Randomly request timeout (IIS6.0)

[felippe]

Hi!
I have got IIS 6.0 on Windows 2003 Server. I have installed HTTP
handler (as simple reverse-proxy) - code below. I created virtual
category with this dll and Wilcard application mapping set to
aspnet_isapi.dl l

Now everything works fine, but sometimes IIS stops working and return
'Error in /catalog Application. Request timeout...' And than i must
restart IIS (at least application pools).

Thanks for help,
Filip

Code of Handler.cs:

/*
Handler.cs; v 1.1; 2005/10/25; Filip Balicki
Script capture all references to selected in Web.config virtual
directory, and download resources from
selected (also in Web.config) remote host. (so it is work as
proxy)
*/

using System;
using System.Web;
using System.Net;
using System.Text;
using System.Text.Reg ularExpressions ;
using System.IO;
using System.Collecti ons;
using System.Configur ation;

namespace Polygon
{

public class Handler : IHttpHandler
{
string host_address
{
get
//Take local address (where this script
is installed) from
web.config
//http://my_domain/virtual_catalog/
{
return
ParseUrl(Config urationSettings .AppSettings["local_addr ess"]);
}
}
string dest_adress
{
get
//Take local address (where this script
is installed) from
web.config
//http://my_domain/virtual_catalog/
{
return
ParseUrl(Config urationSettings .AppSettings["destination_ho st"]);
}
}
public void ProcessRequest( HttpContext context)
{

string my_uri = context.Request .Url.ToString() ;
//construct real uri to remote host
string real_uri = Regex.Replace (my_uri,
host_address,de st_adress,Regex Options.Multili ne |
RegexOptions.Ig noreCase);
HttpWebRequest request = (HttpWebRequest )
WebRequest.Crea te(real_uri);
request.KeepAli ve = false;
request.AllowAu toRedirect = false;
HttpWebResponse response;
try
{
response = (HttpWebRespons e)
request.GetResp onse();
}
catch(System.Ne t.WebException we)
{
context.Respons e.StatusCode = 404;
context.Respons e.StatusDescrip tion =
"Not Found ("+we.Message+" )";
response = (HttpWebRespons e)
we.Response;
writeBody(conte xt, response);
return;
}
if (response.Statu sCode != HttpStatusCode. OK)
//Found not OK header - probably
redirect
{
context.Respons e.AddHeader("Lo cation",
response.Header s["Location"]);

context.Respons e.AddHeader("Co ntent-Type", response.Conten tType);
context.Respons e.StatusCode = (int)
response.Status Code;
}
else
{

context.Respons e.AddHeader("Co ntent-Type", response.Conten tType);
writeBody (context, response);
}
response.Close( );
context.Respons e.End();

}

public bool IsReusable
{
get
{
return true;
}
}

public string ParseUrl (string url)
{
if ((char)url[url.Length-1]!= '/')
{
url+='/';
}
return url;
}

public void writeBody (HttpContext context,
HttpWebResponse response)
{
Stream receiveStream =
response.GetRes ponseStream();
if
((response.Cont entType.ToLower ().IndexOf("htm l")>=0)

||(response.Con tentType.ToLowe r().IndexOf("ja vascript")>=0))
//if we get html or javascript use ASCI
mode
{
string body;
StreamReader readStream = new
StreamReader (receiveStream,
Encoding.Defaul t);
body = readStream.Read ToEnd();
context.Respons e.Write(body);
}
else
{
//the response is not HTML - use binary
mode
byte[] buff = new byte[1024];
int bytes = 0;
while( ( bytes = receiveStream.R ead(
buff, 0, 1024 ) ) > 0 )
{
//Write the stream directly to
the client

context.Respons e.OutputStream. Write (buff, 0, bytes );
}
}
response.Close( );
}

}