Smack 中的聊天标记 (XEP-0333)
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【中文标题】Smack 中的聊天标记 (XEP-0333)【英文标题】:Chat Markers (XEP-0333) in Smack 【发布时间】:2018-07-17 20:43:11 【问题描述】:有一个 old question 与此有关,但当时 Smack 不支持此 XMPP 扩展 (XEP-0333)。在 discourse.igniterealtime.org 中也有一个 question,但它没有答案,它的重点是询问他们何时会支持 xep-0333 扩展。
目前 Smack 在Experimental Smack Extensions 支持它,您可以找到代码here。
到目前为止,我一直在寻找示例、指南或如何使用此扩展程序,但没有成功。 我也尝试挖掘代码,希望能找到一些关于如何使用的 javadoc,但也没有成功。
这个问题的目标是获取如何在 smack 4.x.x 中使用它的 sn-p 代码
【问题讨论】:
【参考方案1】:更新:等待 PR 代码审查以更新以下代码。
回答我自己的问题:
正如我所说,Smack 库对 XEP-0333 具有实验性支持,在尝试将其与版本 4.2 和 4.3.0-rc1 一起使用后,我发现需要改进 XEP-0333 以使其像 IncomingChatMessageListener
或 ChatStateListener
一样工作。
此外,我无法使其仅使用 OutgoingChatMessageListener
和 IncomingChatMessageListener
接口工作,因为它们在内部检查 <message>
是否有 <body>
标记(因为 xmpp 协议规则),但该规则不适用XEP-0333:
当接收者发送一个聊天标记时,它应该确保消息节只包含聊天标记子元素和可选的(在适当的时候)一个线程子元素。自然,中间实体可能会在路由或传递接收消息时向消息添加其他扩展元素,例如延迟传递 (XEP-0203) 中指定的元素。
所以我所做的是按照ChatManager
(版本2)和ChatStateManager
的架构和行为改进ChatMarkersManager
类。
以下代码是改进后的代码(我仍然需要 Smack 库人员的反馈),但它可以正常工作:
public final class ChatMarkersManager extends Manager
private static final Map<XMPPConnection, ChatMarkersManager> INSTANCES = new WeakHashMap<>();
// @FORMATTER:OFF
private static final StanzaFilter FILTER = new NotFilter(new StanzaExtensionFilter(ChatMarkersElements.NAMESPACE));
private static final StanzaFilter CHAT_STATE_FILTER = new NotFilter(new StanzaExtensionFilter(ChatStateManager.NAMESPACE));
private static final StanzaFilter MESSAGE_FILTER = new OrFilter(
MessageTypeFilter.NORMAL_OR_CHAT,
MessageTypeFilter.GROUPCHAT
);
private static final StanzaFilter INCOMING_MESSAGE_FILTER = new AndFilter(
MESSAGE_FILTER,
new StanzaExtensionFilter(ChatMarkersElements.NAMESPACE)
);
// @FORMATTER:ON
private final Set<IncomingChatMarkerMessageListener> incomingListeners = new CopyOnWriteArraySet<>();
private final AsyncButOrdered<Chat> asyncButOrdered = new AsyncButOrdered<>();
private ChatMarkersManager(XMPPConnection connection)
super(connection);
connection.addStanzaInterceptor(new StanzaListener()
@Override
public void processStanza(Stanza packet)
throws
SmackException.NotConnectedException,
InterruptedException,
SmackException.NotLoggedInException
Message message = (Message) packet;
if (shouldDiscardMessage(message))
return;
if (message.getBodies().isEmpty())
return;
// if message already has a chatMarkerExtension, then do nothing,
if (!FILTER.accept(message))
return;
// otherwise add a markable extension,
message.addExtension(new ChatMarkersElements.MarkableExtension());
, MESSAGE_FILTER);
connection.addSyncStanzaListener(new StanzaListener()
@Override
public void processStanza(Stanza packet)
throws
SmackException.NotConnectedException,
InterruptedException,
SmackException.NotLoggedInException
final Message message = (Message) packet;
if (shouldDiscardMessage(message))
return;
EntityFullJid fullFrom = message.getFrom().asEntityFullJidIfPossible();
EntityBareJid bareFrom = fullFrom.asEntityBareJid();
final Chat chat = ChatManager.getInstanceFor(connection()).chatWith(bareFrom);
List<IncomingChatMarkerMessageListener> listeners;
synchronized (incomingListeners)
listeners = new ArrayList<>(incomingListeners.size());
listeners.addAll(incomingListeners);
final List<IncomingChatMarkerMessageListener> finalListeners = listeners;
asyncButOrdered.performAsyncButOrdered(chat, new Runnable()
@Override
public void run()
for (IncomingChatMarkerMessageListener listener : finalListeners)
if (ChatMarkersElements.MarkableExtension.from(message) != null)
listener.newMarkableMessage(message);
else if (ChatMarkersElements.ReceivedExtension.from(message) != null)
listener.newReceivedMessage(message);
else if (ChatMarkersElements.DisplayedExtension.from(message) != null)
listener.newDisplayedMessage(message);
else if (ChatMarkersElements.AcknowledgedExtension.from(message) != null)
listener.newAcknowledgedMessage(message);
);
, INCOMING_MESSAGE_FILTER);
ServiceDiscoveryManager.getInstanceFor(connection).addFeature(ChatMarkersElements.NAMESPACE);
/**
* Get the singleton instance of ChatMarkersManager.
*
* @param connection
* @return the instance of ChatMarkersManager
*/
public static synchronized ChatMarkersManager getInstanceFor(XMPPConnection connection)
ChatMarkersManager chatMarkersManager = INSTANCES.get(connection);
if (chatMarkersManager == null)
chatMarkersManager = new ChatMarkersManager(connection);
INSTANCES.put(connection, chatMarkersManager);
return chatMarkersManager;
/**
* Register a IncomingChatMarkerMessageListener. That listener will be informed about new
* incoming markable messages.
*
* @param listener IncomingChatMarkerMessageListener
* @return true, if the listener was not registered before
*/
public boolean addIncomingChatMarkerMessageListener(IncomingChatMarkerMessageListener listener)
synchronized (incomingListeners)
return incomingListeners.add(listener);
/**
* Unregister a IncomingChatMarkerMessageListener.
*
* @param listener IncomingChatMarkerMessageListener
* @return true, if the listener was registered before
*/
public boolean removeIncomingChatMarkerMessageListener(IncomingChatMarkerMessageListener listener)
synchronized (incomingListeners)
return incomingListeners.remove(listener);
public void markMessageAsReceived(String id, Jid to, Jid from, String thread)
throws
SmackException.NotConnectedException,
InterruptedException
Message message = createMessage(id, to, from, thread);
message.addExtension(new ChatMarkersElements.ReceivedExtension(id));
sendChatMarkerMessage(message);
public void markMessageAsDisplayed(String id, Jid to, Jid from, String thread)
throws
SmackException.NotConnectedException,
InterruptedException
Message message = createMessage(id, to, from, thread);
message.addExtension(new ChatMarkersElements.DisplayedExtension(id));
sendChatMarkerMessage(message);
public void markMessageAsAcknowledged(String id, Jid to, Jid from, String thread)
throws
SmackException.NotConnectedException,
InterruptedException
Message message = createMessage(id, to, from, thread);
message.addExtension(new ChatMarkersElements.AcknowledgedExtension(id));
sendChatMarkerMessage(message);
private Message createMessage(String id, Jid to, Jid from, String thread)
Message message = new Message();
message.setStanzaId(id);
message.setTo(to);
message.setFrom(from);
message.setThread(thread);
return message;
private void sendChatMarkerMessage(Message message) throws SmackException.NotConnectedException, InterruptedException
connection().sendStanza(message);
/**
* From XEP-0333, Protocol Format: The Chat Marker MUST have an 'id' which is the 'id' of the
* message being marked.
*
* @param message to be analyzed.
* @return true if the message contains a stanza Id.
* @see <a href="http://xmpp.org/extensions/xep-0333.html">XEP-0333: Chat Markers</a>
*/
private boolean shouldDiscardMessage(Message message)
if (StringUtils.isNullOrEmpty(message.getStanzaId()))
return true;
if (!CHAT_STATE_FILTER.accept(message))
ExtensionElement extension = message.getExtension(ChatStateManager.NAMESPACE);
String chatStateElementName = extension.getElementName();
ChatState state;
try
state = ChatState.valueOf(chatStateElementName);
return !(state == ChatState.active);
catch (Exception ex)
return true;
return false;
/**
* Returns true if Chat Markers is supported by the server.
*
* @return true if Chat Markers is supported by the server.
* @throws SmackException.NotConnectedException
* @throws XMPPException.XMPPErrorException
* @throws SmackException.NoResponseException
* @throws InterruptedException
*/
public boolean isSupportedByServer()
throws SmackException.NoResponseException, XMPPException.XMPPErrorException, SmackException.NotConnectedException, InterruptedException
return ServiceDiscoveryManager.getInstanceFor(connection())
.serverSupportsFeature(ChatMarkersElements.NAMESPACE);
interface
很简单:
public interface IncomingChatMarkerMessageListener
void newMarkableMessage(Message message);
void newReceivedMessage(Message message);
void newDisplayedMessage(Message message);
void newAcknowledgedMessage(Message message);
目前我没有使用Chat
对象,所以我没有通过接口传递它,但可以轻松添加它。其实我想能够处理Chat
和MultiChat。
这可以与 XEP-0085 一起使用,正如 8.5 Interaction with Chat States 中的文档所建议的那样。
就像我在它工作之前所说的那样,遵循协议规则,但我有一些我无法回答的问题,我希望从 Smack 库人员那里得到一些反馈:D
【讨论】:
嗨,你在使用这个 ChatMarkersManager。其实我对使用这个实现很感兴趣,想知道你对此的反馈。适合你吗? 嗨@umerk44!是的,该应用程序使用的版本与此版本非常相似,但有一些改进。您可以在 GitHub 中查看 PR。以上是关于Smack 中的聊天标记 (XEP-0333)的主要内容,如果未能解决你的问题,请参考以下文章