[SR-Users] Caseless regex

[Marat Gareev]

Henning, Daniel,
thanks for your replies.

1. I don't want to use a Regex module because it might have a performance
impact.

> Matches the given string parameter against the regular expression
> pcre_regex, which is compiled in runtime into a PCRE object.
>

2.  I was surprised to find that the operator "=~" is case insensitive:
if (regcomp(re, (char*) exp->r.param,
REG_EXTENDED|REG_NOSUB|REG_ICASE) ){
LM_CRIT("bad re \"%s\"\n", (char*) exp->r.param);
pkg_free(re);
return E_BAD_RE;
}
so that enough for me:
$tU =~ "^test$"

Btw, what if I need case sensitive validation? Should I use the Regex
module?

Regards,
Marat

вт, 13 окт. 2020 г. в 14:17, Daniel-Constantin Mierla <miconda at gmail.com>:

> Hello,
>
> adding some more details to mention that regex operations done by the core
> (the =~ operator) use the libc posix regex functions, which do not support
> extended syntax. Also, these operations done by core use the case
> insensitive flag.
>
> As mentioned by Henning, regex should be an alternative, or maybe dialplan
> if one wants db-storage+caching of those regex rules.
>
> Moreover, if the above are not enough, a kemi embedded interpreter (e.g.,
> app_lua, app_python) can be used with inline execution in kamailio.cfg
> routing blocks -- those external scripting languages should have many
> options for regex matching.
>
> Cheers,
> Daniel
> On 13.10.20 13:04, Henning Westerholt wrote:
>
> Hello,
>
>
>
> just an idea, have you already tried this module:
> https://www.kamailio.org/docs/modules/stable/modules/regex.html
>
>
>
> Cheers,
>
>
>
> Henning
>
>
>
> --
>
> Henning Westerholt – https://skalatan.de/blog/
>
> Kamailio services – https://gilawa.com
>
>
>
> *From:* sr-users <sr-users-bounces at lists.kamailio.org>
> <sr-users-bounces at lists.kamailio.org> *On Behalf Of *Marat Gareev
> *Sent:* Tuesday, October 13, 2020 10:55 AM
> *To:* Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
> <sr-users at lists.kamailio.org>
> *Subject:* [SR-Users] Caseless regex
>
>
>
> Hello,
>
>
>
> Is it possible write more readable regular expression
>
> if ($tU =~ "(?i)^test$") {
>
>     ...
>
> }
>
> instead of "^[tT][eE][sS][tT]$"?
>
>
>
> On the first option, I get the error:
>
> 0(47250) ERROR: <core> [core/rvalue.c:3038]: fix_match_rve(): Bad regular
> expression
>
>
>
> Regards,
>
> Marat
>
> _______________________________________________
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>
> --
> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
> Funding: https://www.paypal.me/dcmierla
>
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