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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Web;
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namespace HuizhongLibrary
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{
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public class LocalIpAddress
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{
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public static string GetIPAddress
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{
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get
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{
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string result = String.Empty;
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result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; if (result != null && result != String.Empty)
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{
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//可能有代理
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if (result.IndexOf(".") == -1) //没有“.”肯定是非IPv4格式
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result = null;
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else
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{
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if (result.IndexOf(",") != -1)
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{
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//有“,”，估计多个代理。取第一个不是内网的IP。
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result = result.Replace(" ", "").Replace("'", "");
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string[] temparyip = result.Split(",;".ToCharArray());
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for (int i = 0; i < temparyip.Length; i++)
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{
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if (IsIPAddress(temparyip[i]) && temparyip[i].Substring(0, 3) != "10." && temparyip[i].Substring(0, 7) != "192.168" && temparyip[i].Substring(0, 7) != "172.16.")
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{
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return temparyip[i]; //找到不是内网的地址
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}
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}
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}
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else if (IsIPAddress(result)) //代理即是IP格式
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return result;
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else
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result = null; //代理中的内容 非IP，取IP
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}
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}
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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["REMOTE_ADDR"];
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if (null == result || result == String.Empty)
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result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
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if (result == null || result == String.Empty)
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result = HttpContext.Current.Request.UserHostAddress;
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return result;
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}
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}
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#region bool IsIPAddress(str1) 判断是否是IP格式
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/**//// <summary>
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/// 判断是否是IP地址格式 0.0.0.0
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/// </summary>
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/// <param name="str1">待判断的IP地址</param>
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/// <returns>true or false</returns>
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public static bool IsIPAddress(string str1)
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{
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if (str1 == null || str1 == string.Empty || str1.Length < 7 || str1.Length > 15) return false;
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string regformat = @"^\d{1,3}[\.]\d{1,3}[\.]\d{1,3}[\.]\d{1,3}$";
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Regex regex = new Regex(regformat, RegexOptions.IgnoreCase);
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return regex.IsMatch(str1);
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}
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#endregion
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}
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}
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