method

expires_in

v3.0.7 - Show latest stable - 1 note - Class: ActionController::ConditionalGet

1.0.0
1.1.0
1.1.1
1.1.6
1.2.0
1.2.6
2.0.0
2.0.1
2.0.3
2.1.0
2.2.1
2.3.2
2.3.8
3.0.0 (0)
3.0.5 (0)
3.0.7 (0)
3.0.9 (-38)
3.1.0 (12)
3.2.1 (0)
3.2.3 (0)
3.2.8 (0)
3.2.13 (0)
What's this?

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.

Show source

# File actionpack/lib/action_controller/metal/conditional_get.rb, line 73
    def expires_in(seconds, options = {}) #:doc:
      response.cache_control.merge!(:max_age => seconds, :public => options.delete(:public))
      options.delete(:private)

      response.cache_control[:extras] = options.map {|k,v| "#{k}=#{v}"}
    end

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

0 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

expires_in

Related methods

be aware that this writes to tmp/cache

Flowdock - Team Inbox With Chat