my $mime = $self->r->lookup_file("$dir/$d")->content_type;

    push(@directories,$d) if !$seen{$d}++ && $mime eq DIR_MAGIC_TYPE;

    # .m3u files should be configured as audio/playlist MIME types in your apache .conf file
    push(@playlists,$d) if $mime =~ m!^audio/(playlist|x-mpegurl|mpegurl|x-scpls)$!;
    push(@txtfiles,$d) if $mime =~ m!^text/plain$!;