Ruby：如何使用Nokogiri从XML获取属性值？

Question

如何获取消息值的值（“准备使用”）？

<?xml version="1.0" encoding="UTF-8"?>
<response status="ok" permission_level="admin" message="ready to use" cached="0">
<title>kit</title>
</response>

由于

Answer 1

require 'rubygems'
require 'nokogiri'

string = %Q{
  <?xml version="1.0" encoding="UTF-8"?>
  <response status="ok" permission_level="admin" message="ready to use" cached="0">
  <title>kit</title>
  </response>
}

doc = Nokogiri::XML(string)
doc.css("response").each do |response_node|
  puts response_node["message"]
end

保存并运行这个ruby文件，你会得到结果：

#=> ready to use

Answer 2

你下标他们。

doc = Nokogiri::HTML(open('http://google.com'))
doc.css('img:first').first['alt']
=> "Google"