根据微软官方伪静态UrlRewrite.dll源码,自己改写应用进项目中。
1、首先，我们写个用于HttpModule请求的类 RolesProvider
using System;using System.Text;using System.Web;using System.Web.Security;using System.Security.Principal;public class RolesProvider : IHttpModule{ //页面初始化 public void Init(HttpApplication context) { context.AuthorizeRequest += new EventHandler(this.BaseModuleRewriter_AuthorizeRequest); context.AuthenticateRequest += new EventHandler(context_AuthenticateRequest); //context.BeginRequest += new EventHandler(context_BeginRequest); context.Error += new EventHandler(context_Error); } /// /// 伪静态处理 /// /// /// protected virtual void BaseModuleRewriter_AuthorizeRequest(object sender, EventArgs e) { HttpContext context = ((HttpApplication)sender).Context; string host = context.Request.ServerVariables["HTTP_HOST"].ToLower(); //获取当前主机头 string requestPath = context.Request.Path.ToLower(); //当前请求路径 不带域名 /**这边也可以做301处理功能**/ context.Trace.Write("ModuleRewriter", "Entering ModuleRewriter"); UtilsUrlRewrite.UrlRewrite(RewriterConfiguration.GetConfig("ConfigUrlRewrite", "ConfigUrlRewrite.config"), requestPath, context); //伪静态核心代码 详见下UtilsUrlRewrite.cs context.Trace.Write("ModuleRewriter", "Exiting ModuleRewriter"); } /// /// 建立用户标识时 /// void context_AuthenticateRequest(object sender, EventArgs e) { } /// /// 请求出错时 /// /// /// void context_Error(object sender, EventArgs e) { /*CmsSafe.UrlError();*/ } public void Dispose() { }} 2、UtilsUrlRewrite.cs 伪静态处理核心代码
/**由于是参考官网例子，伪静态规则语法不变。以下代码可直接复制，设置下伪静态文件地址就可以。**/using System;using System.Web;using System.Web.Caching;using System.Collections;using System.Collections.Generic;using System.Text;using System.Configuration;using System.Xml;using System.Xml.Serialization;using System.Text.RegularExpressions;public class UtilsUrlRewrite{ public static void UrlRewrite(RewriterRuleCollection rules, string requestPath, HttpContext context) { for (int i = 0; i < rules.Count; i++) { string lookFor = "^" + UtilsUrlRewrite.ResolveUrl(context.Request.ApplicationPath, rules[i].LookFor) + "$"; Regex re = new Regex(lookFor, RegexOptions.IgnoreCase); if (re.IsMatch(requestPath)) { string sendToUrl = UtilsUrlRewrite.ResolveUrl(context.Request.ApplicationPath, re.Replace(requestPath, rules[i].SendTo)); context.Trace.Write("ModuleRewriter", "Rewriting URL to " + sendToUrl); UtilsUrlRewrite.RewriteUrl(context, sendToUrl); break; } } } internal static void RewriteUrl(HttpContext context, string sendToUrl) { // see if we need to add any extra querystring information if (context.Request.QueryString.Count > 0) { if (sendToUrl.IndexOf('?') != -1) sendToUrl += "&" + context.Request.QueryString.ToString(); else sendToUrl += "?" + context.Request.QueryString.ToString(); } string queryString = String.Empty; string sendToUrlLessQString = sendToUrl; if (sendToUrl.IndexOf('?') > 0) { sendToUrlLessQString = sendToUrl.Substring(0, sendToUrl.IndexOf('?')); queryString = sendToUrl.Substring(sendToUrl.IndexOf('?') + 1); } context.RewritePath(sendToUrlLessQString, String.Empty, queryString); } internal static string ResolveUrl(string appPath, string url) { if (url.Length == 0 || url[0] != '~') return url; else { if (url.Length == 1) return appPath; if (url[1] == '/' || url[1] == '\\') { if (appPath.Length > 1) return appPath + "/" + url.Substring(2); else return "/" + url.Substring(2); } else { if (appPath.Length > 1) return appPath + "/" + url.Substring(1); else return appPath + url.Substring(1); } } } } [Serializable()] [XmlRoot("RewriterConfig")] public class RewriterConfiguration { public static RewriterRuleCollection GetConfig(string cache, string filename) { if (HttpContext.Current.Cache[cache] == null) { RewriterRuleCollection rc = new RewriterRuleCollection(); RewriterRule r; string filePath = UtilsString.MapPath("~/App_Data/" + filename); //伪静态文件地址 XmlDocument xd = new XmlDocument(); xd.Load(filePath); XmlNodeList items = xd.DocumentElement.ChildNodes; foreach (XmlNode item in items) { if (item.HasChildNodes == true) { r = new RewriterRule(); r.LookFor = item["LookFor"].InnerText; r.SendTo = item["SendTo"].InnerText; rc.Add(r); } } UtilsCache.AddCache(cache, rc, UtilsCache.GetCacheDependency(filePath)); return rc; } return (RewriterRuleCollection)HttpContext.Current.Cache[cache]; } } [Serializable()] public class RewriterRule { private string lookFor, sendTo; public string LookFor { get { return lookFor; } set { lookFor = value; } } public string SendTo { get { return sendTo; } set { sendTo = value; } } } [Serializable()] public class RewriterRuleCollection : CollectionBase { /// /// Adds a new RewriterRule to the collection. /// /// A RewriterRule instance. public virtual void Add(RewriterRule r) { this.InnerList.Add(r); } /// /// Gets or sets a RewriterRule at a specified ordinal index. /// public RewriterRule this[int index] { get { return (RewriterRule)this.InnerList[index]; } set { this.InnerList[index] = value; } } }} 3、伪静态规则文件 ConfigUrlRewrite.config ,只列出有代表性的规则
~/404.(html|aspx) ~/default.aspx?s=404 ~/([\w]+)-list([0-9]+).(html|aspx) ~/default.aspx?s=$1&menuid=$2 ~/([\w]+)-id([0-9]+).(html|aspx) ~/default.aspx?s=$1&id=$2
4、在网站根目录web.config中注册HttpModule
到这就可以实现自定义伪静态功能了，跟官方UrlRewrite.dll没什么区别，就是少引用dll文件，还有可以把规则写在自己的xml或config文件中，好用xml类去操作管理。IIS6应用没有问题，IIS7+版本HttpModule 暂未学习配置。
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