fileviewer: catchall for readable and non-readable files

Question

at the bottom of all fileviewers I would like to create a catchall fileviewer (maybe two?) that execute a program if the file under cursor has readable text, and another program if it doesn't have readable text (like .iso, .exe, .py ecc); would that be feasible?

Answer 1

You could use mimetypes for that, but they won't always give an expected result. For example, you list .py-files as unreadable, but their mimetype is text/x-script.python.

" non-directory with a mimetype starting with "text/"
fileviewer {*[^/]}<text/*> text-file-handler

" non-directory with a mimetype not starting with "text/"
fileviewer {*[^/]}!<text/*> non-text-file-handler

Comments

yeah mimetype is prone to miss, thank you for the insight tho, I think I'll going to use extension instead to be more precise