Re-implement http client using fetch#35
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robinheghan merged 4 commits intogren-lang:mainfrom Aug 25, 2025
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Fetch needs `duplex: half` when setting a stream request body. https://developer.chrome.com/docs/capabilities/web-apis/fetch-streaming-requests#half_duplex This also adds an error case to the legacy streams api when configuring a request with `withStreamBody`
andrewMacmurray
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This re-implements the http client using node's builtin
fetchapi. We did this is for a few reasons:Streaming requests and responses
The
fetchapi natively supports streaming request and response bodies, so it's pretty trivial to implement:withStreamBodyexpectStreamThis means we can work with native
gren/core/Streams when making http requests 🎉 .Legacy streaming api
For now we've left the custom stream api so we don't have to make a breaking change, and we'll aim to remove this around the December release.
Follow up work
After this change when a stream error occurs during an http request an
UnknownErrorwill be returned.Ideally we'd like to get a structured error for this case, but we haven't arrived yet at the right design for this (can we only include this error case for streaming requests so non streaming request don't need to handle it?).