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What is the preferred way to store some data on the users computer for long periods of time. I am unsure how long a session lives. As an alternative I could store the data in a cookie, but here I can’t find any high level storing API which also takes care of signing my data and make sure it is not tampered with.
How do you typically solve this problem of having a persistent user id between sessions.
Check out these links, they might help you on understanding the cookie handling:
http://m.onkey.org/signed-and-permanent-cookies-in-rails-3
http://www.quarkruby.com/2007/10/21/sessions-and-cookies-in-ruby-on-rails
http://www.tutorialspoint.com/ruby-on-rails/rails-session-cookies.htm