Search node in xml by using Nokogiri xpath (with xml namesapce) - ruby

Question

I found Nokogiri is quite powerful on dealing with xml but I met a special case
I am trying to search a node in xml file like this
<?xml version="1.0" encoding="utf-8" ?>
<ConfigurationSection>
<Configuration xmlns="clr-namespace:Newproject.Framework.Server.Store.Configuration;assembly=Newproject.Framework.Server" >
<Configuration.Store>SqlServer</Configuration.Store>
<Configuration.Engine>Staging</Configuration.Engine>
</Configuration>
</ConfigurationSection>
When I do a
xml = File.new(webconfig,"r")
doc = Nokogiri::XML(xml.read)
nodes = doc.search("//Configuration.Store")
xml.close
I got empty nodes. Something am I missing? I have tried
nodes = doc.search("//Configuration\.Store")
still no luck.
Updated: I have attached the whole xml file
Updated the xml Again: My mistake, it does have a namaspace

Answer 1

EDIT #2: Solution now includes #parse_with_namespace
You can find a number of Nokogiri methods pertaining to namespaces in the Nokogiri::XML::Node documentation.
# encoding: UTF-8
require 'rspec'
require 'nokogiri'
XML = <<XML
<?xml version="1.0" encoding="utf-8" ?>
<ConfigurationSection>
<Configuration xmlns="clr-namespace:Newproject.Framework.Server.Store.Configuration;assembly=Newproject.Framework.Server" >
<Configuration.Store>SqlServer</Configuration.Store>
<Configuration.Engine>Staging</Configuration.Engine>
</Configuration>
</ConfigurationSection>
XML
class ConfigParser
def parse(xml)
doc = Nokogiri::XML(xml).remove_namespaces!
configuration = doc.at('/ConfigurationSection/Configuration')
store = configuration.at("./Configuration.Store").text
engine = configuration.at("./Configuration.Engine").text
{store: store, engine: engine}
end
def parse_with_namespace(xml)
doc = Nokogiri::XML(xml)
configuration = doc.at('/ConfigurationSection/xmlns:Configuration', 'xmlns' => 'clr-namespace:Newproject.Framework.Server.Store.Configuration;assembly=Newproject.Framework.Server')
store = configuration.at("./xmlns:Configuration.Store", 'xmlns' => 'clr-namespace:Newproject.Framework.Server.Store.Configuration;assembly=Newproject.Framework.Server').text
engine = configuration.at("./xmlns:Configuration.Engine", 'xmlns' => 'clr-namespace:Newproject.Framework.Server.Store.Configuration;assembly=Newproject.Framework.Server').text
{store: store, engine: engine}
end
end
describe ConfigParser do
before(:each) do
#parsed = subject.parse XML
#parsed_with_ns = subject.parse_with_namespace XML
end
it "should be able to parse the Configuration Store" do
#parsed[:store].should eq "SqlServer"
end
it "should be able to parse the Configuration Engine" do
#parsed[:engine].should eq "Staging"
end
it "should be able to parse the Configuration Store with namespace" do
#parsed_with_ns[:store].should eq "SqlServer"
end
it "should be able to parse the Configuration Engine with namespace" do
#parsed_with_ns[:engine].should eq "Staging"
end
end

Answer 2

require 'nokogiri'
XML = "<Configuration>
<Configuration.Store>SqlServer</Configuration.Store>
<Configuration.Engine>Staging</Configuration.Engine>
</Configuration>"
p Nokogiri::VERSION, Nokogiri.XML(XML).search('//Configuration.Store')
#=> "1.5.0"
#=> [#<Nokogiri::XML::Element:0x8103f0f8 name="Configuration.Store" children=[#<Nokogiri::XML::Text:0x81037524 "SqlServer">]>]
p RUBY_DESCRIPTION
#=> "ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-darwin10.7.0]"