The ApertureMimeTypeDetector class is an implementation of MimeTypeDetector that uses the Aperture open-source library, which is a very capable utility for determining the MIME type for a wide range of file types, using both the file name and the actual content.

To use, simply include the dna-mime-type-detector-aperture.jar file on the classpath and create a new ExecutionContext subcontext with it:

MimeTypeDetector myDetector = new ApertureMimeTypeDetector();
ExecutionContext contextWithMyDetector = context.with(myDetector);