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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
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