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November 2, 2024

[Python] FastAPI Using Server-Sent Events (SSE) for Streaming Responses

Last Updated on 2024-11-02 by Clay

I have recently set up numerous backend API servers for Chatbots. Initially, I received user messages and returned the entire LLM-generated reply in one go to the frontend interface. However, this approach did not provide a good user experience. I then switched to HTTP streaming, sending each generated token to the frontend as it was produced. Later, I found that some users' devices experienced packet sticking, so I finally switched to using WebSocket.

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