using System;
using System.Web;
using System.Web.UI;

namespace AspxBoy.VisualUrl
{
 ///

 /// VisualUrlHttpHander 的摘要说明。
 ///

 public class VisualUrlHttpHander : IHttpHandlerFactory
 {
  #region IHttpHandlerFactory 成员

  public void ReleaseHandler(IHttpHandler handler)
  {
   // TODO:  添加 VisualUrlHttpHander.ReleaseHandler 实现
  }

  public IHttpHandler GetHandler(HttpContext context, string requestType, string url, string pathTranslated)
  {
   // TODO:  添加 VisualUrlHttpHander.GetHandler 实现

   string rawUrl = context.Request.RawUrl.Trim();

   ///
   ///这里只示范地址是http://domainname/xxx
   ///和http://domainname/xxx/这样的地址
   ///
   string userName = rawUrl.TrimStart('/').TrimEnd('/');
   string sendToUrl = url;
   string filePath = pathTranslated;
   string sendToUrlLessQString;
                                          
   sendToUrl = Globals.AppPath + "/get.aspx?username=" + userName;

   globals.rewriteurl(context, sendToUrl, out sendToUrlLessQString, out filePath);
   
   return PageParser.GetCompiledPageInstance(sendToUrlLessQString, filePath, context);
  }

  

  #endregion

 }

 public class Globals
 {
  ///

  /// 应用程序路径
  ///

  public static string AppPath
  {

   get
   {
    string applicationPath = "/";
    
    if(HttpContext.Current != null)   
    {
     applicationPath = HttpContext.Current.Request.ApplicationPath;
    }

    if (applicationPath == "/")
    {
     return string.Empty;
    }
    else
    {
     if (applicationPath.EndsWith("/"))
     {
      return applicationPath;
     }
     else
     {
      return applicationPath + "/";
     }
    }

   }
  }
  ///

  /// 在ASP.NET中执行URL重写
  /// see http://www.aspxboy.com/484/archive.aspx
  ///

  ///
  ///
  ///
  ///
  public static  void RewriteUrl(HttpContext context, string sendToUrl, out string sendToUrlLessQString, out string filePath)
  {
   if (context.Request.QueryString.Count > 0)
   {
    if (sendToUrl.IndexOf('?') != -1) 
    {
     sendToUrl += "&" + context.Request.QueryString.ToString();
    }
    else
    {
     sendToUrl += "?" + context.Request.QueryString.ToString();
    }
   }

   string queryString = String.Empty;
   sendToUrlLessQString = sendToUrl;
   if (sendToUrl.IndexOf('?') > 0)
   {
    sendToUrlLessQString = sendToUrl.Substring(0, sendToUrl.IndexOf('?'));
    queryString = sendToUrl.Substring(sendToUrl.IndexOf('?') + 1);
   }

   filepath = string.Empty;
   filePath = context.Server.MapPath(sendToUrlLessQString);

   context.rewritepath(sendtourllessqstring, String.Empty, queryString);
  }
 }
}