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https://issues.apache.org/jira/browse/HDDS-13920?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chu Cheng Li updated HDDS-13920:
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Component/s: Ozone Manager
> Conditional Reads (GetObject, HeadObject)
> -----------------------------------------
>
> Key: HDDS-13920
> URL: https://issues.apache.org/jira/browse/HDDS-13920
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: Ozone Manager, s3gateway
> Reporter: Chu Cheng Li
> Assignee: Chu Cheng Li
> Priority: Major
>
> See release 2.37.0 (Add conditional writes in CopyObject on destination key
> to prevent unintended object modifications.
> ---
> Headers
> * If-Match: - Returns object only if ETag matches
> * Returns 412 Precondition Failed if ETag doesn't match
> * If-None-Match: - Returns object only if ETag doesn't match
> * Returns 304 Not Modified if ETag matches
> * If-Modified-Since: - Returns object only if modified after timestamp
> * Returns 304 Not Modified if not modified
> * If-Unmodified-Since: - Returns object only if not modified since timestamp
> * Returns 412 Precondition Failed if modified
> Evaluation Order
> 1. If-Match is evaluated first
> 2. If-Unmodified-Since is evaluated next
> 3. If-None-Match is evaluated
> 4. If-Modified-Since is evaluated last
> If multiple conditions are present, they must all be satisfied.
> Error Codes
> * 304 Not Modified - For If-None-Match and If-Modified-Since failures (cache
> hits)
> * 412 Precondition Failed - For If-Match and If-Unmodified-Since failures
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