[jdev] MUC Presence: force history even if already joined

[Kim Alvefur]

On ons 26 mar 2014 19:05:17, Dave Cridland <dave at cridland.net> wrote:
> On 26 Mar 2014 17:49, "Daniel Dormont" <dan at greywallsoftware.com> wrote:
> > I have a use case where I would like to send a presence to a MUC that
> > I may have already joined and, even if I have, I want it to send me
> > the message history no matter what. Is there a way to do that or would
> > it require a protocol extension of some sort?
> 
> Yes and no.
> 
> Technically speaking, simply sending presence to a MUC and joining (thus
> getting the history and participants) are not the same thing. Sending a
> proper MUC join (with the <x/> and the history control optionally inside
> it) to M-Link[*] will, therefore, give you the history you asked for, and
> all the occupant presence, even if you're already in the room.
> 
> I find this *extremely* useful - which is why I did things that way. A
> use-case for this is where an S2S link is down when you reconnect your
> C2S, or the server crashes, or ... - all arguably edge cases, but
> they're solved very nicely this way.
> 
> Other servers don't do this, though - I think they should.
> 
> If you wanted to avoid the occupant presence, you'd want an extension
> which signalled this in much the same way that the history controls work.
> 
> Dave.
> -- 
> * - Note that I left Isode over a year ago and so may well be out of
> date.

Or MAM?