Do all web caches understand the "Cache-Control" HTTP header?

Posted by chris_l on Server Fault See other posts from Server Fault or by chris_l
Published on 2010-06-09T09:59:16Z Indexed on 2010/06/09 15:42 UTC
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Filed under:

webserver

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http

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caching

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http-headers

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http-proxy

I'd like to avoid the "Expires" header, and use "Cache-Control" only - or maybe the other way around. The headers will account for a significant percentage of my traffic, so I'd prefer not to "use both".

AFAIK, the "Cache-Control" header was standardized in HTTP 1.1, but are there still web caches/proxies in use, which don't understand it?

Note: This could help answering a part of my stackoverflow (bounty) question

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