gistfile1.rb

        get '/auth/twitter' do
          oauth = OAuth::Consumer.new(Settings::TWITTER_OAUTH_CONSUMER_KEY, 
                                      Settings::TWITTER_OAUTH_CONSUMER_SECRET,
                                       { :site => "http://twitter.com" })
          request_token = oauth.get_request_token(:oauth_callback => full_uri('/auth/twitter/callback'))

          session[:oauth_twitter_reqtoken] = request_token.token
          session[:oauth_twitter_reqtoken_secret] = request_token.secret

          redirect request_token.authorize_url
        end

        get '/auth/twitter/callback' do
          oauth = OAuth::Consumer.new(Settings::TWITTER_OAUTH_CONSUMER_KEY, 
                                      Settings::TWITTER_OAUTH_CONSUMER_SECRET,
                                       { :site => "http://twitter.com" })
          request_token = OAuth::RequestToken.new(oauth, session[:oauth_twitter_reqtoken],
                                                  session[:oauth_twitter_reqtoken_secret])
          access_token = request_token.get_access_token(
                           :oauth_verifier => params[:oauth_verifier])
          
          session.delete :oauth_twitter_reqtoken
          session.delete :oauth_twitter_reqtoken_secret
          
          # Get account details from Twitter
          response = oauth.request(:get, '/account/verify_credentials.json',
                                   access_token, { :scheme => :query_string })

          # Then do stuff with the details
          twitter_info = JSON.parse(response.body)
          # twitter_info.inspect
          
          u = User.where("twitterinfo.user_id" => twitter_info["id"]).one
          u = User.create_from_twitter(twitter_info, access_token) if u.nil?
          
          login u.id
          redirect '/'
        end