HttpWebRequest/HttpWebResponse problem...

[Satinderpal Singh]

Hi everyone,

We are using HttpWebRequest to create a request to a URI, which requires us
to login first. In order to process all the transactions, first we have to
login and get the cookie value in a variable and make the request again with
that cookie as a header value (Digest Authentication).
But, the problem we are facing is: That the HttpWebRequest is getting two
responses simultaneously, which means that the code should wait after the
first response is received, throw an error, so that we can take the cookie
value and make a request again, but, its not working that way, the request
objects gets two values as response (we watched it through Packet Sniffer).
Packet Sniffer shows two responses received, the first one is 401 and the
second one is the successful one. Ideally it should break the code after
401, but it doesn't, any clue as to why it doesn't waits after the first
response ? Could there be any problem with the server ? Or anything wrong
with our code (mentioned below).

The server (ASPX URL) we are trying to connect has .NET Framework 1.1 and
Http/1.1

Following is the code we are using to get the response object from the
request:

HttpWebRequest request = null; // Holds the instance of Http request

try

{
request = (HttpWebRequest)WebRequest.Create(new Uri(uri));

if(ParameterTable.ContainsKey("UserName"))
{
if(ParameterTable.Contains("Password"))
{
request.Credentials = new NetworkCredential
((String)ParameterTable["UserName"],(String)ParameterTable["Password"]);
}
}

if(ParameterTable.ContainsKey("Cookie"))
{
if (!requestParameters.ContainsKey("Cookie"))
{
requestParameters.Add("Cookie",ParameterTable["Cookie"]);
}
}

if(ParameterTable.ContainsKey("Authorization"))
{
if (!requestParameters.ContainsKey("Authorization"))
{

requestParameters.Add("Authorization",ParameterTab le["Authorization"]);
}
}
if(UserAgent!=null && UserAgent!="")
{
request.UserAgent = UserAgent;
}
else
{
request.UserAgent = "RETSExpress/1.0";
}

HttpWebResponse wr = (HttpWebResponse)request.GetResponse();
StreamReader sr = new StreamReader(wr.GetResponseStream());
string abc = sr.ReadToEnd();
return (HttpWebResponse)request.GetResponse();

}

catch.... part...

In the above code either the value of abc should be both the responses, or
it should break after 401 and get in to the catch part. This code works
smooth with most of the URIs, its only one URI which is giving problem.

Responses Received:
----------------------------------------------------------------------------
----------------------------------------------------------------------------
--------------------------------------------------------
HTTP/1.1 401 Unauthorized
Server: Microsoft-IIS/5.0
Date: Wed, 02 Jun 2004 09:20:18 GMT
X-Powered-By: ASP.NET
X-AspNet-Version: 1.1.4322
WWW-Authenticate: Digest qop="auth", realm="Se****@metrolist.com",
nonce="40f1e303f5389bff1864edee6c308795",
opaque="c05d7e6b44c97bf3d38ccee27f34b10b"
RETS-Version: RETS/1.5
Local Time: 6/2/2004 3:20:17 AM
Request client: 203.200.29.119
Error: NO_NONCE
Set-Cookie: ASP.NET_SessionId=zm0hcr55iia33jbtx4czxibj; path=/
Set-Cookie: RETS-Session-ID=RETSSESS-252f7f30-d2ab-4944-847b-ed8f207c2628;
path=/
Cache-Control: private
Content-Type: text/xml
----------------------------------------------------------------------------
----------------------------------------------------------------------------
--------------------------------------------------------

Immediately after the above response, the next response it shows in Packet
Sniffer is:

----------------------------------------------------------------------------
----------------------------------------------------------------------------
--------------------------------------------------------
HTTP/1.1 200 OK
Server: Microsoft-IIS/5.0
Date: Wed, 02 Jun 2004 09:20:25 GMT
X-Powered-By: ASP.NET
X-AspNet-Version: 1.1.4322
WWW-Authenticate: Digest qop="auth", realm="Se****@metrolist.com",
nonce="40f1e303f5389bff1864edee6c308795",
opaque="c05d7e6b44c97bf3d38ccee27f34b10b"
RETS-Version: RETS/1.5
Local Time: 6/2/2004 3:20:24 AM
Request client: 203.200.29.119
Error:
Transfer-Encoding: chunked
Set-Cookie: ASP.NET_SessionId=ho1dj5vsbme0l52q4hzun33f; path=/
Cache-Control: private
Content-Type: text/xml; charset=utf-8
Though it should have returned back to the code after the 401 unauthorized
error as a WebException, which works fine with all the other URIs.

Any help would be highly appreciated. Sorry for a long description, but we
thought it would make sense to put as much info. as possible.

Thanks
Satinder

[Dino Chiesa [Microsoft]]

you have to stop multiposting.
-Dino

"Satinderpal Singh" <sa**********@planetasia.com> wrote in message
news:%2****************@tk2msftngp13.phx.gbl...

Hi everyone,

We are using HttpWebRequest to create a request to a URI, which requires us to login first. In order to process all the transactions, first we have to
login and get the cookie value in a variable and make the request again with that cookie as a header value (Digest Authentication).
But, the problem we are facing is: That the HttpWebRequest is getting two
responses simultaneously, which means that the code should wait after the
first response is received, throw an error, so that we can take the cookie
value and make a request again, but, its not working that way, the request
objects gets two values as response (we watched it through Packet Sniffer). Packet Sniffer shows two responses received, the first one is 401 and the
second one is the successful one. Ideally it should break the code after
401, but it doesn't, any clue as to why it doesn't waits after the first
response ? Could there be any problem with the server ? Or anything wrong
with our code (mentioned below).

The server (ASPX URL) we are trying to connect has .NET Framework 1.1 and
Http/1.1

Following is the code we are using to get the response object from the
request:

HttpWebRequest request = null; // Holds the instance of Http request

try

{
request = (HttpWebRequest)WebRequest.Create(new Uri(uri));

if(ParameterTable.ContainsKey("UserName"))
{
if(ParameterTable.Contains("Password"))
{
request.Credentials = new NetworkCredential
((String)ParameterTable["UserName"],(String)ParameterTable["Password"]);
}
}

if(ParameterTable.ContainsKey("Cookie"))
{
if (!requestParameters.ContainsKey("Cookie"))
{
requestParameters.Add("Cookie",ParameterTable["Cookie"]);
}
}

if(ParameterTable.ContainsKey("Authorization"))
{
if (!requestParameters.ContainsKey("Authorization"))
{

requestParameters.Add("Authorization",ParameterTab le["Authorization"]);
}
}
if(UserAgent!=null && UserAgent!="")
{
request.UserAgent = UserAgent;
}
else
{
request.UserAgent = "RETSExpress/1.0";
}

HttpWebResponse wr = (HttpWebResponse)request.GetResponse();
StreamReader sr = new StreamReader(wr.GetResponseStream());
string abc = sr.ReadToEnd();
return (HttpWebResponse)request.GetResponse();

}

catch.... part...

In the above code either the value of abc should be both the responses, or
it should break after 401 and get in to the catch part. This code works
smooth with most of the URIs, its only one URI which is giving problem.

Responses Received:
-------------------------------------------------------------------------- -- -------------------------------------------------------------------------- -- --------------------------------------------------------
HTTP/1.1 401 Unauthorized
Server: Microsoft-IIS/5.0
Date: Wed, 02 Jun 2004 09:20:18 GMT
X-Powered-By: ASP.NET
X-AspNet-Version: 1.1.4322
WWW-Authenticate: Digest qop="auth", realm="Se****@metrolist.com",
nonce="40f1e303f5389bff1864edee6c308795",
opaque="c05d7e6b44c97bf3d38ccee27f34b10b"
RETS-Version: RETS/1.5
Local Time: 6/2/2004 3:20:17 AM
Request client: 203.200.29.119
Error: NO_NONCE
Set-Cookie: ASP.NET_SessionId=zm0hcr55iia33jbtx4czxibj; path=/
Set-Cookie: RETS-Session-ID=RETSSESS-252f7f30-d2ab-4944-847b-ed8f207c2628;
path=/
Cache-Control: private
Content-Type: text/xml
-------------------------------------------------------------------------- -- -------------------------------------------------------------------------- -- --------------------------------------------------------

Immediately after the above response, the next response it shows in Packet
Sniffer is:

-------------------------------------------------------------------------- -- -------------------------------------------------------------------------- -- --------------------------------------------------------
HTTP/1.1 200 OK
Server: Microsoft-IIS/5.0
Date: Wed, 02 Jun 2004 09:20:25 GMT
X-Powered-By: ASP.NET
X-AspNet-Version: 1.1.4322
WWW-Authenticate: Digest qop="auth", realm="Se****@metrolist.com",
nonce="40f1e303f5389bff1864edee6c308795",
opaque="c05d7e6b44c97bf3d38ccee27f34b10b"
RETS-Version: RETS/1.5
Local Time: 6/2/2004 3:20:24 AM
Request client: 203.200.29.119
Error:
Transfer-Encoding: chunked
Set-Cookie: ASP.NET_SessionId=ho1dj5vsbme0l52q4hzun33f; path=/
Cache-Control: private
Content-Type: text/xml; charset=utf-8
Though it should have returned back to the code after the 401 unauthorized
error as a WebException, which works fine with all the other URIs.

Any help would be highly appreciated. Sorry for a long description, but we
thought it would make sense to put as much info. as possible.

Thanks
Satinder