danielflippance/paypalIPNVerify.js

## paypalIPNVerify.js
'use strict';

const SANDBOX_VERIFY_HOSTNAME = 'ipnpb.sandbox.paypal.com';

var qs = require('querystring');
var https = require('https');

//========================================================
// PayPalIPNGateway
//  Gateway for the PayPal IPN messages
//========================================================
module.exports = class PayPalIPNGateway {

	constructor() {
	}

	//========================================================
	// verify
	//  https://github.com/paypal/ipn-code-samples/blob/master/javascript/googlecloudfunctions.js
	//========================================================
	verify(ipnTransactionMessage, mode, callback) {
		console.log('+ PayPalIPNGateway.verify');
		console.log('++ ipnTransactionMessage: ' + JSON.stringify(ipnTransactionMessage, null, 4));
		console.log('++ mode: %s', mode);
		const host = SANDBOX_VERIFY_HOSTNAME;
		console.log('++ host: %s', host);
		var self = this;

		//Get the transaction message
		// JSON object of the IPN message consisting of transaction details.
		// Convert JSON ipn data to a query string since Google Cloud Function does not expose raw request data.
		let formUrlEncodedBody = qs.stringify(ipnTransactionMessage);

		// Build the body of the verification post message by prefixing 'cmd=_notify-validate'.
		let verificationBody = `cmd=_notify-validate&${formUrlEncodedBody}`;

		console.log(`++ verificationBody: ${verificationBody}`);

		let options = {
			method: 'POST',
			port: 443,
			uri: 'https://' + host + '/cgi-bin/webscr',
			body: verificationBody,
		};

		console.log('++ options: ' + JSON.stringify(options, null, 4));

		// POST verification IPN data to paypal to validate.
		var request = https.request(options, function(response) {
			console.log('++ response: ' + JSON.stringify(response, null, 4));
			console.log('++ response.headers: ' + JSON.stringify(response.headers, null, 4));
			console.log('++ response.statusMessage: ' + JSON.stringify(response.statusMessage, null, 4));
			console.log('++ response.statusCode: ' + JSON.stringify(response.statusCode, null, 4));

			var responseBody = '';
			console.log(options.host + ':' + response.statusCode);
			response.setEncoding('utf8');

			response.on('data', function (chunk) {
				console.log('++ chunk');
				responseBody += chunk;

			}).on('end', function() {
				console.log('++ end');
				console.log('++ response.statusCode: %s', response.statusCode);
				console.log('++ responseBody: %s', responseBody);
			});
		});

		request.on('error', function(err) {
			console.log('++ M17 paypal err: ' + err);
			console.log('++ err: ' + JSON.stringify(err, null, 4));
			callback('paypal error');
		});

		request.end();
	}
}
	'use strict';

	const SANDBOX_VERIFY_HOSTNAME = 'ipnpb.sandbox.paypal.com';

	var qs = require('querystring');
	var https = require('https');

	//========================================================
	// PayPalIPNGateway
	// Gateway for the PayPal IPN messages
	//========================================================
	module.exports = class PayPalIPNGateway {

	constructor() {
	}

	//========================================================
	// verify
	// https://github.com/paypal/ipn-code-samples/blob/master/javascript/googlecloudfunctions.js
	//========================================================
	verify(ipnTransactionMessage, mode, callback) {
	console.log('+ PayPalIPNGateway.verify');
	console.log('++ ipnTransactionMessage: ' + JSON.stringify(ipnTransactionMessage, null, 4));
	console.log('++ mode: %s', mode);
	const host = SANDBOX_VERIFY_HOSTNAME;
	console.log('++ host: %s', host);
	var self = this;

	//Get the transaction message
	// JSON object of the IPN message consisting of transaction details.
	// Convert JSON ipn data to a query string since Google Cloud Function does not expose raw request data.
	let formUrlEncodedBody = qs.stringify(ipnTransactionMessage);

	// Build the body of the verification post message by prefixing 'cmd=_notify-validate'.
	let verificationBody = `cmd=_notify-validate&${formUrlEncodedBody}`;

	console.log(`++ verificationBody: ${verificationBody}`);

	let options = {
	method: 'POST',
	port: 443,
	uri: 'https://' + host + '/cgi-bin/webscr',
	body: verificationBody,
	};

	console.log('++ options: ' + JSON.stringify(options, null, 4));

	// POST verification IPN data to paypal to validate.
	var request = https.request(options, function(response) {
	console.log('++ response: ' + JSON.stringify(response, null, 4));
	console.log('++ response.headers: ' + JSON.stringify(response.headers, null, 4));
	console.log('++ response.statusMessage: ' + JSON.stringify(response.statusMessage, null, 4));
	console.log('++ response.statusCode: ' + JSON.stringify(response.statusCode, null, 4));

	var responseBody = '';
	console.log(options.host + ':' + response.statusCode);
	response.setEncoding('utf8');

	response.on('data', function (chunk) {
	console.log('++ chunk');
	responseBody += chunk;

	}).on('end', function() {
	console.log('++ end');
	console.log('++ response.statusCode: %s', response.statusCode);
	console.log('++ responseBody: %s', responseBody);
	});
	});

	request.on('error', function(err) {
	console.log('++ M17 paypal err: ' + err);
	console.log('++ err: ' + JSON.stringify(err, null, 4));
	callback('paypal error');
	});

	request.end();
	}
	}