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Lambda@Edge Overview

  • You have deployed a CDN using CloudFront
  • What if you wanted to run a global AWS Lambda alongside?

  • Or how to implement request filtering before reaching your application?

  • For this, you can use Lambda@Edge

    • Deploy lambda functions alongside your CloudFront CDN
      • Build more responsive applications
      • You don't manage servers, Lambda is deployed globally
      • Customize CDN content
      • Pay only for what you use

Lambda@Edge

  • You can use Lambda to change CloudFront requests and responses
    • After CloudFront receives a request from a viewer (viewer request)
    • Before CloudFront forwwards the request to the origin (origin request)
    • After CloudFront receives the response from the origin (origin response)
    • Before CloudFront forwards the response to the viewer (viewer response)
    • You can also generate responses to viewers without ever sending the request to the origin.

Use Cases

  • Website Security and Privacy
  • Dynamic Web Application at the Edge
  • Search Enging Optimization (SEO)
  • Intelligently Route Across Origins and Data Centers
  • Bot Mitigation at the Edge
  • Real-time Image Transformation
  • A/B Testing
  • User Authentication and Authorization
  • User Prioritization
  • User Tracking and Analytics