code-boxx/0-NODE-PUSH.MD

## 0-NODE-PUSH.MD

      
    Raw
  

              0-NODE-PUSH.MD
            
          
    NODEJS PUSH NOTIFICATIONS

https://code-boxx.com/push-notifications-nodejs/
NOTES


Run unpack.bat (Windows) unpack.sh (Linux/Mac). This will automatically:

Save the images below as i-banner.png and i-ico.png.
Install the required modules npm i express body-parser web-push
Generate the VAPID keys - node 1-vapid-keys.js


Copy the public key into 2-perm-sw.html - const publicKey.
Copy both keys into 4-server.js - publicKey privateKey. Also change mail to your own.
Run node 4-server.js, access http://localhost.

IMAGES


LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## 1-vapid-keys.js
const vapidKeys = require("web-push").generateVAPIDKeys();
console.log(vapidKeys);

## 2-perm-sw.html
<!DOCTYPE html>
<html>
  <head>
    <title>Push Notification</title>
    <meta charset="utf-8">
  </head>
  <body>
    <script>
    // (A) OBTAIN USER PERMISSION TO SHOW NOTIFICATION
    window.onload = () => {
      // (A1) ASK FOR PERMISSION
      if (Notification.permission === "default") {
        Notification.requestPermission().then(perm => {
          if (Notification.permission === "granted") {
            regWorker().catch(err => console.error(err));
          } else {
            alert("Please allow notifications.");
          }
        });
      }

      // (A2) GRANTED
      else if (Notification.permission === "granted") {
        regWorker().catch(err => console.error(err));
      }

      // (A3) DENIED
      else { alert("Please allow notifications."); }
    }

    // (B) REGISTER SERVICE WORKER
    async function regWorker () {
      // (B1) YOUR PUBLIC KEY - CHANGE TO YOUR OWN!
      const publicKey = "YOUR-PUBLIC-KEY";

      // (B2) REGISTER SERVICE WORKER
      navigator.serviceWorker.register("3-sw.js", { scope: "/" });

      // (B3) SUBSCRIBE TO PUSH SERVER
      navigator.serviceWorker.ready
      .then(reg => {
        reg.pushManager.subscribe({
          userVisibleOnly: true,
          applicationServerKey: publicKey
        }).then(
          // (B3-1) OK - TEST PUSH NOTIFICATION
          sub => {
            fetch("/mypush", {
              method: "POST",
              body: JSON.stringify(sub),
              headers: { "content-type": "application/json" }
            })
            .then(res => res.text())
            .then(txt => console.log(txt))
            .catch(err => console.error(err));
          },

          // (B3-2) ERROR!
          err => console.error(err)
        );
      });
    }
    </script>
  </body>
</html>

## 3-sw.js
// (A) INSTANT WORKER ACTIVATION
self.addEventListener("install", evt => self.skipWaiting());

// (B) CLAIM CONTROL INSTANTLY
self.addEventListener("activate", evt => self.clients.claim());

// (C) LISTEN TO PUSH
self.addEventListener("push", evt => {
  const data = evt.data.json();
  // console.log("Push", data);
  self.registration.showNotification(data.title, {
    body: data.body,
    icon: data.icon,
    image: data.image
  });
});

## 4-server.js
// (A) SETTINGS - CHANGE TO YOUR OWN!
const port = 80,
      mail = "your@email.com",
      publicKey = "YOUR-PUBLIC-KEY",
      privateKey = "YOUR-PRIVATE-KEY";

// (B) LOAD MODULES
const express = require("express"),
      bodyParser = require("body-parser"),
      path = require("path"),
      webpush = require("web-push");

// (C) HTTP SETUP SERVER
webpush.setVapidDetails("mailto:" + mail, publicKey, privateKey);
const app = express();
app.use(express.static(__dirname)); // serve static files
app.use(bodyParser.json()); // json parser

// (D) SERVE TEST HOME PAGE
app.get("/", (req, res) => res.sendFile(path.join(__dirname, "/2-perm-sw.html")));

// (E) SEND TEST PUSH NOTIFICATION
app.post("/mypush", (req, res) => {
  res.status(201).json({}); // reply with 201 (created)
  webpush.sendNotification(req.body, JSON.stringify({
    title: "Welcome!",
    body: "Yes, it works!",
    icon: "i-ico.png",
    image: "i-banner.png"
  }))
  .catch(err => console.log(err));
});

// (F) START!
app.listen(port, () => console.log(`Server deployed at ${port}`));

## unpack.bat
curl https://user-images.githubusercontent.com/11156244/281611056-7b0290bf-eda2-4819-aa92-47777c460d2c.png --ssl-no-revoke --output i-banner.png
curl https://user-images.githubusercontent.com/11156244/281611063-1bf72129-967a-4320-a757-f0ecf5c7b0ac.png --ssl-no-revoke --output i-ico.png
call npm i express body-parser web-push
node 1-vapid-keys.js

## unpack.sh
curl https://user-images.githubusercontent.com/11156244/281611056-7b0290bf-eda2-4819-aa92-47777c460d2c.png --ssl-no-revoke --output ./i-banner.png
curl https://user-images.githubusercontent.com/11156244/281611063-1bf72129-967a-4320-a757-f0ecf5c7b0ac.png --ssl-no-revoke --output ./i-ico.png
source "npm i express body-parser web-push"
node ./1-vapid-keys.js
	const vapidKeys = require("web-push").generateVAPIDKeys();
	console.log(vapidKeys);
	<!DOCTYPE html>
	<html>
	<head>
	<title>Push Notification</title>
	<meta charset="utf-8">
	</head>
	<body>
	<script>
	// (A) OBTAIN USER PERMISSION TO SHOW NOTIFICATION
	window.onload = () => {
	// (A1) ASK FOR PERMISSION
	if (Notification.permission === "default") {
	Notification.requestPermission().then(perm => {
	if (Notification.permission === "granted") {
	regWorker().catch(err => console.error(err));
	} else {
	alert("Please allow notifications.");
	}
	});
	}

	// (A2) GRANTED
	else if (Notification.permission === "granted") {
	regWorker().catch(err => console.error(err));
	}

	// (A3) DENIED
	else { alert("Please allow notifications."); }
	}

	// (B) REGISTER SERVICE WORKER
	async function regWorker () {
	// (B1) YOUR PUBLIC KEY - CHANGE TO YOUR OWN!
	const publicKey = "YOUR-PUBLIC-KEY";

	// (B2) REGISTER SERVICE WORKER
	navigator.serviceWorker.register("3-sw.js", { scope: "/" });

	// (B3) SUBSCRIBE TO PUSH SERVER
	navigator.serviceWorker.ready
	.then(reg => {
	reg.pushManager.subscribe({
	userVisibleOnly: true,
	applicationServerKey: publicKey
	}).then(
	// (B3-1) OK - TEST PUSH NOTIFICATION
	sub => {
	fetch("/mypush", {
	method: "POST",
	body: JSON.stringify(sub),
	headers: { "content-type": "application/json" }
	})
	.then(res => res.text())
	.then(txt => console.log(txt))
	.catch(err => console.error(err));
	},

	// (B3-2) ERROR!
	err => console.error(err)
	);
	});
	}
	</script>
	</body>
	</html>
	// (A) INSTANT WORKER ACTIVATION
	self.addEventListener("install", evt => self.skipWaiting());

	// (B) CLAIM CONTROL INSTANTLY
	self.addEventListener("activate", evt => self.clients.claim());

	// (C) LISTEN TO PUSH
	self.addEventListener("push", evt => {
	const data = evt.data.json();
	// console.log("Push", data);
	self.registration.showNotification(data.title, {
	body: data.body,
	icon: data.icon,
	image: data.image
	});
	});
	// (A) SETTINGS - CHANGE TO YOUR OWN!
	const port = 80,
	mail = "your@email.com",
	publicKey = "YOUR-PUBLIC-KEY",
	privateKey = "YOUR-PRIVATE-KEY";

	// (B) LOAD MODULES
	const express = require("express"),
	bodyParser = require("body-parser"),
	path = require("path"),
	webpush = require("web-push");

	// (C) HTTP SETUP SERVER
	webpush.setVapidDetails("mailto:" + mail, publicKey, privateKey);
	const app = express();
	app.use(express.static(__dirname)); // serve static files
	app.use(bodyParser.json()); // json parser

	// (D) SERVE TEST HOME PAGE
	app.get("/", (req, res) => res.sendFile(path.join(__dirname, "/2-perm-sw.html")));

	// (E) SEND TEST PUSH NOTIFICATION
	app.post("/mypush", (req, res) => {
	res.status(201).json({}); // reply with 201 (created)
	webpush.sendNotification(req.body, JSON.stringify({
	title: "Welcome!",
	body: "Yes, it works!",
	icon: "i-ico.png",
	image: "i-banner.png"
	}))
	.catch(err => console.log(err));
	});

	// (F) START!
	app.listen(port, () => console.log(`Server deployed at ${port}`));
	curl https://user-images.githubusercontent.com/11156244/281611056-7b0290bf-eda2-4819-aa92-47777c460d2c.png --ssl-no-revoke --output i-banner.png
	curl https://user-images.githubusercontent.com/11156244/281611063-1bf72129-967a-4320-a757-f0ecf5c7b0ac.png --ssl-no-revoke --output i-ico.png
	call npm i express body-parser web-push
	node 1-vapid-keys.js
	curl https://user-images.githubusercontent.com/11156244/281611056-7b0290bf-eda2-4819-aa92-47777c460d2c.png --ssl-no-revoke --output ./i-banner.png
	curl https://user-images.githubusercontent.com/11156244/281611063-1bf72129-967a-4320-a757-f0ecf5c7b0ac.png --ssl-no-revoke --output ./i-ico.png
	source "npm i express body-parser web-push"
	node ./1-vapid-keys.js