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https://issues.apache.org/jira/browse/TS-1468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13816409#comment-13816409
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Bryan Call commented on TS-1468:
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Talked to Mark Nottingham about checking Vary and Accept on all response codes
(2xx, 3xx, 4xx, 5xx) and he didn't see any issues with it.
> vary and accept* are ignored in cache for non-200 responses from the origin -
> webdav
> ------------------------------------------------------------------------------------
>
> Key: TS-1468
> URL: https://issues.apache.org/jira/browse/TS-1468
> Project: Traffic Server
> Issue Type: Bug
> Components: HTTP
> Affects Versions: 3.3.0, 3.2.0
> Reporter: Bryan Call
> Assignee: Bryan Call
> Fix For: 4.2.0
>
> Attachments: ts1468.diff
>
>
> ATS doesn't look at the Accept* and vary headers when trying to find an
> alternate in cache for non-200 responses from the origin.
> Webdav is effected because of 207 response from the origin and ATS doesn't
> check the Accept* and vary headers. If there is gzipped data in cache and a
> non-gzipped request comes in, the gzipped version will be handed back to the
> client.
> There is an option for YTS to always look at the Accept* and vary headers,
> but it is not in ATS.
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