1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
def main(request, response):
"""
This file is intended to be requested twice to verify that the correct headers
are included for images.
1. Make an initial request for an img. The `sec-browsing-topics` header will
be stored for step 2. The request will be redirected to an image.
2. Make a request with the query parameter set. The stashed header from the
first step will be returned in the response content.
Parameters:
`token` should be a unique UUID request parameter for the duration of this
request. It will get stored in the server stash and will be used later in
a query request.
`query` should be a request parameter indicating the request would like
to know the last `sec-browsing-topics` header with that token.
"""
token = request.GET.first(b"token", None)
is_query = request.GET.first(b"query", None) is not None
topics_header = request.headers.get(b"sec-browsing-topics", b"NO_TOPICS_HEADER")
queried_topics_header = b"NO_PREVIOUS_REQUEST"
with request.server.stash.lock:
value = request.server.stash.take(token)
if value is not None:
queried_topics_header = value
if not is_query:
request.server.stash.put(token, topics_header)
if is_query:
return (200, [(b"Access-Control-Allow-Origin", b"*")], queried_topics_header)
headers = [(b"Location", "pixel.png"),
(b"Access-Control-Allow-Origin", b"*")]
return 301, headers, b""
|
