implement code that handles text/*, appplication/*,

and image/*

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

actionpack/lib/action_dispatch/http/mime_type.rb

@@ -103,9 +103,14 @@ def register(string, symbol, mime_type_synonyms = [], extension_synonyms = [], s
         ([symbol.to_s] + extension_synonyms).each { |ext| EXTENSION_LOOKUP[ext] = SET.last }
       end
 
+
       def parse(accept_header)
         if accept_header !~ /,/
-          [Mime::Type.lookup(accept_header)]
+          if result = Regexp.new('(\w+)\/\*').match(accept_header)
+            parse_data_with_trailing_star(result[1])
+          else
+            [Mime::Type.lookup(accept_header)]
+          end
         else
           # keep track of creation order to keep the subsequent sort stable
           list = []
@@ -160,6 +165,16 @@ def parse(accept_header)
           list
         end
       end
+
+      # input: 'text'
+      # returend value:  [Mime::JSON, Mime::XML, Mime::ICS, Mime::HTML, Mime::CSS, Mime::CSV, Mime::JS, Mime::YAML, Mime::TEXT]
+      #
+      # input: 'application'
+      # returend value: [Mime::HTML, Mime::JS, Mime::XML, Mime::YAML, Mime::ATOM, Mime::JSON, Mime::RSS, Mime::URL_ENCODED_FORM
+      def parse_data_with_trailing_star(input)
+        keys = Mime::LOOKUP.keys.select{|k| Regexp.new(input).match(k)}
+        Mime::LOOKUP.select {|k,_| keys.include?(k)}.collect{|i| i[1]}.inject([]){|all,e| all.include?(e) ? all : all << e}
+      end
     end
 
     def initialize(string, symbol = nil, synonyms = [])