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Diffstat (limited to 'actionpack/lib/action_controller/caching/actions.rb')
| -rw-r--r-- | actionpack/lib/action_controller/caching/actions.rb | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/actionpack/lib/action_controller/caching/actions.rb b/actionpack/lib/action_controller/caching/actions.rb deleted file mode 100644 index bf16fe267c..0000000000 --- a/actionpack/lib/action_controller/caching/actions.rb +++ /dev/null @@ -1,189 +0,0 @@ -require 'set' - -module ActionController - module Caching - # Action caching is similar to page caching by the fact that the entire - # output of the response is cached, but unlike page caching, every - # request still goes through Action Pack. The key benefit of this is - # that filters run before the cache is served, which allows for - # authentication and other restrictions on whether someone is allowed - # to execute such action. - # - # class ListsController < ApplicationController - # before_filter :authenticate, except: :public - # - # caches_page :public - # caches_action :index, :show - # end - # - # In this example, the +public+ action doesn't require authentication - # so it's possible to use the faster page caching. On the other hand - # +index+ and +show+ require authentication. They can still be cached, - # but we need action caching for them. - # - # Action caching uses fragment caching internally and an around - # filter to do the job. The fragment cache is named according to - # the host and path of the request. A page that is accessed at - # <tt>http://david.example.com/lists/show/1</tt> will result in a fragment named - # <tt>david.example.com/lists/show/1</tt>. This allows the cacher to - # differentiate between <tt>david.example.com/lists/</tt> and - # <tt>jamis.example.com/lists/</tt> -- which is a helpful way of assisting - # the subdomain-as-account-key pattern. - # - # Different representations of the same resource, e.g. - # <tt>http://david.example.com/lists</tt> and - # <tt>http://david.example.com/lists.xml</tt> - # are treated like separate requests and so are cached separately. - # Keep in mind when expiring an action cache that - # <tt>action: 'lists'</tt> is not the same as - # <tt>action: 'list', format: :xml</tt>. - # - # You can modify the default action cache path by passing a - # <tt>:cache_path</tt> option. This will be passed directly to - # <tt>ActionCachePath.new</tt>. This is handy for actions with - # multiple possible routes that should be cached differently. If a - # block is given, it is called with the current controller instance. - # - # And you can also use <tt>:if</tt> (or <tt>:unless</tt>) to pass a - # proc that specifies when the action should be cached. - # - # As of Rails 3.0, you can also pass <tt>:expires_in</tt> with a time - # interval (in seconds) to schedule expiration of the cached item. - # - # The following example depicts some of the points made above: - # - # class ListsController < ApplicationController - # before_filter :authenticate, except: :public - # - # caches_page :public - # - # caches_action :index, if: Proc.new do - # !request.format.json? # cache if is not a JSON request - # end - # - # caches_action :show, cache_path: { project: 1 }, - # expires_in: 1.hour - # - # caches_action :feed, cache_path: Proc.new do - # if params[:user_id] - # user_list_url(params[:user_id, params[:id]) - # else - # list_url(params[:id]) - # end - # end - # end - # - # If you pass <tt>layout: false</tt>, it will only cache your action - # content. That's useful when your layout has dynamic information. - # - # Warning: If the format of the request is determined by the Accept HTTP - # header the Content-Type of the cached response could be wrong because - # no information about the MIME type is stored in the cache key. So, if - # you first ask for MIME type M in the Accept header, a cache entry is - # created, and then perform a second request to the same resource asking - # for a different MIME type, you'd get the content cached for M. - # - # The <tt>:format</tt> parameter is taken into account though. The safest - # way to cache by MIME type is to pass the format in the route. - module Actions - extend ActiveSupport::Concern - - module ClassMethods - # Declares that +actions+ should be cached. - # See ActionController::Caching::Actions for details. - def caches_action(*actions) - return unless cache_configured? - options = actions.extract_options! - options[:layout] = true unless options.key?(:layout) - filter_options = options.extract!(:if, :unless).merge(:only => actions) - cache_options = options.extract!(:layout, :cache_path).merge(:store_options => options) - - around_filter ActionCacheFilter.new(cache_options), filter_options - end - end - - def _save_fragment(name, options) - content = "" - response_body.each do |parts| - content << parts - end - - if caching_allowed? - write_fragment(name, content, options) - else - content - end - end - - protected - def expire_action(options = {}) - return unless cache_configured? - - if options.is_a?(Hash) && options[:action].is_a?(Array) - options[:action].each {|action| expire_action(options.merge(:action => action)) } - else - expire_fragment(ActionCachePath.new(self, options, false).path) - end - end - - class ActionCacheFilter #:nodoc: - def initialize(options, &block) - @cache_path, @store_options, @cache_layout = - options.values_at(:cache_path, :store_options, :layout) - end - - def around(controller) - cache_layout = @cache_layout.respond_to?(:call) ? @cache_layout.call(controller) : @cache_layout - - path_options = if @cache_path.respond_to?(:call) - controller.instance_exec(controller, &@cache_path) - else - @cache_path - end - - cache_path = ActionCachePath.new(controller, path_options || {}) - - body = controller.read_fragment(cache_path.path, @store_options) - - unless body - controller.action_has_layout = false unless cache_layout - yield - controller.action_has_layout = true - body = controller._save_fragment(cache_path.path, @store_options) - end - - body = controller.render_to_string(:text => body, :layout => true) unless cache_layout - - controller.response_body = body - controller.content_type = Mime[cache_path.extension || :html] - end - end - - class ActionCachePath - attr_reader :path, :extension - - # If +infer_extension+ is +true+, the cache path extension is looked up from the request's - # path and format. This is desirable when reading and writing the cache, but not when - # expiring the cache - +expire_action+ should expire the same files regardless of the - # request format. - def initialize(controller, options = {}, infer_extension = true) - if infer_extension - @extension = controller.params[:format] - options.reverse_merge!(:format => @extension) if options.is_a?(Hash) - end - - path = controller.url_for(options).split('://', 2).last - @path = normalize!(path) - end - - private - def normalize!(path) - ext = URI.parser.escape(extension) if extension - path << 'index' if path[-1] == ?/ - path << ".#{ext}" if extension and !path.split('?', 2).first.ends_with?(".#{ext}") - URI.parser.unescape(path) - end - end - end - end -end |