ACS error handler for AEM unauthorised pages

@arunpatidar @rohan_garg @sarav_prakash @anupampat @martin_ecx_io @stiegjo22 @tad_reeves @ravi_pampana @pcprof  could you take a look at this question and share your thoughts? Your input would be really helpful!

Hi @jyothimo 

I think you can setup this via dispatcher.

https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/show-custom-404-error-message/m-p/711382 

Hey @jyothimo,

1. For dispatcher error handling do you have DispatcherPassError enabled along with ErrorDocument?
2. If you are unable to handle this at dispatcher you can probably use a Sling Filter to intercept requests, check if the user has access and then redirect to custom error page.
   Here's a sample code - 
   

   @Designate(ocd = AccessRestrictionFilter.Config.class)
   @Designate(ocd = AccessRestrictionFilter.class)
   @Component(immediate = true)
   public class AccessRestrictionFilter implements Filter {
   
       private static final String[] RESTRICTED_PATHS = {"/crx/de", "/system/console"};
   
       @Activate
       @Modified
       public void activate() {
           // Perform any initialization here, if necessary.
       }
   
       @Override
       public void doFilter(Request request, Response response, FilterChain chain) throws IOException, ServletException {
           String requestPath = request.getRequestPathInfo().getResourcePath();
   
           // Check if the user is trying to access restricted paths
           if (Arrays.asList(RESTRICTED_PATHS).contains(requestPath)) {
               if (!hasPermission(request)) {
                   response.sendRedirect("/content/unauthorized.html");
                   return;
               }
           }
   
           // Proceed to the next filter in the chain if authorized
           chain.doFilter(request, response);
       }
   
       private boolean hasPermission(Request request) {
           // Implement the logic to check if the user has the appropriate permissions
           // You could check the request user, roles, etc.
           return false;  // Change to true if the user has permissions
       }
   }

Hope this helps!

Rohan Garg