lambda-s3-trigger.js - to be triggered off an S3 CRED action like create. Set env var HOSTNAME to the hostname of where you want to send the file's metadata when action occurs.

lambda-s3-trigger.js

const hostname = process.env.HOSTNAME

const https = require('https')

exports.handler = (event, context, callback) => {
    
  const data = JSON.stringify({ records: event.Records })
		
	const opts = {
    
		hostname,
		method: 'POST',
		path: '/aws-door',
		headers: {
			'Content-Type': 'application/json',
			'Content-Length': Buffer.byteLength(data)
		}
	}
	
	const req = https.request(opts, (res) => {
		
		console.log(`statusCode: ${res.statusCode}`)
		
		res.on('data', (d) => {
			process.stdout.write(d)
		})
	})
	
	req.on('error', console.log)
  
	req.write(data)
	req.end()
}