rosterchirp/fcm-app

FCM Test PWA

A Progressive Web App for testing Firebase Cloud Messaging (FCM) notifications across desktop and mobile devices.

Features

• PWA with install capability
• Firebase Cloud Messaging integration
• Multi-user support (pwau1, pwau2, pwau3)
• SSL/HTTPS ready
• Docker deployment
• Real-time notifications

Quick Start

1. Firebase Setup

1. Create Firebase Project

   • Go to Firebase Console
   • Click "Add project"
   • Enter project name (e.g., "fcm-test-pwa")
   • Enable Google Analytics (optional)
   • Click "Create project"

2. Enable Cloud Messaging

   • In your project dashboard, go to "Build" → "Cloud Messaging"
   • Click "Get started"
   • Cloud Messaging is now enabled for your project

3. Get Firebase Configuration

   • Go to Project Settings (⚙️ icon)
   • Under "Your apps", click "Web app" (</> icon)
   • Register app with nickname "FCM Test PWA"
   • Copy the Firebase config object (you'll need this later)

4. Generate Service Account Key

   • In Project Settings, go to "Service accounts"
   • Click "Generate new private key"
   • Save the JSON file (you'll need this for the server)

5. Get Web Push Certificate

   • In Cloud Messaging settings, click "Web Push certificates"
   • Generate and save the key pair

2. Server Configuration

1. Copy environment template

   cp .env.example .env
   

2. Update .env file with your Firebase credentials:

   FIREBASE_PROJECT_ID=your-project-id
   FIREBASE_PRIVATE_KEY_ID=your-private-key-id
   FIREBASE_PRIVATE_KEY="-----BEGIN PRIVATE KEY-----\n...\n-----END PRIVATE KEY-----\n"
   FIREBASE_CLIENT_EMAIL=firebase-adminsdk-...@your-project-id.iam.gserviceaccount.com
   FIREBASE_CLIENT_ID=your-client-id
   # ... other fields from service account JSON
   

3. Update Firebase config in client files:

   • Edit public/app.js - replace Firebase config
   • Edit public/sw.js - replace Firebase config

3. Local Development

# Install dependencies
npm install

# Start development server
npm run dev

Open http://localhost:3000 in your browser.

4. Docker Deployment

# Build and run with Docker Compose
docker-compose up -d

# View logs
docker-compose logs -f

User Accounts

Username	Password	Purpose
pwau1	test123	Desktop user
pwau2	test123	Mobile user 1
pwau3	test123	Mobile user 2

Usage

1. Install as PWA

   • Open the app in Chrome/Firefox
   • Click the install icon in the address bar
   • Install as a desktop app

2. Enable Notifications

   • Login with any user account
   • Grant notification permissions when prompted
   • FCM token will be automatically registered

3. Send Notifications

   • Click "Send Notification" button
   • All other logged-in users will receive the notification
   • Check both desktop and mobile devices

Deployment on Ubuntu LXC + HAProxy

Prerequisites

# Update system
sudo apt update && sudo apt upgrade -y

# Install Docker
curl -fsSL https://get.docker.com -o get-docker.sh
sudo sh get-docker.sh
sudo usermod -aG docker $USER

# Install Docker Compose
sudo curl -L "https://github.com/docker/compose/releases/latest/download/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

SSL Certificate Setup

# Create SSL directory
mkdir -p ssl

# Generate self-signed certificate (for testing)
openssl req -x509 -nodes -days 365 -newkey rsa:2048 \
  -keyout ssl/key.pem \
  -out ssl/cert.pem \
  -subj "/C=US/ST=State/L=City/O=Organization/CN=your-domain.com"

# OR use Let's Encrypt for production
sudo apt install certbot
sudo certbot certonly --standalone -d your-domain.com
sudo cp /etc/letsencrypt/live/your-domain.com/fullchain.pem ssl/cert.pem
sudo cp /etc/letsencrypt/live/your-domain.com/privkey.pem ssl/key.pem

HAProxy Configuration

Add to your /etc/haproxy/haproxy.cfg:

frontend fcm_test_frontend
    bind *:80
    bind *:443 ssl crt /etc/ssl/certs/your-cert.pem
    redirect scheme https if !{ ssl_fc }
    default_backend fcm_test_backend

backend fcm_test_backend
    balance roundrobin
    server fcm_test 127.0.0.1:3000 check

Deploy

# Clone and setup
git clone <your-repo>
cd fcm-test-pwa
cp .env.example .env
# Edit .env with your Firebase config

# Deploy
docker-compose up -d

# Check status
docker-compose ps
docker-compose logs

Testing

1. Desktop Testing

   • Open app in Chrome
   • Install as PWA
   • Login as pwau1
   • Send test notifications

2. Mobile Testing

   • Open app on mobile browsers
   • Install as PWA
   • Login as pwau2 and pwau3 on different devices
   • Test cross-device notifications

Troubleshooting

• Notifications not working: Check Firebase configuration and service worker
• PWA not installing: Ensure site is served over HTTPS
• Docker issues: Check logs with docker-compose logs
• HAProxy issues: Verify SSL certificates and backend connectivity

Security Notes

• Change default passwords in production
• Use proper SSL certificates
• Implement rate limiting for notifications
• Consider using a database for token storage in production