获取客户端IPAsp.Net

1 #region 获取客户端IP地址
2
3         /// <summary>
4         /// 获取客户端IP地址
5         /// </summary>
6         /// <returns></returns>
7         public static string GetIP()
8         {
9             string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
10             if (string.IsNullOrEmpty(result))
11             {
12                 result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
13             }
14             if (string.IsNullOrEmpty(result))
15             {
16                 result = HttpContext.Current.Request.UserHostAddress;
17             }
18             if (string.IsNullOrEmpty(result))
19             {
20                 return "0.0.0.0";
21             }
22             return result;
23         }
24
25         #endregion
26
27         #region 取客户端真实IP
28
29         ///  <summary>
30         ///  取得客户端真实IP。如果有代理则取第一个非内网地址
31         ///  </summary>
32         public static string GetIPAddress
33         {
34             get
35             {
36                 var result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
37                 if (!string.IsNullOrEmpty(result))
38                 {
39                     //可能有代理
40                     if (result.IndexOf(".") == -1)        //没有“.”肯定是非IPv4格式
41                         result = null;
42                     else
43                     {
44                         if (result.IndexOf(",") != -1)
45                         {
46                             //有“,”，估计多个代理。取第一个不是内网的IP。
47                             result = result.Replace("  ", "").Replace("'", "");
48                             string[] temparyip = result.Split(",;".ToCharArray());
49                             for (int i = 0; i < temparyip.Length; i++)
50                             {
51                                 if (IsIPAddress(temparyip[i])
52                                         && temparyip[i].Substring(0, 3) != "10."
53                                         && temparyip[i].Substring(0, 7) != "192.168"
54                                         && temparyip[i].Substring(0, 7) != "172.16.")
55                                 {
56                                     return temparyip[i];        //找到不是内网的地址
57                                 }
58                             }
59                         }
60                         else if (IsIPAddress(result))  //代理即是IP格式
61                             return result;
62                         else
63                             result = null;        //代理中的内容  非IP，取IP
64                     }
65
66                 }
67
68                 string IpAddress = (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null && HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != String.Empty) ? HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] : HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"];
69
70                 if (string.IsNullOrEmpty(result))
71                     result = HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"];
72
73                 if (string.IsNullOrEmpty(result))
74                     result = HttpContext.Current.Request.UserHostAddress;
75
76                 return result;
77             }
78         }
79
80         #endregion
81
82         #region  判断是否是IP格式
83
84         ///  <summary>
85         ///  判断是否是IP地址格式  0.0.0.0
86         ///  </summary>
87         ///  <param  name="str1">待判断的IP地址</param>
88         ///  <returns>true  or  false</returns>
89         public static bool IsIPAddress(string str1)
90         {
91             if (string.IsNullOrEmpty(str1) || str1.Length < 7 || str1.Length > 15) return false;
92
93             const string regFormat = @"^d{1,3}[.]d{1,3}[.]d{1,3}[.]d{1,3}$";
94
95             var regex = new Regex(regFormat, RegexOptions.IgnoreCase);
96             return regex.IsMatch(str1);
97         }
98
99         #endregion
100
101         #region 获取公网IP
102         /// <summary>
103         /// 获取公网IP
104         /// </summary>
105         /// <returns></returns>
106         public static string GetNetIP()
107         {
108             string tempIP = "";
109             try
110             {
111                 System.Net.WebRequest wr = System.Net.WebRequest.Create("http://city.ip138.com/ip2city.asp");
112                 System.IO.Stream s = wr.GetResponse().GetResponseStream();
113                 System.IO.StreamReader sr = new System.IO.StreamReader(s, System.Text.Encoding.GetEncoding("gb2312"));
114                 string all = sr.ReadToEnd(); //读取网站的数据
115
116                 int start = all.IndexOf("[") + 1;
117                 int end = all.IndexOf("]", start);
118                 tempIP = all.Substring(start, end - start);
119                 sr.Close();
120                 s.Close();
121             }
122             catch
123             {
124                 if (System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList.Length > 1)
125                     tempIP = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList[1].ToString();
126                 if (string.IsNullOrEmpty(tempIP))
127                     return GetIP();
128             }
129             return tempIP;
130         }
131         #endregion