Node.Js Tutorial Development Tutorials, Guides & Insights

// redisClient.js
const redis = require("redis");

const client = redis.createClient({ url: process.env.REDIS_URL });

client.on("error", (err) => console.error("Redis error:", err));
client.connect();

module.exports = client;

// rateLimiter.js
const client = require("./redisClient");

const rateLimiter = (limit = 100, windowSec = 3600) => {
  return async (req, res, next) => {
    const ip = req.ip;
    const key = `rate_limit:${ip}`;

    const current = await client.get(key);

    if (current !== null && parseInt(current) >= limit) {
      return res.status(429).json({ error: "Too many requests. Try later." });
    }

    const multi = client.multi();
    multi.incr(key);
    if (!current) {
      multi.expire(key, windowSec);
    }
    await multi.exec();

    next();
  };
};

module.exports = rateLimiter;

• Run the downloaded installer and follow the installation prompts.
• Ensure that npm (Node Package Manager) is installed alongside Node.js (it usually is).

• Open your terminal (Command Prompt, PowerShell, or any terminal on macOS/Linux).
• Check the Node.js version:

Key Takeaways:

• Simplicity: SQLite's serverless architecture simplifies database management.
• Efficiency: sqlite3 provides a robust API to perform complex SQL operations seamlessly.
• Security: Always prioritize the security of your data by following best practices.

   npm install

Updating Node.js and npm is an essential task for keeping your development environment up to date. Following this tutorial ensures that you’re running the latest, most secure, and feature-rich versions of Node.js and npm.