Secure GraphQL Subscriptions in Elixir with Absinthe

Real-time communication is a powerful feature of modern web applications, but securing live data streams presents unique challenges. This text-based course guides you through the essential concepts of managing and securing real-time GraphQL subscriptions in Elixir. You will start with the foundational concepts of WebSocket connections, token-based authentication, and how Absinthe manages stateful subscription fields. From there, you will learn how to design robust authorization checks that protect sensitive data before it ever reaches connected clients. By completing this course, you will be able to implement secure, scoped subscription topics and handle authorization changes dynamically without compromising performance. What you'll learn: - Understand the core architecture of GraphQL subscriptions and WebSockets in Elixir - Implement secure token-based authentication for stateful socket connections - Authorize subscription requests using Absinthe context and custom middleware - Scope real-time topics so users only receive data they are authorized to see - Handle connection lifecycles and dynamic authorization updates - Apply modern security best practices to prevent unauthorized data leaks in real-time streams This course begins with essential definitions and architectural overviews before moving into step-by-step implementation patterns and practical code scenarios. You will read detailed explanations, analyze structured code snippets, and learn how to structure your Phoenix and Absinthe applications for maximum security. This course is designed for backend developers, Elixir enthusiasts, and API designers who want to secure their real-time GraphQL endpoints. No advanced security background is required, but a basic familiarity with Elixir and GraphQL is recommended. Start reading today to build secure and reliable real-time APIs with Absinthe.