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def main(request, response):
tag = request.GET.first("tag", None)
match = request.headers.get("If-None-Match", None)
date = request.GET.first("date", "")
modified = request.headers.get("If-Modified-Since", None)
if tag:
response.headers.set("ETag", '"%s"' % tag)
elif date:
response.headers.set("Last-Modified", date)
if ((match is not None and match == tag) or
(modified is not None and modified == date)):
response.status = (304, "SUPERCOOL")
return ""
else:
response.headers.set("Content-Type", "text/plain")
return "MAYBE NOT"
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