Methods
C
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Instance Public methods
cache_page(content, path, extension = nil, gzip = Zlib::BEST_COMPRESSION)

Manually cache the content in the key determined by path. Example: 

  cache_page "I'm the cached content", "/lists/show"

Source: show | on GitHub 

    # File actionpack/lib/action_controller/caching/pages.rb, line 77
77:         def cache_page(content, path, extension = nil, gzip = Zlib::BEST_COMPRESSION)
78:           return unless perform_caching
79:           path = page_cache_path(path, extension)
80: 
81:           instrument_page_cache :write_page, path do
82:             FileUtils.makedirs(File.dirname(path))
83:             File.open(path, "wb+") { |f| f.write(content) }
84:             if gzip
85:               Zlib::GzipWriter.open(path + '.gz', gzip) { |f| f.write(content) }
86:             end
87:           end
88:         end
caches_page(*actions)

Caches the actions using the page-caching approach that’ll store the cache in a path within the page_cache_directory that matches the triggering url.

You can also pass a :gzip option to override the class configuration one.

Usage: 

  # cache the index action
  caches_page :index

  # cache the index action except for JSON requests
  caches_page :index, :if => Proc.new { |c| !c.request.format.json? }

  # don't gzip images
  caches_page :image, :gzip => false

Source: show | on GitHub 

     # File actionpack/lib/action_controller/caching/pages.rb, line 106
106:         def caches_page(*actions)
107:           return unless perform_caching
108:           options = actions.extract_options!
109: 
110:           gzip_level = options.fetch(:gzip, page_cache_compression)
111:           gzip_level = case gzip_level
112:           when Symbol
113:             Zlib.const_get(gzip_level.to_s.upcase)
114:           when Fixnum
115:             gzip_level
116:           when false
117:             nil
118:           else
119:             Zlib::BEST_COMPRESSION
120:           end
121: 
122:           after_filter({:only => actions}.merge(options)) do |c|
123:             c.cache_page(nil, nil, gzip_level)
124:           end
125:         end
expire_page(path)

Expires the page that was cached with the path as a key. Example: 

  expire_page "/lists/show"

Source: show | on GitHub 

    # File actionpack/lib/action_controller/caching/pages.rb, line 65
65:         def expire_page(path)
66:           return unless perform_caching
67:           path = page_cache_path(path)
68: 
69:           instrument_page_cache :expire_page, path do
70:             File.delete(path) if File.exist?(path)
71:             File.delete(path + '.gz') if File.exist?(path + '.gz')
72:           end
73:         end