How would I go about downloading a lua file using openresty

[ElpersonPL]

I'd want to be able to download a file using lua code but reading using lua might be very bad (especially for large files becaue it'd have to allocate a lot of RAM) so is there a function that can make openresty do it automatically and download the file to the user's PC?

[ElpersonPL]

Edit: *a file not only lua files but files in general

[Kshitij Joshi]

Can you set a response header?

add_header  Content-Disposition  attachment;