ExternalAccessServlet problem

doblek — Mon, 26 Feb 2007 19:07:04 GMT

Hi,I've made a portlet that points to the node we want to navigate to using the ExternalAccessServlet and shows the content provided by the Alfresco WebClient using an IFrame html tag…In order to do so, the appropiate AuthenticationResult object (from which I can extract the ticket) is also created.

Re: ExternalAccessServlet problem

doblek — Thu, 01 Mar 2007 14:01:06 GMT

Hi,

I've made some tests and I think the problem is related to the logout action. It's like if Alfresco didn't realize that the session has ended… =/

Everytime the portlet detects the portal user changes, the portlet ends the session using webservices:

WebServiceFactory.getAuthenticationService().endSession(session.getTicket());‍

where session is the AuthenticationResult object returned when the session was started (using web services as well).
But, as I've said, it seems that Alfresco doesn't realize of the fact…

If I click on the Alfresco Web Client link that let the user logout, and refresh the page, the right content is displayed…

I'm thinking in force the logout using the ExternalAccessServlet functionality… Though it looks not too elegant, and besides, ending the session through web wervice should be enough, shouldn't it?

Am I wrong?

Any help would be very much appreciated. 😃

Regards,
Enrique

PS: sorry for my English

Re: ExternalAccessServlet problem

doblek — Mon, 05 Mar 2007 15:57:06 GMT

Hi again,

I finally almost solved the problem forcing the logout through the ExternalAccessServlet… using:

//Logout WebClient + WebServices
     private void web_client_logout(RenderResponse response)
        throws IOException{

               String logout_str;
                   logout_str = "http://";
                   logout_str += alfresco_server_address;
                   logout_str += ":" + alfresco_server_port;
                   logout_str += "/alfresco/navigate/logout";

               response.getWriter().println(logout_str);
               response.getWriter().println("<IFRAME SRC=\""+logout_str+"\" HEIGHT=\"0px\" WIDTH=\"0px\"></IFRAME>");
      
               if (session != null){
                    WebServiceFactory.getAuthenticationService().endSession(session.getTicket());
                    session = null;
   }
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Everything works fine except one case:
A user has been using the ExternalAccessServlet with a ticket. Then that user logs out, so the "guest" user tries to access the Servlet…
I see the following error message:

Estado HTTP 500 -

——————————————————————————–

type Informe de ExcepciÃ³n

mensaje

descripciÃ³n El servidor encontrÃ³ un error interno () que hizo que no pudiera rellenar este requerimiento.

excepciÃ³n

org.alfresco.error.AlfrescoRuntimeException: Failed to authenticate as Guest user.
   org.alfresco.web.app.servlet.AuthenticationHelper.authenticate(AuthenticationHelper.java:209)
   org.alfresco.web.app.servlet.BaseServlet.servletAuthenticate(BaseServlet.java:124)
   org.alfresco.web.app.servlet.ExternalAccessServlet.service(ExternalAccessServlet.java:82)
   javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

nota La traza completa de la causa de este error se encuentra en los archivos de diario de Apache Tomcat/5.5.17.

This is the complete error trace:

16:50:59,406 ERROR [org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/alfresco].[externalAccess]] Servlet.service() para servlet externalAccess lanzÃ³ excepciÃ³n
org.alfresco.error.AlfrescoRuntimeException: Failed to authenticate as Guest user.
   at org.alfresco.web.app.servlet.AuthenticationHelper.authenticate(AuthenticationHelper.java:209)
   at org.alfresco.web.app.servlet.BaseServlet.servletAuthenticate(BaseServlet.java:124)
   at org.alfresco.web.app.servlet.ExternalAccessServlet.service(ExternalAccessServlet.java:82)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
   at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
   at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
   at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
   at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
   at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.IllegalStateException: setAttribute: La SesiÃ³n ya ha sido invalidada
   at org.apache.catalina.session.StandardSession.setAttribute(StandardSession.java:1247)
   at org.apache.catalina.session.StandardSessionFacade.setAttribute(StandardSessionFacade.java:129)
   at org.alfresco.web.app.servlet.AuthenticationHelper.authenticate(AuthenticationHelper.java:180)
   … 17 more

But If I click on "refresh" button on navigator it displays the Homefolder for user "guest"…
Maybe I'm trying to access the ExternalAccessServlet too soon?

Why am I getting such error? It recognizes the "guest" user when nobody has accessed the servlet yet…

Can anyone help me?

Thanks in advance,
Enrique

PS: I'm using Alfresco 1.3, could this problem be solved in a later version?

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