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From "LiXin Ge (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDDS-517) Implement HeadObject REST endpoint
Date Sun, 30 Sep 2018 09:25:00 GMT

    [ https://issues.apache.org/jira/browse/HDDS-517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16633326#comment-16633326
] 

LiXin Ge commented on HDDS-517:
-------------------------------

Upload the initial patch:
1. The treatment of exceptions is temporary, will come back to optimize it after HDDS-560
is merged.
2.Range retrieval requests is not fully supported in this patch, because our ClientProtocol
of Ozone haven't support range read.

> Implement HeadObject REST endpoint
> ----------------------------------
>
>                 Key: HDDS-517
>                 URL: https://issues.apache.org/jira/browse/HDDS-517
>             Project: Hadoop Distributed Data Store
>          Issue Type: Sub-task
>            Reporter: Elek, Marton
>            Assignee: LiXin Ge
>            Priority: Major
>              Labels: newbie
>         Attachments: HDDS-517.000.patch
>
>
> The HEAD operation retrieves metadata from an object without returning the object itself.
This operation is useful if you are interested only in an object's metadata. To use HEAD,
you must have READ access to the object.
> Steps:
>  1. Look up the volume
>  2. Read the key and return to the user.
> The AWS reference is here:
> https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectHEAD.html
> We have a simple version of this call in HDDS-444 but without Range support.



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