[OpenSIPS-Users] An obstacle with using variables in regular expression

[Donat Zenichev]

Hi Răzvan!
Thank you that you spent your time on this.

Your way worked out and the check now works as intended.
I can't thank you enough, really appreciate this.

Have a nice day!

On Wed, Feb 19, 2020 at 4:24 PM Răzvan Crainea <razvan at opensips.org> wrote:

> Hi, Donat!
>
> Your code is checking the variable with the "^$var(each)"
> string/literal, the variable is not expanded within the quotes (like it
> is done in php).
> In order to fix this, you should do something like:
> $var(regex) = "^" + $var(each);
> if ($rU ~= $var(regex))
>
> Best regards,
> Răzvan
>
> On 2/19/20 3:40 PM, Donat Zenichev wrote:
> > Hi OpenSIPS community!
> > I've come across one small obstacle, when trying to use pseudo variables
> > or attribute value pairs in regular expression.
> >
> > I believe my mistake should be quite simple.
> >
> > Regular expression is used in a condition:
> > if ( $rU =~ "^$var(each)" )
> >
> > $var(each) - is a string variable, not integer. It contains certain
> > prefix, like "44".
> >
> > For some reason OpenSIPS script is not able to get through this check
> > properly.
> > But, in case I hardcode something like this:
> > if ( $rU =~ "^44" )
> > then it passes a check as needed.
> >
> > To my shame, I spent several hours trying to solve this in different
> > ways, but without any success.
> >
> > I think that the problem consists of extra quotes appearing when
> > $var(each) comes into play.
> > So I have first quoting defined in a condition, they wrap regular exp:
> > ^$var(each)
> > And when $var(each) is defined in a condition, it gets quotes too, since
> > it's a string.
> >
> > Of course I can use some other way to run this check, for example with
> > help of regex module.
> > But my curiosity doesn't give me any chance to set this case aside.
> >
> > Any advice is appreciated!
> >
> > --
> >
> > Best regards,
> > Donat Zenichev
> >
> >
> > _______________________________________________
> > Users mailing list
> > Users at lists.opensips.org
> > http://lists.opensips.org/cgi-bin/mailman/listinfo/users
> >
>
> --
> Răzvan Crainea
> OpenSIPS Core Developer
>    http://www.opensips-solutions.com
>
> _______________________________________________
> Users mailing list
> Users at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>


-- 

Best regards,
Donat Zenichev
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