Persistemt https session?


G

Guest

Hi, I am trying to connect to an https server and download a file. The server
requires a client side certificate, which I have loaded successfully using
the X509Certificate class. I then add this certificate to the HttpWebRequest
class and connect to the server.

The problem arises because the initial request to the server gets a 302
redirect response. This response is OK, and is also recieved in IE7. The
second request in IE7 is not redirected, and I can download the file
successfully. However, if I try this from my C# client I get the redirect on
the first and second request. Is the SSL connection being renegotiated at
every request?

Code:
static HttpWebRequest GetHttpRequest()
{
X509Certificate cert = new X509Certificate(@"c:\cert.P12", "somePassword");
string url = "https://www.cdinternet.com/Reports/someTextFile.TXT";
Uri clearstream = new Uri(url);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(clearstream);
request.ClientCertificates.Add(cert);
request.Proxy = GetProxy();
request.AllowAutoRedirect = false;
request.ProtocolVersion = HttpVersion.Version10;
request.KeepAlive = true;
HttpRequestCachePolicy noCachePolicy = new
HttpRequestCachePolicy(HttpRequestCacheLevel.NoCacheNoStore);
request.CachePolicy = noCachePolicy;
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET
CLR 1.1.4322; .NET CLR 2.0.50727)";
request.PreAuthenticate = false;
request.Pipelined = true;
return request;
}

I am calling this method by:
request = GetHttpRequest();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
stream = response.GetResponseStream();
..... process stream.....
.... repeat the request...
request = GetHttpRequest();
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
stream = response.GetResponseStream();
..... process stream.....

Any advice would be welcome. If I have left out any necessary detail please
let me know.

Thanks,
David.
 
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G

Guest

This is the reply I get from the server:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<HTML><HEAD>
<TITLE>302 Found</TITLE>
</HEAD><BODY>
<H1>Found</H1>
The document has moved <A HREF=" / " >here</A>.<P>
</BODY></HTML>

If I set the AllowAutoRedirect propert on the HttpWebRequest to true, the
app just hangs when doing the request.GetResponse().

As mentioned before I get this response every time the request is made. IE7
redirects the first time the page is requested, but gets the document on the
second request.

Thanks in advance!
 
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G

Guest

Problem solved :)
The server was sending back a cookie as part of the response. To fix the
problem all I had to do was set this cookie value on the second request
object. Voila!

Hope this is useful to someone in the future....

Many Thanks,
David.
 

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