使用HttpModule实现多个域名分别“绑定”到子目录-.NET教程,Asp.Net开发

如果您对httpmodule的编成非常熟悉那么可以向下进行了

一。 先把配置文件从web.config内移出为了不让web.config变的非常臃肿，我们将配置文件从web.config内移出
假设我们的多域名绑定配置文件为“mulitdomain.config“
将rewriterconfiguration.cs的public static rewriterconfiguration getconfig()方法
修改如下:

/// 

/// 从xml配置文件中返回重写信息
/// 
/// rewriterconfiguration
public static rewriterconfiguration getconfig()
{
rewriterconfiguration config = (rewriterconfiguration) boovoocache.get(cachekey);
if(config == null)
{
// 2005-08-18 wu meibo update the config file to siteurls.config
// httpcontext.current.cache.insert("rewriterconfig", configurationsettings.getconfig("rewriterconfig"));

///************************************************************************************
///  
///  author:活靶子，huobazi
///　date:2005-08-18
///
///  description:将配置文件移到单独的文件内，更新以下代码，原代码（上一行）停止工作
///
///************************************************************************************

string filepath = string.empty;
if(httpcontext.current != null)
{
filepath = httpcontext.current.server.mappath("~/mulitdomain.config");
}
else
{
filepath = directory.getcurrentdirectory() + path.directoryseparatorchar + "mulitdomain.config";
}

xmlserializer ser = new xmlserializer(typeof(rewriterconfiguration)); 
filestream filereader = new filestream(filepath, filemode.open, fileaccess.read, fileshare.read); 
streamreader reader = new streamreader(filereader); 
config = (ser.deserialize(reader)) as rewriterconfiguration; 
reader.close(); 
filereader.close(); 
if (file.exists(filepath)) 
{ 
cachedependency dep = new cachedependency(filepath); 
boovoocache.max(cachekey,config,dep); 
boovoocache.resetfactor(config.cachefactor);
} 
}

return config;
} 

二。做一些修补
rewritermodule.cs内

public virtual void init(httpapplication app) 
{

///**********************************************************************************
///  author:活靶子，huobazi
///　date:2005-08-18
///  description:增加beginrequest,在内增加防止黑客可能利用的某些url漏洞攻击的代码
///**********************************************************************************

app.beginrequest += new eventhandler(this.rewritermodule_beginrequest);

// 警告！此代码不适用于 windows 身份验证！
// 如果使用 windows 身份验证，
// 请改为 app.beginrequest

app.authorizerequest += new eventhandler(this.rewritermodule_authorizerequest);


} 

protected virtual void rewritermodule_beginrequest(object o , eventargs e)
{
httpapplication app = ((httpapplication)(o)); 
httpserverutility server = app.server; 
httprequest request = app.request; 

///************************************************************
///  author:活靶子，huobazi
///　date:2005-08-18
///　description:修补黑客可能采用".."的方法进入其他目录的问题
///************************************************************

string strurl = server.urldecode(request.rawurl); 
if (strurl.indexof("..") != -1) 
{ 
throw new httpexception(404, "not found"); 
} 

///**********************************************************************************
///  author:活靶子，huobazi
///　date:2005-08-18
///　description:修补"规范化"问题　see: http://support.microsoft.com/?kbid=887459
///***********************************************************************************

if (request.path.indexof(\\) >= 0 ||
path.getfullpath(request.physicalpath) != request.physicalpath) 
{
throw new httpexception(404, "not found");
}
} 

三。开始匹配域名

protected void rewrite(string requestedpath, system.web.httpapplication app)
{
string host = app.context.request.url.host.tostring().tolower();

app.context.trace.write("rewritermodule", "entering modulerewriter");   
rewriterrulecollection rules = rewriterconfiguration.getconfig().rules; 
for(int i = 0; i < rules.count; i++)
{//将mulitdomain.config内定义的规则lookfor的值逐个匹配当前主机名判断否被定义了需要重写
//如果匹配则需要重写，那将请求重写到sendto定义的目录内的该文件
string lookfor = "^" + rules[i].lookfor + "$";
//string lookfor = "^" + rewriter.resolveurl(app.context.request.applicationpath, rules[i].lookfor + requestedpath) + "$";
regex re = new regex(lookfor, regexoptions.ignorecase);
if (re.ismatch(host))
{
string sendtourl = rewriter.resolveurl(app.context.request.applicationpath,  rules[i].sendto + requestedpath);
app.context.trace.write("rewritermodule", "rewriting url to " + sendtourl);
rewriter.rewriteurl(app.context, sendtourl);
break;
}
} 
app.context.trace.write("rewritermodule", "exiting modulerewriter");
}

四。写规则文件
mulitdomain.config的匹配规则如下：