Скачать или смотреть Implementing Authentication in Spring Boot without Spring Security

Discover how to create a seamless login/logout experience in Spring Boot without Spring Security. Learn step-by-step methods for browser synchronization and user session management.
---
This video is based on the question https://stackoverflow.com/q/75683809/ asked by the user 'grxuau' ( https://stackoverflow.com/u/18067074/ ) and on the answer https://stackoverflow.com/a/75685784/ provided by the user 'Anilal' ( https://stackoverflow.com/u/10288029/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to do authentication on Spring Boot without using Spring Security?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Implement Authentication on Spring Boot without Using Spring Security

Implementing authentication for web applications is pivotal in providing a secure and engaging user experience. However, not every project requires the complexity of Spring Security. If you're working with Spring Boot and React and want to implement authentication without Spring Security, you're in the right place.

In this post, we'll explore an effective method to achieve this and ensure that user sessions are synchronized across multiple browser tabs.

The Challenge

The primary challenge arises when users log in or out from different tabs of the same browser. Here are the key points to address:

Automatic Login Across Tabs: If a user logs in on one tab, they should be automatically logged in on other open tabs.

Automatic Logout Synchronization: If a user logs out in one tab, other tabs should reflect this change and log the user out as well.

Solution Overview

To solve these challenges, we'll use browser local storage for session management along with polling mechanisms to synchronize user sessions across multiple tabs. Here’s a structured approach to tackle the issue:

Step-by-Step Implementation

Set Flags in Local Storage:

When a user logs in, we set a flag in the browser's local storage indicating that they are logged in.

When the user logs out, we clear or reset this flag.

Check User Session Upon Application Start:

Each time the UI application initializes, check the value of the flag in local storage.

If the flag is set, the user is assumed to be logged in; otherwise, display the login page.

Synchronize Logout Across Tabs:

Implementing a polling method allows your application to frequently check the local storage value.

If the flag is detected as cleared (i.e., the user logged out from another tab), trigger the logout process in the current tab.

Code Implementation

Here’s how you might implement the controller to handle authentication:

[[See Video to Reveal this Text or Code Snippet]]

Client-Side Logic Using React

In your React application, you can utilize local storage for session management as follows:

[[See Video to Reveal this Text or Code Snippet]]

Summary

Implementing authentication without Spring Security in a Spring Boot and React application can be achieved using browser local storage. This enables a smooth user experience across multiple tabs by effectively managing session states.

Key Takeaways

Use local storage to ensure seamless login/logout experience across tabs.

Implement polling for synchronization of user sessions.

This method is simple yet effective for many small to medium-sized applications without needing complex security frameworks.

By following these guidelines, you can maintain user authentication efficiently without the overhead of Spring Security.

Happy coding!