初始化

Face.Services/Tool/System/IPHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using System.Web;
+
+namespace Face.Services.Tool
+{
+    public class IPHelper
+    {
+        public static string GetIP()
+        {
+            if (HttpContext.Current == null)
+            {
+                throw new Exception("HttpContext.Current为null");
+            }
+
+            string ip = string.Empty;
+            if (!string.IsNullOrEmpty(HttpContext.Current.Request.ServerVariables["HTTP_VIA"]))
+                ip = Convert.ToString(HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]);
+            if (string.IsNullOrEmpty(ip))
+                ip = Convert.ToString(HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"]);
+            if (IPAddress.TryParse(ip, out var ips))
+            {
+                byte[] ipBytes = ips.GetAddressBytes();
+                if (ipBytes[0] == 10) return ip;
+                if (ipBytes[0] == 172 && ipBytes[1] >= 16 && ipBytes[1] <= 31) return ip;
+                if (ipBytes[0] == 192 && ipBytes[1] == 168) return ip;
+            }
+            return ip;
+        }
+
+        /// <summary>获取客户端的IP，可以取到代理后的IP
+        /// 
+        /// </summary>
+        /// <returns></returns>
+        public static string GetClientIp()
+        {
+            string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
+            if (!string.IsNullOrEmpty(result))
+            {
+                //可能有代理  
+                if (result.IndexOf(".", StringComparison.Ordinal) == -1)
+                    result = null;
+                else
+                {
+                    if (result.IndexOf(",", StringComparison.Ordinal) != -1)
+                    {
+                        //有“,”，估计多个代理。取第一个不是内网的IP。  
+                        result = result.Replace("  ", "").Replace("'", "");
+                        string[] temparyip = result.Split(",;".ToCharArray());
+                        foreach (string t in temparyip)
+                        {
+                            if (IsIpAddress(t)
+                                && t.Substring(0, 3) != "10."
+                                && t.Substring(0, 7) != "192.168"
+                                && t.Substring(0, 7) != "172.16.")
+                            {
+                                return t;        //找到不是内网的地址  
+                            }
+                        }
+                    }
+                    else if (IsIpAddress(result))  //代理即是IP格式  
+                        return result;
+                    else
+                        result = null;        //代理中的内容  非IP，取IP  
+                }
+            }
+            if (string.IsNullOrEmpty(result))
+                result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
+            if (string.IsNullOrEmpty(result))
+                result = HttpContext.Current.Request.UserHostAddress;
+            return result;
+        }
+
+        ///  <summary>判断是否是IP地址格式  0.0.0.0
+        ///  
+        ///  </summary>
+        ///  <param  name="str">待判断的IP地址</param>
+        ///  <returns>true  or  false</returns>
+        public static bool IsIpAddress(string str)
+        {
+            if (string.IsNullOrEmpty(str) || str.Length < 7 || str.Length > 15) return false;
+
+            const string regformat = @"^d{1,3}[.]d{1,3}[.]d{1,3}[.]d{1,3}$";
+
+            Regex regex = new Regex(regformat, RegexOptions.IgnoreCase);
+            return regex.IsMatch(str);
+        }
+    }
+}