Question 1

How do I add authentication to fastapi-socketio connections?

Accepted Answer

fastapi-socketio doesn't provide built-in authentication; you can use FastAPI's dependency injection or middleware to validate tokens before handling events, and refer to Socket.IO's documentation for session management patterns.

Question 2

fastapi-socketio or fastapi-websockets: which one should I use?

Accepted Answer

Choose fastapi-socketio if you need Socket.IO features like rooms, namespaces, and fallback mechanisms for broader client compatibility. Opt for fastapi-websockets if you require raw WebSocket support without additional protocol overhead.

Question 3

Can I use fastapi-socketio with background tasks like Celery?

Accepted Answer

Yes, its async event handlers allow integration with background task queues, but ensure proper async handling to avoid blocking the event loop in FastAPI, as demonstrated in the async support feature.

Question 4

How to scale fastapi-socketio with multiple server instances?

Accepted Answer

Scaling requires configuring Socket.IO with a message broker like Redis for its adapter; fastapi-socketio itself doesn't include scaling solutions, so you need to set this up separately based on Socket.IO's guidelines.

Question 5

Does fastapi-socketio support Socket.IO rooms and namespaces?

Accepted Answer

Yes, it provides access to all Socket.IO functionality through the SocketManager instance, including rooms and namespaces, as it's a thin wrapper around the python-socketio library.

Question 6

How to test fastapi-socketio event handlers in my app?

Accepted Answer

You can write tests using pytest and mock the Socket.IO server or client; the library's test suite in the repository offers examples for setting up test environments and simulating real-time events.

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