How i can translate uppercase to lowercase letters in a rewrite rule in nginx web server?

Question

I need to translate the address:

www.example.com/TEST in ---> www.example.com/test

Answer 1

i managed to achieve the goal using embedded perl:

location ~ [A-Z] {
  perl 'sub { my $r = shift; $r->internal_redirect(lc($r->uri)); }';
}