Deleting the current session with Rack::Session::Cookie

Question

I feel like I'm missing something obvious here, and I'm hoping that as soon as I post this someone will shame me with the google search link I was missing :-)

enable :sessions

get '/logout' do
  # What goes here to kill the session?
end

Answer 1

Just use

session.clear

to destroy the session.

Answer 2

It depends how you create your session. Simply you have to nulify session entry. Here is simple example, how to create and destroy sessions.

  get '/login' do
    session[:username] = params[:username]
    "logged in as #{session[:username]}"
  end

  get '/logout' do
    old_user = session[:username]
    session[:username] = nil
    "logged out #{old_user}"
  end

You can also check this example: https://gist.github.com/131401