1
Share your origins during requirement review
Include every web origin, HTTP method and custom header your uploader uses so the agreed CORS baseline can be applied.
S3 CORS Configuration for Web Uploads
Browser-based uploads require agreed Cross-Origin Resource Sharing (CORS) rules on the bucket. CORS is configured as part of Concierge Assisted Provisioning.
📋 Prerequisites
- Your web origin (for example https://example.com)
- HTTP methods and headers your uploader needs
Step-by-Step Instructions
2
Confirm the applied configuration
After provisioning, verify the agreed CORS behavior from your staging origin before production cutover.
3
Prefer pre-signed URLs for direct uploads
Combine CORS with pre-signed URLs so browsers upload directly without exposing the Secret Key.
📌 Important Notes
- CORS misconfiguration surfaces as browser errors even when CLI access works. Test from the real origin.