async def application(scope, receive, send):
    if scope['type'] == 'lifespan':
        while True:
            message = await receive()
            if message['type'] == 'lifespan.startup':
                await send({"type": "lifespan.startup.failed"})
                raise Exception('Exception blah')

            elif message['type'] == 'lifespan.shutdown':
                await send({'type': 'lifespan.shutdown.complete'})
                return
