Hi, the way a presence server receives notifications for changes in XCAP
documents (so it can notify the watchers) is by subscribing to the XCAP server
for the event "xcap-diff" as specified in:
http://tools.ietf.org/html/draft-ietf-sip-xcapevent
I would like to understand how such SUBSCRIBE sent by the presence server
looks. The above draft just shows examples when a SIP user send such SUBSCRIBE
but no one example when the subscriber is the presence server.
For example, let's imagine a simplified case in which there are just two XCAP
applications ("pres-rules" and "resource-lists").
The presence server should subscribe to users documents. AFAIK the presence
server would send a SUBSCRIBE as follows:
SUBSCRIBE sip:[email protected] SIP/2.0
From: sip:[email protected]
Accept: application/xcap-diff+xml
Event: xcap-diff; diff-processing=no-patching
Content-Type: application/resource-lists+xml
<?xml version="1.0" encoding="UTF-8"?>
<resource-lists xmlns="urn:ietf:params:xml:ns:resource-lists">
<list>
<entry uri="pres-users/users/" />
<entry uri="resource-lists/users/" />
</list>
</resource-lists>
Then when any user creates or modifies a XCAP document for those auids, then
XCAP server would sent a NOTIFY to the presence-server telling the document
addition/modification.
Doubts:
- Is the above correct? (is it defined somewhere?)
- Most probably the presence-server is just interested in "index" documents
for both XCAP applications. However it would receive notifications for every
document created by any user even if it's not called "index". Is it the
expected behavior? How to ask in the SUBSCRIBE that there is only interest on
"index" called documents?
- Could the notification from the XCAP server to the presence server work with
PUBLISH rather than SUBSCRIBE & NOTIFY? This is: when a XCAP document is
modified the XCAP server sends a PUBLISH to the presence server with xcap-diff
body. Does it make sense?
- And last question. Are all my questions defined in IETF docs? or do they
require specifications on top of IETF docs as OMA specs?
Thanks a lot and best regards.
--
Iñaki Baz Castillo <[email protected]>
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