[Standards] Bind 2.0 and Best Practices for Handling Offline Messages interoperability

Kevin Smith kevin.smith at isode.com
Fri Feb 24 09:25:27 UTC 2017


Hi Michal,

On 24 Feb 2017, at 08:31, Michal Piotrowski <michal.piotrowski at erlang-solutions.com> wrote:
> XEP-0386: Bind 2.0 spec says:
> 
> > Clear the offline messages for this user, if any, without sending them (as they will be provided by MAM).
> 
> XEP-0160: Best Practices for Handling Offline Messages says:
> 
> > When the recipient next sends non-negative available presence to the server, the server delivers the message to the resource that has sent that presence.
> 
> Also the "non-negative" available presence is to my understanding a initial presence sent by the client after bind. Should we assume that doing Bind 2.0 client already has a resource with "non-negative" available presence? Or how do you imagine interoperability of Bind 2.0 and Best Practices for Handling Offline Messages?
> 
> I just would like to be clear about a following scenario:
> 
> 1. Client A does Bind 2.0
> 2. The server clears offline messages for this client A and delivers unread as described in Bind 2.0

Offline message stores are per-account, rather than per-client, so it clears the offline messages for the account, but yes.

> 3. Client B sends messages to client A
> 4. Client A sends its initial presence. To my understanding only after this point the server can deliver messages to the client's resource.

Depending whether they’re full-JID or bare-JID messages, but yes. 

Maybe initial presence should also be wrapped up inside bind2?

> I'd gladly hear what I missed. 

Nothing, I think.

/K


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