XLS Support

[mishu-]

Is it doable to also check for XLS?

[h2non]

Yes, it is. It was already implemented in the Go port of this package:
https://github.com/h2non/filetype#documents

PR would be very welcome!

[Agent-Hellboy]

Hi @h2non
The magic number of all the office documents are same how will I distinguish between doc, xls, and ppt file.
I have also checked the https://github.com/file/file but that was tough for me to understand.``

Word Document | .doc | D0 CF 11 E0 A1 B1 1A E1

Excel Document | .xls | D0 CF 11 E0 A1 B1 1A E1

PowerPoint Document | .ppt | D0 CF 11 E0 A1 B1 1A E1

Visio Document | .vsd | D0 CF 11 E0 A1 B1 1A E1