1 files changed, 9 insertions, 0 deletions
diff --git a/testing/web-platform/tests/tools/third_party/websockets/experiments/authentication/cookie_iframe.js b/testing/web-platform/tests/tools/third_party/websockets/experiments/authentication/cookie_iframe.js
new file mode 100644
index 0000000000..2d2e692e8d
--- /dev/null
+++ b/testing/web-platform/tests/tools/third_party/websockets/experiments/authentication/cookie_iframe.js
@@ -0,0 +1,9 @@
+// receive token from the parent window, set cookie and notify parent
+window.addEventListener("message", ({ origin, data }) => {
+    if (origin !== "http://localhost:8000") {
+        return;
+    }
+
+    document.cookie = `token=${data}; SameSite=Strict`;
+    window.parent.postMessage("", "http://localhost:8000");
+});