Setting up WebSockets in FastAPI

WebSockets provide a powerful mechanism for establishing full-duplex communication channels between clients and servers, allowing real-time data exchange. In this recipe, you’ll learn how to establish a connection with WebSocket functionality in your FastAPI applications to enable interactive and responsive communication.

Getting ready

Before diving into the recipe, ensure you have all the required packages in your environment. You can install them from the requirements.txt file provided in the GitHub repository or install it manually with pip:

$ pip install fastapi[all] websockets

Since the swagger documentation does not support WebSocket, we will use an external tool to test the WebSocket connection, such as Postman.

You can find instructions on how to install it on the website: https://www.postman.com/downloads/.

The free community version will be enough to test the recipes.

How to do it…

Create the project root...