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Posted to dev@hc.apache.org by "Jon Moore (JIRA)" <ji...@apache.org> on 2014/11/12 22:27:35 UTC
[jira] [Commented] (HTTPCLIENT-1579) CacheValidityPolicy does not
correctly handle 304 Not Modified freshness
[ https://issues.apache.org/jira/browse/HTTPCLIENT-1579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14208730#comment-14208730 ]
Jon Moore commented on HTTPCLIENT-1579:
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Hi, do you have an example client/server exchange (including headers) that illustrates this issue? Even better: do you have a unit test that can illustrate your specific scenario? Either one would be helpful in diagnosing the issue. In particular, the caching module does update cache entry headers when it receives an origin 304 (and there are tests that cover that behavior), so more detail would be helpful to understand how your scenario is different from the ones we've contemplated already.
Thanks!
> CacheValidityPolicy does not correctly handle 304 Not Modified freshness
> ------------------------------------------------------------------------
>
> Key: HTTPCLIENT-1579
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1579
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient
> Affects Versions: 4.3.3, 4.3.4, 4.3.5, 4.3.6
> Reporter: Nitin Kumar
>
> When a cached response expires, http cache client correctly makes a new request to the http server. When the response is still fresh at the server side, the server responds with HTTP/1.1 304 Not Modified and sends in a new Expires: header.
> On subsequent request, when the cache entry should be still valid as per the time stamp received in the Expires header from the last call, CacheValidityPolicy tries to validate the cache entry in the isResponseFresh() method and incorrectly marks the the entry as stale.
> The result is that http cache client keeps making new requests to the http server.
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