Justin Karneges wrote:
On Wednesday 30 June 2010 10:40:38 Matthew Wild wrote:
This is the problem. It has frequently been raised that the probes
sent by the user's server can be detected by a contact's server (think
plugins for easily-extensible XMPP servers...) to signal that the user
is invisible.
Have an XMPP server that probes contacts the first time it knows about them,
and on bootup, but never for any other reason. Local user logins would never
trigger probes. All incoming presence is cached indefinitely.
Advantages:
Optimized login times (instant presence for remote contacts, no waiting).
No giving away your availability due to causing probes when you log in.
Disadvantages:
Use lots of memory to cache presence.
On my 10-person server the advantages would outweigh the disadvantages.
Did you ever implement that? Imo it does not work (i.e. the cache is not
reliable due to lost presence stanzas), but I would like to hear a
second opinion.
philipp
