[jdev] Presence - how often?
dave at cridland.net
Thu Dec 11 02:06:13 CST 2008
On Thu Dec 11 07:33:27 2008, Yann Leboulanger wrote:
> Adi wrote:
> > How often should a client send xmpp presence to a server? I
> assume most
> > XMPP servers usually have a timeout for client idle and the
> > should be sent at a value that is less than this timeout to be
> > But if you are talking to some third party xmpp server, you
> wouldnt know
> > their client idle timeout setting, so how do we optimize sending
> > presence? -
> There is XMPP Ping for this: XEP-0199
> We send such a ping after 55sec of inactivity and wait for the
> for 20 seconds before assuming we are disconnected
(Which tends to break my connection when I'm on the mobile, but I
found out how to turn it off).
We (Isode) send whitespace after a minute of "dead air" (both
directions), a XEP-0199 ping if the client has been silent for 5
minutes, and that in turn has a 2 minute timeout. (Hence we actually
send two pings before we disconnect - arguably a bug, but not one I'm
motivated to do anything about).
In trunk, we also send an immediate ping with a 10 second timeout to
the "old" session in a conflict pair - ie, if a new session wishes to
use the same resource, we ping the old one to see if it's still
responding before deciding what to do.
Dave Cridland - mailto:dave at cridland.net - xmpp:dwd at dave.cridland.net
Infotrope Polymer - ACAP, IMAP, ESMTP, and Lemonade
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