[Zope-dev] Efficient serving of large files using iterator?

Hi, I've tried from ZPublisher.Iterators import filestream_iterator return filestream_iterator('/home/chrism/bigfile.xls', 'r') in a method to return a big file to users; however, it doesn't work, are there alternative ways to serve large files to users, serving files that are lying somewhere on the filesystem? Thanks, Morten -- Nidelven IT || We know Python, Zope & Plone http://www.nidelven-it.no/