How to setup CORS for CDN Access

Last updated: May 23, 2025

Setup CORS Configuration

  1. Configure S3 bucket permissions by granting appropriate access to the app0-async role

  2. Set up CORS headers in your AWS configuration:

    • Add Access-Control-Allow-Origin header with value "*" to allow cross-origin requests

    • Apply these changes through your infrastructure-as-code (Terraform) configuration

  3. Deploy the configuration changes to production environment

  4. Verify the configuration by checking that your web application can successfully access resources from the CDN domain (cdn.cloud.app0.io)

Usage

Once configured correctly, your web application will be able to load scripts and other resources from the CDN without encountering CORS policy violations. For example, scripts like 'app0.dynamic-faq-product.js' should load successfully from any allowed domain.

If you continue to see CORS errors after configuration, verify that your changes have been properly propagated through your CDN cache.