Introduction to cookie-session

In the modern web development landscape, managing user sessions effectively is crucial. The cookie-session module is a powerful tool for managing sessions in web applications using cookies. This guide will walk you through the details of the cookie-session module and provide examples of its useful APIs.

Getting Started

  const express = require('express');
  const cookieSession = require('cookie-session');
  
  const app = express();
  
  app.use(cookieSession({
    name: 'session',
    keys: ['key1', 'key2'],
    
    // Cookie Options
    maxAge: 24 * 60 * 60 * 1000 // 24 hours
  }));
  
  app.get('/', (req, res) => {
    req.session.views = (req.session.views || 0) + 1;
    res.send(`Views: ${req.session.views}`);
  });
  
  app.listen(3000, () => {
    console.log('Server is running on port 3000');
  });

Configuration Options

The cookie-session module provides a range of configuration options:

• name: The name of the cookie.
• keys: Keys used for signing and verifying cookies.
• maxAge: Specifies the expiration time of the cookie in milliseconds.
• path: Specifies the path for which the cookie is valid.
• httpOnly: Specifies whether the cookie is accessible only by the web server.

Using Multiple Configuration Options

  app.use(cookieSession({
    name: 'session',
    keys: ['key1', 'key2'],
    maxAge: 24 * 60 * 60 * 1000, // 24 hours
    path: '/',
    httpOnly: true,
    secure: true
  }));

Managing Sessions

Once the middleware is set up, you can manage session data like so:

  app.get('/login', (req, res) => {
    req.session.user = { name: 'John Doe' };
    res.send('User logged in');
  });
  
  app.get('/profile', (req, res) => {
    if (req.session.user) {
      res.send(`Welcome ${req.session.user.name}`);
    } else {
      res.send('Please log in first');
    }
  });
  
  app.get('/logout', (req, res) => {
    req.session = null;
    res.send('User logged out');
  });

Complete Application Example

  const express = require('express');
  const cookieSession = require('cookie-session');
  
  const app = express();
  
  app.use(cookieSession({
    name: 'session',
    keys: ['key1', 'key2'],
    maxAge: 24 * 60 * 60 * 1000
  }));
  
  app.get('/', (req, res) => {
    req.session.views = (req.session.views || 0) + 1;
    res.send(`Views: ${req.session.views}`);
  });
  
  app.get('/login', (req, res) => {
    req.session.user = { name: 'John Doe' };
    res.send('User logged in');
  });
  
  app.get('/profile', (req, res) => {
    if (req.session.user) {
      res.send(`Welcome ${req.session.user.name}`);
    } else {
      res.send('Please log in first');
    }
  });
  
  app.get('/logout', (req, res) => {
    req.session = null;
    res.send('User logged out');
  });
  
  app.listen(3000, () => {
    console.log('Server is running on port 3000');
  });

By leveraging the cookie-session module, you can efficiently manage user sessions in your web application, ensuring a smooth and secure user experience.

Hash: 968e1d609bc55a71d5fc75d3638a2574bc079359a7578097b420748b87275abe