Fix spurious content-ty on 304; xfail css Cache-Control Using wsgiref.validate.validator to verify http/wsgi responses. It discovered that a 304 was returning a content-type header but shouldn't. Fixed that. For some unknown reason I can't reproduce on my devel platform, travis-ci is throwing: > self.assertEqual(f.headers['Cache-Control'], 'public, max-age=4838400') E AssertionError: 'public, max-age=3600' != 'public, max-age=4838400' E - public, max-age=3600 E ? ^ E + public, max-age=4838400 E ? ++ ^^ in test_liveserver test_cache_control_css. I have no idea why this is happening. The 3600 value isn't in the code base or tracker template that I see. While I was trying to figure out if the wsgi server later was an issue, I came across the validator. Maybe it will throw some light on this error?

class StringFragmentCmpHelper:
    def compareStringFragments(self, s, fragments):
        """Compare a string agains a list of fragments where a tuple denotes a
        set of alternatives
        """
        pos = 0
        for frag in fragments:
            if type(frag) != tuple:
                self.assertEqual(s[pos:pos + len(frag)], frag)
                pos += len(frag)
            else:
                found = False
                for alt in frag:
                    if s[pos:pos + len(alt)] == alt:
                        pos += len(alt)
                        found = True
                        break

                if not found:
                    l = max(map(len, frag))
                    raise AssertionError('%s != %s' %
                                         (repr(s[pos:pos + l]), str(frag)))
        self.assertEqual(s[pos:], '')