Test New Features and Iterate Quickly with Cloudflare Workers

Remy Guercio
7 min readintermediate
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Overview

The article discusses how to leverage Cloudflare Workers to quickly test new features and iterate based on user feedback. It emphasizes the importance of early access for select users and provides practical recipes for managing feature access securely and efficiently.

What You'll Learn

1

How to securely cache user permissions with Cloudflare Workers

2

How to restrict API access based on user permissions

3

How to implement A/B testing for new API versions

4

How to route requests to different API versions using Cloudflare Workers

Prerequisites & Requirements

  • Basic understanding of APIs and user permissions
  • Familiarity with Cloudflare Workers(optional)

Key Questions Answered

How can I securely cache user permissions using Cloudflare Workers?
You can securely cache user permissions by making a fetch request to your origin server with a token. The response can be cached using Cloudflare's caching capabilities, allowing subsequent requests to access permissions without hitting the origin again, thus improving performance.
What are common methods for gating new features in Cloudflare Workers?
Common methods include restricting API paths based on user permissions, implementing A/B testing for different user groups, and routing requests to different origins based on the API version. These methods help manage feature rollouts effectively.
What precautions should I take when caching sensitive information?
When caching sensitive information like user permissions, ensure that the URLs are not publicly accessible and are only accessible from within a Cloudflare Worker. This prevents unauthorized access to sensitive data.

Technologies & Tools

Backend
Cloudflare Workers
Used for deploying serverless functions that handle requests and manage feature access.

Key Actionable Insights

1
Implement caching for user permissions to improve application performance.
By caching user permissions in Cloudflare Workers, you can reduce the number of requests to your origin server, leading to faster response times and improved user experience.
2
Use feature gating to control access to new API versions.
This approach allows you to gradually roll out new features to specific user groups, minimizing the risk of widespread issues while gathering valuable feedback.
3
Leverage A/B testing to evaluate new documentation or API features.
A/B testing helps ensure that changes improve user engagement and do not negatively impact performance metrics before a full rollout.

Common Pitfalls

1
Storing sensitive information in publicly accessible URLs.
This can lead to unauthorized access to sensitive data. Always ensure that sensitive endpoints are protected and only accessible through secure channels.

Related Concepts

API Versioning
User Permissions Management
Feature Rollout Strategies