(IOS) ricorsiva richiesta vCard-Temp al server Jabber?

Question

Sto creando un applicazione per iPhone con xmpframework, tutto funziona bene, ma vorrei aggiornare il mio profilo foto con il seguente codice. e ho ottenuto un po 'scorretto ricorsiva richiesta vCard-Temp al server. Ma il quadro ottenuto aggiornato, e notificato tutti gli amici nel mio roster.

//I clicked on the button
-(void)updatevCardButtonClicked{
   XMPPvCardTemp *vCardTemp = [[[self appDelegate] xmppvCardTempModule] myvCardTemp];
   NSLog(@"my vCardTemp: %@", vCardTemp);
   NSData *tempImage = [self getDataFromImage:[self resizeImage:userImage]];
   [vCardTemp setPhoto: tempImage];
   [[[self appDelegate] xmppvCardTempModule]updateMyvCardTemp:vCardTemp];
}

uscita e la spiegazione seguente

my vCardTemp: *nil description*
MyApp[60625:6c1b] XMPPvCardCoreDataStorage: Triggering save (pendingRequests=0)
MyApp[60625:207] MyAppDelegate: xmppStream:didReceiveIQ: - E49C843A-5A05-4148-A4CF-B400062A83C0
MyApp[60625:207] MyAppDelegate: xmppStream:didReceivePresence: - <presence xmlns="jabber:client"    from="myJabberAccount@127.0.0.1/1948110991326183732515886" to="myJabberAccount@127.0.0.1/1948110991326183732515886">
  <status>At  work</status>
  <x xmlns="vcard-temp:x:update">
        <photo>1f6401ddea76826fddc4cd7ddc17741db6c9dabc</photo>
  </x>
  <c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://code.google.com/p/xmppframework" ver="VyOFcFX6+YNmKssVXSBKGFP0BS4="></c>
  <x xmlns="vcard-temp:x:update">
        <photo>c3b2d65259a4fc1d37e56777697d4f5a9730fb03</photo></x><c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://code.google.com/p/xmppframework" ver="VyOFcFX6+YNmKssVXSBKGFP0BS4="></c>
  </presence>
MyApp[60625:5323] XMPPRosterCoreDataStorage: handlePresence:xmppStream:

//repeat start from here, and the DidReceivePresence: will grow into tons of lines with the samthing
MyApp[60625:207] XMPPRosterCoreDataStorage: userForJID:xmppStream:managedObjectContext:
MyApp[60625:1e0b] XMPPRosterCoreDataStorage: userForJID:xmppStream:managedObjectContext:
MyApp[60625:207] XMPPRosterCoreDataStorage: resourceForJID:xmppStream:managedObjectContext:
MyApp[60625:5323] XMPPvCardCoreDataStorage: Triggering save (pendingRequests=0)
MyApp[60625:207] MyAppDelegate: xmppStream:didReceiveIQ: - (null)
MyApp[60625:1e0b] XMPPvCardCoreDataStorage: Triggering save (pendingRequests=0)
MyApp[60625:207] MyAppDelegate: xmppStream:didReceivePresence: - <presence xmlns="jabber:client" from="myJabberAccount@127.0.0.1/1948110991326183732515886" to="myJabberAccount@127.0.0.1/1948110991326183732515886">
 <status>At work</status>
 <x xmlns="vcard-temp:x:update">
     <photo>1f6401ddea76826fddc4cd7ddc17741db6c9dabc</photo>
 </x>
 <c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://code.google.com/p/xmppframework" ver="VyOFcFX6+YNmKssVXSBKGFP0BS4="></c>
 <x xmlns="vcard-temp:x:update">
     <photo>c3b2d65259a4fc1d37e56777697d4f5a9730fb03</photo>
 </x>
 <c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://code.google.com/p/xmppframework" ver="VyOFcFX6+YNmKssVXSBKGFP0BS4="></c>
 <x xmlns="vcard-temp:x:update">
     <photo>c3b2d65259a4fc1d37e56777697d4f5a9730fb03</photo>
 </x>
 <c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://code.google.com/p/xmppframework" ver="VyOFcFX6+YNmKssVXSBKGFP0BS4=">
 </c>
 </presence>

//repeat the above in the rest of the output with more and more "vcard-temp:x:update"

quello che ho trovato finora, la causa di sotto di questo problema, ma non posso capire dove posso risolvere il problema.

//i found that these two "SEND" cause the problem, the app just keep sending these two 
SEND: <iq type="get" to="myJabberAccount@127.0.0.1"><vCard xmlns="vcard-temp"/></iq>
SEND: <presence>
    <x xmlns="vcard-temp:x:update">
        <photo>1f6401ddea76826fddc4cd7ddc17741db6c9dabc</photo>
    </x>
    <c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://code.google.com/p/xmppframework" ver="VyOFcFX6+YNmKssVXSBKGFP0BS4="/>
    <x xmlns="vcard-temp:x:update">
        <photo>1f6401ddea76826fddc4cd7ddc17741db6c9dabc</photo>
    </x>
    <c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://code.google.com/p/xmppframework" ver="VyOFcFX6+YNmKssVXSBKGFP0BS4="/>
    <x xmlns="vcard-temp:x:update">
        <photo>f93ee3918c7baaf095edb9f6bede892c603161af</photo>
    </x>
    <c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://code.google.com/p/xmppframework" ver="VyOFcFX6+YNmKssVXSBKGFP0BS4="/>
    <x xmlns="vcard-temp:x:update">
        <photo>f93ee3918c7baaf095edb9f6bede892c603161af</photo>
    </x>
    <c xmlns="http://jabber.org/protocol/caps" hash="sha-1" node="http://code.google.com/p/xmppframework" ver="VyOFcFX6+YNmKssVXSBKGFP0BS4="/>
</presence>
 //this presence keep growing as you can see the repeated parts

Answer 1

Ho cercato di affrontare questo problema per un bel po 'di tempo. Fatemi sapere se questo funziona per voi. Ecco la mia spiegazione:

Ogni volta che si invia un elemento di presenza tramite xmppStream, memorizza nella cache una copia di esso sotto la variabile di istanza "myPresence".

Se cercate il seguente metodo in XMPPStream.m:

- (void)continueSendElement:(NSXMLElement *)element withTag:(long)tag

v'è un commento su 10-20 linee di basso che dice:

// Update myPresence if this is a normal presence element.
// In other words, ignore presence subscription stuff, MUC room stuff, etc.

Quando la classe XMPPvCardAvatarModule aggiorna il vCard, introduce cose come il tag (capacità) e che inquina il normale elemento presenza.

Per risolvere questo problema, abbiamo bisogno di ripulire i tag inutili. Ecco una parte del mio codice modificato:

else if ([element isKindOfClass:[XMPPPresence class]])
{
    // Update myPresence if this is a normal presence element.
    // In other words, ignore presence subscription stuff, MUC room stuff, etc.

    XMPPPresence *presence = (XMPPPresence *)element;

    // We use the built-in [presence type] which guarantees lowercase strings,
    // and will return @"available" if there was no set type (as available is implicit).

    NSString *type = [presence type];
    if ([type isEqualToString:@"available"] || [type isEqualToString:@"unavailable"])
    {
        NSArray *vCardXElem = [presence elementsForName:@"x"];
        NSArray *capabilitiesHash = [presence elementsForName:@"c"];

        for (NSXMLElement *x in vCardXElem)
        {
            [presence removeChildAtIndex:[x index]];
        }

        for (NSXMLElement *c in capabilitiesHash)
        {
            [presence removeChildAtIndex:[c index]];
        }

        if ([presence toStr] == nil && myPresence != presence)
        {
            myPresence = presence;
        }
    }

    [multicastDelegate xmppStream:self didSendPresence:(XMPPPresence *)element];
}