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tapir/internal/metrics
mathiasandClaude Opus 5.5 b106b0dab3
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fix(uploads): bound the silence in an upload body with a re-armed read deadline
A body that stopped arriving held one of the receive slots (#47) and a
spool file indefinitely. Every read of the upload body now pushes the
connection read deadline UploadIdleTimeout (default 60 s) ahead, so a
stalled body fails its read, Accept returns and the slot is released,
while a slow but moving body is never cut (ReadTimeout would cut it).

Two things found by running it over a socket:
- metrics.statusWriter had no Unwrap, so http.ResponseController could
  not reach the connection and the bound silently did not apply in the
  production handler stack. It now unwraps; a writer that still cannot
  set a deadline logs "upload idle bound unavailable".
- clearing the deadline on any read error left net/http's pre-reply
  drain of the unread remainder unbounded, so the connection hung. The
  deadline is now cleared only on a clean io.EOF.

ADR-033 limitation amended. A 1-byte-per-59-s drip is still unbounded.

Closes #56

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-04 22:57:33 +02:00
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