I've implemented XMPP server using Smack library, my server gets messages from Google Cloud Messaging server (now it is Firebase), but the problem is when I send one by one message from android to gcm server, my XMPP server receives only first message and the second is intercepted, (I can see only notification that there was a message
<message id="gQaM0-6"><gcm xmlns="google:mobile:data">{"message_type":"ack","message_id":"0","to":"eVtypIWW7Q8:APA91bH5oU0AC3zyuCAWVYkMzoGQeIiGe71c2BL4lE5uFHRfB3iPXtD-qIJDmJZ3ySsPDi0VhkKl0Cz3XZG7rWa1Ca7pX9yQqzWSMXBiGK4SEO4Q-Owfr45E_VBJMrXqsSziuJhek"}</gcm></message>
but I don't have data in this and first message I get in method void processPacket(Packet packet) here is the full code of XMPP server:
public class XMPPServer implements PacketListener {
private static XMPPServer sInstance = null;
private XMPPConnection connection;
private ConnectionConfiguration config;
private String mApiKey = null;
private String mProjectId = null;
private boolean mDebuggable = false;
private String fcmServerUsername = null;
public static XMPPServer getInstance() {
if (sInstance == null) {
throw new IllegalStateException("You have to prepare the client first");
}
return sInstance;
}
public static XMPPServer prepareClient(String projectId, String apiKey, boolean debuggable) {
synchronized (XMPPServer.class) {
if (sInstance == null) {
sInstance = new XMPPServer(projectId, apiKey, debuggable);
}
}
return sInstance;
}
private XMPPServer(String projectId, String apiKey, boolean debuggable) {
this();
mApiKey = apiKey;
mProjectId = projectId;
mDebuggable = debuggable;
fcmServerUsername = mProjectId + "@" + Util.FCM_SERVER_CONNECTION;
}
private XMPPServer() {
// Add GcmPacketExtension
ProviderManager.getInstance().addExtensionProvider(Util.FCM_ELEMENT_NAME, Util.FCM_NAMESPACE,
new PacketExtensionProvider() {
@Override
public PacketExtension parseExtension(XmlPullParser parser) throws Exception {
String json = parser.nextText();
GcmPacketExtension packet = new GcmPacketExtension(json);
return packet;
}
});
}
/**
* Connects to FCM Cloud Connection Server using the supplied credentials
*/
public void connect() throws XMPPException {
config = new ConnectionConfiguration(Util.FCM_SERVER, Util.FCM_PORT);
config.setSecurityMode(SecurityMode.enabled);
config.setReconnectionAllowed(true);
config.setSocketFactory(SSLSocketFactory.getDefault());
// Launch a window with info about packets sent and received
config.setDebuggerEnabled(mDebuggable);
connection = new XMPPConnection(config);
connection.connect();
connection.addConnectionListener(new ConnectionListener() {
//a few overrided methods
});
// Handle incoming packets (the class implements the PacketListener)
connection.addPacketListener(this, new PacketTypeFilter(Message.class));
// Second message without data I get in this method (1)
connection.addPacketWriterInterceptor(new PacketInterceptor() {
@Override
public void interceptPacket(Packet packet) {
System.out.println("INTERCEPT PACKAGE: " + packet.toXML());
}
}, new PacketTypeFilter(Message.class));
connection.login(fcmServerUsername, mApiKey);
}
/**
* Normal message with my data I get in this method (2)
*/
@SuppressWarnings("unchecked")
@Override
public void processPacket(Packet packet) {
Message incomingMessage = (Message) packet;
GcmPacketExtension gcmPacket = (GcmPacketExtension) incomingMessage.getExtension(Util.FCM_NAMESPACE);
String json = gcmPacket.getJson();
System.out.println("Message : " + json);
}
There is almost the whole code, the most important part I marked with (1) and (2), (use search to find quickly) Why can I receive only first message with my data ? And why does the second message go to PacketInterceptor (mark (1) ) ?
