在asp.net2.0中的urlMappings倒是非常好用，可惜暂不支持正则表达式，不过，好在如果用IHttpModule的话 不管什么样的请求都会先经过IHttpModule这样就为URL重写提供了一个好机会： 下面是我写的一个IHttpModule: usingSystem; usingSystem.Web; publicclassReWriteModule:IHttpModule { publicReWriteModule() { } publicoverridestringToString() { returnthis.GetType().ToString(); } voidIHttpModule.Dispose() { } privatestaticSystem.Xml.XmlDocumentruleDoc=null; privatestaticSystem.Xml.XmlDocumentGetRuleConfig(System.Web.HttpContextapp) { if(ruleDoc==null) { ruleDoc=newSystem.Xml.XmlDocument(); ruleDoc.Load(app.Server.MapPath("~/rule.xml")); } returnruleDoc; } publicstaticstringGetUrl(System.Web.HttpContextcxt,stringpath) { System.Xml.XmlDocumentdoc=GetRuleConfig(cxt); System.Xml.XmlNodeListlst=doc.GetElementsByTagName("RewriterRule"); stringpat=""; foreach(System.Xml.XmlNodendinlst) { System.Xml.XmlNodeListsub=nd.ChildNodes[0].ChildNodes; foreach(System.Xml.XmlNodechkinsub) { pat="^"+chk.InnerText+"$"; System.Text.RegularExpressions.Regexreg=newSystem.Text.RegularExpressions.Regex(pat,System.Text.RegularExpressions.RegexOptions.Compiled|System.Text.RegularExpressions.RegexOptions.IgnoreCase); if(reg.IsMatch(path)) { returnreg.Replace(path,nd.ChildNodes[1].InnerText); } } } returnnull; } voidIHttpModule.Init(HttpApplicationcontext) { context.BeginRequest+=delegate(objectsender,EventArgse) { System.Web.HttpContextcxt=context.Context; if(cxt.Request.ContentType!="image/pjpeg") { stringtype=cxt.Request.ContentType.ToLower(); stringpath=cxt.Request.Path; stringapppath=cxt.Request.ApplicationPath; path=path.Remove(0,apppath.Length); path="~"+path; stringnewUrl=GetUrl(cxt,path.TrimEnd().TrimStart()); if(newUrl!=null) { cxt.Response.Filter=newResponseFilter(cxt.Response.Filter,cxt.Request.Path); cxt.Response.Write("请求的路径:"+path); cxt.Response.Write("<BR>"); cxt.Response.Write("转向的目的URL："+newUrl); cxt.Response.Write("<BR>"); cxt.RewritePath(newUrl); }//如果要求处理所有的请求时用到 //else //{ //cxt.Response.Write(cxt.Request.Path+"<BR>"); //cxt.Response.Write("你请求的资源不存在或无权访问！"); //cxt.Response.Flush(); //cxt.Response.End(); //} } }; } } 由于一旦进行了URL重写，原先的WEBFORM中的Action会发生改变，容易造成：请求的资源不存在问题 具体怎么样？各位DX看看就清楚了！！！ 所有才有了这个ResponseFilter了，实现如下， publicclassResponseFilter:System.IO.Stream { publicResponseFilter(System.IO.Streamsink,string_str) { _sink=sink; // //TODO:在此处添加构造函数逻辑 // this.str=_str; } privatestringstr=""; privateSystem.IO.Stream_sink; privatelong_position; privateSystem.Text.Encodingend=System.Text.Encoding.GetEncoding("GB18030"); privateSystem.Text.StringBuilderoOutput=newSystem.Text.StringBuilder(); //ThefollowingmembersofStreammustbeoverriden. publicoverrideboolCanRead { get{returntrue;} } publicoverrideboolCanSeek { get{returntrue;} } publicoverrideboolCanWrite { get{returntrue;} } publicoverridelongLength { get{return0;} } publicoverridelongPosition { get{return_position;} set{_position=value;} } publicoverridelongSeek(longoffset,System.IO.SeekOrigindirection) { return_sink.Seek(offset,direction); } publicoverridevoidSetLength(longlength) { _sink.SetLength(length); } publicoverridevoidClose() { _sink.Close(); } publicoverridevoidFlush() { _sink.Flush(); } publicoverrideintRead(byte[]buffer,intoffset,intcount) { return_sink.Read(buffer,offset,count); } //TheWritemethodactuallydoesthefiltering. publicoverridevoidWrite(byte[]buffer,intoffset,intcount) { stringszBuffer=System.Text.UTF8Encoding.UTF8.GetString(buffer,offset,count); stringap="action=\""; intpos=-1; if((pos=szBuffer.IndexOf(ap))!=-1) { intepos=szBuffer.IndexOf("\"",pos+ap.Length+1); if(epos!=-1) { szBuffer=szBuffer.Remove(pos+ap.Length,epos-pos-ap.Length); } szBuffer=szBuffer.Insert(pos+ap.Length,this.str); byte[]data=System.Text.UTF8Encoding.UTF8.GetBytes(szBuffer); _sink.Write(data,0,data.Length); } else { oOutput.Append(szBuffer); } //下面的这一段可以用来修改<Head></head>之间的内容； //RegexoEndFile=newRegex("</head>",RegexOptions.IgnoreCase|RegexOptions.Compiled); //if(oEndFile.IsMatch(szBuffer)) //{ ////Appendthelastbufferofdata ////附加上缓冲区中的最后一部分数据 //oOutput.Append(szBuffer); ////Getbackthecompleteresponsefortheclient ////传回完整的客户端返回数据 //stringszCompleteBuffer=oOutput.ToString().ToLower(); //intipos=szCompleteBuffer.IndexOf("<title>"); //intepos=szCompleteBuffer.IndexOf("</title>",ipos+7); //stringsp=szCompleteBuffer.Substring(ipos+7,epos-ipos); //szCompleteBuffer=szCompleteBuffer.Remove(ipos+7,sp.Length-7); //szCompleteBuffer=szCompleteBuffer.Insert(ipos+7,"dhz"); ////szCompleteBuffer=szCompleteBuffer.Replace(sp,"dhz"); ////Nomatch,sowriteoutoriginaldata ////没有匹配，因此写入源代码 //byte[]data=System.Text.UTF8Encoding.UTF8.GetBytes(szCompleteBuffer); //_sink.Write(data,0,data.Length); //} //else //{ //oOutput.Append(szBuffer); //} } } //////而重候规则呢则是用xml文件配置如下； 当然在web.config通过自定义配置节做也可以的 <?xmlversion="1.0"encoding="utf-8"?> <Rules> <RewriterRule> <LookFors> <LookFor>~/(\d{4})/(\d{2})\.html</LookFor> <LookFor>~/(\d{4})/(\d{2})/</LookFor> <LookFor>~/(\d{4})/(\d{2})</LookFor> <LookFor>~/(\d{4})/(\d{2})/index.html</LookFor> </LookFors> <SendTo>~/Pro.aspx?year=$1&month=$2</SendTo> </RewriterRule> <RewriterRule> <LookFors> <LookFor>~/pc</LookFor> </LookFors> <SendTo>~/Test2.aspx</SendTo> </RewriterRule> </Rules> //这个规则写的不好，如第一个就可以用一个正则表达式来做。
以上就是asp.net 2.0 中的URL重写以及urlMappings问题。只有行动才能抚平梦想带来的躁动不安。我们认定了只要奋斗，一切都还有希望，毕竟我们还年轻。于是，我们没日没夜的挑灯苦战，在旅途中挥洒着热血。然而总有些人会背道而驰。更多关于asp.net 2.0 中的URL重写以及urlMappings问题请关注haodaima.com其它相关文章！
