Support hexBinary format in XML

Author: heka1024

activesupport/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Support `hexBinary` type in `ActiveSupport::XmlMini`.
+
+    *heka1024*
+
 *   Deprecate `ActiveSupport::ProxyObject` in favor of Ruby's buildin `BasicObject`
 
     *Earlopain*

activesupport/lib/active_support/xml_mini.rb

@@ -79,6 +79,7 @@ def content_type
         "string"       => Proc.new { |string|  string.to_s },
         "yaml"         => Proc.new { |yaml|    YAML.load(yaml) rescue yaml },
         "base64Binary" => Proc.new { |bin|     ::Base64.decode64(bin) },
+        "hexBinary"    => Proc.new { |bin|     parse_hex_binary(bin) },
         "binary"       => Proc.new { |bin, entity| _parse_binary(bin, entity) },
         "file"         => Proc.new { |file, entity| _parse_file(file, entity) }
       }
@@ -162,11 +163,12 @@ def _dasherize(key)
         "#{left}#{middle.tr('_ ', '--')}#{right}"
       end
 
-      # TODO: Add support for other encodings
       def _parse_binary(bin, entity)
         case entity["encoding"]
         when "base64"
           ::Base64.decode64(bin)
+        when "hex", "hexBinary"
+          parse_hex_binary(bin)
         else
           bin
         end
@@ -180,6 +182,10 @@ def _parse_file(file, entity)
         f
       end
 
+      def parse_hex_binary(bin)
+        [bin].pack("H*")
+      end
+
       def current_thread_backend
         IsolatedExecutionState[:xml_mini_backend]
       end

activesupport/test/xml_mini_test.rb

@@ -337,6 +337,19 @@ def test_yaml
       assert_equal({ "1 => 'test'" => nil }, parser.call("{1 => 'test'}"))
     end
 
+    def test_hexBinary
+      parser = @parsing["hexBinary"]
+
+      expected = "Hello, World!"
+      hex_binary = "48656C6C6F2C20576F726C6421"
+
+      assert_equal expected, parser.call(hex_binary)
+
+      parser = @parsing["binary"]
+      assert_equal expected, parser.call(hex_binary, "encoding" => "hexBinary")
+      assert_equal expected, parser.call(hex_binary, "encoding" => "hex")
+    end
+
     def test_base64Binary_and_binary
       base64 = <<BASE64
 TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlz