Re: Rewritten URL and Forwarding to JSP

Thu, 13 Dec 2001 18:31:55 -0800 


Hi Sabari,

Thanks, I will give it a try.

E. Tse






"Sabari Arasu (CTC)" <[EMAIL PROTECTED]> on 12/13/2001 12:15:53 AM

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To:   [EMAIL PROTECTED]
cc:    (bcc: Elaine T. Tse/Telcordia)
Subject:  Re: Rewritten URL and Forwarding to JSP



Try
        session.invalidate();
        session = null;
        session = request.getSession(true);

Hope this helps.
Sabari

> -----Original Message-----
> From: E. Tse [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, December 12, 2001 9:59 PM
> To:   [EMAIL PROTECTED]
> Subject:      Rewritten URL and Forwarding to JSP
>
> Hi,
>
> I am new to web application development and have a puzzling question.
> I appreciate very much if you can provide some pointers in resolving it.
>
> In the LoginServlet's doPost() method, after the user is authenticated,
> I invalidate the current session and create a new session.
> Then I do a forward (instead of a redirect) to a JSP using rewritten URL.
>
>   session = request.getSession(false);
>   ...
>   session.invalidate();
>   session = request.getSession(true);
>   RequestDispatcher dispatcher = getServletContext().getRequestDispatcher
(
> response.encodeURL(lsURL) );
>   dispatcher.forward( request, response );
>
> The session ID that's encoded to the URL is the old session ID instead of
> the new one.
>
> I tried to remove all session attributes of the current session instead
of
> creating a new one and got a ConcurrentModificationException.
>
>   session = request.getSession(false);
>   ...
>   Enumeration attrNames = session.getAttributeNames();
>   String      attrName  = "";
>   while (attrNames.hasMoreElements())
>   {
>     attrName = (String)attrNames.nextElement();
>     session.removeAttribute( attrName );
>   }
>   RequestDispatcher dispatcher = getServletContext().getRequestDispatcher
(
> response.encodeURL(lsURL) );
>   dispatcher.forward( request, response );
>
> and got:
>
>   java.util.ConcurrentModificationException
>         at java.util.HashMap$HashIterator.next(HashMap.java:736)
>         at
> org.apache.catalina.util.Enumerator.nextElement(Enumerator.java:166)
>
>
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Title: RE: Rewritten URL and Forwarding to JSP

Try

    session.invalidate();
    session = null;
    session = request.getSession(true);

Hope this helps.
Sabari

    -----Original Message-----
    From:   E. Tse [SMTP:[EMAIL PROTECTED]]
    Sent:   Wednesday, December 12, 2001 9:59 PM
    To:     [EMAIL PROTECTED]
    Subject:        Rewritten URL and Forwarding to JSP

    Hi,

    I am new to web application development and have a puzzling question.
    I appreciate very much if you can provide some pointers in resolving it.

    In the LoginServlet's doPost() method, after the user is authenticated,
    I invalidate the current session and create a new session.
    Then I do a forward (instead of a redirect) to a JSP using rewritten URL.

      session = request.getSession(false);
      ...
      session.invalidate();
      session = request.getSession(true);
      RequestDispatcher dispatcher = getServletContext().getRequestDispatcher( response.encodeURL(lsURL) );
      dispatcher.forward( request, response );

    The session ID that's encoded to the URL is the old session ID instead of
    the new one.

    I tried to remove all session attributes of the current session instead of
    creating a new one and got a ConcurrentModificationException.

      session = request.getSession(false);
      ...
      Enumeration attrNames = session.getAttributeNames();
      String      attrName  = "";
      while (attrNames.hasMoreElements())
      {
        attrName = (String)attrNames.nextElement();
        session.removeAttribute( attrName );
      }
      RequestDispatcher dispatcher = getServletContext().getRequestDispatcher( response.encodeURL(lsURL) );
      dispatcher.forward( request, response );

    and got:

      java.util.ConcurrentModificationException
            at java.util.HashMap$HashIterator.next(HashMap.java:736)
            at org.apache.catalina.util.Enumerator.nextElement(Enumerator.java:166)

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