UrlRewriter.dll伪静态实现二级域名泛解析
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.115sou.com/qq/ 重写为 http://www.115sou.com/show.aspx?id=qq
但不能将 http://qq.115sou.com/ 重写为 http://www.115sou.com/index.aspx?id=qq。
要实现这个功能，前提条件就是 http://www.115sou.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+)\.115sou\.com/</LookFor> <SendTo>/show.aspx?id=$1</SendTo> </RewriterRule>
好了大功告成，你在IE地址栏输入http://shouji.115sou.com/，就可以看到http://www.115sou.com/index.aspx?id=shouji
的结果了
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