n374 30d3aca600 feat(attachments): support HTTP Range resume on proxy download (MUL-3962) ...

Add HTTP Range support to the attachment proxy-download path so an interrupted
download can resume from where it left off instead of restarting at byte 0.

- Seekable backends (local disk) delegate to http.ServeContent for full
  Range / If-Range / 206 / Content-Range / 416 handling.
- Forward-only backends (S3/MinIO streaming) get a single-range fallback that
  advertises Accept-Ranges and serves 206 + Content-Range, with a
  rangeParseOutcome that returns 416 only for genuinely unsatisfiable byte
  ranges and otherwise ignores unsupported/empty-object ranges (full 200),
  matching the seekable path.

Closes #4831. MUL-3962.

2026-07-07 12:38:07 +08:00

68 KiB

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