Authentication & Authorization

JWT Authentication

1. Login Flow

   • User authenticates through external auth service
   • Receives JWT token
   • Token contains: user_id, username, store_id (if applicable)

2. Token Usage

   // Token verification in middleware
   const token = req.headers.authorization?.split(' ')[1];
   const decoded = jwt.verify(token, process.env.JWT_SECRET);
   

3. Token Refresh

   • Implement token refresh logic in auth service
   • Tokens typically expire after 24 hours

Passport Strategies

Basic HTTP authentication for admin/internal endpoints:

// In middleware/passport.js
passport.use(new BasicStrategy(
  function(username, password, done) {
    // Validate credentials
  }
));

Authorization Levels

1. Public - No authentication required
2. Authenticated User - Requires valid JWT
3. Store Owner - Requires JWT with store_id
4. Admin - Requires Basic Auth or special admin JWT
5. Affiliate - Requires JWT with affiliate permissions

Middleware Chain Example

app.post(
  '/product/add',
  verifyCross,           // Verify JWT token
  getStoreID,            // Extract store ID
  validator.validate(),  // Validate request
  productController.addProduct
);