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Mar 12, 2025
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chore(supplemental-docs): md5 fallback for DeleteObjects update #6932

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chore(supplemental-docs): md5 fallback for DeleteObjects update
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3 changes: 1 addition & 2 deletions supplemental-docs/MD5_FALLBACK.md
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Expand Up @@ -6,8 +6,7 @@ In AWS SDK for JavaScript [v3.729.0](https://github.com/aws/aws-sdk-js-v3/releas
we shipped a feature that [changed default object integrity in
S3](https://github.com/aws/aws-sdk-js-v3/issues/6810). The SDKs now default to using more modern
checksums (like CRC32) to ensure object integrity, whereas previously MD5 checksums were being used.
Some third-party S3-compatible services currently do not support these checksums. To our knowledge,
this affects only the S3 `DeleteObjects` operation.
Some third-party S3-compatible services currently do not support these checksums and require MD5 checksums. Furthermore, the `DeleteObjects` operation in S3 [requires a `Content-MD5` request header](https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteObjects.html) in which case too, you should use the MD5 fallback as noted below.

If you wish to fallback to the old behavior of sending MD5 checksums, for operations like
`DeleteObjectsCommand` this is how you can do it in AWS SDK for JavaScript v3:
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