[SR-Users] help with regex extracting from $rb

[Sergiu Pojoga]

May be for a start someone can clarify the general rules of engagement in
this battle with regex transformations.
https://www.kamailio.org/wiki/cookbooks/5.1.x/transformations#resubst_expression

What kind of regex library does this function expect: PCRE, Perl, Java,
POSIX BRE/ERE?
I've used all kinds of regex validators, regex101.com, rexv.org. Some
expressions pass those but do not work in Kamailio. The result is a dump of
the entire $rb.

Much obliged.

On Mon, Oct 29, 2018 at 1:33 PM Sergiu Pojoga <pojogas at gmail.com> wrote:

> Hi there,
>
> May be some regex gurus can help me out. Being aware that regex's are
> tricky but not seeing another alternative in this particular case.
>
> Trying to extract MOSLQ field from $rb.
>
> $var(moslq) =
> $(rb{re.subst,/.*MOSLQ=([0-9].[0-9])\s+MOSCQ=([0-9].[0-9]).*/\1/s});
>
> Above regex works fine IF body contains a single matching line. However,
> if there's 2 lines as in the below example - it return $var(moslq)=0.0, the
> last found value.
>
> I need only *LocalMetrics *values, so I tried this regex which works fine
> in regex101.com with flag 'multi-line' and *without flag 'global'*, but
> doesn't work in Kamailio.
> $var(moslq) =
> $(rb{re.subst,/.*MOSLQ=([0-9].[0-9])\s+MOSCQ=([0-9].[0-9])[\nRemoteMetrics]?.*/\1/s});
>
> Assuming $rb is as follows:
> VQSessionReport
> CallID:1ca9258d285a539e3c1048205bf38d41 at mypb.net
> LocalMetrics:
> Timestamps:START=2018-10-29T15:04:38Z STOP=2018-10-29T15:06:13Z
> QualityEst:EXTRI=127 MOSLQ=4.2 MOSCQ=4.4
> RemoteMetrics:
> Timestamps:START=2018-10-29T15:04:38Z STOP=2018-10-29T15:06:13Z
> QualityEst:RCQ=0 EXTRI=0 MOSLQ=0.0 MOSCQ=0.0
>
> Thanks in advance.
>
>
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