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
                }

            }



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

下载地址
http://msdn.microsoft.com/zh-cn/library/ms972974.aspx

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