Creating Rest Web Service with an existing asp.net mvc 5 app

Question

I have an existing asp.net mvc5 web application that uses the standard UserManager classes to perform authentication using the Entity Framework, so i need now to create a RESTful web service to do authentication and to store and update user details.

I'd like also to continue using the ASP.NET identity AspNetRoles table to manage the roles for user once he/she logged in.

Any idea please or do you have any links that can help me cause i'm new in the web service thing.

Answer 1

There is a perfect way while using flag to detect whether someone is already logged in or not and in case if System get power off , you need an event handler called as SystemEvents.SessionEnds.

 

Use this to change the flag value from true to false

 

Use this link as a reference

https://stackoverflow.com/questions/6799955/how-to-detect-windows-shutdown-or-logoff 

Answer 2

Hey Ajeesh

 

one more question... ??

 

If power off happen then how you suppose to Reset the flag

 

Answer 3

You can take a look at this article which discuss a similar topic. 

 

https://blog.learningtree.com/preventing-duplicate-logins-in-asp-net/

 

Another option would be to have a flag in your table and set the value to true when an user login and when user log off set the value to false.  Also for when a second user tries to login we will first check if login flag has been set to true for any other user. If its true then show message to user and display the login page, if not allow the user to login.