B4J Question How to get the MIME type of a file?

[KMatle]

I'm developing a mail importer and would like to check the mime type of a file without trusting the file extension. Is there a simple way to do this?

 

[Andrew (Digitwell)]

Depends on your definition of simple.

There is this GitHub project which identifies quite a range of filetypes by file signature header bytes.

GitHub - Tinram/File-Identifier: Identify a file via MIME type and file signature detection.

Identify a file via MIME type and file signature detection. - Tinram/File-Identifier

github.com

It is in PHP, but could be converted.

Seems to cover 60 different file types.