AJAX呼吁不同的用户

So basically, i have a web app. And when a users enter, and gives some input, what he sees changes based on his input, with content from the DB. The content that he sees, is taken from the DB and stored in a .json file, which is then later used to display to the user.

My question is...where do i store that info taken from the DB(in .json) for every user?... Right now my JS looks like this...

$.getJSON('HTTP://LOCALHOST:8093/file.json')....

I can't use the same "file.json" for every users, because if i have 3 users using my app simultaneously, it won't work...