[Zope] streaming data through zope from an external method.

I've got an external method that is generating a (possibly quite large) audio file and sending it back. Right now, I'm generating this in memory in a big string, then returning it to zope. I'd _like_ to be able to just have the external method send the data straight through (maybe in chunks) without having to read it all into memory. Is this possible with zope at all? Anthony