Patch to handle missing CRC64NVME checksums #9
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This fixes issue #8.
Description of changes:
Added a few lines to handle the empty checksum values (e.g.
'Checksum': {}) being returned byboto3.client("s3").get_object_attributes()when an object has a CRC64NVME checksum, as shown in the issue. It seems that the CRC64NVME checksum algorithm was added on 2024-12-01, and presumably, there's an issue in some related code (which I don't know how to track down) such that the object metadata isn't being updated properly when that type of checksum is generated.