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import json
import time
def main(request, response):
uuid = request.GET[b"uuid"]
response.headers.set(b"Cache-Control", b"no-store")
with request.server.stash.lock:
received = request.server.stash.take(uuid)
if b"check" in request.GET:
response.headers.set(b"Content-Type", b"application/json")
response.content = json.dumps({"received": received is not None and received > 0})
if received:
request.server.stash.put(uuid, received)
return
if received is None:
received = 0
received += 1
request.server.stash.put(uuid, received)
response.headers.set(b"Content-Type", b"application/javascript")
response.content = b"// preloaded resource"