This middleware ensures that a user is logged in. If a request is received that is unauthenticated, the request will be redirected to a login page. The URL will be saved in the session, so the user can be conveniently returned to the page that was originally requested.

Use the desktop library to save the state of Emacs from one session to another. Once you save the Emacs desktop—the buffers, their file names, major modes, buffer positions, and so on—then subsequent Emacs sessions reload the saved desktop. By default, the desktop also tries to save the frame and window configuration. To disable this, set desktop-restore-frames to nil. (See that variable’s documentation for some related options that you can customize to fine-tune this behavior.)