When IF-MODIFIED-SINCE HTTP header causes WebOb to set a 304 status code, bowerstatic as a tween causes an error because it tries to check the content. When it does so, it raises an exception which turns into a 500 instead of the 304. The 304 is supposed to be returned to the browser.
injector.py:
if response.content_type.lower() not in CONTENT_TYPES:
This throws an an exception.
AttributeError: 'NoneType' object has no attribute 'lower'
response.content_type has been set to empty since a 304 doesn't return content. I think if call sees a 304 it should just immediately return response.
When IF-MODIFIED-SINCE HTTP header causes WebOb to set a 304 status code, bowerstatic as a tween causes an error because it tries to check the content. When it does so, it raises an exception which turns into a 500 instead of the 304. The 304 is supposed to be returned to the browser.
injector.py:
This throws an an exception.
response.content_type has been set to empty since a 304 doesn't return content. I think if call sees a 304 it should just immediately return response.