A practical guide to building WebSocket connections in Python, starting from the bare websockets library and progressing to FastAPI. Covers setting up a basic server and client, sending text and binary file data, connecting to external WebSocket servers, and handling disconnections gracefully in FastAPI using WebSocketDisconnect. Key differences between the plain websockets library and FastAPI's WebSocket API are highlighted, including the need to explicitly call websocket.accept() and how Uvicorn manages the event loop.
Table of contents
WebSocket Connections and MethodsHow to Build Your First WebSocket in PythonFile Transfer Over WebSocketsHow to Connect to an External WebSocketWebSockets in FastAPIHow to Handle WebSocket Disconnections in FastAPIConclusionSort: