File Signature Table in Go. Includes utility to find file type based on file signatures. Based on Gary Kessler's work.
$ go get github.com/semk/filesigtable-go
$ filetype ~/Downloads/b93817f4-cc36-4e4c-a4df-6c5a53efbc6d.png
File signatures matched with the following types:
Description: PNG image
Class: Picture
Extension: PNG