在云中，可以加入HTTP来提高抓取成功概率，以华科HTTP为例：

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("​​http://ip.hahado.cn/ip​​​");

WebProxy myProxy = new WebProxy();

Uri newUri = new Uri("​​http://ip.hahado.cn:39010​​​");

myProxy.Address = newUri;

myProxy.Credentials = new NetworkCredential("username", "password");


request.Proxy = myProxy;