Add Nokogiri XML parser

Gemfile

@@ -5,6 +5,7 @@ gemspec
 group :development do
   gem "bundler"
   gem "libxml-ruby", platforms: [:ruby, :jruby]
+  gem "nokogiri", platforms: [:ruby, :jruby]
   gem "rake"
   gem "test-unit"
 end

lib/xmlrpc.rb

@@ -59,9 +59,12 @@
 #   * libxml (LibXMLStreamParser)
 #     * Compiled
 #     * See https://rubygems.org/gems/libxml-ruby/
+#   * nokogiri (NokogiriStreamParser)
+#     * Compiled
+#     * See https://nokogiri.org
 #
 # * General
-#   * possible to choose between XMLParser module (Expat wrapper) and REXML (pure Ruby) parsers
+#   * possible to choose between REXML (pure Ruby) and LibXML/Nokogiri (compiled) parsers
 #   * Marshalling Ruby objects to Hashes and reconstruct them later from a Hash
 #   * SandStorm component architecture XMLRPC::Client interface
 #

lib/xmlrpc/config.rb

@@ -15,6 +15,7 @@ module Config
     #
     # * XMLParser::REXMLStreamParser
     # * XMLParser::LibXMLStreamParser
+    # * XMLParser::NokogiriStreamParser
     DEFAULT_PARSER = XMLParser::REXMLStreamParser
 
     # enable <code><nil/></code> tag

lib/xmlrpc/parser.rb

@@ -624,7 +624,51 @@ def parse(str)
       end
     end
 
-    Classes = [REXMLStreamParser, LibXMLStreamParser]
+    class NokogiriStreamParser < AbstractStreamParser
+      def initialize
+        require 'nokogiri'
+        @parser_class = NokogiriStreamListener
+      end
+
+      class NokogiriStreamListener
+        include StreamParserMixin
+
+        def self.handler
+          # We need to construct this on first use, since we cannot be sure Nokogiri is available
+          @handler ||= begin
+            Class.new(Nokogiri::XML::SAX::Document) do
+              def initialize(parent)
+                super()
+                @parent = parent
+              end
+
+              def start_element_namespace(name, attrs = [], prefix = nil, uri = nil, ns = [])
+                @parent.startElement(name, attrs)
+              end
+
+              def end_element_namespace(name, prefix = nil, uri = nil)
+                @parent.endElement(name)
+              end
+
+              def characters(string)
+                @parent.character(string)
+              end
+
+              def cdata_block(string)
+                @parent.character(string)
+              end
+            end
+          end
+        end
+
+        def parse(str)
+          parser = Nokogiri::XML::SAX::Parser.new(self.class.handler.new(self))
+          parser.parse(str)
+        end
+      end
+    end
+
+    Classes = [REXMLStreamParser, LibXMLStreamParser, NokogiriStreamParser]
 
     # yields an instance of each installed parser
     def self.each_installed_parser