To FreeSWITCH users,

 

I am currently experimenting with Lua scripts on FreeSWITCH (latest build) and found an interesting issue with FreeSWITCH default CDRs (inside log/cdr-csv/1000.csv).

 

See below for my simple Lua script called from a diaplan as follows:

 

<include>

    <!-- To test Lua script  -->

    <extension name="ivr_demo">

      <condition field="destination_number" expression="^(9101)$">

                                <action application="lua" data="myservice.lua"/>                          

      </condition>

    </extension>

</include>

 

What I noticed is that placing a call into FreeSWITCH via a SIP phone (calling 9101) and landing on myservice.lua everything processes as expected.  If I hangup after 3 seconds then I should expect the CDR to show ${billsec} = 3.  However this is not the case since both ${duration} and ${billsec} are actually set once the Lua script completes (not based on HANGUP).  So inside 1000.csv I see duration and billsec both having 8 seconds.

 

You will see below that inside my hangup handler (function myHangupHook(s, status, arg)) I fire an event and wait up to 5000ms for an event to be returned (currently I am not returning an event so the 5000ms will take place).  This explains the extra 5 seconds after the 3 seconds of the call.

 

My question is since FreeSWITCH knows that the HANGUP has taken place why is the ${billsec} not correct (ie. should be 3 seconds)?

 

I tried adding “session:hangup()” as the first line inside my hangup handler (function myHangupHook(s, status, arg)) and this made no difference.

 

Is there a solution to this issue?  Perhaps there is a different CDR variable that will contain the correct duration based on when HANGUP was actually received.

 

Thanks in advance for any assistance with this.

 

Regards,

 

Andrew Keil

 

 

Simple Lua Script:

 

-- myservice.lua

-- To test a simple service

 

function MainService()

                freeswitch.consoleLog("INFO", "MAIN SERVICE SECTION\n")

 

                -- answer the call

                freeswitch.consoleLog("INFO", "ANSWER CALLER\n")

                session:answer();

 

                -- sleep a second

                freeswitch.consoleLog("INFO", "Sleep for 1000ms\n")

                session:sleep(1000);

 

                freeswitch.consoleLog("INFO", "Playing 12345\n")

                session:say("12345", "en", "number", "pronounced");

                freeswitch.consoleLog("INFO", "Finished playing 12345\n")

 

                if (session:ready()) then

                                -- hangup

                                freeswitch.consoleLog("INFO", "HANGUP\n")

                                session:hangup() 

                end

end

 

 

--------------------------------------------------------------------------------------------

 

 

-- Functions section …

 

function myHangupHook(s, status, arg)

    freeswitch.consoleLog("INFO", "myHangupHook: " .. status .. "\n")

               

    -- send hangup event test (after caller hangs up)

    local event = freeswitch.Event("CUSTOM", "visytel::HANGUP?")

                event:addHeader("hi", "there")

                event:addHeader("channel-uuid", channeluuid)

                -- Add Event consumer if a response is required!

                local con = freeswitch.EventConsumer("CUSTOM", "visytel::HANGUP!")

    -- fire event

    freeswitch.consoleLog("INFO", "Fire HANGUP event\n")        

    event:fire()   

                -- Wait for 5000ms to test response

                local retevent = con:pop(1, 5000)

                if retevent then

                                freeswitch.consoleLog("INFO", "Reply received!\n")

                                freeswitch.consoleLog("INFO",  string.format("Reply received: %s\n",retevent:getHeader("Result")))

                end

end

 

-- Setup handlers here

myparam="empty";

session:setHangupHook("myHangupHook", "myparam")

 

-- Source channel-uuid here {used inside myHangupHook handler and for all fired events inside the header

channeluuid = session:getVariable("uuid");

 

MainService()

 

 

-- End of lua script

 

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