Mime type detection by magic numbers

[benonymus]

figured it out,

How to validate files uploaded by user effectively?

Hey I am using arc to manage my file uploads, and I am using the file extension whitelist, as it is in the examples, but is that safe enough? Is it possible to have different checking on file(images, other types of files as well like docx, zip, etc) uploads? I found this: https://hex.pm/packages/file_info but it deosn’t want to work yet