enhancement: flexible checksums #2999
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Description of changes:
Adds default checksum calculation, deprecates the
AddContentMD5config option as S3 plans to deprecate MD5 checksums soon, adds two S3 client config options:request_checksum_calculationandresponse_checksum_validationwith acceptable values for both being eitherwhen_supportedorwhen_required.request_checksum_calculationwill default towhen_supported, which means if an operation supports checksum calculation (indicated via modeling), the SDK will calculate the checksum and add the appropriate header. If it is set towhen_required, the SDK will only compute and send a checksum when the operation requires anhttpRequestChecksum.response_checksum_validationalso defaults towhen_supported, which means if an operation models response algorithms, an attempt to validate a response checksum will be made.when_requiredwill only validate response checksums when response checksum are modeled ANDChecksumModeis set toenabledon the command.By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.