validate captcha and show data for google cloud functions with node

showdata.js

const https = require('https')
const querystring = require('querystring')

exports.showdata = (req, res) => {
	const data = '___________________'
	const captchaSecret = '________________________________'
	const allowedOrigins = ['______________________________']

	const verifyData = querystring.stringify({
		secret   : captchaSecret,
		response : req.query.response || req.body.response,
		remoteip : req.ip
	})

	const verifyReq = https.request({
		hostname: 'www.google.com',
		path: '/recaptcha/api/siteverify',
		method: 'POST',
		headers: {
			'Content-Type': 'application/x-www-form-urlencoded',
			'Content-Length': Buffer.byteLength(verifyData)
		}
	}, verifyRes => {
		let responseData = ''
		verifyRes.on('data', d => {
			responseData += d
		})
		verifyRes.on('end', () => {
			let response = JSON.parse(responseData)
			console.log(response);
			if (!response.success) {
				res.status(401).send('unauthorized')
			} else {
				res.status(200).send(data)
			}
		})
	})

	verifyReq.on('error', (error) => {
		console.error(error)
		res.status(401).send('unauthorized')
	})

	verifyReq.write(verifyData)
	verifyReq.end()
	
	if (allowedOrigins.indexOf(req.get('origin')) >= 0) {
		res.header('Access-Control-Allow-Origin', '*')
	}
}