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How can i get the version of Roster
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matianyi 2012-03-23, 10:05 #1
Member since Mar 2012 · 19 posts · Location: Japan
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Subject: How can i get the version of Roster
My Xmpp Server support Roster Version like this:
  1. <iq xmlns="jabber:client" to="user1@legendapl.com/36b083865d8c4a8880556f665a586eb6" type="result" id="MX_3">
  2.  <query xmlns="jabber:iq:roster" ver="2">
  3.     <item jid="user2@legendapl.com" name="User2" subscription="both">
  4.       <group>MyFriends</group>
  5.     </item>
  6.     <item jid="user3@legendapl.com" name="User3" subscription="both">
  7.       <group>MyFriends</group>
  8.     </item>
  9.  </query>
  10. </iq>

i can send the ver with XmppClient.RequestRoster() method, but i dont know how to get the version from the iq result.
This post was edited on 2012-03-26, 08:34 by Alex.
Edit reason: code formatting
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Alex 2012-03-23, 12:38 #2
Member since Feb 2003 · 4449 posts · Location: Germany
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The roster version is in the OnRosterItem event in the EventArgs.

  1. private void xmppClient_OnRosterItem(object sender, Matrix.Xmpp.Roster.RosterEventArgs e)
  2. {
  3.     var version = e.Version;
  4. }

There is an RequestRoster() overload where you can pass the roster version.

  1. xmppClient.RequestRoster(14);

let me know if this helps. I am also open to API changes for this when they make it easier for you.

Normally you set AutoRoster to false and Request  the roster with the version you currently have at any time after login. When the roster changed then the server sends you the changes which you will get in the OnRosterItem event with the new version again.

Alex
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matianyi 2012-03-26, 06:51 #3
Member since Mar 2012 · 19 posts · Location: Japan
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Alex, thank you for your reply.

but, what i got is that the value of e.Version is always null.

i have another workaround method that works: request roster with iq then get roster version and item from the iq result.

  1. var iq = new RosterIq(IqType.get)
  2. {
  3.     Roster =
  4.     {
  5.         Version = m_version
  6.     }
  7. };
  8. m_xmppClient.IqFilter.SendIq(iq, XmppClientOnRoster);
  9.  
  10. private void XmppClientOnRoster(object sender, IqEventArgs e)
  11. {
  12.     var iq = e.Iq;
  13.     if (iq.Type == IqType.result)
  14.     {
  15.         var query = iq.Element<Roster>();
  16.         if (query != null)
  17.         {
  18.             foreach (var rosterItem in query.GetRoster())
  19.             {
  20.                 ...
  21.             }
  22.             m_version = query.Version;
  23.         }
  24.     }
  25. }
This post was edited on 2012-03-26, 08:34 by Alex.
Edit reason: code formatting
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Alex 2012-03-26, 08:35 #4
Member since Feb 2003 · 4449 posts · Location: Germany
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Have you done what I have suggested? Set AutoRoster to false and request the roster manual? MatriX should report the version.
If not then please post a Xml log here.

Alex
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