1 files changed, 30 insertions, 0 deletions
diff --git a/testing/web-platform/tests/fetch/fetch-later/resources/get_beacon.py b/testing/web-platform/tests/fetch/fetch-later/resources/get_beacon.py
new file mode 100644
index 0000000000..32cb9a9ba3
--- /dev/null
+++ b/testing/web-platform/tests/fetch/fetch-later/resources/get_beacon.py
@@ -0,0 +1,30 @@
+"""An HTTP request handler for WPT that handles /get_beacon.py requests."""
+
+import json
+
+_BEACON_ID_KEY = b"uuid"
+_BEACON_DATA_PATH = "beacon_data"
+
+
+def main(request, response):
+    """Retrieves the beacon data keyed by the given uuid from server storage.
+
+    The response content is a JSON string in one of the following formats:
+      - "{'data': ['abc', null, '123',...]}"
+      - "{'data': []}" indicates that no data has been set for this uuid.
+    """
+    if _BEACON_ID_KEY not in request.GET:
+        response.status = 400
+        return "Must provide a UUID to store beacon data"
+    uuid = request.GET.first(_BEACON_ID_KEY)
+
+    with request.server.stash.lock:
+        body = {'data': []}
+        data = request.server.stash.take(key=uuid, path=_BEACON_DATA_PATH)
+        if data:
+            body['data'] = data
+            # The stash is read-once/write-once, so it has to be put back after
+            # reading if `data` is not None.
+            request.server.stash.put(
+                key=uuid, value=data, path=_BEACON_DATA_PATH)
+        return [(b'Content-Type', b'text/plain')], json.dumps(body)