How to check a field using cq.HTTP.post method in adobe cq5?

Question

I am trying to validate a field by sending the field value to a servlet, and in return I get true or false. Whether this field is valid or not. here is my dialog file

  <bodytext
            jcr:primaryType="cq:Widget"
            fieldDescription="Type Text Here"
            fieldLabel="Body Text"
            name="./bodytext"
     validator= "function(value) {   
var dialog = this.findParentByType('dialog');  
var postParams = {};
postParams['value'] = value;

CQ.HTTP.post ('/ bin / feeds / validation.json', function (options, success, response) {response.valid? True: 'The form name already exists on this page.';}, PostParams);
} "xtype =" text box "/">

and here is my servlet code

import java.io.IOException;

import javax.servlet.ServletException;

import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.servlets.SlingAllMethodsServlet;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.apache.sling.commons.json.JSONException;
import org.apache.sling.commons.json.io.JSONWriter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.day.cq.commons.TidyJSONWriter;

public abstract class AbstractValidatorServlet extends SlingAllMethodsServlet {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private static final Logger LOG = LoggerFactory.getLogger(AbstractValidatorServlet.class);


    @Override
    protected final void doPost(final SlingHttpServletRequest request, final SlingHttpServletResponse response)
        throws ServletException, IOException {
        final String value = request.getRequestParameter("value").getString();
       final boolean valid = isValid(value);      
        response.setContentType("application/json");
        response.setCharacterEncoding("utf-8");


        try {
            final TidyJSONWriter writer = new TidyJSONWriter(response.getWriter());
            response.setContentType("application/json");
            //JSONWriter writer = new JSONWriter(response.getWriter());
                    try {
                    writer.object();
                    writer.key("valid").value(valid);
                    writer.endObject(); 

                } catch (JSONException e) {

                    e.printStackTrace();
                }
             }  catch (final IOException ioe) {
            LOG.error("error writing JSON response", ioe);
        }
    }

    /**
     * Validate the given value for this request and path.
     *
     * @param request servlet request
     * @param path path to current component being validated
     * @param value input value to validate
     * @return true if value is valid, false otherwise
     */
    protected abstract boolean isValid(final String value);

}



import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import org.apache.commons.lang.StringEscapeUtils;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Properties;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.Service;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.tidy.Tidy;

import com.adobe.granite.xss.XSSAPI;

@Component
@Service
@Properties({
    @Property(name="sling.servlet.paths",value="/bin/feeds/validation"),
    @Property(name = "sling.servlet.extensions", value = "json"),
    @Property(name = "sling.servlet.methods", value = "POST"),
    @Property(name = "sling.servlet.selectors", value = "validator"),
    @Property(name = "service.description", value = "XSS API HTML Validator Servlet")
})
public final class HTMLValidatorServlet extends AbstractValidatorServlet {

    private static final long serialVersionUID = 1L;
    private static final Logger LOG = LoggerFactory.getLogger(HTMLValidatorServlet.class);

    @Reference
    XSSAPI xssapi;

    @Override
    protected boolean isValid(final String value) {
            String data = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">"
                    + "<html xmlns=\"http://www.w3.org/1999/xhtml\"><title></title><body>"+StringEscapeUtils.unescapeHtml(value)+"</body></html>";

            Tidy tidy=new Tidy();
            tidy.setXmlTags(true); 
            tidy.setXHTML(true);
            StringWriter writer = new StringWriter(); 
            tidy.setErrout(new PrintWriter(writer)); 
            ByteArrayInputStream in = new ByteArrayInputStream(data.getBytes()); 
            ByteArrayOutputStream out = new ByteArrayOutputStream(); 
            tidy.parse(in,out); 
            int numErrors = tidy.getParseErrors();
            if(numErrors > 0) 
            { 
                return false;
            }
            else{
            return true;
            }
    }

}

I get aUnspecified Error in cq5. maybe someone where i'm missing. thanks in advance

Answer 1

, , Citytech Bedrock AbstractValidatorServlet. doGet. docs , resourceType GET.

@SlingServlet (resourceTypes = "bedrock/components/content/example", selectors = "validator", extensions = "json", methods = "GET" )

javascript validator

Bedrock.Utilities.Dialog.validateField(, , 'Name is ');

Answer 2

, json, . :

@Property(name = "sling.servlet.extensions", value = "json")

JS- url/bin/feeds/validation:

CQ.HTTP.post('/bin/feeds/validation', function(options, success, response){}

URL- /bin/feeds/validation.json, . json, html. json- com.day.cq.commons.TidyJSONWriter :

@Override
protected void doGet(final SlingHttpServletRequest request, final SlingHttpServletResponse response) throws ServletException, IOException {
    final TidyJSONWriter writer = new TidyJSONWriter(response.getWriter());
    response.setContentType("application/json");

    try {
        writer.object();
        writer.key("mykey").value("myvalue");
        writer.endObject();

    } catch(Exception e) {
      //handle the exceptions
    }
}