I'm using ActionDispatch::Http::UploadedFile.new
with my Grape
project to upload files.
I'm not using any gem like paperclip
to the job and I want to validate the file type and not to allow executable files.
From the documentarians seems I can use #content_type
to check out the content of the file.
Is there any simple way to do the validation and where can I find a list of executable extensions?