Node.js PayUMoney Integration - response.headers.location is undefined - node.js

Question

Tried 2 Node.js packages:
https://www.npmjs.com/package/payumoney_nodejs
https://www.npmjs.com/package/payumoney-node
Debugging on localhost.
Debugged in the index.js file under the node_modules in each package.
params {
key: 'x1FanfbP',
salt: 'Vs2GrDyaMQ',
service_provider: 'payu_paisa',
hash: '65f75ced566e2d76dbc6153a277c25f591fc3c0a00a8f51a0699f609d5cbbc94dc7acd5d3be5fe0c0a855c4c6dc7faef49d8b6a1d77dd09398058f800bab068d',
firstname: '',
lastname: '',
email: 'xxxxxxxx#xxxxx.xxx',
phone: XXXXXXXXXX,
amount: '100',
productinfo: '',
txnid: '5b51d253-5d6e-4512-951a-cd6d05bf9e6b',
surl: 'http://localhost:3000/member/contribution/success',
furl: 'http://localhost:3000/member/contribution/failure'
}
request.post(this.payUmoneyURL, form: params, headers: this.headers },
function(error, response, body) {
if (!error) {
var result = response.headers.location;
callback(error, result);
}
});
request.post(payment_url[this.mode] + API.makePayment, { form: params, headers: this.headers }, function(error, response, body) {
if (!error) {
var result = response.headers.location;
callback(error, result);
}
});
Response of response.headers:
response.headers {
date: 'Fri, 28 Jun 2019 12:06:35 GMT',
server: 'Apache',
'x-powered-by': 'PHP/7.2.14',
p3p: 'CP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT"',
'set-cookie': [ 'PHPSESSID=naopga57qf58vl0hdfj5krq4n5; path=/; domain=.payu.in' ],
expires: 'Thu, 19 Nov 1981 08:52:00 GMT',
'cache-control': 'no-store, no-cache, must-revalidate',
pragma: 'no-cache',
vary: 'Accept-Encoding',
'content-length': '3129',
connection: 'close',
'content-type': 'text/html; charset=UTF-8'
}
The above does not have location key like response.headers.location
Can someone help to know why location is not returned?
Is it because of development on local machine? If yes, then how to test it on localhost?
Any help is appreciated.

Answer 1

It seems like a very silly mistake made but didn't know the area as where to look for the error in the response key before.
After going through the entire response object found that there is a body key sent at the very end of the response object which has HTML string. This HTML specifies if any error has occurred and what exactly it is.
In my case it were the missing mandatory fields:
Error Reason
One or more mandatory parameters are missing in the transaction request.
Corrective Action
Please ensure that you send all mandatory parameters in the transaction request to PayU.
Mandatory parameters which must be sent in the transaction are:
key, txnid, amount, productinfo, firstname, email, phone, surl, furl, hash.
The parameters which you have actually sent in the transaction are:
key, txnid, amount, surl, hash, email, phone.
Mandatory parameter missing from your transaction request are:
productinfo, firstname.
Please re-initiate the transaction with all the mandatory parameters.
After passing data for the missing parameters, received the url in the response.headers.location key as expected.
Integration is working as expected now.