Hints — Presigned URL - Lab 04

Open each hint only after you’ve spent time investigating on your own.

---

Hint 1 — Read the error

Look closely at the error response in your browser. It will be an XML document. What does the error say?

---

Hint 2 — Inspect the URL

Presigned URLs contain query parameters that control their behavior. Look at the URL itself.

---

Hint 3 — How to fix it

The original presigned URL is expired and cannot be extended. You need to generate a new one with a longer expiration.

---

Spoiler Alert — Full Solution

Root cause: The presigned URL was generated with an expiration of 5 seconds. By the time you copied it from the CloudFormation Outputs and opened it, it had already expired. Expired presigned URLs return AccessDenied.

---

To generate a working presigned URL:

1. Open the S3 console and navigate to your bucket
2. Check the box next to index.html
3. Click Object actions > Share with a presigned URL
4. Set a time interval (e.g., 1 hour) and click Create presigned URL
5. The URL is copied to your clipboard — open it in your browser
6. The AWS Broken Labs welcome page should load