read(STDIN, $input, $ENV{ 'CONTENT_LENGTH'});
my %Form; # Hash für Variablen
my @pairs = split( /&/, $input );
foreach my $pair ( @pairs ) {
        my ($name, $value) = split(/=/, $pair);
        $name =~ tr/+/ /;
        $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;
        $value =~ tr/+/ /;
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;                            
        $Form{ $name } = $value;
}
# ab jetzt sind die eingelesenen CGI-Variablen in %Form drin