Accept header mime parser can now deal with empty fields

actionpack/lib/action_controller/mime_type.rb

@@ -71,8 +71,11 @@ def parse(accept_header)
         # keep track of creation order to keep the subsequent sort stable
         list = []
         accept_header.split(/,/).each_with_index do |header, index| 
-          params = header.split(/;\s*q=/)
-          list << AcceptItem.new(index, *params) unless params.empty?
+          params, q = header.split(/;\s*q=/)       
+          if params
+            params.strip!          
+            list << AcceptItem.new(index, params, q) unless params.empty?
+          end
         end
         list.sort!
 
@@ -145,7 +148,7 @@ def ===(list)
     end
     
     def ==(mime_type)
-      return false unless mime_type
+      return false if mime_type.blank?
       (@synonyms + [ self ]).any? do |synonym| 
         synonym.to_s == mime_type.to_s || synonym.to_sym == mime_type.to_sym 
       end

actionpack/test/controller/mime_type_test.rb

@@ -28,6 +28,13 @@ def test_parse_crappy_broken_acceptlines
     expect = [Mime::HTML, Mime::XML, "image/*", Mime::TEXT, Mime::ALL]
     assert_equal expect, Mime::Type.parse(accept).collect { |c| c.to_s }
   end
+
+  # Accept header send with user HTTP_USER_AGENT: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; InfoPath.1)
+  def test_parse_crappy_broken_acceptlines2
+    accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword,  , pronto/1.00.00, sslvpn/1.00.00.00, */*"
+    expect = ['image/gif', 'image/x-xbitmap', 'image/jpeg','image/pjpeg', 'application/x-shockwave-flash', 'application/vnd.ms-excel', 'application/vnd.ms-powerpoint', 'application/msword', 'pronto/1.00.00', 'sslvpn/1.00.00.00', Mime::ALL  ]
+    assert_equal expect, Mime::Type.parse(accept).collect { |c| c.to_s }
+  end
   
   def test_custom_type
     Mime::Type.register("image/gif", :gif)