mucuserimpl.java

来自「基于Jabber协议的即时消息服务器」· Java 代码 · 共 542 行 · 第 1/2 页

                                    // An occupant has declined an invitation
                                    Element info = userInfo.element("decline");
                                    room.sendInvitationRejection(new JID(info.attributeValue("to")),
                                            info.elementTextTrim("reason"), packet.getFrom());
                                }
                                else {
                                    sendErrorPacket(packet, PacketError.Condition.bad_request);
                                }
                            }
                            else {
                                sendErrorPacket(packet, PacketError.Condition.bad_request);
                            }
                        }
                    }
                    catch (ForbiddenException e) {
                        sendErrorPacket(packet, PacketError.Condition.forbidden);
                    }
                    catch (NotFoundException e) {
                        sendErrorPacket(packet, PacketError.Condition.recipient_unavailable);
                    }
                    catch (ConflictException e) {
                        sendErrorPacket(packet, PacketError.Condition.conflict);
                    }
                }
            }
        }
    }

    public void process(IQ packet) {
        // Ignore IQs of type ERROR or RESULT sent to a room
        if (IQ.Type.error == packet.getType()) {
            return;
        }
        lastPacketTime = System.currentTimeMillis();
        JID recipient = packet.getTo();
        String group = recipient.getNode();
        if (group == null) {
            // Ignore packets to the groupchat server
            // In the future, we'll need to support TYPE_IQ queries to the server for MUC
            Log.info(LocaleUtils.getLocalizedString("muc.error.not-supported") + " "
                    + packet.toString());
        }
        else {
            MUCRole role = roles.get(group);
            if (role == null) {
                // TODO: send error message to user (can't send packets to group you haven't
                // joined)
            }
            else if (IQ.Type.result == packet.getType()) {
                // Only process IQ result packet if it's a private packet sent to another
                // room occupant
                if (packet.getTo().getResource() != null) {
                    try {
                        // User is sending an IQ result packet to another room occupant
                        role.getChatRoom().sendPrivatePacket(packet, role);
                    }
                    catch (NotFoundException e) {
                        // Do nothing. No error will be sent to the sender of the IQ result packet
                    }
                }
            }
            else {
                // Check and reject conflicting packets with conflicting roles
                // In other words, another user already has this nickname
                if (!role.getChatUser().getAddress().equals(packet.getFrom())) {
                    sendErrorPacket(packet, PacketError.Condition.conflict);
                }
                else {
                    try {
                        Element query = packet.getElement().element("query");
                        if (query != null &&
                                "http://jabber.org/protocol/muc#owner".equals(query.getNamespaceURI())) {
                            role.getChatRoom().getIQOwnerHandler().handleIQ(packet, role);
                        }
                        else if (query != null &&
                                "http://jabber.org/protocol/muc#admin".equals(query.getNamespaceURI())) {
                            role.getChatRoom().getIQAdminHandler().handleIQ(packet, role);
                        }
                        else {
                            if (packet.getTo().getResource() != null) {
                                // User is sending an IQ packet to another room occupant
                                role.getChatRoom().sendPrivatePacket(packet, role);
                            }
                            else {
                                sendErrorPacket(packet, PacketError.Condition.bad_request);
                            }
                        }
                    }
                    catch (ForbiddenException e) {
                        sendErrorPacket(packet, PacketError.Condition.forbidden);
                    }
                    catch (NotFoundException e) {
                        sendErrorPacket(packet, PacketError.Condition.recipient_unavailable);
                    }
                    catch (ConflictException e) {
                        sendErrorPacket(packet, PacketError.Condition.conflict);
                    }
                    catch (NotAllowedException e) {
                        sendErrorPacket(packet, PacketError.Condition.not_allowed);
                    }
                    catch (Exception e) {
                        sendErrorPacket(packet, PacketError.Condition.internal_server_error);
                    }
                }
            }
        }
    }

    public void process(Presence packet) {
        // Ignore presences of type ERROR sent to a room
        if (Presence.Type.error == packet.getType()) {
            return;
        }
        lastPacketTime = System.currentTimeMillis();
        JID recipient = packet.getTo();
        String group = recipient.getNode();
        if (group == null) {
            if (Presence.Type.unavailable == packet.getType()) {
                server.removeUser(packet.getFrom());
            }
        }
        else {
            MUCRole role = roles.get(group);
            if (role == null) {
                // If we're not already in a room, we either are joining it or it's not
                // properly addressed and we drop it silently
                if (recipient.getResource() != null
                        && recipient.getResource().trim().length() > 0) {
                    if (packet.isAvailable()) {
                        try {
                            // Get or create the room
                            MUCRoom room = server.getChatRoom(group, packet.getFrom());
                            // User must support MUC in order to create a room
                            Element mucInfo = packet.getChildElement("x",
                                    "http://jabber.org/protocol/muc");
                            HistoryRequest historyRequest = null;
                            String password = null;
                            // Check for password & requested history if client supports MUC
                            if (mucInfo != null) {
                                password = mucInfo.elementTextTrim("password");
                                if (mucInfo.element("history") != null) {
                                    historyRequest = new HistoryRequest(mucInfo);
                                }
                            }
                            // The user joins the room
                            role = room.joinRoom(recipient.getResource().trim(),
                                    password,
                                    historyRequest,
                                    this,
                                    packet.createCopy());
                            // If the client that created the room is non-MUC compliant then
                            // unlock the room thus creating an "instant" room
                            if (mucInfo == null && room.isLocked() && !room.isManuallyLocked()) {
                                room.unlock(role);
                            }
                        }
                        catch (UnauthorizedException e) {
                            sendErrorPacket(packet, PacketError.Condition.not_authorized);
                        }
                        catch (ServiceUnavailableException e) {
                            sendErrorPacket(packet, PacketError.Condition.service_unavailable);
                        }
                        catch (UserAlreadyExistsException e) {
                            sendErrorPacket(packet, PacketError.Condition.conflict);
                        }
                        catch (RoomLockedException e) {
                            sendErrorPacket(packet, PacketError.Condition.recipient_unavailable);
                        }
                        catch (ForbiddenException e) {
                            sendErrorPacket(packet, PacketError.Condition.forbidden);
                        }
                        catch (RegistrationRequiredException e) {
                            sendErrorPacket(packet, PacketError.Condition.registration_required);
                        }
                        catch (ConflictException e) {
                            sendErrorPacket(packet, PacketError.Condition.conflict);
                        }
                        catch (NotAcceptableException e) {
                            sendErrorPacket(packet, PacketError.Condition.not_acceptable);
                        }
                        catch (NotAllowedException e) {
                            sendErrorPacket(packet, PacketError.Condition.not_allowed);
                        }
                    }
                    else {
                        // TODO: send error message to user (can't send presence to group you
                        // haven't joined)
                    }
                }
                else {
                    if (packet.isAvailable()) {
                        // A resource is required in order to join a room
                        sendErrorPacket(packet, PacketError.Condition.bad_request);
                    }
                    // TODO: send error message to user (can't send packets to group you haven't
                    // joined)
                }
            }
            else {
                // Check and reject conflicting packets with conflicting roles
                // In other words, another user already has this nickname
                if (!role.getChatUser().getAddress().equals(packet.getFrom())) {
                    sendErrorPacket(packet, PacketError.Condition.conflict);
                }
                else {
                    if (Presence.Type.unavailable == packet.getType()) {
                        try {
                            removeRole(group);
                            role.getChatRoom().leaveRoom(role.getNickname());
                        }
                        catch (UserNotFoundException e) {
                            // Do nothing since the users has already left the room
                        }
                        catch (Exception e) {
                            Log.error(e);
                        }
                    }
                    else {
                        try {
                            String resource = (recipient.getResource() == null
                                    || recipient.getResource().trim().length() == 0 ? null
                                    : recipient.getResource().trim());
                            if (resource == null
                                    || role.getNickname().equalsIgnoreCase(resource)) {
                                // Occupant has changed his availability status
                                role.setPresence(packet.createCopy());
                                role.getChatRoom().send(role.getPresence().createCopy());
                            }
                            else {
                                // Occupant has changed his nickname. Send two presences
                                // to each room occupant

                                // Check if occupants are allowed to change their nicknames
                                if (!role.getChatRoom().canChangeNickname()) {
                                    sendErrorPacket(packet, PacketError.Condition.not_acceptable);
                                }
                                // Answer a conflic error if the new nickname is taken
                                else if (role.getChatRoom().hasOccupant(resource)) {
                                    sendErrorPacket(packet, PacketError.Condition.conflict);
                                }
                                else {
                                    // Send "unavailable" presence for the old nickname
                                    Presence presence = role.getPresence().createCopy();
                                    // Switch the presence to OFFLINE
                                    presence.setType(Presence.Type.unavailable);
                                    presence.setStatus(null);
                                    // Add the new nickname and status 303 as properties
                                    Element frag = presence.getChildElement("x",
                                            "http://jabber.org/protocol/muc#user");
                                    frag.element("item").addAttribute("nick", resource);
                                    frag.addElement("status").addAttribute("code", "303");
                                    role.getChatRoom().send(presence);

                                    // Send availability presence for the new nickname
                                    String oldNick = role.getNickname();
                                    role.setPresence(packet.createCopy());
                                    role.changeNickname(resource);
                                    role.getChatRoom().nicknameChanged(oldNick, resource);
                                    role.getChatRoom().send(role.getPresence().createCopy());
                                }
                            }
                        }
                        catch (Exception e) {
                            Log.error(LocaleUtils.getLocalizedString("admin.error"), e);
                        }
                    }
                }
            }
        }
    }
}