Map using regular expresion limited to {2} chars

[Frank Ruske]

Hello

I have a map to match my clients but somehow i can not limit the chars within the regular expression.

What i want to archive is the following map with a general regular expression:
map $uri $myclient {     
    default            noclient;
    ~/de/?                 de;
    ~/es/?                 es;
    ~/nl/?                 nl;
    # 1..n  (always 2 chars long)
}


But when i try it this way:

map $uri $myclient {     
    default            noclient;
    ~/(?<suffix>[a-z]{2})/  $suffix;
}

i get the following error:
nginx: [emerg] invalid number of the map parameters www.vm:17


This one works but i get even hits if i have more then 2 chars what is not desired behaviour.

map $uri $myclient {     
    default            noclient;
    ~/(?<suffix>[a-z])/  $suffix;
}



Any ideas? Thank you!

Regards Frank