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Date: Thu, 6 Mar 2025 17:03:57 +0900
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* fix(backend/object-storage): disable data integrity protections (MisskeyIO#895)

Cloudflare R2 does not support 'x-amz-checksum-*'

* Update Changelog

---------

Co-authored-by: あわわわとーにゅ <17376330+u1-liquid@users.noreply.github.com>
---
 CHANGELOG.md                           | 2 ++
 packages/backend/src/core/S3Service.ts | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b9aefe58a..21c589376 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,8 @@
 
 ### Server
 - Fix: 特定のケースでActivityPubの処理がデッドロックになることがあるのを修正
+- Fix: S3互換オブジェクトストレージでファイルのアップロードに失敗することがある問題を修正  
+  (Cherry-picked from https://github.com/MisskeyIO/misskey/pull/895)
 
 
 ## 2025.2.1
diff --git a/packages/backend/src/core/S3Service.ts b/packages/backend/src/core/S3Service.ts
index 37721d2bf..968a5dcc0 100644
--- a/packages/backend/src/core/S3Service.ts
+++ b/packages/backend/src/core/S3Service.ts
@@ -46,6 +46,8 @@ export class S3Service {
 			tls: meta.objectStorageUseSSL,
 			forcePathStyle: meta.objectStorageEndpoint ? meta.objectStorageS3ForcePathStyle : false, // AWS with endPoint omitted
 			requestHandler: new NodeHttpHandler(handlerOption),
+			requestChecksumCalculation: 'WHEN_REQUIRED',
+			responseChecksumValidation: 'WHEN_REQUIRED',
 		});
 	}