That depends on when you want to trigger the notification. The easiest thing to 
do would be to trigger it when one party sends a BYE. The best place to do this 
would probably be after you have relayed the BYE to the UA (in the RELAY route 
after the t_relay() call). This seems most logical as what may be a slow HTTP 
request will not hold up the relaying of the BYE to the UA. The config might 
look something like this:

if (is_method("BYE”)) {
    http_query(……)
}

The call is technically not ended until the BYE has gotten a response. If it’s 
important to you to only trigger on this occurrence, the logic needs to go in 
the MANAGE_REPLY reply route. The logic there is a bit more tricky. You’ll need 
to check for a valid response code as well as ensure it is a response to the 
BYE. Not sure off hand of the code logic, but I’m sure it’s not too tricky.

Having just discussed internally, we’re not aware of any legitimate scenario 
when the response to a BYE changes the originating UA’s decision on whether to 
end the call. Others may be able to advise more on this. As such, it’s probably 
not necessary to trigger your request on the response but rather go with the 
simple option and trigger it when you see a BYE. The only thing to bear in mind 
is that you may see two BYEs for a single call in the event something went awry 
(e.g. UA2 did not receive the BYE from UA1 and thus timed out). You’ll need 
some duplication protection for this.


Phil
From: sr-users [mailto:sr-users-boun...@lists.sip-router.org] On Behalf Of Jay 
Li
Sent: 14 June 2016 16:54
To: sr-users@lists.sip-router.org
Subject: [SR-Users] HTTP query at the end of a phone call

Dear All,

I'd like to send a HTTP call to a HTTP server whenever a call routed through a 
Kamailio server ends. By looking at the document, seems I should use 
http_query() function in the utils module. I wonder which route function I 
should put the http_query()  in assuming we use the default kamailio.cfg. 
Thanks.

Regards,
Jay
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