1 files changed, 80 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..c2e999ef6c
--- /dev/null
+++ b/activesupport/lib/active_support/xml_mini/libxml.rb
@@ -0,0 +1,80 @@
+# frozen_string_literal: true
+
+require "libxml"
+require "active_support/core_ext/object/blank"
+require "stringio"
+
+module ActiveSupport
+  module XmlMini_LibXML #:nodoc:
+    extend self
+
+    # Parse an XML Document string or IO into a simple hash using libxml.
+    # data::
+    #   XML Document string or IO to parse
+    def parse(data)
+      if !data.respond_to?(:read)
+        data = StringIO.new(data || "")
+      end
+
+      if data.eof?
+        {}
+      else
+        LibXML::XML::Parser.io(data).parse.to_hash
+      end
+    end
+  end
+end
+
+module LibXML #:nodoc:
+  module Conversions #:nodoc:
+    module Document #:nodoc:
+      def to_hash
+        root.to_hash
+      end
+    end
+
+    module Node #:nodoc:
+      CONTENT_ROOT = "__content__"
+
+      # Convert XML document to hash.
+      #
+      # hash::
+      #   Hash to merge the converted element into.
+      def to_hash(hash = {})
+        node_hash = {}
+
+        # Insert node hash into parent hash correctly.
+        case hash[name]
+        when Array then hash[name] << node_hash
+        when Hash  then hash[name] = [hash[name], node_hash]
+        when nil   then hash[name] = node_hash
+        end
+
+        # Handle child elements
+        each_child do |c|
+          if c.element?
+            c.to_hash(node_hash)
+          elsif c.text? || c.cdata?
+            node_hash[CONTENT_ROOT] ||= +""
+            node_hash[CONTENT_ROOT] << c.content
+          end
+        end
+
+        # Remove content node if it is blank
+        if node_hash.length > 1 && node_hash[CONTENT_ROOT].blank?
+          node_hash.delete(CONTENT_ROOT)
+        end
+
+        # Handle attributes
+        each_attr { |a| node_hash[a.name] = a.value }
+
+        hash
+      end
+    end
+  end
+end
+
+# :enddoc:
+
+LibXML::XML::Document.include(LibXML::Conversions::Document)
+LibXML::XML::Node.include(LibXML::Conversions::Node)