473,326 Members | 2,095 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,326 software developers and data experts.

How do u set classic ASP session variables from an ASP.NET application???

My project currently requires that I integrate an ASP.NET application with
an ASP application. One of the issues I'm having is that I have some very
long strings being created in an ASP.NET application that need to somehow
appear in a classic ASP session. The strings are too long for cookies or
URLs and I'd like to avoid using a database or someother temporary server
storage.

So far what I've come up with is a .NET class that "spoofs" a post to an ASP
page specifically designed to load its post data into the session. The post
spoof involves a System.NET.HTTPWebRequest object, copying the HTTP headers
from HTTPContext.Current.Request, and creating a post data byte array.

What i've found so far is that even though it would appear my HTTPWebRequest
object has a cookie in its headers containing the ASP session identifier for
an already established ASP session, the request causes a new ASP session to
be created. Also, it appears that my post data isn't making it to the ASP
page that is responsible for mapping the post data into the ASP session.

Any advice or information would be greatly apreciated//

Below is the source code from my current class
================================================== ==========
/// <summary>
/// <c>ASPSession</c> is an adapter for moving data from the .NET runtime
to a traditional ASP session
/// This is accomplished by maintaining a local collection of name-value
pairs, then including these pairs in
/// a POST request to a traditional ASP page that is ultimately responsible
for committing the name-value pairs to an ASP session
/// ** this means that in order to function correctly, this class requires
the existence of the described receiver ASP page
///
/// Sample VBScript code for ASP receiver page
/// <%
///
/// for each formKey in Request.Form
/// if ( InStr( Upper( formKey ), "SESSIONKEY." ) ) then
/// session( Replace( Upper( formKey ), "SESSIONKEY.", "" ) ) =
Request.Form( formKey )
/// end if
/// next
///
/// %>
/// </summary>
public class ASPSession
{

#region Fields

private const String _ASP_RECEIVER_PAGE = "RuntimeToSessionReceiver.asp";
private const String _ASP_RECEIVER_CONTENTTYPE =
"application/x-www-form-urlencoded";
private const String _ASP_SESSIONKEY_POST_PREFIX = "SessionKey.";
private StringDictionary _aspSessionValues;
private HttpWebRequest _aspReceiverRequest;

#endregion

#region Constructors

/// <summary>
/// Creates a new instance of ASPSession
/// </summary>
public ASPSession()
{
_aspSessionValues = new StringDictionary();
configureASPReceiverRequest();
}

#endregion

#region Public Members

/// <summary>
/// Gets or Sets name-value pairs for submission to an existing ASP
session
/// </summary>
public String this[ String ASPSessionKeyName ]
{
get
{
if( _aspSessionValues.ContainsKey( ASPSessionKeyName ) )
{
return _aspSessionValues[ ASPSessionKeyName ];
}
else
{
return null;
}
}
set
{
if( _aspSessionValues.ContainsKey( ASPSessionKeyName ) )
{
_aspSessionValues[ ASPSessionKeyName ] = value;
}
else
{
_aspSessionValues.Add( ASPSessionKeyName, value );
}
}
}

/// <summary>
/// Executes an HTTP POST request containing the current collection of
name-value pairs to the ASP receiver page
/// * If it is determined that there are no name-value pairs to post, no
request is made.
/// </summary>
public void SetVars()
{
if( _aspSessionValues.Count > 0 )
{
setHeaders();
Byte[] postData = getPostData();
if( postData != null )
{
_aspReceiverRequest.ContentLength = postData.Length;
Stream sendStream = _aspReceiverRequest.GetRequestStream();
sendStream.Write( postData, 0, postData.Length );
sendStream.Close();
HttpWebResponse response = ( HttpWebResponse )
_aspReceiverRequest.GetResponse();
StreamReader reader = new StreamReader( response.GetResponseStream() );
String test = reader.ReadToEnd();
reader.Close();
}
}
}

#endregion

#region Private members

private void configureASPReceiverRequest()
{
String receiverURL;
if( String.Compare( HttpContext.Current.Request.ServerVariables[
"HTTPS" ], "on", true ) == 0 )
{
receiverURL = "https://";
}
else
{
receiverURL = "http://";
}
receiverURL += HttpContext.Current.Request.Url.Host + "/" +
_ASP_RECEIVER_PAGE;
_aspReceiverRequest = (
HttpWebRequest )System.Net.HttpWebRequest.Create( receiverURL );
_aspReceiverRequest.ContentType = _ASP_RECEIVER_CONTENTTYPE;
_aspReceiverRequest.Method = "POST";
}

private void setHeaders()
{
_aspReceiverRequest.Headers.Clear();
foreach( String headerName in HttpContext.Current.Request.Headers )
{
try
{
_aspReceiverRequest.Headers.Add( headerName,
HttpContext.Current.Request.Headers[ headerName ] );
}
catch( ArgumentException )
{
// Some headers are restricted (why, i'm not sure) and will cause an
ArgumentException to occur
}
}
}

private Byte[] getPostData()
{
String sessionKey;
String postDataString = String.Empty;
foreach( DictionaryEntry aspSessionEntry in _aspSessionValues )
{
sessionKey = aspSessionEntry.Key.ToString();
if( sessionKey.Length > 0 )
{
postDataString += String.Format(
"&{0}={1}",
HttpUtility.UrlEncode( String.Format( "{0}{1}",
_ASP_SESSIONKEY_POST_PREFIX, sessionKey ) ),
HttpUtility.UrlEncode( aspSessionEntry.Value.ToString() )
);
}
}
if( postDataString.Length == 0 ) return null;
postDataString = postDataString.Substring( 1 );
return Encoding.ASCII.GetBytes( postDataString );
}

#endregion

}
Nov 19 '05 #1
0 1796

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

2
by: Wynter | last post by:
I've been smacking into one brick wall after the next in converting some of my code from ASP Classic to ASP.NET. This one is a real bugger. I use Session Variables to help with User Security. If they...
4
by: Tony | last post by:
I have a classic ASP application that determines whether a user is logged in by examining a Session Variable, Session("LoginId"). Once logged in there is a link to a new search page (.aspx) this...
4
by: Chris Newby | last post by:
My project currently requires that I integrate an ASP.NET application with an ASP application. One of the issues I'm having is that I have some very long strings being created in an ASP.NET...
2
by: Wynter | last post by:
I've been smacking into one brick wall after the next in converting some of my code from ASP Classic to ASP.NET. This one is a real bugger. I use Session Variables to help with User Security. If they...
0
by: DolphinDB | last post by:
Tired of spending countless mintues downsampling your data? Look no further! In this article, you’ll learn how to efficiently downsample 6.48 billion high-frequency records to 61 million...
0
by: ryjfgjl | last post by:
ExcelToDatabase: batch import excel into database automatically...
1
isladogs
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 6 Mar 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM). In this month's session, we are pleased to welcome back...
0
by: Vimpel783 | last post by:
Hello! Guys, I found this code on the Internet, but I need to modify it a little. It works well, the problem is this: Data is sent from only one cell, in this case B5, but it is necessary that data...
0
by: jfyes | last post by:
As a hardware engineer, after seeing that CEIWEI recently released a new tool for Modbus RTU Over TCP/UDP filtering and monitoring, I actively went to its official website to take a look. It turned...
1
by: PapaRatzi | last post by:
Hello, I am teaching myself MS Access forms design and Visual Basic. I've created a table to capture a list of Top 30 singles and forms to capture new entries. The final step is a form (unbound)...
1
by: Defcon1945 | last post by:
I'm trying to learn Python using Pycharm but import shutil doesn't work
0
by: af34tf | last post by:
Hi Guys, I have a domain whose name is BytesLimited.com, and I want to sell it. Does anyone know about platforms that allow me to list my domain in auction for free. Thank you
0
by: Faith0G | last post by:
I am starting a new it consulting business and it's been a while since I setup a new website. Is wordpress still the best web based software for hosting a 5 page website? The webpages will be...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.