Add redirect_to

packages/hydrogen-remix/src/routing/redirect.ts

@@ -1,3 +1,4 @@
+import {redirect} from '@remix-run/oxygen';
 import type {HydrogenContext} from '@shopify/hydrogen';
 
 export async function notFoundMaybeRedirect(
@@ -23,10 +24,33 @@ export async function notFoundMaybeRedirect(
       },
     });
   } else {
+    const redirectPath = new URLSearchParams(search).get('redirect_to');
+
+    if (isLocalPath(redirectPath)) {
+      return redirect(redirectPath!);
+    }
+
     return new Response('Not found', {status: 404});
   }
 }
 
+function isLocalPath(url: string | null) {
+  if (!url) return false;
+
+  try {
+    // We don't want to redirect cross domain,
+    // doing so could create fishing vulnerability
+    // If `new URL()` succeeds, it's a fully qualified
+    // url which is cross domain. If it fails, it's just
+    // a path, which will be the current domain.
+    new URL(url);
+  } catch (e) {
+    return true;
+  }
+
+  return false;
+}
+
 const REDIRECT_QUERY = `#graphql
   query redirects($url:String) {
     urlRedirects(first:1, query:$url) {