servo/tests/wpt/web-platform-tests/fetch/stale-while-revalidate/stale-image.py

38 lines
1.2 KiB
Python

import os.path
def main(request, response):
token = request.GET.first("token", None)
is_query = request.GET.first("query", None) != None
with request.server.stash.lock:
value = request.server.stash.take(token)
count = 0
if value != None:
count = int(value)
if is_query:
if count < 2:
request.server.stash.put(token, count)
else:
count = count + 1
request.server.stash.put(token, count)
if is_query:
headers = [("Count", count)]
content = ""
return 200, headers, content
else:
filename = "green-16x16.png"
if count > 1:
filename = "green-256x256.png"
path = os.path.join(os.path.dirname(__file__), "../../images", filename)
body = open(path, "rb").read()
response.add_required_headers = False
response.writer.write_status(200)
response.writer.write_header("content-length", len(body))
response.writer.write_header("Cache-Control", "private, max-age=0, stale-while-revalidate=60")
response.writer.write_header("content-type", "image/png")
response.writer.end_headers()
response.writer.write(body)