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[13:56:34] <Michael> hey all, I've a question regarding "best practice". Currently when I display a conversation between user A and B I send a presence stanza to my bare jid with a custom extension added to it with the JID of the participant. This is done in order to notify all loggedin sessions that the specified conversation has been read.
[13:57:02] <Michael> Is this a good way to achieve this or should I use instead a IQ stanza or maybe some stanza using PEP?
[13:57:50] <Kev> Using a presence stanza for that seems to be reasonably smart.
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[14:19:09] <Michael> I just see from time to time (don't really now why yet) that those presence stanzas with extension added to iz are being sent again with a delay-node in them (so something like offline presence stuff).. currently I just don't care about them but I wonder if I could somehow prevent this :)
[14:19:24] <MattJ> Using Gmail?
[14:21:23] <Kev> Gmail does some broken things with presence.
[14:21:34] <Kev> If it's your jabber.org account, that shouldn't be happening.
[14:21:36] <Kev> Ah, wait.
[14:21:45] <Kev> You're sending to your own bare JID
[14:21:56] <Kev> Which is equivalent to sending with no to. Which is broadcast presence.
[14:22:09] <Kev> So this isn't going to work right.
[14:22:12] <ralphm> that seems bad
[14:24:44] <Michael> hmm ok
[14:24:44] <Michael> no it's using my own servers
[14:25:31] <ralphm> Michael: if I understand it correctly, you are basically broadcasting whoever you are chatting with to all of your contacts
[14:25:59] <deryni> Will the custom extension be propagated on presence?
[14:26:05] <ralphm> sure
[14:26:36] <Michael> hmm well the intention was that it's sent to all sessions opened with the same user (that's why I chose to send it to my own bare jid)
[14:26:52] <ralphm> Michael: unfortunately (for you) it doesn't work like that
[14:27:21] <Michael> I don't use roster atm yet so I won't have any contacts yet, but obviously this might lead to a privacy issue if sending to the own bare jid equals sending a broadcast to all contacts _|
[14:27:22] <Michael> :|
[14:27:29] <ralphm> sending presence without a to attribute is equivalent to sending presence with a to attribute holding your own bare JID
[14:27:40] <Michael> hmm, ok I understand
[14:28:14] <Michael> so bad things will happen ;) well then how to fix this issue? I think therefore I can't use the presence stanza at all for this
[14:28:27] <Michael> and would need to use IQ (?) or PEP for this?
[14:29:28] <Kev> I'd use a message, probably.
[14:29:36] <ralphm> Yeah
[14:29:42] <Kev> You'll have to iterate over all your resources (unless you're using carbons).
[14:30:49] <Michael> i'm using carbons but not for BOSH connections (only native connections and websocket connections) because there seems some issue with IE and bosh and carbons :(
[14:31:04] <Michael> hm
[14:31:58] <Michael> but when I send a message to my bare jid and all resources have the same presence priority it should work as well.. or is this a wrong guess?
[14:32:09] <Kev> No, that's not guaranteed.
[14:32:17] <Kev> Might happen, might not.
[14:32:20] <Michael> ok
[14:32:44] <ralphm> Michael: servers are free to choose how to distribute messages sent to the bare JID
[14:33:13] <ralphm> e.g. Google sends it to all resources
[14:33:27] <ralphm> but other servers only to one
[14:33:29] <Michael> so it might be helpful to know how ejabberd handles this.. but relying on this isn't really best practice
[14:33:46] <ralphm> indeed
[14:36:45] <Kev> Michael: Given it could change from version to version, you really shouln't rely on it.
[14:37:10] <Kev> You do know all of your resources, though, so iterating over them isn't much of a hardship.
[14:40:33] <Michael> I know them because all of them send me a presence stanza when I connect, correct?
[14:41:41] <Michael> question is if I could (ab)use PEP for this. According to the spec I've just read it seems that when a user publishes an event it will be distributed to all connected resources
[14:42:19] <Michael> if I restrict now the access model to that only the own user can receive those PEP events, it should work as well
[14:43:09] <Michael> (I'm thinking about this because we'd need to implement the resource caching on every client which requires quite some changes :))
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[14:46:34] <Michael> hmm but using PEP would mean that the last published item would be distributed on connection again .. which is bad
[14:47:03] <MattJ> Same with presence
[14:51:13] <Michael> ok well so I will think about how to do it the best way using your answers. Thanks a lot!
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