Refresh token pattern in Spring Boot - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of a refresh token in authentication?

A refresh token is used to get a new access token without asking the user to log in again. It helps keep the user logged in smoothly.

intermediate

How does the refresh token pattern improve security compared to long-lived access tokens?

It uses short-lived access tokens that expire quickly, reducing risk if stolen. The refresh token is stored securely and used to get new access tokens, limiting exposure.

intermediate

In Spring Boot, where is the refresh token usually stored on the client side?

The refresh token is often stored in an HttpOnly cookie to prevent JavaScript access and reduce cross-site scripting risks.

beginner

What happens if a refresh token is expired or invalid in the refresh token pattern?

The user must log in again because the system cannot issue a new access token without a valid refresh token.

intermediate

Describe the typical flow of the refresh token pattern in Spring Boot.

1. User logs in and receives access and refresh tokens.<br>2. Access token is used for API calls.<br>3. When access token expires, client sends refresh token to get a new access token.<br>4. Server validates refresh token and issues new access token.<br>5. If refresh token is invalid, user must log in again.

What is the main role of a refresh token?

A To encrypt API requests

B To replace the password

C To get a new access token without user login

D To store user profile data

A refresh token allows the client to request a new access token without making the user log in again.

Where should refresh tokens be stored on the client for better security in Spring Boot apps?

A Local storage

B HttpOnly cookie

C Session storage

D In the URL

HttpOnly cookies prevent JavaScript access, reducing risk of token theft via cross-site scripting.

What happens if the refresh token is expired when the client tries to get a new access token?

A The client must log in again

B The server issues a new refresh token automatically

C The access token is extended automatically

D The server ignores the request

An expired refresh token means the client cannot get a new access token and must ask the user to log in again.

Why use short-lived access tokens with refresh tokens?

A To limit damage if access token is stolen

B To reduce server load

C To improve user interface speed

D To store more user data

Short-lived access tokens reduce the time a stolen token can be used, improving security.

In the refresh token pattern, which token is sent with every API request?

A Refresh token

B Both tokens

C No token

D Access token

The access token is sent with API requests to authorize them; the refresh token is only used to get new access tokens.

Explain the refresh token pattern and why it is used in Spring Boot applications.

Think about how to keep users logged in safely without long-lasting tokens.

Describe the steps involved when a client uses a refresh token to get a new access token.

Focus on the communication between client and server during token renewal.