Build Your Own Waiting Room for Your Website with Cloudflare Workers and Serverless Redis

The blog post discusses implementing a waiting room page for websites using Cloudflare Workers and Upstash Redis to manage high traffic surges without overwhelming web applications. It explains the necessity of a waiting room to control visitor influx, thereby protecting web resources. The solution uses Cloudflare Workers for low-latency, serverless request interception, and Upstash Redis for external state management due to its REST API compatibility and global replication. The proposed implementation involves setting parameters for maximum session duration and website capacity, generating unique session keys, and managing them via Redis to determine access eligibility. Visitors are redirected to a static HTML waiting room page that refreshes every 30 seconds to check for access availability. The blog emphasizes the minimal performance overhead of this setup and outlines the step-by-step implementation process, including project setup, configuration, and deployment instructions. It concludes by acknowledging potential enhancements like estimating waiting time and maintaining a fair queue, suggesting that these require additional state management and are thus not included in the current solution.