[metafunctor]

I've ended up implementing a layer on top of "magic" which, if magic detects application/zip, reads the zip file manifest and checks for telltale file names to reliably detect Office files.

The "magic" library does not seem to be equipped with the capabilities needed to be robust against the zip manifest being ordered in a different way than expected.

But this deep learning approach... I don't know. It might be hard to shoehorn in to many applications where the traditional methods have negligible memory and compute costs and the accuracy is basically 100% for cases that matter (detecting particular file types of interest). But when looking at a large random collection of unknown blobs, yeah, I can see how this could be great.

[stevepike]

If you're curious, here's how I solved it for ruby back in the day. Still used magic bytes, but added an overlay on top of the freedesktop.org DB: https://github.com/mimemagicrb/mimemagic/pull/20

[comboy]

Many commenters seem to be using magic instead of file, any reasons?

[e1g]

magic is the core detection logic of file that was extracted out to be available as a library. So these days file is just a higher level wrapper around magic

[comboy]

thanks