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https://issues.apache.org/jira/browse/SOLR-127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12567077#action_12567077
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Fuad Efendi commented on SOLR-127:
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Thomas, Walter,
Finally I agree, thanks!
Middleware should not send/reroute "If-Modified-Since", and should not
implement internal cache (in provided by me "contr"-sample): with caching
enabled, it will simply retrieve cached content.
I do not agree with 400, it is place for DoS attacks. "Query parsing error"
should be 200 with caching response codes. Of course, I know RFC 2616.
> Make Solr more friendly to external HTTP caches
> -----------------------------------------------
>
> Key: SOLR-127
> URL: https://issues.apache.org/jira/browse/SOLR-127
> Project: Solr
> Issue Type: Wish
> Reporter: Hoss Man
> Assignee: Hoss Man
> Fix For: 1.3
>
> Attachments: CacheUnitTest.patch, CacheUnitTest.patch,
> HTTPCaching.patch, HTTPCaching.patch, HTTPCaching.patch, HTTPCaching.patch,
> HTTPCaching.patch, HTTPCaching.patch, HTTPCaching.patch, HTTPCaching.patch,
> HTTPCaching.patch, HTTPCaching.patch, HTTPCaching.patch, HTTPCaching.patch,
> HTTPCaching.patch, HTTPCaching.patch, HTTPCaching.patch, HTTPCaching.patch,
> HTTPCaching.patch, HTTPCaching.patch, HTTPCaching.patch, HTTPCaching.patch,
> HTTPCaching.patch, HTTPCaching.patch, HTTPCaching.patch
>
>
> an offhand comment I saw recently reminded me of something that really bugged
> me about the serach solution i used *before* Solr -- it didn't play nicely
> with HTTP caches that might be sitting in front of it.
> at the moment, Solr doesn't put in particularly usefull info in the HTTP
> Response headers to aid in caching (ie: Last-Modified), responds to all HEAD
> requests with a 400, and doesn't do anything special with If-Modified-Since.
> t the very least, we can set a Last-Modified based on when the current
> IndexReder was open (if not the Date on the IndexReader) and use the same
> info to determing how to respond to If-Modified-Since requests.
> (for the record, i think the reason this hasn't occured to me in the 2+ years
> i've been using Solr, is because with the internal caching, i've yet to need
> to put a proxy cache in front of Solr)
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