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I thought I understood what the Http Header "Cache-Control: max-age=3600" meant but then I came across it in a client request as this:
Cache-Control: max-age=0
I'm not entirely sure what this means from a client's perspective.
Any insight would be great.
Thanks
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Client cache is the most efficient type of caching, because it allows browsers to access files without communicating with the web server. The system controls client caching by modifying the HTTP headers of file request responses. To configure client-side file caching: Open the. application.
By using cache-control:private, you are specifying that it shouldn't cache the page (but allowing the final user to do so). If you use cache-control: public, you are saying that it's okay for everyone to cache the page, and so the proxy would keep a copy.
Cache-Control HeaderIndicates that resource is cacheable by any component. 2. Private. Indicates that resource is cacheable only by the client and the server, no intermediary can cache the resource. 3.
The default cache-control header is : Private. A cache mechanism may cache this page in a private cache and resend it only to a single client. This is the default value. Most proxy servers will not cache pages with this setting.
The answer is explained here: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.4
When used by user agents, its aim is to get intermediate caches to revalidate the response - so it's not for the server to deal with.
In server responses, max-age tells the client (and intermediate caches) how long to cache the response for.
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