沙洲会话如何运作？

Question

I'm supposed to use sandbar for a Clojure web application. I am wondering how sandbar maintains sessions on the server side? Does it us jsessionid cookies to identify user request? Or is sandbar just sending the session object back to the client, re-reading it from the request, manipulating the session and re-sending it back?

Answer 1

sandbar sessions use the same storage backends that ring sessions use, and wrap-stateful-session supports the same options that ring's wrap-session uses. So you can use any session key you like (it's not jsessionid by default) and your preferred store. The default is an in-memory store.

Answer 2

Each user gets a unique session ID, and that's all that's sent to the user in a cookie. Server-side, there's a mutable object mapping session IDs to objects - sandbar updates and reads from this based on the current session ID.