asp.net 1.1中url重写的问题

王朝asp·作者佚名  2006-11-24
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1:asp.net1.1中重写中可删节的问题!!!

如以下的正则表达式:

<Rules>

<RewriterRule>

<LookFors>

<LookFor>~/(\d{4})/(\d{2})\.html</LookFor>---------<1>

<LookFor>~/(\d{4})/(\d{2})/</LookFor>--------------<2>

<LookFor>~/(\d{4})/(\d{2})</LookFor>-----------<3>

<LookFor>~/(\d{4})/(\d{2})/index.html</LookFor>----<4>

</LookFors>

<SendTo>~/Pro.aspx?year=$1&amp;month=$2</SendTo>

</RewriterRule>

</Rules>

其中的1,4可以正常映射到对应的页面

可2,3则会出现http404错误!!!

其原因在于IIS本身的处理流程,解决办法则是在网站自己重写404处理错误!!!

1:自定义处理404错误的URL(在IIS中配置,在web.config中的配置对重写无用)

2:在System.Web节中添加如下节:

<httpHandlers>

<add verb="*" path="404.aspx" type="lt.Http404,lt"></add>

</httpHandlers>

<httpModules>

<add type="lt.ReWriteModule,lt" name="ModuleRewriter" />

</httpModules>

源代码如下:

public class Http404:System.Web.IHttpHandler

{

public Http404()

{

//

// TODO: 在此处添加构造函数逻辑

//

}

#region IHttpHandler 成员

public void ProcessRequest(System.Web.HttpContext context)

{

// TODO: 添加 Http404.ProcessRequest 实现

string errorPath=context.Request.RawUrl.Split(new char[]{';'})[1];

string appPath=context.Request.ApplicationPath;

int ipos=errorPath.IndexOf(appPath);

string url=errorPath.Substring(ipos+appPath.Length );

// if(!url.EndsWith("/"))

// {

// url+="/";

// }

// url+="index.html";

// context.Response.Write(url);

// context.RewritePath(url);

//context.Response.Write(url);

url="~"+url;

string newUrl =lt.ReWriteModule.GetUrl(context,url);

//context.Response.Write(newUrl);

if (newUrl != null)

{

//cxt.Response.Filter = new ResponseFilter(cxt.Response.Filter,cxt.Request.Path);

context.Response.Write("请求的路径:" + url);

context.Response.Write("<BR>");

context.Response.Write("转向的目的URL:" + newUrl);

context.Response.Write("<BR>");

context.RewritePath(newUrl);

}

else

{

context.Response.Write("你请求的资源不存在!!");

context.Response.End ();

}

}

public bool IsReusable

{

get

{

// TODO: 添加 Http404.IsReusable getter 实现

return false;

}

}

///////////////配置节处理中的httpModule如下:

public class ReWriteModule:System.Web.IHttpModule

{

public ReWriteModule()

{

//

// TODO: 在此处添加构造函数逻辑

//

}

#region IHttpModule 成员

public void Init(System.Web.HttpApplication context)

{

// TODO: 添加 ReWriteModule.Init 实现

context.BeginRequest+=new EventHandler(this.ReWrite);

}

private static System.Xml.XmlDocument ruleDoc = null;

private static System.Xml.XmlDocument GetRuleConfig(System.Web.HttpContext app)

{

if (ruleDoc == null)

{

ruleDoc = new System.Xml.XmlDocument();

ruleDoc.Load(app.Server.MapPath("~/rule.xml"));

}

return ruleDoc;

}

public static string GetUrl(System.Web.HttpContext cxt,string path)

{

System.Xml.XmlDocument doc = GetRuleConfig(cxt);

System.Xml.XmlNodeList lst= doc.GetElementsByTagName("RewriterRule");

string pat="";

foreach (System.Xml.XmlNode nd in lst)

{

System.Xml.XmlNodeList sub = nd.ChildNodes[0].ChildNodes;

foreach(System.Xml.XmlNode chk in sub)

{

pat = "^" + chk.InnerText+"$";

System.Text.RegularExpressions.Regex reg = new System.Text.RegularExpressions.Regex(pat, System.Text.RegularExpressions.RegexOptions.Compiled | System.Text.RegularExpressions.RegexOptions.IgnoreCase);

if(reg.IsMatch(path))

{

return reg.Replace(path, nd.ChildNodes[1].InnerText);

}

}

}

return null;

}

private void ReWrite(object sender,EventArgs e)

{

System.Web.HttpContext cxt =(sender as System.Web.HttpApplication).Context;

if (cxt.Request.ContentType != "image/pjpeg")

{

string type = cxt.Request.ContentType.ToLower();

string path = cxt.Request.Path;

string apppath = cxt.Request.ApplicationPath;

path = path.Remove(0, apppath.Length);

path = "~" + path;

string newUrl = GetUrl(cxt, path.TrimEnd().TrimStart());

if (newUrl != null)

{

//cxt.Response.Filter = new ResponseFilter(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);

}

//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();

//}

}

}

public void Dispose()

{

// TODO: 添加 ReWriteModule.Dispose 实现

}

#endregion

}

---------rule.xml的配置如下:

<?xml version="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</Look

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