ASP.NET中实现二级或多级域名(修改UrlRewrite)

大家应该知道，微软的URLRewrite能够对URL进行重写，但是也只能对域名之后的部分进行重写，而不能对域名进行重写，如：可将 http://http://www.abc.com//1234/ 重写为 http://www.abc.com/show.aspx?id=1234 但不能将
http://1234.abc.com/ 重写为 http://www.abc.com/show.aspx?id=1234。

要实现这个功能，前提条件就是 http://www.abc.com/ 是泛解析的，再就是要修改一下URLRewriter了。
总共要修改2个文件

1.BaseModuleRewriter.cs


protected virtual void BaseModuleRewriter_AuthorizeRequest(object sender, EventArgs e)






{


HttpApplication app = (HttpApplication) sender;


Rewrite(app.Request.Path, app);


}

改为


protected virtual void BaseModuleRewriter_AuthorizeRequest(object sender, EventArgs e)






{


HttpApplication app = (HttpApplication) sender;


Rewrite(app.Request.Url.AbsoluteUri, app);


}

就是将 app.Request.Path 替换成了 app.Request.Url.AbsoluteUri

2.ModuleRewriter.cs


for(int i = 0; i < rules.Count; i++)






{


// get the pattern to look for, and Resolve the Url (convert ~ into the appropriate directory)


string lookFor = "^" + RewriterUtils.ResolveUrl(app.Context.Request.ApplicationPath, rules[i].LookFor) + "$";





// Create a regex (note that IgnoreCase is set

)


Regex re = new Regex(lookFor, RegexOptions.IgnoreCase);





// See if a match is found


if (re.IsMatch(requestedPath))






{


// match found - do any replacement needed


string sendToUrl = RewriterUtils.ResolveUrl(app.Context.Request.ApplicationPath, re.Replace(requestedPath, rules[i].SendTo));





// log rewriting information to the Trace object


app.Context.Trace.Write("ModuleRewriter", "Rewriting URL to " + sendToUrl);





// Rewrite the URL


RewriterUtils.RewriteUrl(app.Context, sendToUrl);


break; // exit the for loop


}


}

改为


for(int i = 0; i < rules.Count; i++)






{


// get the pattern to look for, and Resolve the Url (convert ~ into the appropriate directory)


string lookFor = "^" + rules[i].LookFor + "$";





// Create a regex (note that IgnoreCase is set

)


Regex re = new Regex(lookFor, RegexOptions.IgnoreCase);





// See if a match is found


if (re.IsMatch(requestedPath))






{


// match found - do any replacement needed


string sendToUrl = RewriterUtils.ResolveUrl(app.Context.Request.ApplicationPath, re.Replace(requestedPath, rules[i].SendTo));





// log rewriting information to the Trace object


app.Context.Trace.Write("ModuleRewriter", "Rewriting URL to " + sendToUrl);





// Rewrite the URL


RewriterUtils.RewriteUrl(app.Context, sendToUrl);


break; // exit the for loop


}


}

将

string lookFor = "^" + RewriterUtils.ResolveUrl(app.Context.Request.ApplicationPath, rules[i].LookFor) + "$";

改成了

string lookFor = "^" + rules[i].LookFor + "$";

完成这2处改动之后重新编译项目，将生成的dll复制到bin目录下。

再就是写web.config里的重写正则了


<RewriterRule>


<LookFor>http://(/d+)/.abc/.com</LookFor>


<SendTo>/show.aspx?id=$1</SendTo>


</RewriterRule>

好了大功告成，你在IE地址栏输入http://1234.abc.com/，就可以看到http://www.abc.com/show.aspx?id=1234

的结果了