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:
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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