[Zope-dev] How to return downloadable content from Python Method

I am compressing files which need to be uncompressed inline before download. The DTML <href=...> calles a python method in the product which returns the uncompressed file data. Say this file is an MSWord document, how do I return this as a file to download? Presently, the browser just tries to display the binary file and makes a mess of it. Regards, Simon B.