PacketError.Condition.recipient_unavailable);
67         }
68         catch (ForbiddenException e) {
69             sendErrorPacket(packet, PacketError.Condition.forbidden);
70         }
71         catch (RegistrationRequiredException e) {
72             sendErrorPacket(packet, PacketError.Condition.registration_required);
73         }
74         catch (ConflictException e) {
75             sendErrorPacket(packet, PacketError.Condition.conflict);
76         }
77         catch (NotAcceptableException e) {
78             sendErrorPacket(packet, PacketError.Condition.not_acceptable);
79         }
80         catch (NotAllowedException e) {
81             sendErrorPacket(packet, PacketError.Condition.not_allowed);
82         }
83         return role;
84     }

4、抛弃老外的“以昵称为Key 缓存群成员”。改为以帐号为Key。

多了解 LocalMUCRoom 类中：private Map<String,MUCRole> occupants = new ConcurrentHashMap<String, MUCRole>();

在joinRoom办法中：

1 //以JID作为缓存的key
2         JID userJid = user.getAddress();
3         if (userJid != null) {
4             occupants.put(userJid.toBareJID(), joinRole);
5         }

5、详细了解 LocalMUCRoom、LocalMUCUser、LocalMUCRole这三个类，各类中的数据成员、方法。

本文链接

Openfire S2S 经验分享

2011-12-21T04:21:00Z

1、各Openfire服务器得设置不同的域名，即 ofProperty表xmpp.domain属性，如设置 192.168.1.46等。

2、Dialback提供一种弱身份验证的方式，要使用这种方式可以将 ofproperty表中“xmpp.server.tls.enabled” 设置为false，并将“xmpp.server.dialback.enabled”设置为true。

3、Socket探测对方5269端口是否开放。

LocalOutgoingServerSession类 createOutgoingSession方法：

1 private static LocalOutgoingServerSession createOutgoingSession(String domain, String hostname,
2             int port) {
3         boolean useTLS = JiveGlobals.getBooleanProperty("xmpp.server.tls.enabled", true);
4         RemoteServerConfiguration configuration = RemoteServerManager.getConfiguration(hostname);
5         if (configuration != null) {
6             // TODO Use the specific TLS configuration for this remote server
7             //useTLS = configuration.isTLSEnabled();
8         }
9
10         // Connect to remote server using XMPP 1.0 (TLS + SASL EXTERNAL or TLS + server dialback or server dialback)
11         SocketConnection connection = null;
12         String realHostname = null;
13         int realPort = port;
14         Socket socket = new Socket();
15         try {
16             // Get the real hostname to connect to using DNS lookup of the specified hostname
17             DNSUtil.HostAddress address = DNSUtil.resolveXMPPServerDomain(hostname, port);
18             realHostname = address.getHost();
19             realPort = address.getPort();
20             Log.debug("LocalOutgoingServerSession: OS - Trying to connect to " + hostname + ":" + port +
21                     "(DNS lookup: " + realHostname + ":" + realPort + ")");
22             // Establish a TCP connection to the Receiving Server
23             socket.connect(new InetSocketAddress(realHostname, realPort),
24                     RemoteServerManager.getSocketTimeout());
25             Log.debug("LocalOutgoingServerSession: OS - Plain connection to " + hostname + ":" + port + " successful");
26         }
27         catch (Exception e) {
28             Log.error("Error trying to connect to remote server: " + hostname +
29                     "(DNS lookup: " + realHostname + ":" + realPort + ")", e);
30             return null;
31         }

4、握手。
LocalOutgoingServerSession类 createOutgoingSession方法：

1 // Check if we are going to try server dialback (XMPP 1.0)
2                     else if (ServerDialback.isEnabled() && features.element("dialback") != null) {
3                         Log.debug("LocalOutgoingServerSession: OS - About to try connecting using server dialback XMPP 1.0 with: " + hostname);
4                         ServerDialback method = new ServerDialback(connection, domain);
5                         OutgoingServerSocketReader newSocketReader = new OutgoingServerSocketReader(reader);
6                         if (method.authenticateDomain(newSocketReader, domain, hostname, id)) {
7                             Log.debug("LocalOutgoingServerSession: OS - SERVER DIALBACK XMPP 1.0 with " + hostname + " was successful");
8                             StreamID streamID = new BasicStreamIDFactory().createStreamID(id);
9                             LocalOutgoingServerSession session = new LocalOutgoingServerSession(domain, connection, newSocketReader, streamID);
10                             connection.init(session);
11                             // Set the hostname as the address of the session
12                             session.setAddress(new JID(null, hostname, null));
13                             return session;
14                         }
15                         else {
16                             Log.debug("LocalOutgoingServerSession: OS - Error, SERVER DIALBACK with " + hostname + " failed");
17                         }
18                     }
19

5、建立信任。加入路由表的serversCache缓存。
RoutingTableImpl类 routePacket(JID jid, Packet packet, boolean fromServer)方法：

1 // Packet sent to remote server
2             byte[] nodeID = serversCache.get(jid.getDomain());
3             if (nodeID != null) {
4                 if (server.getNodeID().equals(nodeID)) {
5                     // This is a route to a remote server connected from this node
6                     try {
7                         localRoutingTable.getRoute(jid.getDomain()).process(packet);
8                         routed = true;
9                     } catch (UnauthorizedException e) {
10                         Log.error(e);
11                     }
12                 }
13                 else {
14                     // This is a route to a remote server connected from other node
15                     if (remotePacketRouter != null) {
16                         routed = remotePacketRouter.routePacket(nodeID, jid, packet);
17                     }
18                 }
19             }
20             else {
21                 // Return a promise of a remote session. This object will queue packets pending
22                 // to be sent to remote servers
23                 OutgoingSessionPromise.getInstance().process(packet);
24                 routed = true;
25             }

6、包再次路由，通过SocketConnection类的deliver(Packet packet)发出。

1 public void deliver(Packet packet) throws UnauthorizedException, PacketException {
2         if (isClosed()) {
3             backupDeliverer.deliver(packet);
4         }
5         else {
6             boolean errorDelivering = false;
7             boolean allowedToWrite = false;
8             try {
9                 requestWriting();
10                 allowedToWrite = true;
11                 xmlSerializer.write(packet.getElement());
12                 if (flashClient) {
13                     writer.write('\0');
14                 }
15                 xmlSerializer.flush();
16             }
17             catch (Exception e) {
18                 Log.debug("Error delivering packet" + "\n" + this.toString(), e);
19                 errorDelivering = true;
20             }
21             finally {
22                 if (allowedToWrite) {
23                     releaseWriting();
24                 }
25             }
26             if (errorDelivering) {
27                 close();
28                 // Retry sending the packet again. Most probably if the packet is a
29                 // Message it will be stored offline
30                 backupDeliverer.deliver(packet);
31             }
32             else {
33                 session.incrementServerPacketCount();
34             }
35         }
36     }

7、对方Openfire服务器在ServerSocketReader类的 packetReceived(Packet packet) 接收，并响应回包。

1 private void packetReceived(Packet packet) throws PacketRejectedException {
2         if (packet.getTo() == null || packet.getFrom() == null) {
3             Log.debug("Closing IncomingServerSession due to packet with no TO or FROM: " +
4                     packet.toXML());
5             // Send a stream error saying that the packet includes no TO or FROM
6             StreamError error = new StreamError(StreamError.Condition.improper_addressing);
7             connection.deliverRawText(error.toXML());
8             // Close the underlying connection
9             connection.close();
10             open = false;
11             throw new PacketRejectedException("Packet with no TO or FROM attributes");
12         }
13         else if (!((LocalIncomingServerSession) session).isValidDomain(packet.getFrom().getDomain())) {
14             Log.debug("Closing IncomingServerSession due to packet with invalid domain: " +
15                     packet.toXML());
16             // Send a stream error saying that the packet includes an invalid FROM
17             StreamError error = new StreamError(StreamError.Condition.invalid_from);
18             connection.deliverRawText(error.toXML());
19             // Close the underlying connection
20             connection.close();
21             open = false;
22             throw new PacketRejectedException("Packet with no TO or FROM attributes");
23         }
24     }

本文链接

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