1 files changed, 25 insertions, 0 deletions
diff --git a/testing/web-platform/tests/client-hints/resources/viewport-frame.py b/testing/web-platform/tests/client-hints/resources/viewport-frame.py
new file mode 100644
index 0000000000..67b592c71a
--- /dev/null
+++ b/testing/web-platform/tests/client-hints/resources/viewport-frame.py
@@ -0,0 +1,25 @@
+def main(request, response):
+    """
+    postMessage with Viewport-Width and Sec-Ch-Viewport-Height headers
+    """
+
+    if b"sec-ch-viewport-width" in request.headers:
+        width = request.headers["sec-ch-viewport-width"]
+    else:
+        width = b"FAIL"
+
+    if b"sec-ch-viewport-height" in request.headers:
+        height = request.headers["sec-ch-viewport-height"]
+    else:
+        height = b"FAIL"
+
+    headers = [(b"Content-Type", b"text/html"),
+               (b"Access-Control-Allow-Origin", b"*")]
+    content = b'''
+<script>
+  let parentOrOpener = window.opener || window.parent;
+  parentOrOpener.postMessage({ viewportWidth: '%s', viewportHeight: '%s' }, "*");
+</script>
+''' % (width, height)
+
+    return 200, headers, content