merchant id validation not working in MacOS Sierra

I'm trying to validate the merchant but it does not seems to be working . I have converted the merchant_id.cer file is converted to .pem file. Now, how the .pem file is used in Javascript or MyValidationServlet to validate merchant?

javascript is here

var e = new ApplePaySession(1, g);

console.log("ApplePaySession : " + e);

console.dir("ApplePaySession Contents : " + e);

e.onshippingcontactselected = function(i) {

var h = i.shippingContact;

console.log("Shipping Contact Selected : " + h)

};

e.onvalidatemerchant = function(h) {

console.log("Start Merchant Validation");

c(h.validationURL)

};

function c(j) {

console.log("Performing Validation");

var k = {

merchantIdentifier: "merchant.com.def.abc",

domainName: "abc.def.com",

displayName: "merchant.com.def.abc",

};

var h = "applePayURL=" + j + "&applePayPostData=" + JSON.stringify(k);

var i = new XMLHttpRequest();

i.onreadystatechange = function() {

if (i.readyState == 4 && i.status == 200 && i.responseText) {

var l = JSON.parse(i.responseText);

console.log("HTTP Status 200" + l);

f(l)

}

console.log("XMLHTTP Status : " + i.status + " :: XMLHTTP ReponseText : " + i.responseText)

};

e.onshippingmethodselected = function(j) {

console.log("On Shipping Method Selected : " + j);

const h = j.shippingMethod.identifier === "free" ? "0.00" : "5.00";

const k = j.shippingMethod.identifier === "free" ? "8.99" : "13.99";

const l = [{

label: "Shipping",

amount: h,

}, ];

const i = {

label: "Apple Pay Example",

amount: k,

};

e.completeShippingMethodSelection(ApplePaySession.STATUS_SUCCESS, i, l)

};

i.open("POST", "/cart/MyValidateServlet", true);

i.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

i.send(h);

return false

}

MyValidateServlet.java is below

package com.xyz.test;

import java.io.IOException;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import org.apache.http.HttpResponse;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.StringEntity;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClients;

import atg.servlet.GenericServletService;

public class MyValidateServlet extends GenericServletService{

public void service(ServletRequest pServletRequest, ServletResponse pServletResponse) throws IOException, ServletException {

String applePayURL = (String) pServletRequest.getParameter("applePayURL");

String applePayPostData = (String) pServletRequest.getParameter("applePayPostData");

System.out.println("applePayURL : "+applePayURL);

System.out.println("applePayPostData : "+applePayPostData);

System.setProperty("javax.net.debug", "all");

HttpPost request = null;

try {

CloseableHttpClient client = HttpClients.createDefault();

System.out.println("HttpClient : "+client);

request = new HttpPost(applePayURL);

StringEntity stringEntity = new StringEntity(applePayPostData);

request.setEntity(stringEntity);

System.out.println("Request Entity : "+request.getEntity());

System.out.println("Request that is being executed : "+request);

System.out.println("Executing HttpClient request....");

HttpResponse response = client.execute(request);

System.out.println("HTTP Response : "+response);

int statusCode = response.getStatusLine().getStatusCode();

System.out.println("Response Status Code :: " + statusCode);

if(statusCode != 200) {

System.out.println(" Error Validating Apple Pay " + statusCode);

}

} catch (ClientProtocolException e) {

System.out.println("ClientProtocolException : " + e);

} catch (IOException e) {

System.out.println("IOException : " + e);

} finally {

if(request != null) {

System.out.println("Releaseing Connections");

request.releaseConnection();

}

}

}