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url重写实现任意二级域名或多级域名(修正参数中断问题)

2007-12-08 01:08 489 查看

url重写实现任意二级域名或多级域名(修正参数中断问题)

简要回顾:
修改微软的URLRewrite能够对URL进行重写,这里要求对域名进行重写,实现http://1234.abc.com/http://www.abc.com/show.aspx?id=1234的重写。
步骤:1、你的域名 http://www.abc.com/ 是泛解析的,并在IIS里添加了主机头为空的映射;
2、修改微软的URLRewriter,要改两个地方
(1).BaseModuleRewriter.cs


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 = "^" + 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复制到你项目的bin目录下。

3、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>

注意:
问题出来了,很多人做了,实现了域名的跳转,但很多人都是转到了首页,这里不是lookfor / to /default.aspx 的问题,我自己也遇到了这样的问题,你需要在重写规则里加一个“/”在lookFor的结尾什么的规则改后成了:


<RewriterRule>


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


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


</RewriterRule>

再一个问题,就是修改后的重写对参数的不友好,重写后的URL如果带有参数如http://www.abc.com/news.html?id=1000,重写就返回404.下面提供重写后参数中断的解决方法:
方法一:
修改重写规则,让正则表达式接受参数:


<RewriterRule>


<LookFor>http://(/d+)/.abc/.com/news.html(.{0,})</LookFor>


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


</RewriterRule>
然后你的各种参数都可以匹配到NEWS页面,比如ID,分页等,在页面里就可以正常使用参数了。

方法二:
修改上面的BaseModuleRewriter.cs


protected virtual void BaseModuleRewriter_AuthorizeRequest(object sender, EventArgs e)






{


HttpApplication app = (HttpApplication) sender;
string path = app.Request.Url.AbsoluteUri;
if(path.Contains("?"))
{
path = path.Split('?')[0];
}
Rewrite(path, app);

}

把带“?”的绝对URL拆开,只去匹配不带参数的URL。

方法三:
修改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 = "^" + rules[i].LookFor + "(.{0,})$";




// 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 = "^" + rules[i].LookFor + "$"; 改成string lookFor = "^" + rules[i].LookFor + "(.{0,})$";

结束
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我的项目网站:www.at0086.com 有不少二级域名比如:hotel.at0086.com ,重写的例子有www.at0086.com/cn/69973/12/

参考的内容你用谷歌都可以搜到,不列举了。有需要编译好的DLL的朋友联系我。我的QQ 278199993,邮箱:xiaohc@gmail.com
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