feat: add default e2e checksum validation in the final call of resumable uploads#3450
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ShreyasSinha merged 3 commits intomainfrom Dec 23, 2025
Merged
feat: add default e2e checksum validation in the final call of resumable uploads#3450ShreyasSinha merged 3 commits intomainfrom
ShreyasSinha merged 3 commits intomainfrom
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If a crc32cMatch or md5Match are not specified when creating the resumable upload, a running checksum will be computed and included in the finalization call. * Add plumbing logic for capture/restore logic of BlobWriteChannelV2 * Add JsonResumableWrite hasher and cumulativeCrc32c to track the hasher and running checksum when necessary * Update JsonResumableSession to send cumulativeCrc32c when finalizing, and to update the running crc32c when a successful result is received * Add integration tests to ITJsonResumableSessionTest to verify checksum is sent and correctly computed, even when retried or partial consumed * Update Hasher.nullSafeConcat to be type dependent upon the left hand side provided type
ShreyasSinha
approved these changes
Dec 23, 2025
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Modified the final api call of resumable uploads to include the "x-goog-hash" header for e2e checksum validation on the json path. A running checksum is automatically calculated and sent during the finalization request if no crc32cMatch or md5Match is provided at the start of the resumable upload
Fixes: b/461983980