Note:-   Found some issue  & working on fixing it. Till then please do not use the package.

The standard error handler for handling http errors described at [1]. This error handling mechanism [1] doesn't apply to POST operations (Ex:- [2]). The article demonstrate the feature PostResponseCreator [3] which helps achieve error handling for post operation. Based on my personal experience When using any product I recommend always

• Never neglect implementing custom error pages because most security holes happen from here.
• To give consistent look and feel like logo, headlines,message etc..

The steps are simple

• Implement PostResponseCreator
• Sample Example below (Download and install Sample package of above example.)

package com.sample.errorhandler;

import java.io.IOException;
import javax.servlet.http.HttpServletResponse;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Service;
import org.apache.felix.scr.annotations.Property;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.servlets.post.HtmlResponse;
import org.apache.sling.servlets.post.PostResponse;
import org.apache.sling.servlets.post.AbstractPostResponse;
import org.apache.sling.servlets.post.PostResponseCreator;


@Component
@Service

public class PostResponseErrorHandler implements PostResponseCreator{

    public static final String RP_SEND_ERROR =":sendError";
   
//responses to be sent back to the client and logic is written in createPostResponse method
   
    public PostResponse createPostResponse(SlingHttpServletRequest req) {
        if (req.getParameter(RP_SEND_ERROR) == null) {
            return new AbstractPostResponse() {
                public void onChange(String type, String... arguments) {
                    // NO-OP
                }             
                @Override
                protected void doSend(HttpServletResponse response) throws IOException {
                    response.setContentType("text/html");
                    response.setCharacterEncoding("UTF-8");                   
                    response.getWriter().write("Thanks for reading article !");
                    response.getWriter().write("Place Holder for your layout !");
                    response.getWriter().flush();
                }
               
            };
        } else {
            return null;
        }
    }
}

• Output after installing the package and following [2] is shown below

My Special thanks to Paul Perry, Antonio Sanso sharing the feedback.


[1]    http://docs.adobe.com/docs/en/aem/6-0/develop/platform/customizing-errorhandler-pages.html

[2]
-   Login at http://localhost:4502/libs/cq/ui/resources/cq-ui.html
-   Click on "Migrate"
-   A standard error message displayed by showing:


[3]   https://docs.adobe.com/docs/en/aem/6-0/develop/ref/javadoc/org/apache/sling/servlets/post/PostResponseCreator.html