Ruby：我如何使用Nokogiri從XML獲取屬性值？

Question

如何獲取消息值的值（「準備使用」）？

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

感謝

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 

保存並運行此ruby文件，你會得到結果：

#=> ready to use 

Answer 2

你下標它們。

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