# Input and formate
read(STDIN, my $Daten, $ENV{'CONTENT_LENGTH'});
my @Formularfelder = split(/&/, $Daten);
my ($Feld, $Name, $Wert);
my %Formular;
foreach $Feld (@Formularfelder) {
  (my $Name, my $Wert) = split(/=/, $Feld);
  $Wert =~ tr/+/ /;
  $Wert =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex(&ũ))/eg;
  $Wert =~ s/</</g;
  $Wert =~ s/>/>/g;
  $Formular{$Name} = $Wert;
 }