Amazon Lambda to Firebase

Question

I get 'Cannot find module 'firebase' when I try to run this in Lambda (Node.js 4.3)

var Firebase = require('firebase');

Same thing happens when I try to upload a zipped package that includes node_modules/firebase

Does anybody have a working 'write from lambda to firebase' implementation?

Answer 1

To safely use firebase npm package (version 3.3.0) in AWS Lambda (Nodejs 4.3), Please do the following:

'use strict';

var firebase = require("firebase");

exports.handler = (event, context, callback) => {
    context.callbackWaitsForEmptyEventLoop = false;  //<---Important

    var config = {
        apiKey: "<<apikey>>",
        authDomain: "<<app_id>>.firebaseapp.com",
        databaseURL: "https://<<app_id>>.firebaseio.com",
        storageBucket: "<<app_id>>.appspot.com",
    };

    if(firebase.apps.length == 0) {   // <---Important!!! In lambda, it will cause double initialization.
        firebase.initializeApp(config);
    }

    ...
    <Your Logic here...>
    ...
};

Answer 2

I solved my problem by using firebase REST api

var https = require('https');

exports.handler = function(event, context, callback) {

    var body = JSON.stringify({
        foo: "bar"
    })

   var https = require('https');

var options = {
  host: 'project-XXXXX.firebaseio.com',
  port: 443,
  path: '/.json',
  method: 'POST'
};

var req = https.request(options, function(res) {
  console.log(res.statusCode);
  res.on('data', function(d) {
    process.stdout.write(d);
  });
});
req.end(body);

req.on('error', function(e) {
  console.error(e);
});

    callback(null, "some success message");

}