Category: Lambda@Edge

Cross-origin resource sharing (CORS) is a security feature implemented by web browsers that controls which web pages or web applications are allowed to make requests to a different domain or origin. In other words, CORS is a mechanism that prevents a web page hosted on one domain from making requests for resources from a different […]

While website performance issues are a common occurrence, pinpointing their root causes can be a challenging task. In this post, you will learn how to simplify the performance troubleshooting process by unlocking the potential of the Server-Timing header. This header allows backend components to communicate timing metrics and other insights relevant to performance monitoring in […]

[Update on May 7th 2025] Amazon CloudFront SaaS Manager introduces a new type of distribution called a multi-tenant distribution. A key challenge for SaaS providers is designing secure, scalable tenant routing mechanisms to identify tenants and route requests to appropriate resources. Effective tenant routing ensures isolation, scalability, and security. This post explores strategies for routing […]

In this post, we demonstrate how to implement tag-based invalidation in Amazon CloudFront with Lambda@Edge, Amazon DynamoDB, AWS Lambda, and AWS Step Functions. This post provides you with a reference architecture and sample code artifacts to help you deploy and test tag-based invalidation. Let’s look at some use cases where tagging pages together might be […]

Search Engine Optimization (SEO) is the practice of optimizing your website to rank higher on search engine results pages. Since organic search is a primary way for viewers to discover online content, a solid SEO strategy involves optimizing your web application and maintaining good performance. As more than 92% of the internet searches happen on […]

Many types of organizations encounter DDOS attacks daily. DDoS, or Distributed Denial of Service, is an attack pattern that generates fake traffic to overwhelm organisation’s properties (websites, APIs, applications, etc.) and make it unavailable to legitimate users. They majority of these attacks involve a huge burst of fake traffic that exhausts the application’s resources (Memory […]

As organizations grow, they must often serve geographically dispersed users with low latency, prompting them to have a distributed global infrastructure in the cloud. In this article, we describe how to deploy global API endpoints to reduce latency for end-users while increasing an application’s availability. By using the AWS Global Network and Amazon CloudFront to deploy applications into multiple […]

In this post, you’ll learn about the ‘multi-function packager’ framework that handles the assembly and execution of discrete Edge functions. Amazon CloudFront is a content delivery network (CDN) service that improves the performance, availability, and security of your application, allowing you to serve a consistent experience to your viewers globally. Lambda@Edge and CloudFront Functions are the […]

Introduction In this blog post, we will explain how you can use Lambda@Edge to authorize requests to Amazon CloudFront by forwarding authorization data to external authorization servers. We will outline the sequence of requests in such a workflow, the steps for implementation with Node.js sample code, and a CloudFormation template for a simple external test […]

Search engine crawlers – a special bot type used to index your site – are very important visitors. They make sure that your content is searchable by end users. If a crawler can’t easily read your content, then any updates you make might not be immediately reflected in the search results. Depending on the algorithms […]