Where in the code is the hash of each part provided during an upload?

[jonbesga]

Hi!

According to #1699 and #845. Boto3 doesn't make an integrity check of multipart uploads but it does send an md5 hash for each part so S3 will complain is there's a mismatch. I'm trying to find the code that does that in the boto3 and s3transfer code but I can't find it.

Could anyone point me to the code that's managing this part?

Thanks

[kyleknap]

Yep. The md5's are calculated as a part of this handler registration which calls out to these functions to calculate the md5 of the request body and put it in the request header. Hope this helps!

[jonbesga]

Thanks! I missed looking into botocore