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It is possible, as far as i know, to use the unix command "file -bi <filename>" and parse the returned result. It works very fine, but, unfortunatedly ;^)) just on Unix/Linux/*nix. Have read this on the [Zope] list and tested myself.

This is not quite correct, http://sources.redhat.com/cygwin/

At least the cygwin UNIX for win environment includes file(1). So this should work on any plattform where zope works.

*grin*, so much for more mailing lists, silly me is too dumb to even handle two of them. sorry, oliver