我正在使用下面的类在我们的 ejabberd 服务器中启用流管理（“urn:xmpp:sm:3”）（我们有最新版本的 ejabberd）。但是当我将启用数据包发送到服务器时，它显示服务不可用（503）。但是当我使用“yaxim”时，它可以完美运行。请帮我解决这个问题。谢谢。
public class XmppStreamHandler {
public static final String URN_SM_3 = "urn:xmpp:sm:3";
private static final int MAX_OUTGOING_QUEUE_SIZE = 20;
private static final int OUTGOING_FILL_RATIO = 4;
private XMPPConnection mConnection;
private boolean isSmAvailable = false;
private boolean isSmEnabled = false;
private boolean isOutgoingSmEnabled = false;
private long previousIncomingStanzaCount = -1;
private String sessionId;
private long incomingStanzaCount = 0;
private long outgoingStanzaCount = 0;
private Queue<Packet> outgoingQueue;
private int maxOutgoingQueueSize = MAX_OUTGOING_QUEUE_SIZE;
private ConnectionListener mConnectionListener;
public XmppStreamHandler(XMPPConnection connection, ConnectionListener connectionListener) {
mConnection = connection;
mConnectionListener = connectionListener;
startListening();
}
/** Perform a quick shutdown of the XMPPConnection if a resume is possible */
public void quickShutdown() {
if (isResumePossible()) {
mConnection.quickShutdown();
// We will not necessarily get any notification from a quickShutdown, so adjust our state here.
closeOnError();
} else {
mConnection.shutdown();
}
}
public void setMaxOutgoingQueueSize(int maxOutgoingQueueSize) {
this.maxOutgoingQueueSize = maxOutgoingQueueSize;
}
public boolean isResumePossible() {
return sessionId != null;
}
public boolean isResumePending() {
return isResumePossible() && !isSmEnabled;
}
public static void addExtensionProviders() {
addSimplePacketExtension("sm", URN_SM_3);
addSimplePacketExtension("r", URN_SM_3);
addSimplePacketExtension("a", URN_SM_3);
addSimplePacketExtension("enabled", URN_SM_3);
addSimplePacketExtension("resumed", URN_SM_3);
addSimplePacketExtension("failed", URN_SM_3);
}
public void notifyInitialLogin() {
if (sessionId == null && isSmAvailable)
sendEnablePacket();
}
private void sendEnablePacket() {
debug("sm send enable " + sessionId);
if (sessionId != null) {
isOutgoingSmEnabled = true;
// TODO binding
StreamHandlingPacket resumePacket = new StreamHandlingPacket("resume", URN_SM_3);
resumePacket.addAttribute("h", String.valueOf(previousIncomingStanzaCount));
resumePacket.addAttribute("previd", sessionId);
mConnection.sendPacket(resumePacket);
} else {
outgoingStanzaCount = 0;
outgoingQueue = new ConcurrentLinkedQueue<Packet>();
isOutgoingSmEnabled = true;
StreamHandlingPacket enablePacket = new StreamHandlingPacket("enable", URN_SM_3);
enablePacket.addAttribute("resume", "true");
mConnection.sendPacket(enablePacket);
}
}
private void closeOnError() {
if (isSmEnabled && sessionId != null) {
previousIncomingStanzaCount = incomingStanzaCount;
}
isSmEnabled = false;
isOutgoingSmEnabled = false;
isSmAvailable = false;
}
private void startListening() {
mConnection.forceAddConnectionListener(new ConnectionListener() {
public void reconnectionSuccessful() {
}
public void reconnectionFailed(Exception e) {
}
public void reconnectingIn(int seconds) {
}
public void connectionClosedOnError(Exception e) {
if (e instanceof XMPPException &&
((XMPPException)e).getStreamError() != null) {
// Non-resumable stream error
close();
} else {
// Resumable
closeOnError();
}
}
public void connectionClosed() {
previousIncomingStanzaCount = -1;
}
});
mConnection.addPacketSendingListener(new PacketListener() {
public void processPacket(Packet packet) {
// Ignore our own request for acks - they are not counted
if (!isStanza(packet)) {
trace("send " + packet.toXML());
return;
}
if (isOutgoingSmEnabled && !outgoingQueue.contains(packet)) {
outgoingStanzaCount++;
outgoingQueue.add(packet);
trace("send " + outgoingStanzaCount + " : " + packet.toXML());
// Don't let the queue grow beyond max size. Request acks and drop old packets
// if acks are not coming.
if (outgoingQueue.size() >= maxOutgoingQueueSize / OUTGOING_FILL_RATIO) {
mConnection.sendPacket(new StreamHandlingPacket("r", URN_SM_3));
}
if (outgoingQueue.size() > maxOutgoingQueueSize) {
// Log.e(XmppConnection.TAG, "not receiving acks? outgoing queue full");
outgoingQueue.remove();
}
} else if (isOutgoingSmEnabled && outgoingQueue.contains(packet)) {
outgoingStanzaCount++;
trace("send DUPLICATE " + outgoingStanzaCount + " : " + packet.toXML());
} else {
trace("send " + packet.toXML());
}
}
}, new PacketFilter() {
public boolean accept(Packet packet) {
return true;
}
});
mConnection.addPacketListener(new PacketListener() {
public void processPacket(Packet packet) {
if (isSmEnabled && isStanza(packet)) {
incomingStanzaCount++;
trace("recv " + incomingStanzaCount + " : " + packet.toXML());
} else {
trace("recv " + packet.toXML());
}
if (packet instanceof StreamHandlingPacket) {
StreamHandlingPacket shPacket = (StreamHandlingPacket) packet;
String name = shPacket.getElementName();
if ("sm".equals(name)) {
debug("sm avail");
isSmAvailable = true;
if (sessionId != null)
sendEnablePacket();
} else if ("r".equals(name)) {
StreamHandlingPacket ackPacket = new StreamHandlingPacket("a", URN_SM_3);
ackPacket.addAttribute("h", String.valueOf(incomingStanzaCount));
mConnection.sendPacket(ackPacket);
} else if ("a".equals(name)) {
long ackCount = Long.valueOf(shPacket.getAttribute("h"));
removeOutgoingAcked(ackCount);
trace(outgoingQueue.size() + " in outgoing queue after ack");
} else if ("enabled".equals(name)) {
incomingStanzaCount = 0;
isSmEnabled = true;
mConnection.getRoster().setOfflineOnError(false);
String resume = shPacket.getAttribute("resume");
if ("true".equals(resume) || "1".equals(resume)) {
sessionId = shPacket.getAttribute("id");
}
debug("sm enabled " + sessionId);
} else if ("resumed".equals(name)) {
debug("sm resumed");
incomingStanzaCount = previousIncomingStanzaCount;
long resumeStanzaCount = Long.valueOf(shPacket.getAttribute("h"));
// Removed acked packets
removeOutgoingAcked(resumeStanzaCount);
trace(outgoingQueue.size() + " in outgoing queue after resume");
// Resend any unacked packets
for (Packet resendPacket : outgoingQueue) {
mConnection.sendPacket(resendPacket);
}
// Enable only after resend, so that the interceptor does not
// queue these again or increment outgoingStanzaCount.
isSmEnabled = true;
// Re-notify the listener - we are really ready for packets now
// Before this point, isSuspendPending() was true, and the listener should have
// ignored reconnectionSuccessful() from XMPPConnection.
mConnectionListener.reconnectionSuccessful();
} else if ("failed".equals(name)) {
// Failed, shutdown and the parent will retry
debug("sm failed");
mConnection.getRoster().setOfflineOnError(true);
mConnection.getRoster().setOfflinePresences();
sessionId = null;
mConnection.shutdown();
// isSmEnabled / isOutgoingSmEnabled are already false
}
}
}
}, new PacketFilter() {
public boolean accept(Packet packet) {
return true;
}
});
}
private void removeOutgoingAcked(long ackCount) {
if (ackCount > outgoingStanzaCount) {
// Log.e(XmppConnection.TAG,
// "got ack of " + ackCount + " but only sent " + outgoingStanzaCount);
// Reset the outgoing count here in a feeble attempt to re-sync. All bets
// are off.
outgoingStanzaCount = ackCount;
}
int size = outgoingQueue.size();
while (size > outgoingStanzaCount - ackCount) {
outgoingQueue.remove();
size--;
}
}
private static void addSimplePacketExtension(final String name, final String namespace) {
ProviderManager.getInstance().addExtensionProvider(name, namespace,
new PacketExtensionProvider() {
public PacketExtension parseExtension(XmlPullParser parser) throws Exception {
StreamHandlingPacket packet = new StreamHandlingPacket(name, namespace);
int attributeCount = parser.getAttributeCount();
for (int i = 0; i < attributeCount; i++) {
packet.addAttribute(parser.getAttributeName(i),
parser.getAttributeValue(i));
}
return packet;
}
});
}
private void debug(String message) {
System.out.println(message);
}
private void trace(String message) {
System.out.println(message);
}
public static class StreamHandlingPacket extends UnknownPacket {
private String name;
private String namespace;
Map<String, String> attributes;
StreamHandlingPacket(String name, String namespace) {
this.name = name;
this.namespace = namespace;
attributes = Collections.emptyMap();
}
public void addAttribute(String name, String value) {
if (attributes == Collections.EMPTY_MAP)
attributes = new HashMap<String, String>();
attributes.put(name, value);
}
public String getAttribute(String name) {
return attributes.get(name);
}
public String getNamespace() {
return namespace;
}
public String getElementName() {
return name;
}
public String toXML() {
StringBuilder buf = new StringBuilder();
buf.append("<").append(getElementName());
// TODO Xmlns??
if (getNamespace() != null) {
buf.append(" xmlns=\"").append(getNamespace()).append("\"");
}
for (String key : attributes.keySet()) {
buf.append(" ").append(key).append("=\"")
.append(StringUtils.escapeForXML(attributes.get(key))).append("\"");
}
buf.append("/>");
return buf.toString();
}
}
/** Returns true if the packet is a Stanza as defined in RFC-6121 - a Message, IQ or Presence packet. */
public static boolean isStanza(Packet packet) {
if (packet instanceof Message)
return true;
if (packet instanceof IQ)
return true;
if (packet instanceof Presence)
return true;
return false;
}
public void queue(Packet packet) {
if (outgoingQueue.size() >= maxOutgoingQueueSize) {
System.out.println("outgoing queue full");
return;
}
outgoingStanzaCount++;
outgoingQueue.add(packet);
}
private void close() {
isSmEnabled = false;
isOutgoingSmEnabled = false;
sessionId = null;
}
}