DisplayTag and saveToken/isValidToken Struts

Like Alcohol and Driving... "Never mix them" when you're working with reports and you have enabled export feature.
Because org.apache.struts.taglib.html.TOKEN is being pased as parameter to the export link generated in your report.
It works only if you're displaying only one report, but if you have multiple reports displayed based on the first one, just apply this technique foR preventing doble submission on the first method of your DispatchAction, on the next one and so on, don't do it. public ActionForward showScreen(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { //Display screen first time, so I can generate my token this.saveToken(request); return mapping.findForward(GenericConstants.SUCCESS); }

Now my report my screen is displayed, and I submit my form to the next method on my dispatchAction

public ActionForward displayFirstReport(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { if(this.isTokenValid(request)){ //Avoided double submit //this.saveToken(request); //This is the right way!!! (when you save data - but on reports doesn't work) } return mapping.findForward(GenericConstants.SUCCESS); }
The next method to be invoked shouldn't implement Tokens public ActionForward displayNextReport(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { return mapping.findForward(GenericConstants.SUCCESS); }