Cloud Functions by Firebase
https://firebase.google.com/docs/functions
- Support Node.js only
- Good support for local machine testing using Firebase emulators (Cloud Functions, Cloud Firestore, Cloud Authentication, etc)
Simple HTTP function
const functions = require('firebase-functions');exports.hello = functions.https.onRequest((req, res) => { res.send(`Hello ${req.query.name}`);});Deploy
firebase deploy --only functions:helloFunctions triggered by Google Authentication (when new user is created)
const functions = require('firebase-functions');const admin = require('firebase-admin');admin.initializeApp();const db = admin.firestore();exports.initUser = functions.auth.user().onCreate(async (user) => { let docRef = db.collection('user').doc(user.uid); await docRef.set({ created: admin.firestore.Timestamp.now(), // user.metadata.createdAt name: user.displayName, email: user.email });});firebase deploy --only functions:initUserCloud Functions
https://cloud.google.com/functions
- Support Node.js, Python, Go, Java, .NET
Simple HTTP function
exports.hello = (req, res) => { res.send(`Hello ${req.query.name}`);};Deploy
gcloud functions deploy hello --runtime nodejs10 --trigger-http --allow-unauthenticatedFunctions triggered by Google Authentication (when new user is created)
const functions = require('firebase-functions');const admin = require('firebase-admin');admin.initializeApp();const db = admin.firestore();exports.initUser = async (event) => { let docRef = db.collection('user').doc(event.uid); await docRef.set({ created: admin.firestore.Timestamp.now(), // event.metadata.createdAt name: event.displayName, email: event.email });};Deploy
gcloud functions deploy initUser --trigger-event providers/firebase.auth/eventTypes/user.create --runtime nodejs10