client.rb

module TwitterOAuth
  class Client
    
    def initialize(options = {})
      @consumer_key = options[:consumer_key]
      @consumer_secret = options[:consumer_secret]
      @token = options[:token]
      @secret = options[:secret]
    end
  
    def authorize(token, secret, options = {})
      request_token = OAuth::RequestToken.new(
        consumer, token, secret
      )
      @access_token = request_token.get_access_token(options)
      @token = @access_token.token
      @secret = @access_token.secret
      @access_token
    end

tweeter controller

class TweetersController < ApplicationController

require 'rubygems'
require 'twitter_oauth'


  def index
  end

  def auth

    @client = TwitterOAuth::Client.new(:consumer_key => 'NNN', :consumer_secret => 'NNNNNN')
    request_token = @client.request_token(:oauth_callback => 'http://0.0.0.0:3000/success')

    session[:request_token] = request_token.token
    session[:request_token_secret] = request_token.secret

    redirect_to request_token.authorize_url

  end

  def success
    @access_token = @client.authorize(session[:request_token], session[:request_token_secret], :oauth_verifier => params[:oauth_verifier])

    if @client.authorized?
      @client.update('checking out the twitter_oauth library') # sends a twitter status update
     else
      redirect_to "/"
    end
  end


end