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fix(platform): stop emitting content-length in HttpClientRequest.setBody #6265

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fix(platform): stop emitting content-length in HttpClientRequest.setBody #6265

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768dc73
fix(platform): stop emitting content-length in HttpClientRequest.setBody
sijie-Z Jun 8, 2026
259b088
chore: add changeset
sijie-Z Jun 9, 2026
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5 changes: 5 additions & 0 deletions .changeset/fix-content-length-request.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"@effect/platform": patch
---

fix: stop emitting content-length header in HttpClientRequest.setBody
8 changes: 3 additions & 5 deletions packages/platform/src/internal/httpClientRequest.ts
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Expand Up @@ -394,11 +394,9 @@ export const setBody = dual<
if (contentType) {
headers = Headers.set(headers, "content-type", contentType)
}

const contentLength = body.contentLength
if (contentLength) {
headers = Headers.set(headers, "content-length", contentLength.toString())
}
// Do not set content-length here — the transport layer (fetch/undici)
// computes the correct value from what it actually sends on the wire.
// See https://github.com/Effect-TS/effect/issues/6240
}
return makeInternal(
self.method,
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