1 files changed, 29 insertions, 0 deletions
diff --git a/testing/web-platform/tests/fetch/metadata/resources/echo-as-json.py b/testing/web-platform/tests/fetch/metadata/resources/echo-as-json.py
new file mode 100644
index 0000000000..44f68e8fe9
--- /dev/null
+++ b/testing/web-platform/tests/fetch/metadata/resources/echo-as-json.py
@@ -0,0 +1,29 @@
+import json
+
+from wptserve.utils import isomorphic_decode
+
+def main(request, response):
+    headers = [(b"Content-Type", b"application/json"),
+               (b"Access-Control-Allow-Credentials", b"true")]
+
+    if b"origin" in request.headers:
+        headers.append((b"Access-Control-Allow-Origin", request.headers[b"origin"]))
+
+    body = u""
+
+    # If we're in a preflight, verify that `Sec-Fetch-Mode` is `cors`.
+    if request.method == u'OPTIONS':
+        if request.headers.get(b"sec-fetch-mode") != b"cors":
+            return (403, b"Failed"), [], body
+
+        headers.append((b"Access-Control-Allow-Methods", b"*"))
+        headers.append((b"Access-Control-Allow-Headers", b"*"))
+    else:
+        body = json.dumps({
+            u"dest": isomorphic_decode(request.headers.get(b"sec-fetch-dest", b"")),
+            u"mode": isomorphic_decode(request.headers.get(b"sec-fetch-mode", b"")),
+            u"site": isomorphic_decode(request.headers.get(b"sec-fetch-site", b"")),
+            u"user": isomorphic_decode(request.headers.get(b"sec-fetch-user", b"")),
+            })
+
+    return headers, body