fix(cloud-function): normalize encoded leading slash

mdn · May 12, 2023 · c575481 · c575481
1 parent aedce9b
commit c575481
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/cloud-function/src/middlewares/redirect-leading-slash.ts b/cloud-function/src/middlewares/redirect-leading-slash.ts
@@ -20,9 +20,14 @@ export async function redirectLeadingSlash(
   next: NextFunction
 ) {
   const pathname = req.url;
-  if (pathname.startsWith("//")) {
-    return redirect(res, pathname.replace(/^\/+/g, "/"));
+  const normalizedPathname = normalizeLeadingSlash(pathname);
+  if (pathname !== normalizedPathname) {
+    return redirect(res, normalizedPathname);
   }
 
   next();
 }
+
+function normalizeLeadingSlash(pathname: string): string {
+  return pathname.replace(/^(\/|%2f)+/i, "/");
+}