Getting jsp filename within a servlet

Hi,
I am trying to build a simple web app to get deeper into the basic of jsp/servlet programming.Until now I only used the JSF framework but I want to know some basics :)
For this little project I have 2 JSP Views with forms which will be send to the Controllerservlet where the servlet could access the Model. After that, the Servlet should redirect to the proper result page( depend on the form-views).
An Example:
I fill out a form at user.jsp. User.jsp sends the submit via POST to the Controllerservlet. Within the servlet I want to identify the name of the submitter (user.jsp) to select the proper result page via a redirect.
But how can I do this? I could only find methods inside the request object where I can get the servlet name. Is it possible to get "user.jsp" or should I use a hidden paramater to decide which result page I should "render"?
Thnx
Alex

Check out the HTTP header field "referer" (yes, the spelling is wrong in the standard). That tells you what page called the servlet, which will be your user.jsp. Just be careful with redirects because they change the referrer. You can get headers from the request object also using the getHeader() method.

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Hi,
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Thank You for your help.
I have sucessfully slove the problem. I am awarding you full 10 duke
dollors for it. I have anthoer problem about applets is listed in
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We have a J2EE app, using Struts + Tiles (build 1.1-b3), running on Win2KPro, Ora9ias v9.0.3. The application is roles-based, and different users see different versions of the same page based on their role authorizations. Occasionally, when multiple users in different roles are requesting the same page, the app returns the following exception:
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     at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:16)
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     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at com.gal.fast.portal.web.FastActionServlet.service(FastActionServlet.java:110)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
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     at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:283)
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     at com.gal.fast.portal.web.SessionInitializedFilter.doFilter(SessionInitializedFilter.java:105)
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     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:306)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:767)
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All the code in the two custom classes above ( com.gal.fast.portal.web.SessionInitializedFilter and com.gal.fast.portal.web.FastActionServlet ) has been commented out to the point that they are NOOP stubs.
We only see this with multiple near-simultaneous requests for the same page with differet roles. It smells like a threading issue to me, but I'm no expert (hence this post). Any thoughts?
--matt

We have a J2EE app, using Struts + Tiles (build 1.1-b3), running on Win2KPro, Ora9ias v9.0.3. The application is roles-based, and different users see different versions of the same page based on their role authorizations. Occasionally, when multiple users in different roles are requesting the same page, the app returns the following exception:
OracleJSP:
JSP Error:
Request URI:/fast/WEB-INF/jsp/tiles/layouts/baseLayout.jsp
Exception:
javax.servlet.ServletException: Cannot a get JSP page instance from a page being destroyed
     at oracle.jsp.runtimev2.JspPageInstFacade.getInstance(JspPageInstFacade.java:147)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:303)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:465)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:379)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
     at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:283)
     at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:16)
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     at web2d_inf._jsp._tiles._layouts._baseLayout._jspService(_baseLayout.java:445)
     [SRC:/WEB-INF/jsp/tiles/layouts/baseLayout.jsp:149]
     at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:317)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:465)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:379)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
     at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:283)
     at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:16)
     at com.gal.fast.portal.web.SessionInitializedFilter.doFilter(SessionInitializedFilter.java:105)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:556)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:306)
     at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:209)
     at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1033)
     at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:269)
     at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:249)
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     at org.apache.struts.action.RequestProcessor.processActionForward(RequestProcessor.java:401)
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     at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1422)
     at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:505)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at com.gal.fast.portal.web.FastActionServlet.service(FastActionServlet.java:110)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
     at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:283)
     at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:16)
     at com.gal.fast.portal.web.SessionInitializedFilter.doFilter(SessionInitializedFilter.java:105)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:556)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:306)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:767)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:148)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:72)
     at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:803)
     at java.lang.Thread.run(Thread.java:536)
All the code in the two custom classes above ( com.gal.fast.portal.web.SessionInitializedFilter and com.gal.fast.portal.web.FastActionServlet ) has been commented out to the point that they are NOOP stubs.
We only see this with multiple near-simultaneous requests for the same page with differet roles. It smells like a threading issue to me, but I'm no expert (hence this post). Any thoughts?
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Hey Joe what do you think of this solution.
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Hi all,
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Try the same code from an exploded web app.
          Niko Schmuck wrote:
          > Hi all,
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          > which is deployed as war). Does it make a difference if the web
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          > [Tomcat 4.1.10 doesn't have problems for that matter]
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          > at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:376)
          > at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:242)
          > at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:5360)
          > at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:721)
          > at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3043)
          > at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2468)
          > at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:152)
          > at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:133)
          >
          > TIA,
          > niko.
          Rajesh Mirchandani
          Developer Relations Engineer
          BEA Support

Getting jsp filename within a servlet

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