
PASS Upload events registered on time (http://127.0.0.1:8800/xhr/resources/corsenabled.py) 
PASS Upload events registered on time (resources/redirect.py?code=307&location=http://127.0.0.1:8800/xhr/resources/corsenabled.py) 
PASS Upload events registered too late (http://127.0.0.1:8800/xhr/resources/corsenabled.py) 
PASS Upload events registered too late (resources/redirect.py?code=307&location=http://127.0.0.1:8800/xhr/resources/corsenabled.py)