public static boolean isBinary(String ext) {
        if (isImage(ext))
            return true;
        return "xlsx".equals(ext) || "docx".equals(ext) || "jar".equals(ext) || "class".equals(ext)
                || "zip".equals(ext) || "eot".equals(ext) || "ttf".equals(ext) || "woff".equals(ext) || "woof2".equals(ext);
    }
public static boolean isBinary ( String ext ) { if ( isImage ( ext ) ) return true ; return "xlsx" . equals ( ext ) || "docx" . equals ( ext ) || "jar" . equals ( ext ) || "class" . equals ( ext ) || "zip" . equals ( ext ) || "eot" . equals ( ext ) || "ttf" . equals ( ext ) || "woff" . equals ( ext ) || "woof2" . equals ( ext ) ; }
TODO: extensibility