Express webapp如何存储/访问用户设置

Question

Im currently developing a Nodejs/Express webapp similar to a dashboard/webbrowser homepage. The data is shown according to the user's settings. At the moment, I'm creating a json file (based on a template) when the user signs-up. This json file has the settings I need to access in order to show the information on the main page. Some of this information is: geolocation (city + country) to access a weather api (+ units, forecast days lenght, etc), a list of tvshows (so I can fetch a list of episodes from my db), etc.

At the moment, when a user logs-in, I'm reading this file about 4 times. I'm sure this is not a good idea, and although its working fine now, I can see the problems I'm going to have in the future (when I add more settings and/or get more traffic).

Since the webapp is almost done, I want to take care of this. I'm thinking on a couple of options:

1. Save the user settings in a session store (Redis eg)
2. Save the user settings in a cookie(s)
3. Read the file once when the user logs in, and cache it somehow

What's the best option to do this ?

Answer 1

If you're looking to store this information client-side (since you've mentioned cookies), you might consider looking into JavaScript's localStorage API (or sessionStorage if you want the data to expire when the user closes his/her browser).

localStorage is a key:value pair (like you'd get with Redis), but the data is stored locally on the user's device. As with any client-side storage solutions, you should never trust the data provided from localStorage without some verification, but it's a tool designed exactly for this kind of task.