[JDEV] Re: Ping protocol for Jabber

[Trejkaz Xaoza]

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On Wed, 7 Jan 2004 00:06, maqi at jabberstudio.org wrote:
> A solution would be to modify the server to store *any* message for a user X
> until something gets received from the c2s connection of user X or he logs
> off. This should implement at-least-once semantics in contrary to
> at-most-once semantics at the moment.

With luck a change like this might only require changing the offline message 
module.  It does somewhat break the semantics of offline messages a little, 
instead of getting no message you might potentially get many copies of the 
same message.  Usually harmless, but amusing if the message contained the 
body, "What?" or something similar. :-)

If message events (client confirming receipt) ever become widespread, _that_ 
would be a better way to go about it.  At the very least you can detect if a 
resource supports them as soon as it sends a message, and use that 
information to provide more reliable transport.

Anyone up for the task? ;-)

TX

- -- 
'Every sufficiently advanced technology is indistinguishable from magic' - 
Arthur C Clarke
'Every sufficiently advanced magic is indistinguishable from technology' - Tom 
Graves

      Email: Trejkaz Xaoza <trejkaz at xaoza.net>
   Web site: http://xaoza.net/trejkaz/
  Jabber ID: trejkaz at jabber.xaoza.net
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