Start the appengine-tools gem

lib/appengine-tools/xml-formatter.rb

+#!/usr/bin/ruby1.8 -w
+#
+# Copyright:: Copyright 2009 Google Inc.
+# Original Author:: Ryan Brown (mailto:ribrdb@google.com)
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+require 'rexml/formatters/pretty'
+
+module AppEngine
+  module Rack
+    class XmlFormatter < REXML::Formatters::Pretty
+      def initialize
+        @compact = true
+        super
+      end
+  
+      def write_text( node, output )
+        output << node.to_s()
+      end
+  
+      def self.format(xml)
+        @formatter ||= XmlFormatter.new
+        output = ''
+        @formatter.write(xml, output)
+        return output
+      end
+    end
+  end
+end