text/html; lynx -stdin -dump -force_html ; copiousoutput
application/pdf; mupdf %s;
application/vnd.openxmlformats-officedocument.wordprocessingml.document; libreoffice %s;
application/vnd.openxmlformats-officedocument.presentationml.presentation; libreoffice %s;
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet; libreoffice %s;

image/png; mupdf %s;
image/jpg; mupdf %s;
image/jpeg; mupdf %s;