1 files changed, 131 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/xml_mini/libxml.rb b/activesupport/lib/active_support/xml_mini/libxml.rb
new file mode 100644
index 0000000000..e1549d8c58
--- /dev/null
+++ b/activesupport/lib/active_support/xml_mini/libxml.rb
@@ -0,0 +1,131 @@
+# = XML Mini Libxml implementation
+module ActiveSupport
+  module XmlMini_LibXML #:nodoc:
+    extend self
+
+    # Parse an XML Document string into a simple hash using libxml.
+    # string::
+    #   XML Document string to parse
+    def parse(string)
+      XML.default_keep_blanks = false
+
+      if string.blank?
+        {}
+      else
+        XML::Parser.string(string.strip).parse.to_hash
+      end
+    end
+
+  end
+end
+
+module XML
+  module Conversions
+    module Document
+      def to_hash
+        root.to_hash
+      end
+    end
+
+    module Node
+      CONTENT_ROOT = '__content__'
+      LIB_XML_LIMIT = 30000000 # Hardcoded LibXML limit
+
+      # Convert XML document to hash
+      #
+      # hash::
+      #   Hash to merge the converted element into.
+      def to_hash(hash={})
+        if text?
+          raise RuntimeError if content.length >= LIB_XML_LIMIT
+          hash[CONTENT_ROOT] = content
+        else
+          sub_hash = insert_name_into_hash(hash, name)
+          attributes_to_hash(sub_hash)
+          if array?
+            children_array_to_hash(sub_hash)
+          elsif yaml?
+            children_yaml_to_hash(sub_hash)
+          else
+            children_to_hash(sub_hash)
+          end
+        end
+        hash
+      end
+
+      protected
+
+        # Insert name into hash
+        #
+        # hash::
+        #   Hash to merge the converted element into.
+        # name::
+        #   name to to merge into hash
+        def insert_name_into_hash(hash, name)
+          sub_hash = {}
+          if hash[name]
+            if !hash[name].kind_of? Array
+              hash[name] = [hash[name]]
+            end
+            hash[name] << sub_hash
+          else
+            hash[name] = sub_hash
+          end
+          sub_hash
+        end
+
+        # Insert children into hash
+        #
+        # hash::
+        #   Hash to merge the children into.
+        def children_to_hash(hash={})
+          each { |child| child.to_hash(hash) }
+          attributes_to_hash(hash)
+          hash
+        end
+
+        # Convert xml attributes to hash
+        #
+        # hash::
+        #   Hash to merge the attributes into
+        def attributes_to_hash(hash={})
+          each_attr { |attr| hash[attr.name] = attr.value }
+          hash
+        end
+
+        # Convert array into hash
+        #
+        # hash::
+        #   Hash to merge the array into
+        def children_array_to_hash(hash={})
+          hash[child.name] = map do |child|
+            returning({}) { |sub_hash| child.children_to_hash(sub_hash) }
+          end
+          hash
+        end
+
+        # Convert yaml into hash
+        #
+        # hash::
+        #   Hash to merge the yaml into
+        def children_yaml_to_hash(hash = {})
+          hash[CONTENT_ROOT] = content unless content.blank?
+          hash
+        end
+
+        # Check if child is of type array
+        def array?
+          child? && child.next? && child.name == child.next.name
+        end
+
+        # Check if child is of type yaml
+        def yaml?
+          attributes.collect{|x| x.value}.include?('yaml')
+        end
+
+    end
+  end
+end
+
+XML::Document.send(:include, XML::Conversions::Document)
+XML::Node.send(:include, XML::Conversions::Node)