Hello all.

I am trying to use S3 storage (s3Ninja for "unit test") and I am really
messed about how it works.
Simple process
[image: image.png]

I fetch a simple PDF content and try to post to s3.
But in the resulting content, I found the first line :
20000;chunk-signature=c0d176ad5f54df79ca61a1de74d71731f3bf2e92972d7c5ca25f79d83b99b63f

I am trying to google this, and I found that it may come from chunk upload.
But the file is small, less than 1 Mo.

It is also the case with simple text file.

I use Wireshark to track traffic, and I found that there is the signature
added during the call.

Also, I always have an exception saying the signature is not valid :
com.amazonaws.SdkClientException: Unable to verify integrity of data
upload. Client calculated content hash (contentMD5:
RJHSWwvsGtV1rweS3gmThQ== in base 64) didn't match hash (etag:
9a86aae10bb9318d22c3ddea1f93fd07 in hex) calculated by Amazon S3.  You may
need to delete the data stored in Amazon S3. (metadata.contentMD5: null,
md5DigestStream:
com.amazonaws.services.s3.internal.MD5DigestCalculatingInputStream@239e8a25,
bucketName: renditions, key: 43cc8b40-0f36-4bb4-9ad6-ea079ecbd5a1.pdf)

Any idea or input for investigation ?

Regards

Etienne Jouvin

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