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

[Donat Zenichev]

Hi Liviu !
Thank you for your answer : )

> .. you would be surprised to find out that it would actually work!

Yeah, that's true! In case I define regular expression separately it works
out well.
For some reason I didn't came to mind it can be fixed in such sophisticated
way : )

Now it's clear for me.
Have a nice day!


On Wed, Feb 19, 2020 at 4:37 PM Donat Zenichev <donat.zenichev at gmail.com>
wrote:

> 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
>
>

-- 

Best regards,
Donat Zenichev
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