In this part we will understand how to send notification from NodeJs server.
If you want to integrate with react then, check out here
Lets create a node server first.
I am guessing npm and node is already installed if not then Install using nvm
Initialize a NPM Project
npm init -y Install dependencies
npm i express firebase-admin Now lets generate a firebase private key for admin
Firebase Admin SDK private key
- Open firebase console
- Select the project (Use same if you are following from previous chapter, FCM with React)
- Open a project settings
- Go to service accounts
- Generate a new Key pair
This action will download a JSON file.
Rename the file google-cloud-service-account.json for simplicity
Create a file app.js (Make sure you update entry point in package.json)
touch app.js const http = require("http"); const express = require("express"); const queue = require("./services/queue"); const app = express(); const admin = require("firebase-admin"); const serviceAccount = require("./config/google-cloud-service-account.json"); // Make sure to provide a correct path admin.initializeApp({ credential: admin.credential.cert(serviceAccount), }); const router = express.Router(); router.get("/", (req, res) => { res.send("Hello World"); }); app.use(router); const server = http.createServer(app); server.on("request", (req, res) => { console.log("Request received"); }); // We are not mentioning the host name here, so it will listen on all the available network interfaces server.listen(3000, () => { console.log("Server is running on " + JSON.stringify(server.address().port)); }); This creates a server using express and http
Note - We have not used app.listen to create server instead http.createServer() to achieve more flexibility
Create a route to send notification
create user.routes.js
touch user.routes.js Add this code
const express = require("express"); const messaging = require("../services/firebase"); const router = express.Router(); router.get("/user-action", (req, res) => { // User request comes for specific action //Once the action is performed, we can send the notification to the user // Here we are sending a notification to the specif this user with mentioned token const registrationToken = "REGISTRATION_TOKEN"; const data = { title: "Hello from the server", body: "This is a test notification", }; const message = { notification: { title: data.title, body: data.body, }, token: registrationToken, }; messaging .send(message) .then((response) => { console.log("Successfully sent message:", response); res.send("Notification sent"); }) .catch((error) => { console.log("Error sending message:", error); res.send("Error sending notification"); }); // res.send("Send notifications"); }); module.exports = router; Update your app.js
const http = require("http"); const express = require("express"); const app = express(); const userRoutes = require("./user.routes"); const router = express.Router(); router.get("/", (req, res) => { res.send("Hello World"); }); app.use(router); app.use("/users", userRoutes); const server = http.createServer(app); server.on("request", (req, res) => { console.log("Request received"); }); // We are not mentioning the host name here, so it will listen on all the available network interfaces server.listen(3000, () => { console.log("Server is running on " + JSON.stringify(server.address().port)); }); Now lets add Registration Token of the client device
Create a device token
Follow these instruction to create a device token.
Replace the token with REGISTRATION_TOKEN in user.routes.js
Restart your server
Visit the url
http://localhost:3000/users/user-action and you will receive a notification at the client device.
You can find the entire working code here
Happy Coding
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