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def main(request, response):
"""
Check that headers sent to navigate here *do not* contain the device-memory client
hint, and report success/failure in a way compatible with
verify_{subresource|iframe}_state() in accept-ch-test.js
"""
if b"device-memory" in request.headers or b"sec-ch-device-memory" in request.headers:
result = u"FAIL"
else:
result = u"PASS"
content = u'''
<script>
let messagee = window.opener || window.parent;
messagee.postMessage("%s" , "*");
</script>
''' % (result)
headers = [(b"Content-Type", b"text/html"), (b"Access-Control-Allow-Origin", b"*")]
return 200, headers, content