Nodejs Programming Tutorials, Guides & Best Practices

When developing web apps or APIs, it’s critical to prevent users from overwhelming your server. That’s where rate limiting comes in. In this guide, we’ll build a custom rate limiter in Node.js using Redis—no libraries, no magic, just code you control and understand.

• How to use Redis to count and throttle requests
• How to implement reusable middleware in Express
• How to rate limit by IP or API key
• Why this method is better for learning and customization

// Close the database connection
db.close((err) => {
  if (err) {
    console.error('Error closing the database connection:', err.message);
  } else {
    console.log('Database connection closed.');
  }
});

• db.close(): Closes the database connection.
• The callback logs whether the closure was successful or if an error occurred.

curl -fsSL https://deb.nodesource.com/setup_18.x | sudo -E bash -

For Node.js 20 (latest version):