Question

我为OpenFire XMPP服务器开发了一个VCard插件，主要目的是通过HTTP请求创建/更新和检索用户的头像。不幸的是，插件没有按预期工作 - VCard更改被传播到数据库（ofVcard表），但是userpic未被更新的用户和他的伙伴都没有看到刷新的图像。以下是我创建/更新VCards的方法：

   ...
   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头像（我们使用的是Jitsi）时，更改不仅会立即存储在数据库中，而且所有好友都会获得刷新后的图像。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。

我无法弄清楚setVcard中handleIQ(IQ packet)方法与IQvCardHandler中{{1}}方法之间的区别。我错过了什么？

Answer 1

好的，我会自己回答我的问题 - 也许有人会发现这些信息有用。

事实证明，并不像将图片存储到数据库那么简单。预计会在相关各方之间进行消息交换。此交换的关键部分是客户端发送的状态更新，通知服务器及其所有好友他的新配置文件图像。有关详细信息，请参阅XEP-0153: vCard-Based Avatars。这是一段代码，它“模拟”将发送给所有用户的好友的状态更新：

    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PresenceUpdateHandler类中稍微调整过的方法：

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());
    }
}

为了调试OpenFire问题，我强烈建议在调试模式下在本地运行它 - 请参阅此处的说明：2。请注意，较新的eclipse版本没有来自现有源的Create项目，但您必须单击New - ＆gt;单击Java Project，取消选中Use default location复选框，然后浏览到项目位置。

在OpenFire中刷新VCards

1 个答案: