如何进行单用户认证和授权？ 或者如何限制在 node js 中注册到应用程序的用户数量？

Question

I want to make a simple app using MERN ( Mongo , Express , React , Node ), in which only one person will have to upload pics or write a blog; clients can only view in general. So, I want to create one user authentication. How can I achieve this?

Answer 1

• Store sessions in the database
• Add a field called, say, "inuse" to the session document
• Set that field to 1 when storing the session
• Add a unique index with that key

This will prevent your application from being able to store more than one session at a time.

You would then need to devise a mechanism for expiring sessions that are abandoned (ie user doesn't explicitly click "log out" button) as well as figure out what to do if, say, your browser crashes and you can't use the established session but it's still within the session inactivity timeout.