stale-css.py (883B)
1 def main(request, response): 2 3 token = request.GET.first(b"token", None) 4 is_query = request.GET.first(b"query", None) != None 5 with request.server.stash.lock: 6 value = request.server.stash.take(token) 7 count = 0 8 if value != None: 9 count = int(value) 10 if is_query: 11 if count < 2: 12 request.server.stash.put(token, count) 13 else: 14 count = count + 1 15 request.server.stash.put(token, count) 16 if is_query: 17 headers = [(b"Count", count)] 18 content = b"" 19 return 200, headers, content 20 else: 21 content = b"body { background: rgb(0, 128, 0); }" 22 if count > 1: 23 content = b"body { background: rgb(255, 0, 0); }" 24 25 headers = [(b"Content-Type", b"text/css"), 26 (b"Cache-Control", b"private, max-age=0, stale-while-revalidate=60")] 27 28 return 200, headers, content