lteacher

const _ = require('lodash');
const Busboy = require('busboy');

const getContentType = (event) => {
  // Serverless offline is passing 'Content-Type', AWS is passing 'content-type'
  let contentType = _.get(event, 'headers.content-type');
  if (!contentType) contentType = _.get(event, 'headers.Content-Type');

  return contentType;
};

katowulf

// assumes you add a timestamp field to each record (see Firebase.ServerValue.TIMESTAMP)
// pros: fast and done server-side (less bandwidth, faster response), simple
// cons: a few bytes on each record for the timestamp
var ref = new Firebase(...);
ref.orderByChild('timestamp').startAt(Date.now()).on('child_added', function(snapshot) {
  console.log('new record', snap.key());
});