一种基于自定义代码的asp.net网站首页根据IP自动跳转指定页面的方法！

一种基于自定义代码的asp.net网站首页根据IP自动跳转指定页面的方法！

对于大中型网站，为了增强用户体验，往往需要根据不同城市站点的用户推送或展现相应个性化的内容，如对于一些大型门户网站的新闻会有城市站点的功能，如果没有设置相应的城市站点，默认就是根据用户访问的IP地址的所在城市自动设置。本文主要通过自定义扩展IHttpModule接口，考虑到性能IP数据库主要采用QQwry纯真IP数据库（但此数据库并非是官方的，我之前与ip138网站对比过，IP地址信息的准确性大概在90%左右），主要实现根据IP地址或地址段或IP所在城市进行自动跳转到指定页面的功能(支持Nginx作为前端反向代理服务器），该WebsiteSkip组件核心代码如下：

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using System;

using System.Collections.Generic;

using System.Text;

using System.Web;

using System.Xml;

using System.IO;

using System.Net;

using System.Text.RegularExpressions;

using NetOpen_System.Component.QQWry;

 

namespace NetOpen_System.Component

{

    public sealed class WebsiteSkipHttpModule : IHttpModule

    {

        #region IHttpModule 成员

 

        public void Dispose()

        {

        }

 

        public void Init(HttpApplication context)

        {

            context.BeginRequest += new EventHandler(context_BeginRequest);

        }

 

 

        #endregion

 

 

        void context_BeginRequest(object sender, EventArgs e)

        {

            try

            {

 

                //if (HttpContext.Current.Request.IsLocal)//忽略本地计算机请求

                //    return;

 

                //string ip = HttpContext.Current.Request.UserHostAddress;

                //string ip = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString();

                string ip = string.Empty;

                if (HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"] != null)

                {

                    ip = HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"].ToString();

                }

                else if (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)

                {

                    ip = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();

                }

                else if (HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null)

                {

                    ip = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();

                }

                else

                {

                    ip = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString();

                }

               

 

                QQWryLocator qqWry = new QQWryLocator(HttpContext.Current.Server.MapPath(@"~\IpData\qqwry.dat"));

 

                IPLocation ipaddress = qqWry.Query(ip);  //查询一个IP地址

 

                string ls_city = ipaddress.Country;

                string ls_urlfrom = string.Empty;

                string ls_urlto = string.Empty;

                string ls_url = HttpContext.Current.Request.Url.AbsoluteUri;

                string ls_useragentkeyword = string.Empty;

              

                ExcludeUserAgentMatchEngine Em = WebsiteSkipConfiguration.GetConfig().ExcludeUserAgents;

 

                if(Em.ExcludeUserAgentList.Count > 0)

                {

                    foreach (ExcludeUserAgent ua in Em.ExcludeUserAgentList)

                    {

                        if (HttpContext.Current.Request.UserAgent.Contains(ua.keyword))

                        {

                            return;

                        }

                    }

                }

 

                UrlMatchEngine pu = WebsiteSkipConfiguration.GetConfig().SkipedUrls;

 

                if (pu.UrlList.Count > 0)

                {

                    foreach (SkipedUrl sk in pu.UrlList)

                    {

              

                        if (ls_city.Contains(sk.IpCity))

                        {

                            if (sk.UrlFrom.Length > 0)

                            {

                                if (sk.UrlFrom.Contains(ls_url) && !ls_url.Contains(sk.OutKeyWord))

                                {

                                    if (sk.UrlTo.Length > 0)

                                    {

                                        HttpContext.Current.Response.Redirect(sk.UrlTo, true);

                                    }

                                    break;

                                }

                                

                            }

 

                            break;

                        }

                    }

                }

 

                if (WebsiteSkipConfiguration.GetConfig().IpChecks.GetIpIn(ip))

                {

                    ls_urlfrom = WebsiteSkipConfiguration.GetConfig().IpChecks.UrlFrom.Trim();

                    ls_urlto = WebsiteSkipConfiguration.GetConfig().IpChecks.UrlTo.Trim();

                    if (ls_urlfrom.Length > 0)

                    {

 

                        if (ls_urlfrom.Contains(ls_url) && !ls_url.Contains(WebsiteSkipConfiguration.GetConfig().IpChecks.OutKeyWord))

                        {

                            if (ls_urlto.Length > 0)

                            {

                                HttpContext.Current.Response.Redirect(ls_urlto, true);

                            }

              

                        }

 

                    

                    }

                }

              

                 

            }

            catch

            {

 

            }

        }

    }

}

在部署方面，非常简单主要利用IHttpModule接口并在Web.config中的HttpModule节点添加此组件的配置，访问限制或允许参数可以在NetOpen_SystemWebsiteSkip.cfg.xml进行设置，以下为一个简单的配置示例：

<?xml version="1.0" encoding="utf-8" ?>
<NetOpen_System>
  <WebsiteSkip>
    <SkipedUrl>
    <add ipcity="温州" urlfrom="http://examplesite.com/Default.aspx,http://examplesite.com/,http://examplesite.cn/,http://www.examplesite.cn" urlto="http://wz.mainwebsite.pcom/index.aspx" outkeyword="math"/>
    <add ipcity="镇江" urlfrom="http://examplesite.com/Default.aspx,http://examplesite.com/,http://examplesite.cn/,http://www.examplesite.cn" urlto="http://jszj.mainwebsite.com/index.aspx" outkeyword="math"/>
    </SkipedUrl>
    <SkipedIP>
     <add ip1="220.186.0.0" ip2="220.186.255.255" urlfrom="http://examplesite.com/Default.aspx,http://examplesite.com/,http://examplesite.cn/,http://www.examplesite.cn" urlto="http://wz.mainwebsite.com/index.aspx" outkeyword="math"/>
    </SkipedIP>
    <ExcludeUserAgent>
     <add keyword="Baiduspider">
     <add keyword="Sosospider">
     <add keyword="Sogou web spider">
     <add keyword="Sogou inst spider">
     <add keyword="Sogou-Test-Spider">
     <add keyword="Sogou Orion spider">
     <add keyword="Gigabot">
     <add keyword="0JJJSpider">
     <add keyword="Sogou Pic Spider">
     <add keyword="Googlebot">
     <add keyword="Yeti/1.0">
    </ExcludeUserAgent>
  </WebsiteSkip>
  </WebsiteSkip>
</NetOpen_System>

该组件源代码下载地址：https://websiteskip.codeplex.com/，欢迎访问下载！虽然该组件实现并不复杂，原理也很简单，但较为实用，后续将增加根据IP138的网站进行实时查询，这样IP地址信息将更为精确，但对性能可能会有一些影响。

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分类: ASP.NET, Sharepoint