I have a generated string and would like to send that as a file to the web client.

I have done that using http.Controller and

return request.make_response( document, headers=[ ('Content-Disposition', 
'attachment; filename="freebusy.ics"'), 
('Content-ype', 'text/calendar'), 
('Content-Length', len(document)), ])

I would like to do the same within models.Model method.

Is it possible?