[web2py] xhtml2pdf / pisa in a web2py view

[chris_g]

Has anyone had any luck running Pisa in a web2py view?
I've only had success with using it at the command line:
      pisa example.html
--> pisa.pdf

I've tried putting the following in a view, but I am getting an empty 
string returned.

{{
import logging
import os
import StringIO
import xhtml2pdf.pisa as pisa
filename = '%s/%s.html' % (request.controller,request.function)
if os.path.exists(os.path.join(request.folder,'views',filename)):
   html=response.render(filename)
else:
   html=BODY(BEAUTIFY(response._vars)).xml()
pass
result = StringIO.StringIO() 
pdf = pisa.CreatePDF(html, result)
=result.read()
}}



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