Files
seaweedfs/weed/s3api/s3_constants
f99c4a1f14 s3: make RenameObject idempotent for a retried request (#11178)
* feat(s3): make RenameObject idempotent for a retried request - #10661

A rename that succeeds but whose response is lost leaves the client with
no safe move: retrying returned 404, because the source is already gone,
so a retry was indistinguishable from a rename that never happened.

The destination now carries what the rename that created it was, under
x-seaweedfs-rename-token: the client's token, the source key and the
time. A retry that names the same token and the same source and
destination is answered 200 without touching anything. The same token
sent for a different rename is refused with 409 rather than silently
answered, and a token older than 24 hours is treated as unrelated so a
key cannot answer for a request indefinitely.

Requests without the header behave exactly as before.

* s3: answer a reused rename token with 409, not 400

The PR promised Conflict and the code returned Bad Request. 400 tells a
client its request was malformed and invites it to give up; this request
is well formed and resending it unchanged will not help, because what it
collides with is a rename the same token already stands for.

The status code is now asserted in a test, since it is the part of this
behaviour a client actually acts on.

* Update weed/s3api/s3err/s3api_errors.go

Co-authored-by: devin-ai-integration[bot] <158243242+devin-ai-integration[bot]@users.noreply.github.com>

* s3: fix rename token review notes

- ErrIdempotentParameterMismatch returns 409 Conflict, not 400. The
  comment and TestRenameTokenReuseAnswersConflict both expect 409; the
  code regressed to 400 in a later commit.
- stampRenameToken: clarify that markRenameToken mutates srcEntry in
  place, so the token reaches the destination via the move regardless
  of whether the UpdateEntry succeeds. The precondition only guards the
  pre-move write, not the move itself.
- Extract the handler retry branch into retryRenameDecision and add
  TestRetryRenameDecision, covering the source-still-exists fallthrough
  that was previously reasoned about but not tested.

* s3: IdempotentParameterMismatch returns 400, matching AWS docs

The AWS S3 RenameObject API documentation specifies HTTP Status Code: 400
for IdempotencyParameterMismatch. Revert the previous 409 change and align
the comment and test with the documented behavior.

---------

Co-authored-by: Chris Lu <chrislusf@users.noreply.github.com>
Co-authored-by: devin-ai-integration[bot] <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Chris Lu <chris.lu@gmail.com>
2026-09-05 11:48:42 -07:00
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2025-08-22 01:15:42 -07:00