Added that respond_to blocks will automatically set the content type to be the same as is requested [DHH]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@5131 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

@@ -1,5 +1,13 @@
 *SVN*
 
+* Added that respond_to blocks will automatically set the content type to be the same as is requested [DHH]. Examples:
+
+    respond_to do |format|
+      format.html { render :text => "I'm being sent as text/html" }
+      format.rss  { render :text => "I'm being sent as application/rss+xml" }
+      format.atom { render :text => "I'm being sent as application/xml", :content_type => Mime::XML }
+    end
+
 * Added utf-8 as the default charset for all renders. You can change this default using ActionController::Base.default_charset=(encoding) [DHH]
 
 * Added proper getters and setters for content type and charset [DHH]. Example of what we used to do:

actionpack/lib/action_controller/mime_responds.rb

@@ -108,7 +108,7 @@ module ActionController #:nodoc:
     
     class Responder #:nodoc:
       DEFAULT_BLOCKS = [:html, :js, :xml].inject({}) do |blocks, ext|
-        blocks.update ext => %(Proc.new { render :action => "\#{action_name}.r#{ext}" })
+        blocks.update ext => %(Proc.new { render :action => "\#{action_name}.r#{ext}", :content_type => Mime::#{ext.to_s.upcase} })
       end      
       
       def initialize(block_binding)
@@ -129,7 +129,10 @@ module ActionController #:nodoc:
         @order << mime_type
         
         if block_given?
-          @responses[mime_type] = block
+          @responses[mime_type] = Proc.new do
+            eval "response.content_type = Mime::#{mime_type.to_sym.to_s.upcase}", @block_binding
+            block.call
+          end
         else
           if source = DEFAULT_BLOCKS[mime_type.to_sym]
             @responses[mime_type] = eval(source, @block_binding)            

actionpack/test/controller/content_type_test.rb

@@ -30,6 +30,15 @@ class ContentTypeController < ActionController::Base
     render :action => "render_default_for_rxml"
   end
 
+  def render_default_content_types_for_respond_to
+    respond_to do |format|
+      format.html { render :text   => "hello world!" }
+      format.xml  { render :action => "render_default_content_types_for_respond_to.rhtml" }
+      format.js   { render :text   => "hello world!" }
+      format.rss  { render :text   => "hello world!", :content_type => Mime::XML }
+    end
+  end
+
   def rescue_action(e) raise end
 end
 
@@ -96,4 +105,26 @@ class ContentTypeTest < Test::Unit::TestCase
     assert_equal Mime::HTML, @response.content_type
     assert_equal "utf-8", @response.charset    
   end
+  
+  def test_render_default_content_types_for_respond_to
+    @request.env["HTTP_ACCEPT"] = Mime::HTML.to_s
+    get :render_default_content_types_for_respond_to
+    assert_equal Mime::HTML, @response.content_type
+
+    @request.env["HTTP_ACCEPT"] = Mime::JS.to_s
+    get :render_default_content_types_for_respond_to
+    assert_equal Mime::JS, @response.content_type
+  end
+
+  def test_render_default_content_types_for_respond_to_with_template
+    @request.env["HTTP_ACCEPT"] = Mime::XML.to_s
+    get :render_default_content_types_for_respond_to
+    assert_equal Mime::XML, @response.content_type
+  end
+  
+  def test_render_default_content_types_for_respond_to_with_overwrite
+    @request.env["HTTP_ACCEPT"] = Mime::RSS.to_s
+    get :render_default_content_types_for_respond_to
+    assert_equal Mime::XML, @response.content_type
+  end
 end

actionpack/test/fixtures/content_type/render_default_content_types_for_respond_to.rhtml

@@ -0,0 +1 @@
+<hello>world</hello>