[Freeswitch-users] How to track call changes while running javascript?

[Thomas]

Answering my own question for the record and the search engines:

Prequesites were:
- Block call progress during ringing until Javascript finishes
- Be able to register and act upon hangups from the a-leg
- Script should only execute once, not a second time for the b-leg

These things seem to vary between the different execute_* options. The one that does exactly what we needed was 
execute_on_pre_answer. That will run only once on the a-leg, will not proceed until JS terminates, and enables both 
hangupHook and session.ready.


On 05.08.2015 14:56, Thomas wrote:
> It looks like the problem is the JS running before the call gets bridged. Is there any way to register a hangup in JS 
> before bridging?
>
> Since that JS is part of the call setup, it has to run before the bridge. :/
>
> On 04.08.2015 11:49, Thomas wrote:
>> It's regular JS sleeps blocking, but I tried the sleep dialplan app (from JS), too - same thing. I tried 
>> session.ready but it does not change if the SIP leg hangs up. The whole process establishes the call, so it 
>> terminates once that is done, it's the actual dialing process through a socket on another device. But the socket 
>> isn't blocking. That was my first guess and I worked around it.
>>
>>
>> On 02.08.2015 18:11, Michael Jerris wrote:
>>> what is it blocking on in the js?  are you using session.ready?
>>>
>>> On Sunday, August 2, 2015, Thomas <lists at virtues.net <mailto:lists at virtues.net>> wrote:
>>>
>>>     They both don't change/fire. :/ It's as if the JS blocks everything about that call until it terminates. The
>>>     hangup does
>>>     not even register in the Freeswitch log until after the script finishes. Tried it outside execute_on_originate
>>>     with the
>>>     normal javascript application in the XML dialplan - same effect. The whole process seems to be a single thread -
>>>     which
>>>     would make sense for most use cases, unfortunately just not this one. :P
>>>
>>>     Is there a way to fork the JS execution into the background? Something similar to setTimout() maybe? Or even better
>>>     execute a dialplan app from JS that allows outside events to catch up? I tried the sleep application instead of JS
>>>     msleep, but that didn't help either.
>>>
>>>     On 01.08.2015 22:05, Ken Rice wrote:
>>>     > You are looking for session ready or a hanguk up hook callback see confluence for details
>>>     >
>>>     > Sent from my iPhone
>>>     >
>>>     >> On Aug 1, 2015, at 3:53 PM, Thomas <lists at virtues.net> wrote:
>>>     >>
>>>     >> Does anyone know if there is a way to track changes to the call state, most notably a hangup, while executing
>>>     >> Javascript? We're using JS to set up a call on a device connected to Freeswitch through portaudio. That call is
>>>     >> initiated with sip/sofia executing the JS in the dialplan. If the SIP leg hangs up while the JS is running,
>>>     nothing
>>>     >> happens until the JS terminates.
>>>     >>
>>>     >> I wanted to check from the script, but haven't found a way to do that. "session.state" doesn't change, hangup
>>>     hook
>>>     >> doesn't fire, and without setTimeout or something similar I didn't find a way to "background" the JS.
>>>     >>
>>>     >> Is there any way to detect a hangup during JS execution?
>>>     >>
>>>     >> Cheers!
>>>     >>
>>>     >> Thomas
>>>     >>
>>>     >>
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>>
>>
>>
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>>
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>
>
>
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