1 files changed, 8 insertions, 2 deletions
diff --git a/actionpack/lib/action_dispatch/http/mime_type.rb b/actionpack/lib/action_dispatch/http/mime_type.rb
index ed1d50f3b9..60b78c0582 100644
--- a/actionpack/lib/action_dispatch/http/mime_type.rb
+++ b/actionpack/lib/action_dispatch/http/mime_type.rb
@@ -202,7 +202,7 @@ module Mime
       # For an input of <tt>'application'</tt>, returns <tt>[Mime[:html], Mime[:js],
       # Mime[:xml], Mime[:yaml], Mime[:atom], Mime[:json], Mime[:rss], Mime[:url_encoded_form]</tt>.
       def parse_data_with_trailing_star(type)
-        Mime::SET.select { |m| m =~ type }
+        Mime::SET.select { |m| m.match?(type) }
       end
 
       # This method is opposite of register method.
@@ -283,8 +283,14 @@ module Mime
       @synonyms.any? { |synonym| synonym.to_s =~ regexp } || @string =~ regexp
     end
 
+    def match?(mime_type)
+      return false unless mime_type
+      regexp = Regexp.new(Regexp.quote(mime_type.to_s))
+      @synonyms.any? { |synonym| synonym.to_s.match?(regexp) } || @string.match?(regexp)
+    end
+
     def html?
-      symbol == :html || @string =~ /html/
+      (symbol == :html) || /html/.match?(@string)
     end
 
     def all?; false; end