Ensure that while caching a page rails takes into

account the resolved mime type for the request

[#6110 state:resolved]

Signed-off-by: José Valim <jose.valim@gmail.com>

actionpack/lib/action_controller/caching/pages.rb

@@ -70,9 +70,9 @@ def expire_page(path)
 
         # Manually cache the +content+ in the key determined by +path+. Example:
         #   cache_page "I'm the cached content", "/lists/show"
-        def cache_page(content, path)
+        def cache_page(content, path, extension = nil)
           return unless perform_caching
-          path = page_cache_path(path)
+          path = page_cache_path(path, extension)
 
           instrument_page_cache :write_page, path do
             FileUtils.makedirs(File.dirname(path))
@@ -97,14 +97,16 @@ def caches_page(*actions)
         end
 
         private
-          def page_cache_file(path)
+          def page_cache_file(path, extension)
             name = (path.empty? || path == "/") ? "/index" : URI.parser.unescape(path.chomp('/'))
-            name << page_cache_extension unless (name.split('/').last || name).include? '.'
+            unless (name.split('/').last || name).include? '.'
+              name << (extension || self.page_cache_extension)
+            end
             return name
           end
 
-          def page_cache_path(path)
-            page_cache_directory + page_cache_file(path)
+          def page_cache_path(path, extension = nil)
+            page_cache_directory + page_cache_file(path, extension)
           end
 
           def instrument_page_cache(name, path)
@@ -145,7 +147,11 @@ def cache_page(content = nil, options = nil)
             request.path
         end
 
-        self.class.cache_page(content || response.body, path)
+        if (type = Mime::LOOKUP[self.content_type]) && (type_symbol = type.symbol).present?
+          extension = ".#{type_symbol}"
+        end
+
+        self.class.cache_page(content || response.body, path, extension)
       end
 
     end

actionpack/test/controller/caching_test.rb

@@ -16,6 +16,7 @@ class CachingController < ActionController::Base
 class PageCachingTestController < CachingController
   caches_page :ok, :no_content, :if => Proc.new { |c| !c.request.format.json? }
   caches_page :found, :not_found
+  caches_page :about_me
 
 
   def ok
@@ -47,6 +48,14 @@ def expire_custom_path
   def trailing_slash
     render :text => "Sneak attack"
   end
+
+  def about_me
+    respond_to do |format|
+      format.html {render :text => 'I am html'}
+      format.xml {render :text => 'I am xml'}
+    end
+  end
+
 end
 
 class PageCachingTest < ActionController::TestCase
@@ -111,6 +120,13 @@ def test_should_cache_without_trailing_slash_on_url
     assert File.exist?("#{FILE_STORE_PATH}/page_caching_test/trailing_slash.html")
   end
 
+  def test_should_obey_http_accept_attribute
+    @request.env['HTTP_ACCEPT'] = 'text/xml'
+    get :about_me
+    assert File.exist?("#{FILE_STORE_PATH}/page_caching_test/about_me.xml")
+    assert_equal 'I am xml', @response.body
+  end
+
   def test_should_cache_with_trailing_slash_on_url
     @controller.class.cache_page 'cached content', '/page_caching_test/trailing_slash/'
     assert File.exist?("#{FILE_STORE_PATH}/page_caching_test/trailing_slash.html")