date: //span[@class='date']
body: //div[@class='post_content']
test_url: http://www.shabayek.com/blog/2011/10/16/%D8%AF%D8%B1%D9%88%D8%B3-%D9%85%D9%86-%D9%82%D8%B5%D8%A9-%D8%AA%D8%A3%D8%B3%D9%8A%D8%B3-%D8%AA%D9%88%D9%8A%D8%AA%D8%B1-%E2%80%93%D8%AC3/