RE: Facelets Back Button

[Vinaya Tirikkovalluru]

Hi Chris,

Thank you very much.
It worked just fine.

Thanks
Vinaya


-----Original Message-----
From: Christian Poecher [mailto:[EMAIL PROTECTED] 
Sent: Thursday, November 20, 2008 11:07 AM
To: users@myfaces.apache.org
Subject: Re: Facelets Back Button




Vinaya Tirikkovalluru wrote:
> 
> Hi,
> 
>  
> 
> I recently switched over to facelets.
> 
> Now all my jsps are xhtmls
> 
> How do I expire the page if the user clicks on browser back button?
> 
>  
> 
> Any ideas?
> 

Hi Vinaya,

I just did it via a Phase Listener. This would work on all JSF
implementations. The problem is though that due to a bug Firefox 3.0.x
ignore the cache settings. I saw that they consider it a major bug and
they
also have a patch read with the last modified date of yesterday. 

Here is the code:

import javax.faces.context.FacesContext;
import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;
import javax.faces.event.PhaseListener;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

public class NoBrowserCachePhaseListener implements PhaseListener {
        
        public void afterPhase(PhaseEvent event) {
                // Do nothing special
        }

        public void beforePhase(PhaseEvent event) {
                FacesContext facesContext = event.getFacesContext();
                HttpServletResponse response = (HttpServletResponse)
facesContext.getExternalContext().getResponse();
                response.addHeader("Pragma", "no-cache");
                response.addHeader("Cache-Control", "no-cache");
                response.addHeader("Cache-Control", "no-store");
                response.addHeader("Cache-Control", "must-revalidate");
                response.addHeader("Expires", "0"); 
        }

        public PhaseId getPhaseId() {
                return PhaseId.RENDER_RESPONSE;
        }
}

You need to add this to your faces-config.xml:

 <lifecycle>
   <phase-listener>NoBrowserCachePhaseListener</phase-listener>
 </lifecycle>

HTH,
Chris
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