1 /// <summary>
2 /// 获取客户端IP地址（无视代理）
3 /// </summary>
4 /// <returns>若失败则返回回送地址</returns>
5 public static string GetHostAddress()
6 {
7 string userHostAddress = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
8 if (string.IsNullOrEmpty(userHostAddress))
9 {
10 if (System.Web.HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null)
11 userHostAddress = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString().Split(',')[0].Trim();
12 }
13 if (string.IsNullOrEmpty(userHostAddress))
14 {
15 userHostAddress = HttpContext.Current.Request.UserHostAddress;
16 }
17
18 //最后判断获取是否成功，并检查IP地址的格式（检查其格式非常重要）
19 if (!string.IsNullOrEmpty(userHostAddress) && IsIP(userHostAddress))
20 {
21 return userHostAddress;
22 }
23 return "127.0.0.1";
24 }
25
26 /// <summary>
27 /// 检查IP地址格式
28 /// </summary>
29 /// <param name="ip"></param>
30 /// <returns></returns>
31 public static bool IsIP(string ip)
32 {
33 return System.Text.RegularExpressions.Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");
34 }
35
