Flowdock
method

expires_in

Importance_2
v3.0.9 - Show latest stable - 1 note - Class: ActionController::ConditionalGet
expires_in(seconds, options = {}) public

Sets a HTTP 1.1 Cache-Control header. Defaults to issuing a “private” instruction, so that intermediate caches shouldn’t cache the response.

Examples:

expires_in 20.minutes
expires_in 3.hours, :public => true
expires in 3.hours, 'max-stale' => 5.hours, :public => true

This method will overwrite an existing Cache-Control header. See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html for more possibilities.

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April 10, 2013 - (v3.2.1 - v3.2.13)
2 thanks

be aware that this writes to tmp/cache

Its supposed to be http caching, but Rails will actually cache the response to whatever you specified as the cache store, *as well*, but only if you specify :public => true. The default is filestore so it will try to write to tmp/cache.

Only a problem if you don’t have the proper permissions set, in that scenario your apache/nginx logs could fill up very quickly with “permission denied errors”

Full explanation is here http://blog.tonycode.com/archives/418