Summary

In this chapter, you've learned how to work with one of the latest web technologies available: WebSocket. You are now able to open a two-way communication channel between a client and a server, allowing you to implement applications with real-time constraints. As you've seen, FastAPI makes it very easy to add such endpoints. Still, the way of thinking inside a WebSocket logic is quite different from traditional HTTP endpoints: managing an infinite loop and handling several tasks at a time are completely new challenges. Fortunately, the asynchronous nature of the framework makes our life easier in this matter and helps us write concurrent code that is easily understandable.

Finally, we also had a quick overview of the challenges to solve when handling multiple clients that share messages between them. You saw that message broker software such as Apache Kafka or RabbitMQ is necessary to make this use case reliable across several server processes.

You are now acquainted...