Cloudfront Functions & Lambda@Edge

AWS – Customization at the Edge

• Runs part of the application logic close to the end user to minimize latency.

• Uses CloudFront distributions to deploy small functions globally.

• No infrastructure management and serverless pricing (pay per invocation).

Options in CloudFront

• CloudFront Functions – lightweight JavaScript functions for high-scale, short-duration tasks.

• Lambda@Edge – full Lambda runtime support for more complex processing at the edge.

Typical Use Cases

• Website security and privacy enforcement.

• Dynamic web application behavior at the edge.

• SEO improvements through dynamic content changes.

• Intelligent routing between origins and data centers.

• Bot mitigation and request filtering.

• Real-time image manipulation and transformation.

• A/B testing and feature rollouts.

• Authentication and authorization checks.

• User prioritization based on profile or region.

• Analytics and user behavior tracking at the edge.