sub parse_form_data
{
    local (*FORM_DATA) = @_;
    
    local ( $request_method, $query_string, @key_value_pairs, 
           $key_value, $key, $value);
    
    $request_method = $ENV{'REQUEST_METHOD'};
    
    if ( $request_method eq "GET") {
        $query_string = $ENV{'QUERY_STRING'};
    } elsif ($request_method eq "POST") {
        read (STDIN, $query_string, $ENV{'CONTENT_LENGTH'});
    } else {
        print "Content-type: text/html", "\n";
        print "Status: 500", "\n\n";
        exit(1);
    }
    
    @key_value_pairs = split (/&/, $query_string);
    
    foreach $key_value (@key_value_pairs) {
        ($key, $value) = split(/=/, $key_value);
	next unless $value;
        $value =~ tr/+/ /;
        $value =~ s/%([\dA-Fa-f][\dA-Fa-f])/pack ("C", hex ($1))/eg;
    
        if (defined($FORM_DATA{$key})) {
            $FORM_DATA{$key} = join ("\0", $FORM_DATA{$key}, $value);
        } else {
            $FORM_DATA{$key} = $value;
        }
    }
    
}
1;