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！

来源：互联网发布：js 封装好的confirm 编辑：程序博客网时间：2024/06/10 01:50

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; 
  
namespaceNetOpen_System.Component 
{ 
    publicsealed classWebsiteSkipHttpModule : IHttpModule 
    {
        #region IHttpModule 成员
  
        publicvoid Dispose() 
        {
        }
  
        publicvoid Init(HttpApplication context)
        {
            context.BeginRequest +=new EventHandler(context_BeginRequest);
        }
  
  
        #endregion
  
  
        voidcontext_BeginRequest(objectsender, 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();
                stringip = string.Empty;
                if(HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"] !=null) 
                {
                    ip = HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"].ToString();
                }
                elseif (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] !=null) 
                {
                    ip = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
                }
                elseif (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 
  
                stringls_city = ipaddress.Country; 
                stringls_urlfrom = string.Empty;
                stringls_urlto = string.Empty;
                stringls_url = HttpContext.Current.Request.Url.AbsoluteUri; 
                stringls_useragentkeyword = string.Empty;
               
                ExcludeUserAgentMatchEngine Em = WebsiteSkipConfiguration.GetConfig().ExcludeUserAgents;
  
                if(Em.ExcludeUserAgentList.Count > 0)
                {
                    foreach(ExcludeUserAgent ua inEm.ExcludeUserAgentList) 
                    {
                        if(HttpContext.Current.Request.UserAgent.Contains(ua.keyword))
                        {
                            return;
                        }
                    }
                }
  
                UrlMatchEngine pu = WebsiteSkipConfiguration.GetConfig().SkipedUrls;
  
                if(pu.UrlList.Count > 0) 
                {
                    foreach(SkipedUrl sk inpu.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