What projects have you implemented using microframeworks?

Used Microframework Boilerplate (express-boilerplate) for building microservices.

Examples of implementations:

1. Authentication and Authorization Service:

   • Implementation of JWT authentication.
   • API for user registration and login.
   • Middleware for access rights verification by roles.
   • Libraries used: jsonwebtoken, bcrypt, passport.

   // Example of authorization middleware
   const express = require('express');
   const jwt = require('jsonwebtoken');
   
   const authenticateJWT = (req, res, next) => {
       const authHeader = req.headers.authorization;
       if (authHeader) {
           const token = authHeader.split(' ')[1];
           jwt.verify(token, process.env.JWT_SECRET, (err, user) => {
               if (err) {
                   return res.sendStatus(403); // Forbidden
               }
               req.user = user;
               next();
           });
       } else {
           res.sendStatus(401); // Unauthorized
       }
   };
   
   // Usage example
   // router.get('/protected', authenticateJWT, (req, res) => { ... });
   

2. Order Processing Service:

   • API for creating, viewing, and updating orders.
   • Interaction with other microservices (product catalog, payment).
   • Handling asynchronous operations (e.g., sending notifications).
   • Libraries used: axios for HTTP requests to other services, amqplib for RabbitMQ.

3. Notification Service:

   • Implementation of sending emails, SMS, push notifications.
   • Message queues for background task processing.
   • Libraries used: nodemailer, twilio, firebase-admin.

Main advantages of using a microframework in these projects:

• Fast start: Ready project structure and basic tools (routing, request handling).
• Modularity: Easy to add and remove functionality.
• Lightweight: Absence of unnecessary features not needed for a specific service.
• Flexibility: Ability to choose and integrate necessary libraries.