Hi,

I'm skeptical that this is a future proof solution, since
https://docs.aws.amazon.com/AmazonS3/latest/API/API_Object.html
just says that "If an object is created by either the Multipart
Upload or Part Copy operation, the ETag is not an MD5 digest, regardless
of the method of encryption.". If there is no documentation from AWS
about how to compute the ETag for these cases, we should not attempt to
do so.


Best,
-Nikolaus

On Jun 15 2023, Peter Marshall <[email protected]> wrote:
> I found this info on how to calculate Etags on a local file:
>
> https://teppen.io/2018/06/23/aws_s3_etags/ and the linked
> https://teppen.io/2018/10/23/aws_s3_verify_etags/
>
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