Make Solr more friendly to external HTTP caches
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Key: SOLR-127
URL: https://issues.apache.org/jira/browse/SOLR-127
Project: Solr
Issue Type: Wish
Reporter: Hoss Man
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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