Node.js handle uncaught exceptions

Node.js handle uncaught exceptions Node.js handle uncaught exceptions Node.js handle uncaught exceptions

const express = require('express');

const app = express();

// Middleware to parse JSON requests

app.use(express.json());

// A sample route

app.get('/', (req, res) => {

    res.send('Welcome to the Express.js app!');

});

// An example of a route with a potential error

app.get('/error', (req, res) => {

    throw new Error('This is an uncaught exception!');

});

// Global error handling middleware

app.use((err, req, res, next) => {

    console.error('Error caught by middleware:', err.message);

    res.status(500).json({ message: 'Internal Server Error' });

});

// Start the server

const PORT = 3000;

const server = app.listen(PORT, () => {

    console.log(`Server is running on http://localhost:${PORT}`);

});

// Handle uncaught exceptions

process.on('uncaughtException', (err) => {

    console.error('Uncaught Exception:', err.message);

    console.error(err.stack);

    // Perform cleanup if necessary, then exit

    server.close(() => {

        console.log('Server closed due to uncaught exception');

        process.exit(1); // Exit with a failure code

    });

});

// Handle unhandled promise rejections

process.on('unhandledRejection', (reason, promise) => {

    console.error('Unhandled Rejection at:', promise, 'reason:', reason);

    // Perform cleanup if necessary

    server.close(() => {

        console.log('Server closed due to unhandled rejection');

        process.exit(1); // Exit with a failure code

    });

});