1 files changed, 50 insertions, 0 deletions
diff --git a/testing/web-platform/tests/client-hints/resources/stale-echo-client-hints.py b/testing/web-platform/tests/client-hints/resources/stale-echo-client-hints.py
new file mode 100644
index 0000000000..e9832273b8
--- /dev/null
+++ b/testing/web-platform/tests/client-hints/resources/stale-echo-client-hints.py
@@ -0,0 +1,50 @@
+import random
+import string
+
+from wptserve.utils import isomorphic_encode
+import importlib
+client_hints_full_list = importlib.import_module("client-hints.resources.clienthintslist").client_hints_full_list
+
+def id_token():
+   letters = string.ascii_lowercase
+   return u''.join(random.choice(letters) for i in range(20))
+
+def main(request, response):
+    client_hint_headers = client_hints_full_list()
+    client_hints_curr = {i:request.headers.get(i) for i in client_hint_headers}
+
+    token = request.GET.first(b"token", None)
+    is_query = request.GET.first(b"query", None) is not None
+    with request.server.stash.lock:
+      stash = request.server.stash.take(token)
+      if stash != None:
+        (value, client_hints_prev) = stash
+        count = int(value)
+      else:
+        count = 0
+        client_hints_prev = {}
+
+      if is_query:
+        if count < 2:
+          request.server.stash.put(token, (count, client_hints_curr))
+      else:
+        count = count + 1
+        request.server.stash.put(token, (count, client_hints_curr))
+
+    for header in client_hint_headers:
+      if client_hints_curr[header] is not None:
+        response.headers.set(header+b"-recieved", client_hints_curr[header])
+      if (header in client_hints_prev) and (client_hints_prev[header] is not None):
+        response.headers.set(header+b"-previous", client_hints_prev[header])
+
+    if is_query:
+      headers = [(b"Count", count)]
+      content = u""
+      return 200, headers, content
+    else:
+      unique_id = id_token()
+      headers = [(b"Content-Type", b"text/html"),
+                 (b"Cache-Control", b"private, max-age=0, stale-while-revalidate=60"),
+                 (b"Unique-Id", isomorphic_encode(unique_id))]
+      content = u"report('{}')".format(unique_id)
+      return 200, headers, content