[Freeswitch-users] Issue with Javascript setTimeout
Matt Broad
matt at supportedbusiness.com
Tue Jan 26 23:37:26 MSK 2016
:/
I only came across this method after trying to get the sched_broadcast to
not block. An answer from Anthony on the 17th Sept 2015 (shown below) gave
me the idea, though I have never implemented it into anything other than
test code.
*"uuid_broadcast does not block.*
*The problem is you are calling it from your js app which is occupying the
session thread.*
*To perform async operation you need to run your script outside the session
thread by calling the script via the api interface via jsrun and pass the
uuid then put the channel into park or use an esl script to control the
session externally."*
I must admit the inner workings of the session thread is not something I
have looked into personally (one day maybe).
If you could give me a quick explanation as to why this wouldn't work that
would be appreciated :)
Thanks
Matt
On 26 January 2016 at 17:09, Michael Jerris <mike at jerris.com> wrote:
> This isn't supposed to work.. and might cause crashes.
>
> On Jan 26, 2016, at 10:18 AM, Matt Broad <matt at supportedbusiness.com>
> wrote:
>
> works fine for me :)
>
> *DialPlan*
> <condition field="destination_number" expression="^1234$">
> <action application="answer" />
> <action application="javascript" data="test.js" />
> </condition>
>
>
> *test.js*
> result = apiExecute("sched_api","+5 "+session.uuid+" jsrun /scripts/inc.js
> "+session.uuid);
> console_log("notice", "entering loop\n");
> while (session.ready())
> {
> //sit here whilst the call is still connected
> }
> console_log("notice", "call ended\n");
>
>
> *inc.js*
> include("includes/General.js"); //this includes a function "Output" to log
> to screen
>
> var session = new Session(argv[0]);
>
> if (session.ready()) {
> Output("TIMEOUT");
> session.execute("playback", "/sounds/en/us/callie/test.wav");
> session.execute("sleep","500");
> session.hangup();
> }
> exit("TIMEOUT");
>
>
> Thanks
> Matt
>
> On 26 January 2016 at 14:43, Michael Jerris <mike at jerris.com> wrote:
>
>> this won't actually work. You can't session execute from outside the
>> session thread like this.
>>
>>
>> On Tuesday, January 26, 2016, Matt Broad <matt at supportedbusiness.com>
>> wrote:
>>
>>> Hi Normando,
>>>
>>> from your description I assumed you were just trying to schedule a file
>>> to play and hang up.
>>>
>>> If you are trying to run a block of code at a certain time in the future
>>> then you could use sched_api.
>>> https://freeswitch.org/confluence/display/FREESWITCH/mod_commands#mod_commands-sched_api
>>> This will execute an API command after a given time. In your case you
>>> could use the API command *jsrun* to run a script containing your
>>> function.
>>>
>>> An example would be:
>>>
>>> *result = apiExecute("sched_api","120 "+session.uuid+" jsrun
>>> /scripts/function.js "+session.uuid+" "+despedida);*
>>>
>>>
>>> The above will execute jsrun after 120 seconds (this is linked to the
>>> session.uuid so if the channel is destroyed the task will be removed
>>> automatically). This will run the function.js file and pass it the current
>>> session uuid along with the despedida variable.
>>> Within the function.js file, you can create a session object using the
>>> uuid passed through and then use this to play the file etc
>>>
>>> e.g of function.js
>>>
>>> var session = new Session(argv[0]);
>>> var despedida = argv[1];
>>>
>>> if (session.ready()) {
>>> logger("TIMEOUT");
>>> session.execute("playback", sonidos + "/TIMEOUT.wav");
>>> session.execute("sleep","500");
>>> logger(despedida);
>>> session.execute("playback", sonidos + "/" + despedida + ".wav");
>>> session.hangup();
>>> }
>>> exit("TIMEOUT");
>>>
>>>
>>>
>>> thanks
>>> Matt
>>>
>>> On 25 January 2016 at 22:11, Michael Jerris <mike at jerris.com> wrote:
>>>
>>>> If you are trying to trigger that code to run at a specific time,
>>>> regardless of what else it is doing, that will be very difficult to do with
>>>> embedded js, and running with something async is probably required. A
>>>> note, you might want to look at phrase macros as they will greatly simplify
>>>> some of that code as well.\
>>>> Mike
>>>>
>>>> On Jan 25, 2016, at 4:24 PM, Normando Hall <nhall at unixlan.com.ar>
>>>> wrote:
>>>>
>>>> Hi Michael.
>>>>
>>>> Yes, you are right, maybe the better is to use ESL.
>>>> My script is basically an IVR. When all the audio files are played,
>>>> then wait until the user press a dtmf key or timeout occur. Because there
>>>> are a lot of files to play based on caller ID, I wait for the user input at
>>>> the end of the script, but prior to finish the script, because hangsup.
>>>>
>>>> I workaround this with:
>>>>
>>>> session.collectInput(onPlay, services, afterMenuTimeOut, totalTimeOut);
>>>> playTimeout(despedida)
>>>>
>>>> and return always "true" from "onPlay" callback.
>>>>
>>>> Respond to your question, this is the function I want to run in
>>>> setTimeout:
>>>>
>>>> function playTimeout(despedida){
>>>> if (session.ready()) {
>>>> logger("TIMEOUT");
>>>> session.execute("sleep","400");
>>>> session.execute("playback", sonidos + "/TIMEOUT.wav");
>>>> session.execute("sleep","400");
>>>> logger(despedida);
>>>> session.execute("playback", sonidos + "/" + despedida + ".wav");
>>>> session.hangup();
>>>> }
>>>> exit("TIMEOUT");
>>>> }
>>>>
>>>> Thanks
>>>> Normando
>>>>
>>>> El 25/01/2016 a las 05:20 p.m., Michael Jerris escribió:
>>>>
>>>> What exactly is the javascript doing when you want to call that
>>>> callback? this is probably not possible due to how the JavaScript is
>>>> blocked by native functions when doing actions such as handling audio due
>>>> to the threading model of the embedded languages. They run in the session
>>>> thread so they are not as async as people tend to be used to with js.
>>>> This sort of approach might be more appropriate when using js in a remote
>>>> control type structure such as when controlling a session over esl, but not
>>>> in the embedded mod_v8. we have discussed doing a truly async type control
>>>> for embedded languages but have never implemented it.
>>>>
>>>> On Monday, January 25, 2016, Normando Hall <nhall at unixlan.com.ar>
>>>> wrote:
>>>>
>>>>> Thanks Matt, I can play a file, but still can't run the function. Are
>>>>> there any application can run a function instead a file?
>>>>>
>>>>> Thanks!
>>>>> Normando
>>>>>
>>>>>
>>>>> El 25/01/2016 a las 05:59 a.m., Matt Broad escribió:
>>>>>
>>>>> try using the 1 liner sched_broadcast
>>>>> <https://freeswitch.org/confluence/display/FREESWITCH/mod_dptools%3A+sched+broadcast>
>>>>> https://freeswitch.org/confluence/display/FREESWITCH/mod_dptools%3A+sched+broadcast
>>>>>
>>>>> The below will schedule a broadcast to play /tmp/hangupfile.mp3 to
>>>>> both legs after 60 seconds.
>>>>>
>>>>> *maxTimeTaskID = **session.execute("sched_broadcast", "+60
>>>>> playback!normal_clearing::/tmp/hangupfile.mp3 both")*;
>>>>>
>>>>> If you find you need to cancel the broadcast use:
>>>>>
>>>>> *session.execute("sched_cancel",maxTimeTaskID);*
>>>>>
>>>>> hope this helps.
>>>>>
>>>>> thanks
>>>>> Matt
>>>>>
>>>>> On 25 January 2016 at 06:58, <royj at yandex.ru> wrote:
>>>>>
>>>>>> have no relationship to the resource, but first link to request
>>>>>> 'asynchronous code javascript'
>>>>>>
>>>>>>
>>>>>> http://www.hiddenwebgenius.com/blog/guides/understanding-javascripts-asynchronous-code/
>>>>>>
>>>>>> 25.01.2016, 09:16, "Normando Hall" <nhall at unixlan.com.ar>:
>>>>>> > Sorry, I missed to say it is Freeswitch 1.4
>>>>>> >
>>>>>> > El 25/01/2016 a las 02:53 a.m., Normando Hall escribió:
>>>>>> >> Hello everybody.
>>>>>> >>
>>>>>> >> I am coding a js script to do somethings, and I want to add a
>>>>>> global
>>>>>> >> timeout, to call a function to play a file and hangup. But the
>>>>>> function
>>>>>> >> called inmediatelly.
>>>>>> >> Also tested with setInterval, the same behaviour.
>>>>>> >>
>>>>>> >> function playTimeout(despedida){
>>>>>> >> if (session.ready()) {
>>>>>> >> logger("TIMEOUT");
>>>>>> >> session.execute("playback", sonidos + "/TIMEOUT.wav");
>>>>>> >> session.execute("sleep","500");
>>>>>> >> logger(despedida);
>>>>>> >> session.execute("playback", sonidos + "/" + despedida +
>>>>>> ".wav");
>>>>>> >> session.hangup();
>>>>>> >> }
>>>>>> >> exit("TIMEOUT");
>>>>>> >> }
>>>>>> >>
>>>>>> >> setTimeout(playTimeout(despedida),120000);
>>>>>> >> .
>>>>>> >> .
>>>>>> >> .
>>>>>> >> my script continue
>>>>>> >>
>>>>>> >> Any help is welcome!
>>>>>> >>
>>>>>> >> Thank you
>>>>>> >> Normando
>>>>>> >>
>>>>>> >>
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>>>>>
>>>>>
>>>>>
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>>>>
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>
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