[SR-Users] Doing automatic unregister when a WEBSOCKET connection is closed.

[Juha Heinanen]

Daniel-Constantin Mierla writes:

> For db only the sql query can be done only on ruid (for update and 
> delete), there is a parameter for that now.

yes, but at least in case of unregister, the implementation is
inefficient, because before calling delete, it needs to call
get:

		if (ul.get_urecord_by_ruid_d, ul.get_aorhash(&aor),
				_ruid, &r, &c) != 0) {
			LM_WARN("AOR/Contact not found\n");
			return -1;
		}
		if (ul.delete_ucontact(r, c) != 0) {
			LM_WARN("could not delete contact\n");
			return -1;
		}

that results in two db queries instead of one.  another disadvantage is
that aor needs to be available when unregister is called.

i'm currently testing new version of unregister that (if uri param is
empty string), calls new ul api function delete_urecord_by_ruid.

once i get it tested, i would like to commit the code, because then
unregister can be done more efficiently and without knowing what the aor
is.

-- juha