Hi, I'm thinking about a custom usage of PUBLISH method. The idea is to send a
PUBLISH with body and "Expires: 0" but no "SIP-If-Match" header, so it would
generate a NOTIFY for current subscribers, but since "Expires" is 0 future
subscriptions would not receive such notification (this is what I want to
achieve).
Is it a legal usage of PUBLISH method? In RFC 3903 I read that "Expires: 0" is
used, in conjunction with "SIP-If-Match" header, to terminate an existing
publication:
-----------------------------------------------
To request the immediate removal of event state, an EPA MUST create a
PUBLISH request with an Expires value of "0", and set the SIP-If-
Match header field to contain the entity-tag of the event state
publication to be removed.
Note that removing event state is effectively a publication
refresh suggesting an infinitesimal expiration interval.
Consequently, the refreshed event state expires immediately after
being refreshed.
Similar to an event state refresh, the removal of event state only
affects the expiry of the event state. Therefore, a PUBLISH request
that removes event state MUST NOT contain a body.
-----------------------------------------------
In my case the PUBLISH has body and "Expires: 0" but no "SIP-If-Match" so I
expect is a legal usage. Opinions? Thanks.
--
Iñaki Baz Castillo <[email protected]>
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