my ($input, $encoding, $charset, $boundary) = @_;
my $text, $filterpid, $prefixpid, $finread, $finwrite;
my $foutread, $foutwrite, $decoder, $ret, $filterflag;
my ($input, $encoding, $charset, $boundary) = @_;
my $text, $filterpid, $prefixpid, $finread, $finwrite;
my $foutread, $foutwrite, $decoder, $ret, $filterflag;