Sachin S. Khanna wrote:
<snip>
"...Another thing, you would have to check for the token
string in every jsp page to see whether the user is logged on, if not then
you must direct the user to the log on page."
</snip>
Which is another good reason for using the Model 2 framework that has been
discussed so much on this list. Check the list archives for a lot of great
info.
Scott
----- Original Message -----
From: Chin Sung Kit <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, October 23, 2000 12:39 PM
Subject: help,invalidate session
> hi,
>
> i have a problem invalidating the user's session.
>
> i have a <a href> link, if the user clicks on this link, it is supposed
> to sign out the user - HttpSession.invalidate();
>
> my jsp code:
> <%
> String signout = request.getParameter("signout");
> if (signout != null)
> userSession.invalidate();
> %>
>
> i'm using tomcat3.1
>
> thanks for any help/suggestion.
>
> ced
>
> below is the error:
> Internal Servlet Error:
>
> javax.servlet.ServletException:
> at
>
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImp
l.java:386)
>
> at
>
jsp._0002fjsp_0002fsignin_0002ejspsignin_jsp_23._jspService(_0002fjsp_0002fs
ignin_0002ejspsignin_jsp_23.java:149)
>
> at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java, Compiled
> Code)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java,
> Compiled Code)
> at
>
org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.ja
va,
> Compiled Code)
> at
> org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java,
> Compiled Code)
> at org.apache.jasper.runtime.JspServlet.service(JspServlet.java,
> Compiled Code)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java,
> Compiled Code)
> at
> org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java,
> Compiled Code)
> at
> org.apache.tomcat.core.ContextManager.service(ContextManager.java,
> Compiled Code)
> at
>
org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpC
onnectionHandler.java,
> Compiled Code)
> at
> org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java,
> Compiled Code)
> at java.lang.Thread.run(Unknown Source)
>
> Root cause:
>
> java.lang.NullPointerException:
> at
>
jsp._0002fjsp_0002fsignin_0002ejspsignin_jsp_23._jspService(_0002fjsp_0002fs
ignin_0002ejspsignin_jsp_23.java:136)
>
> at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java, Compiled
> Code)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java,
> Compiled Code)
> at
>
org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.ja
va,
> Compiled Code)
> at
> org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java,
> Compiled Code)
> at org.apache.jasper.runtime.JspServlet.service(JspServlet.java,
> Compiled Code)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java,
> Compiled Code)
> at
> org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java,
> Compiled Code)
> at
> org.apache.tomcat.core.ContextManager.service(ContextManager.java,
> Compiled Code)
> at
>
org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpC
onnectionHandler.java,
> Compiled Code)
> at
> org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java,
> Compiled Code)
> at java.lang.Thread.run(Unknown Source)
>
>
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> Some relevant FAQs on JSP/Servlets can be found at:
>
> http://java.sun.com/products/jsp/faq.html
> http://www.esperanto.org.nz/jsp/jspfaq.html
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>
===========================================================================
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Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
===========================================================================
To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST".
Some relevant FAQs on JSP/Servlets can be found at:
http://java.sun.com/products/jsp/faq.html
http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
