I want to write some middleware to notice when the inner app returns a
500 status code. I'm sure there are already sophisticated loggers that
do this sort of thing, but I'm using this as a learning exercise.
Right now, I wrapped the start_response callable. So when the WSGI
application calls the start response callable, I look at the first arg
passed in and do my test.
What's the right way to do this?
Matt
