Building Highly Scalable Serverless WebSocket Infrastructure on AWS

This article outlines a solution for building a scalable WebSocket infrastructure using Serverless architecture on AWS. WebSocket requires a long-running process on the server, but serverless functions are short-lived. To overcome this, the article suggests using Amazon API Gateway, Amazon Lambda Functions (Python), Amazon DynamoDB, and AWS CDK (Python SDK).

The article describes the step-by-step process for creating a WebSocket infrastructure using AWS CDK in Python, including creating a stack, creating a DynamoDB connection table, defining a Lambda function, managing the connection ID, adding authorization, setting up WebSocket routing, creating a WebSocketStage to expose the API to the public, and sending messages from Lambda.

Overall, this infrastructure can serve as a base for scalable WebSocket connections.