ViewExpiredException custom exception handler (available in JSF 2.0) can handle this case, but I had a need for another type of "Session" object to be monitored to determine if I should redirect based on its status. The other object was stored in the HttpSession object as an attribute so I decided to handle it with a Filter (@WebFilter).The first thing is to determine if the request is a
partial/ajax request. If it is a normal post, we can handle it with a HttpResponse.sendRedirect(String location) mechanism. If it is AJAX, we need to handle it in a completely different manner.
1 2 3 4 5 6 7 8 | private boolean isAJAXRequest(HttpServletRequest request) { boolean check = false; String facesRequest = request.getHeader("Faces-Request"); if (facesRequest != null && facesRequest.equals("partial/ajax")) { check = true; } return check;} |
Note: This is being intercepted in a Filter so I don't have access to the FacesContext. Here is a partial code snippet of how to send the redirect. You would need to set the variable
TARGET to go to the desired location.
1 2 3 4 5 6 7 8 9 10 11 12 | String redirectURL = response.encodeRedirectURL(request.getContextPath() + TARGET);if (isAJAXRequest(request)) { StringBuilder sb = new StringBuilder(); sb.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?><partial-response><redirect url=\"").append(redirectURL).append("\"></redirect></partial-response>"); response.setHeader("Cache-Control", "no-cache"); response.setCharacterEncoding("UTF-8"); response.setContentType("text/xml"); PrintWriter pw = response.getWriter(); pw.println(sb.toString()); pw.flush();} |
