Hasty Treat - Authentication: LocalStorage vs Cookies vs Sessions vs Tokens

Syntax - Tasty Web Development Treats - Een podcast door Wes Bos & Scott Tolinski - Full Stack JavaScript Web Developers

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In this Hasty Treat, Scott and Wes talk about authentication — the difference between localStorage, cookies, session, tokens and more!

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Show Notes

4:20 - How should we track users?

  • Token based - generally stored in the client
  • Session based - stored on the server
  • Token Based (JWT)

6:00 - Token-based auth

  • Stateless - the server does not maintain a list of logged in users
  • Scalable - you can use serverless functions easily
  • Cross domain
  • Data can be stored in JWT
  • Easy to use on non-web sites like mobile apps
  • Hard to expire tokens — you must maintain a list of blacklisted tokens

7:48 - Session-based auth

  • Stateful - generally you maintain a list of session IDs
  • Passive - once signed in, no need to send token again
  • Easy to destroy sessions

10:48 - How do we identify the user on each request? localStorage or Cookies?

  • A common misconception is that localStorage is for tokens while cookies is for sessions
  • With localStorage, we need to grab the token and send them along on each request
  • With cookies, the data is sent along on each request

11:25 - Security Issues

  • XSS for Tokens - make sure bad actors can’t run code on your site
  • Sanitize inputs
  • XSRF - CSRF tokens are needed

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