Debugging a mysterious HTTP streaming issue

19 days ago

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Encountered HTTP response streaming issues with AI SDK and Node stream API
Streaming worked with cURL and Postman but failed with node-fetch and browser fetch
Initial hypothesis was HTTP/2 compliance issues with web streams vs Node streams
Discovered a temporary fix using a Cloudflare worker as middleware
Ruled out HTTP version differences as the root cause
Suspected header stripping ('Transfer-Encoding', 'Connection', 'Content-Encoding') as the issue
Learned about dynamic responses and HTTP streaming mechanics
Breakthrough came from noticing cURL's lack of 'Accept-Encoding' header by default
Identified compression as the root cause and disabled it in Cloudflare
Realized this was a recurring issue previously encountered at Trieve
Highlighted Cloudflare's unpredictable behavior with silent configuration changes
Lessons: compression breaks streaming, cURL vs fetch differences, Cloudflare workers as debugging tools, importance of source availability, and team knowledge sharing

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