[jdev] Best practices regarding roster management by clients ?

Peter Saint-Andre stpeter at jabber.org
Thu Sep 8 12:05:59 CDT 2005


Lucas Nussbaum wrote:

> (A) Should a client display contacts with subscription=none or
> subscription=from (and not ask=subscribe) ? You obviously don't care
> about those contacts, and they will never send you any presence, so why
> lose space in your contact list ?

Many clients display "from" contacts as "observers", either in a 
separate group or with a special icon. I haven't seen any clients that 
display "none" contacts but I haven't tried every client out there, either.

> (B) How should clients handle the removal of contacts ? I think that :
> 
> - if sub=both, a presence type=unsubscribe should be sent so
>   subscription becomes from (the fact that you are no longer interested
>   in somebody's presence doesn't mean the other party doesn't want to
>   see your presence anymore). Additionally, the client should ask the
>   user whether he wants to forbid the other party from seeing the user
>   presence (and then send presence with type=unsubscribed)
> 
> - if sub=to, sub=from or sub=none, there's no problem.

If you do a roster remove (RFC 3921, Section 8.6), the server handles 
the presence stuff for you.

Peter

-- 
Peter Saint-Andre
Jabber Software Foundation
http://www.jabber.org/people/stpeter.shtml
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