Hello,
we can control/decide how to interpret returned codes on our config
language interpreter written from scratch, but not how it is done by an
external interpreter written by others.
Cheers,
Daniel
On 03.04.23 00:20, Chaigneau, Nicolas wrote:
> Thanks Alex :)
>
> I searched for $rc and found this:
>
>
> The definition of the sub-route block follows the general rules, with a name
> in between square brackets and actions between curly braces. A sub-route can
> return an integer value back to the routing block that executed it. The
> return code can be retrieved via $rc variables.
>
> Evaluation of the return of a subroute is done with following rules:
>
> negative value is evaluated as false
> 0 - is interpreted as exit
> positive value is evaluated as true
>
>
>
> I assume this also applies to command functions, not just "route" blocks.
>
> But this only applies to Kamailio script, not to KEMI, is that correct ?
> If so, do you know why the behavior is not the same in KEMI script ?
>
>
> Regards,
> Nicolas.
>
> -----Message d'origine-----
> De : Alex Balashov <abalas...@evaristesys.com>
>
> Consider $rc.
>
>
>> On Apr 2, 2023, at 1:01 PM, Chaigneau, Nicolas
>> <nicolas.chaign...@capgemini.com> wrote:
>>
>> Hello,
>>
>>
>>
>> I have a question regarding Kamailio script and how the return code from a
>> command export is handled as a boolean.
>>
>>
>> In Kamailio script, see this example:
>>
>> if (!jansson_get("method", $rb, "$var(method)")) {
>> xhttp_reply("400", "Bad Request", "", "");
>> exit;
>> }
>>
>> This code works, but I'm not sure why.
>> Command "jansson_get" returns 1 if successful, and -1 if fails. Both values
>> should be false.
>> Which I can see when testing with this:
>>
>> $var(r) = jansson_get("method", $rb, "$var(method)");
>> xlog("L_INFO", "jansson_get r: [$var(r)]\n");
>> if (!$var(r)) {
>> xlog("L_INFO", "jansson_get r: [$var(r)] => FALSE\n");
>> } else {
>> xlog("L_INFO", "jansson_get r: [$var(r)] => TRUE\n");
>> }
>>
>> In all cases, the result is always TRUE.
>> Is there some kind of "magic" conversion when directly checking the return
>> of a command in Kamailio script ?
>>
>>
>> With KEMI python, the equivalent does not work:
>>
>> if not KSR.jansson.get("method", KSR.pv.get("$rb"), "$var(method)"):
>> KSR.xhttp.xhttp_reply(400, "Bad Request", "", "")
>> return 1
>>
>> So I have to do the following instead:
>>
>> if KSR.jansson.get("method", KSR.pv.get("$rb"), "$var(method)") < 0:
>> KSR.xhttp.xhttp_reply(400, "Bad Request", "", "")
>> return 1
>>
>>
>>
>> Thank you for your help.
>>
>> Regards,
>> Nicolas.
>>
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