𝗗𝗲𝗯𝘂𝗴𝗴𝗶𝗻𝗴 𝗔𝗜 𝗦𝘁𝗿𝗲𝗮𝗺𝗶𝗻𝗴

𝗗𝗲𝗯𝘂𝗴𝗴𝗶𝗻𝗴 𝗔𝗜 𝗦𝘁𝗿𝗲𝗮𝗺𝗶𝗻𝗴

I spent three weeks building an AI chat interface. I wanted a smooth stream of words. I got dead connections and broken sentences.

My app used FastAPI and React. Short answers worked. Long answers cut off mid-word. The server stopped sending data.

I tried to fix it. I increased the timeout. It did not work. I added a retry loop. This created duplicate words.

The problem was the parser. The AI API sends lines of data. My code closed the connection too early. It did not wait for the end signal.

Here is the fix:

• Use aiter_bytes instead of aiter_lines.
• Manage the line buffer manually.
• Look for the [DONE] signal to stop.

Then my UI froze. The server sent 50 chunks per second. React failed to keep up. I added a small delay on the server to throttle the data.

Lessons for you:

• Read the streaming spec first.
• Do not assume a blank line means the end.
• Use a library for SSE parsing.
• Track chunk counts and delays.

Streams are messy. They have quirks. Never trust a stream to end gracefully.

What is your weirdest streaming bug?

Source: https://dev.to/__c1b9e06dc90a7e0a676b/debugging-ai-streaming-a-tale-of-chunks-and-timeouts-1p6m Optional learning community: https://t.me/GyaanSetuAi