Alle guten Dinge sind dreist: Schon wieder Schei? Encoding...

[CPAN]

TIMTOWTDI. Mir gefällt das dritte am besten, weil es außer ISO-8859-1 noch viele andere Legacykodierungen erkennt.

⓵

  
use Devel::Peek qw(Dump);  
use Encoding::FixLatin qw(fix_latin);  
use URI::Escape qw(uri_unescape);  
  
while (defined (my $u = <DATA>)) {  
    chomp $u;  
    $u = uri_unescape $u;  
    $u = fix_latin $u;  
    Dump $u;  
}  
  
__DATA__  
%C3%B6ffnen  
%F6ffnen  

⓶

  
use Devel::Peek qw(Dump);  
use Encode qw(decode);  
use Try::Tiny qw(try catch);  
use URI::Escape qw(uri_unescape);  
  
while (defined (my $u = <DATA>)) {  
    chomp $u;  
    $u = uri_unescape $u;  
    try {  
        $u = decode 'UTF-8', $u, Encode::FB_CROAK;  
    } catch {  
        $u = decode 'ISO-8859-1', $u, Encode::FB_CROAK;  
    };  
    Dump $u;  
}  
  
__DATA__  
%C3%B6ffnen  
%F6ffnen  

⓷

  
use Devel::Peek qw(Dump);  
use Encode qw(decode);  
use Encode::Detect qw();  
use URI::Escape qw(uri_unescape);  
  
while (defined (my $u = <DATA>)) {  
    chomp $u;  
    $u = uri_unescape $u;  
    $u = decode 'Detect', $u;  
    Dump $u;  
}  
  
__DATA__  
%C3%B6ffnen  
%F6ffnen