Java 在OpenFire中刷新vCard

我为OpenFireXMPP服务器开发了一个VCard插件，主要目的是通过HTTP请求创建/更新和检索用户的化身。不幸的是，插件没有按预期工作-VCard更改被分发到数据库（

ofVcard

table），但是用户pic被更新的用户和他的伙伴都看不到刷新的图像。以下是我如何创建/更新vCard：

   ...
   XMPPServer server = XMPPServer.getInstance();
   VCardManager vcardManager = server.getVCardManager();

public void createOrUpdateVcard(String username, String vcard)
                              throws Exception {
                    SAXReader reader = new SAXReader();
                    reader.setValidation(false);
                    // convert String into InputStream
                    InputStream is = new ByteArrayInputStream(vcard.getBytes());
                    // read it with BufferedReader
                    BufferedReader br = new BufferedReader(new InputStreamReader(is));

                    try {
                              // Reading malformed XML will lead to DocumentException
                              Document document = reader.read(is);
                              Element vCardElement = document.getRootElement();
                              log.info("Username: " + username);
                              vcardManager.setVCard(username, vCardElement);
                    } catch (DocumentException e) {
                              throw new MalformedXmlException(e);
                    }
     }
     ...

当我直接从客户端更改化身时（我们使用的是Jitsi），更改不仅会立即存储在数据库中，而且所有好友都会得到刷新的图像。我看到我使用的

VCardManager

，在内部调度事件：

VCardEventDispatcher.dispatchVCardUpdated(username, newvCard);

但它们似乎没有任何效果

---

我无法找出从

IQvCardHandler

中的

handleIQ（IQ数据包）

调用

setVcard

方法的方式与我自己的代码之间的区别。我遗漏了什么？

好的，我会自己回答我的问题-也许有人会觉得这些信息很有用

事实证明，这并不像仅仅将一张图片存储到数据库中那么简单。预计相关方之间会发生消息交换。此交换的关键部分是，有一个状态更新，由客户端发送，该更新将通知服务器，从而通知其所有好友有关其新的配置文件映像。有关详细信息，请参阅。这是一段“模拟”状态更新的代码，将发送给用户的所有好友：

    public void createOrUpdateVcard(String username, String vcard)
        throws MalformedXmlException, UserNotFoundException, SetVcardException {
    SAXReader reader = new SAXReader();
    reader.setValidation(false);
    InputStream is = new ByteArrayInputStream(vcard.getBytes());

    try {
        // Reading malformed XML will lead to DocumentException
        Document document = reader.read(is);
        Element vCardElement = document.getRootElement();
        //Checking that the user exists
        User user = userManager.getUser(username);
        //This might be redundant
        String userUsername = user.getUsername();
        log.debug("Setting VCard for " + userUsername);
        //Storing vCard into the database
        VCardManager.getInstance().setVCard(userUsername, vCardElement);        


        Presence presence = new Presence();
        JID userJID = server.createJID(username, null);
        presence.setFrom(userJID);
        presence.setStatus("");
        presence.setPriority(30);

        Element xElement = presence.addChildElement("x", "vcard-temp:x:update");
        Element photoElement = xElement.addElement("photo");

        SecureRandom random = new SecureRandom();
                    //We do not care about the actual hash - just push updates every time
        String fakeHash = new BigInteger(130, random).toString(32);
        photoElement.setText(fakeHash);

        Element cElement = presence.addChildElement("c", "http://jabber.org/protocol/caps");
        cElement.addAttribute( "ext", "voice-v1 video-v1 camera-v1" )
        .addAttribute("hash", "sha-1");

        System.out.println("SENDING PRESENCE UPDATE:\n" + presence.toXML());
        broadcastUpdate(presence);

    } catch (DocumentException e) {
        throw new MalformedXmlException(e);
    }catch (UserNotFoundException e){
        throw new UserNotFoundException();
    } catch (Exception e){
        //Unfortunately setVCard method above just throws Exception.
        //This catch block is for wrapping it up
        throw new SetVcardException();
    }
}

这是从PresenceUpdateHandler类中稍微调整的方法：

private void broadcastUpdate(Presence update) {
    if (update.getFrom() == null) {
        return;
    }
    if (localServer.isLocal(update.getFrom())) {
        // Do nothing if roster service is disabled
        if (!RosterManager.isRosterServiceEnabled()) {
            return;
        }
        // Local updates can simply run through the roster of the local user
        String name = update.getFrom().getNode();
        try {
            if (name != null && !"".equals(name)) {
                Roster roster = rosterManager.getRoster(name);
                roster.broadcastPresence(update);
            }
        }
        catch (UserNotFoundException e) {
            log.warn("Presence being sent from unknown user " + name, e);
        }
        catch (PacketException e) {
            log.error(LocaleUtils.getLocalizedString("admin.error"), e);
        }
    }
    else {
        // Foreign updates will do a reverse lookup of entries in rosters
        // on the server
        log.warn("Presence requested from server "
                + localServer.getServerInfo().getXMPPDomain()
                + " by unknown user: " + update.getFrom());
    }
}

---

对于调试OpenFire问题，我强烈建议在调试模式下本地运行它-请参阅此处的说明：。请注意，较新的eclipse版本没有从现有源代码创建项目，但是您必须单击New->Java project，取消选中Use default location复选框并浏览到项目位置。

好的，我会自己回答我的问题-也许有人会觉得这些信息很有用

事实证明，这并不像仅仅将一张图片存储到数据库中那么简单。预计相关方之间会发生消息交换。此交换的关键部分是，有一个状态更新，由客户端发送，该更新将通知服务器，从而通知其所有好友有关其新的配置文件映像。有关详细信息，请参阅。这是一段“模拟”状态更新的代码，将发送给用户的所有好友：

    public void createOrUpdateVcard(String username, String vcard)
        throws MalformedXmlException, UserNotFoundException, SetVcardException {
    SAXReader reader = new SAXReader();
    reader.setValidation(false);
    InputStream is = new ByteArrayInputStream(vcard.getBytes());

    try {
        // Reading malformed XML will lead to DocumentException
        Document document = reader.read(is);
        Element vCardElement = document.getRootElement();
        //Checking that the user exists
        User user = userManager.getUser(username);
        //This might be redundant
        String userUsername = user.getUsername();
        log.debug("Setting VCard for " + userUsername);
        //Storing vCard into the database
        VCardManager.getInstance().setVCard(userUsername, vCardElement);        


        Presence presence = new Presence();
        JID userJID = server.createJID(username, null);
        presence.setFrom(userJID);
        presence.setStatus("");
        presence.setPriority(30);

        Element xElement = presence.addChildElement("x", "vcard-temp:x:update");
        Element photoElement = xElement.addElement("photo");

        SecureRandom random = new SecureRandom();
                    //We do not care about the actual hash - just push updates every time
        String fakeHash = new BigInteger(130, random).toString(32);
        photoElement.setText(fakeHash);

        Element cElement = presence.addChildElement("c", "http://jabber.org/protocol/caps");
        cElement.addAttribute( "ext", "voice-v1 video-v1 camera-v1" )
        .addAttribute("hash", "sha-1");

        System.out.println("SENDING PRESENCE UPDATE:\n" + presence.toXML());
        broadcastUpdate(presence);

    } catch (DocumentException e) {
        throw new MalformedXmlException(e);
    }catch (UserNotFoundException e){
        throw new UserNotFoundException();
    } catch (Exception e){
        //Unfortunately setVCard method above just throws Exception.
        //This catch block is for wrapping it up
        throw new SetVcardException();
    }
}

这是从PresenceUpdateHandler类中稍微调整的方法：

private void broadcastUpdate(Presence update) {
    if (update.getFrom() == null) {
        return;
    }
    if (localServer.isLocal(update.getFrom())) {
        // Do nothing if roster service is disabled
        if (!RosterManager.isRosterServiceEnabled()) {
            return;
        }
        // Local updates can simply run through the roster of the local user
        String name = update.getFrom().getNode();
        try {
            if (name != null && !"".equals(name)) {
                Roster roster = rosterManager.getRoster(name);
                roster.broadcastPresence(update);
            }
        }
        catch (UserNotFoundException e) {
            log.warn("Presence being sent from unknown user " + name, e);
        }
        catch (PacketException e) {
            log.error(LocaleUtils.getLocalizedString("admin.error"), e);
        }
    }
    else {
        // Foreign updates will do a reverse lookup of entries in rosters
        // on the server
        log.warn("Presence requested from server "
                + localServer.getServerInfo().getXMPPDomain()
                + " by unknown user: " + update.getFrom());
    }
}

对于调试OpenFire问题，我强烈建议在调试模式下本地运行它-请参阅此处的说明：。请注意，较新的eclipse版本没有从现有源创建项目，但是您必须单击New->Java project，取消选中Use default location复选框并浏览到项目位置