zope.app.wsgi adapters not registered by default

[Jeroen Michiel]

If you try to return a tempfile for delivering a download to a client, like this:

from tempfile import TemporaryFile

class Download(grok.View):
    def render(self):
        tempfile = TemporaryFile()
        tempfile.write('testing')
        return tempfile

you will get the error 'TypeError: The result should be None, a string, or adaptable to IResult.' accessing the view.

zope.app.wsgi does provide adapters for this purpose, but they aren't registered by default.
Adding 'zope.app.wsgi' to install_requires in setup.py solves the issue.

[Jan Wijbrand Kolman (janwijbrand)]

Fixed in the grok package version 1.7