Re: NotificationSampleWebDav-Monitor OWA Inbox

Hello,

when you send your authentication cookies along a request in the
cookie-collection, the response should also contain new cookies. You can use
those cookies for further requests... this should keep ypur session alive.

Greetings,
Henning Krause

"VJ" <VJ@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:BC919A26-6F56-4E75-8D40-3B15333AE3C8@xxxxxxxxxxxxxxxx
Thank you for your quick response, seems I'm moving in the right
direction..

Can you guide me how can I update the cookie with new response.

Thanks,
VJ

"Henning Krause [MVP]" wrote:

Hello,

when you get this error, then your login-cookie is expired. You can
either
re-login or update your cookie with each response you get...

Greetings,
Henning Krause

"VJ" <VJ@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:A304B354-0E92-4BB4-ADFF-EAEFD280A6B4@xxxxxxxxxxxxxxxx
Hi,

I'm using the NotificationSampleWebDAV provided with Exchange SDK to
moniter
the MailBox over the excange server and process the inbox messages when
ever
new mail comes.Here I'm using the Subscribe and Poll methods of
WebDavAccessor. I'm using the application as it is, but the problem is
that
when I run the application continuoulsy for more then 20 min, I'm
getting
the following error

Warning: Exiting Action with an exception: The remote server returned
an
error: (440) Login Timeout.
Stack Trace for the excetion: at
System.Net.HttpWebRequest.CheckFinalStatus()
at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at System.Net.HttpWebRequest.GetResponse()

After through investigation i found that the server is creating the
SessionId and the session is expiring after 20 minutes.

I want to have the continues access to the exchange server.

Can any body help me to resolve this issue.

The code that I'm using is as follows,

static private string Action(string Uri, string Method, string
NotificationType, string SubscriptionID)
{
// Declare variables.
string XmlData = "";
Request = null;
byte[] bytes = null;
WebResponse requestResponse = null;
string Body = "";
NetworkCredential mycred = new
System.Net.NetworkCredential(Username,Password,Domain);

try
{
//accept ssl certificate
ServicePointManager.CertificatePolicy = new
AcceptAllCertificatePolicy();

//do form-based authentication
if (AuthCookies==null)
{
AuthCookies = DoFormbasedAuthentication(Uri, mycred);
}


// Create a new credentials cache.
System.Net.CredentialCache MyCredentialCache = new
System.Net.CredentialCache();

// Add user name, password, and domain to the credentials cache and use
NTLM authentication.
MyCredentialCache.Add(new Uri(Uri),"Basic", new
System.Net.NetworkCredential(Username,Password,Domain));

//accept ssl certificate
ServicePointManager.CertificatePolicy = new
AcceptAllCertificatePolicy();

// Create request object and assign credentials.
Request = (System.Net.HttpWebRequest) HttpWebRequest.Create(Uri);
Request.CookieContainer = new CookieContainer();

// Set the WebRequest credentials property to the credentials cache.
Request.Credentials = MyCredentialCache;


if (AuthCookies.Count == 2)
{
Request.CookieContainer.Add(AuthCookies);
}
else
{
throw new ApplicationException("Authentication cookies not set.");

}
switch(Method)
{
case "UNSUBSCRIBE":
Request.Method = "UNSUBSCRIBE";
Request.Headers.Add("subscription-id",SubscriptionID);
break;

case "POLL":
Request.Method = "POLL";
Request.Headers.Add("subscription-id",SubscriptionID);
break;

case "SUBSCRIBE":
Request.Method = "SUBSCRIBE";
Request.Headers.Add("Notification-type",NotificationType);
Request.Headers.Add("Subscription-lifetime","12000");
if(SubscriptionID != "0" && SubscriptionID != "-1")
{
Request.Headers.Add("subscription-id",SubscriptionID);
}
Request.Headers.Add("Depth","1");
break;
case "SEARCH":
Request.Method = "SEARCH";
//retrieve subject and href for all emails that have an
//attachment
Body = "<?xml version=\"1.0\"?><D:searchrequest xmlns:D = \"DAV:\" >"
+ "<D:sql>SELECT \"urn:schemas:httpmail:subject\" FROM \"" + Uri + "\""
+ "WHERE \"DAV:ishidden\" = false AND \"DAV:isfolder\" = false"
+ " AND \"urn:schemas:httpmail:hasattachment\" = true"
+ "</D:sql></D:searchrequest>";

Request.ContentType = "text/xml";
//Request.Headers.Add("Brief","t");
break;
case "X-MS-ENUMATTS":
Request.Method = "X-MS-ENUMATTS";
//Request.Headers.Add("subscription-id",SubscriptionID);
Body = "<?xml version=\"1.0\" ?><NoResponse></NoResponse>";
Request.Headers.Add("Depth","1,noroot");
Request.ContentType = "text/xml";
break;
case "DELETE":
Request.Method = "DELETE";
Request.Headers.Add("Depth","infinity");
Request.ContentType = "text/xml";
break;

default:
Trace.WriteLine("Warning: Case missed in Action method");
Request.Method = Method;
Request.Headers.Add("translate","f");
Request.ContentType = "text/xml";
Request.Headers.Add("Overwrite","t");
break;
}

// The SUBSCRIBE, POLL, AND UNSUBSCRIBE methods do not
// require a method request body.


// Encode the body using UTF-8.

bytes = Encoding.UTF8.GetBytes((string)Body);

// Set the content header length.
Request.ContentLength = bytes.Length;
try
{

Stream newStream = Request.GetRequestStream();
newStream.Write(bytes, 0, bytes.Length);

newStream.Close();
}
catch(Exception ex)
{
Trace.WriteLine("Stact Trace:" + ex.Message +"---"+ ex.StackTrace);
}


}

// If the server is not available, the exception will be
caught
here.
catch(Exception ex)
{
Trace.WriteLine("Exiting Action with an EXCEPTION when
handling stream: " + ex.Message);
Trace.WriteLine("Stack Trace: " + ex.StackTrace);
throw ex;
}


try
{
// Call the method and get the response from the server.
requestResponse = Request.GetResponse();
if (requestResponse.ContentLength == 0)
{
LastInterpretedResult = (bool)false;
}

try
{
// Get the subscription ID.
LastSubscriptionID =
requestResponse.Headers.Get("Subscription-ID");
if (LastSubscriptionID == null)
{
LastSubscriptionID = "0";
}
}
catch
{
// If the SUBSCRIBE method is not being called, then
set
LastSubscriptionID
// to zero.re
LastSubscriptionID = "0";
}

// Get returned XML stream.
Stream ReceiveStream = requestResponse.GetResponseStream();

//set response stream on object
LastResponseStream = ReceiveStream;


// Get the utf-8 encoding object.
Encoding encode = System.Text.Encoding.GetEncoding("utf-8");
StreamReader sr = new StreamReader( ReceiveStream, encode );

// Read the XML to the end.
XmlData = sr.ReadToEnd();

if (XmlData.IndexOf("412 Precondition Failed") > 0)
{
// The POLL method failed.
LastSubscriptionID = "-1";
}

if (XmlData.IndexOf("Operation timed-out") > 0)
{
LastSubscriptionID = "-1";
}

if (XmlData.IndexOf("(440) Login Timeout.") > 0)
{
LastSubscriptionID = "-1";
}

if (XmlData.IndexOf("200 OK") > 0)
{
// The WebDAV method succeeded.
LastInterpretedResult = (bool)true;
LastPollResult = (int)LastPollEnum.NotifyTrue;
}
else
{
if (XmlData.IndexOf("No Content") > 0)
{
LastPollResult = (int)LastPollEnum.NoFolder;
}
else
{
LastPollResult = (int)LastPollEnum.NotifyFalse;
}
LastInterpretedResult = (bool)false;
}

}
catch (Exception ex)
{
// A few of the most important and common errors. For
more
detail see the
// SDK documentation.
//
// 403 - Forbidden - This means there is not enough
access
to create this folder.
// 405 - Method not allowed - This can mean the user is
overwriting a folder (among
// other things).
// 404 - Not found - This is often used to find out if
something exists.
// 505 - Server unavailable.
// 500 - Internal Server Error

// Throw a clean version of the internal server error.
if (XmlData.IndexOf("500 Internal Server Error") > 0)
{
throw new ApplicationException("An internal server
error occured, unable to complete request.");
}

if (XmlData.IndexOf("Operation timed-out") > 0)
{
LastSubscriptionID = "-1";
}

if (XmlData.IndexOf("(440) Login Timeout.") > 0)
{
LastSubscriptionID = "-1";
}

Trace.WriteLine("Warning: Exiting Action with an
exception:
" + ex.Message );
Trace.WriteLine("Stack Trace for the excetion: " + ex.StackTrace );
//Trace.WriteLine("{0}"+ ex.InnerException);


.

Relevant Pages

  • Re: NotificationSampleWebDav-Monitor OWA Inbox
    ... re-login or update your cookie with each response you get... ... Warning: Exiting Action with an exception: The remote server returned an ... // Create request object and assign credentials. ... Stream newStream = Request.GetRequestStream; ...
    (microsoft.public.exchange.applications)
  • Re: Problems with access to a web page
    ... Server: Apache ... Connection: close ... Look what I get now when I send the exact same request ... and got exactly the same 0 length response ...
    (microsoft.public.windows.inetexplorer.ie6.browser)
  • Re: BASIC authentication Issues with IE - Part II - Solved but WHY?
    ... REQUEST and RESPONSE logging below to show you whats going on. ... using my local machine web server. ... However, at this point I am logged in and I have lots of links, one is a "who is online" link client?who.wcn, which I will open this up in a second window. ...
    (microsoft.public.inetserver.iis.security)
  • Re: HTTP header processing sequence
    ... Initially it sends the request for the html source, and if there are any more objects to request it does so, and then wait for the server to reply sending back the requested data using appropriate headers. ... How does the (browser) client know how to match up multiple received responses from the server with GET-requests, as this does not appear to be sequential. ... So the association of request and response is no problem. ...
    (microsoft.public.win32.programmer.networks)
  • Re: Screen Scraping a Password Protected Site
    ... http traffic. ... cookies to a singleton CookieContainer and the once you have logged in ... If TypeOf request Is HttpWebRequest Then ... If TypeOf response Is HttpWebResponse Then ...
    (microsoft.public.dotnet.languages.vb)