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https://issues.apache.org/jira/browse/TS-2589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13957893#comment-13957893
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ASF subversion and git services commented on TS-2589:
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Commit f4388232d4f04dd4d728c6cc5f895561a369375a in trafficserver's branch
refs/heads/master from [~nottheoilrig]
[ https://git-wip-us.apache.org/repos/asf?p=trafficserver.git;h=f438823 ]
TS-2589: don't hold up the response until the server starts sending content
If there is a transform (for example a null transform) then the
response headers aren't forwarded until the origin server starts
sending content. Normally (without a transform) the headers are
forwarded as soon as they are done, whether content is available
yet or not.
The headers are sent when the transform calls TSVConnWrite() and
the transform is called at the end of the headers/start of the
content. But it's not called if the available content is empty. A
possible fix is to call the transform at the start of the content
whether content is available yet or not. This doesn't affect a
buffered transform which can still delay and update the headers
until it calls TSVConnWrite().
GitHub: This closes #49
> Headers delayed until the origin server starts sending content
> --------------------------------------------------------------
>
> Key: TS-2589
> URL: https://issues.apache.org/jira/browse/TS-2589
> Project: Traffic Server
> Issue Type: Bug
> Reporter: Jack Bates
> Assignee: James Peach
> Fix For: 5.0.0
>
>
> If there is a transform (for example a null transform) then the response
> headers aren't forwarded until the origin server starts sending content.
> Normally (without a transform) the headers are forwarded as soon as they are
> done, whether content is available yet or not.
> The headers are sent when the transform calls TSVConnWrite() and the
> transform is called at the end of the headers/start of the content. But it's
> not called if the available content is empty. A possible fix is to call the
> transform at the start of the content whether content is available yet or
> not. This doesn't affect a buffered transform which can still delay and
> update the headers until it calls TSVConnWrite()
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