1 public void GetTaobaoItemUrl() {
 2     string url = "http://s.click.taobao.com/t?e=zGU34CA7K%2BPkqB07S4%2FK0CITy7klxn%2Fr3HZwuuY0VC7BwYkZv73a3PW1o5SlwMRiGrcwbOzwa3N3JoOfoVfSM2RlTfwcGDtjuwKnx8nBa%2FaGrfk94bBOek1t8uBhMOkj8M0KzYhxTDClgTNrzeglhB0kL3Mi2xiQcNpLhBuB6Ueo19xG2FeJp%2BZN9VlQYnF6ZDMmTWGU&unid=1S14021878&spm=2014.12019391.1.0";
 3     HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
 4     request.AllowAutoRedirect = false;
 5     HttpWebResponse response = request.GetResponse() as HttpWebResponse;
 6     url = response.Headers["Location"];
 7     response.Close();
 8     Uri uri = new Uri(url);
 9     url = HttpUtility.UrlDecode(uri.Query.Substring(4));
10     request = WebRequest.Create(url) as HttpWebRequest;
11     request.AllowAutoRedirect = false;
12     request.Referer = uri.ToString();
13     response = request.GetResponse() as HttpWebResponse;
14     url = response.Headers["Location"];
15     response.Close();
16     Console.WriteLine(url);
17 }