[Kamailio-Users] PCRE Regex / Transformations Bug?

[Daniel-Constantin Mierla]

On 12/23/09 8:29 AM, Iñaki Baz Castillo wrote:
> El Miércoles, 23 de Diciembre de 2009, Brandon Armstead escribió:
>    
>> Hello,
>>
>>     I'm attempting to use the following in Kamailio:
>> $(hdr(from){re.subst,/(.*?);(.*)/\1/}) --- however it does not match /
>> replace, with this from header sample:
>>
>> From:<sip:714364XXXX at XX.XX.XX.XX
>> ;pstn-params=808282808882;cpc=unknown>;tag=gK0b53f6d9
>>
>> However if this is fully pcre compatible, then I am a bit lost as I've
>> checked the results in php, perl, and python produces:
>>
>> From:<sip:714364XXXX at XX.XX.XX.XX (expected result)
>>
>> However, Kamailio does not match / replace / etc using the following:
>> xlog("L_INFO", "Test From Header Regex:
>> $(hdr(from){re.subst,/(.*?);(.*)/\1/})");
>>      
> You are right. However, could you try by replacing "(.*?)" with "([^;]*)" ?
> The result should be the same.
>
> I suspect that "*?" is not supported in Kamailio regular expressions.
>    

the re.subst transformation uses Posix regexp for matching, only the 
format of the command is perl-like. I implemented this because textops 
has no dependency of extra libraries than core and I wanted to keep it so.

Maybe is good to add a pcre.subst transformation in regex module to be 
able to use extended regexp formats given by libpcre.

Cheers,
Daniel


-- 
Daniel-Constantin Mierla
* http://www.asipto.com/