oauth_dance_mini_site.rb

Gemfile

source 'https://rubygems.org'
gem 'pry'
gem 'sinatra'
gem 'twitter'
gem 'oauth'

site.rb

require 'pry'
require 'sinatra'
require 'twitter'
require 'oauth'
require 'json'
CONSUMER_KEY = nil
CONSUMER_SECRET = nil

helpers do
  include Rack::Utils
  alias_method :h, :escape_html
end
 

configure do
  use Rack::Session::Cookie, :secret => Digest::SHA1.hexdigest(rand.to_s)
  KEY = CONSUMER_KEY
  SECRET = CONSUMER_SECRET
end

 
before do
  if session[:access_token]
    Twitter.configure do |config|
      config.consumer_key = CONSUMER_KEY
      config.consumer_secret = CONSUMER_SECRET
      config.oauth_token = session[:access_token]
      config.oauth_token_secret = session[:access_token_secret]
    end
    @twitter = Twitter::Client.new
  else
    @twitter = nil
  end
end



def base_url
  default_port = (request.scheme == "http") ? 80 : 443
  port = (request.port == default_port) ? "" : ":#{request.port.to_s}"
  "#{request.scheme}://#{request.host}#{port}"
end

 
def oauth_consumer
  OAuth::Consumer.new(KEY, SECRET, :site => "https://api.twitter.com")
end



get '/request_token' do
  #DONT FORGET - the callback_url needs to be added to the app's registration page otherwise this will return a 403 forbidden.
  callback_url = "#{base_url}/access_token"
  request_token = oauth_consumer.get_request_token(:oauth_callback => callback_url)
  session[:request_token] = request_token.token
  session[:request_token_secret] = request_token.secret
  redirect request_token.authorize_url
end

 
get '/access_token' do
  request_token = OAuth::RequestToken.new(
    oauth_consumer, session[:request_token], session[:request_token_secret])
  begin
    @access_token = request_token.get_access_token(
      {},
      :oauth_token => params[:oauth_token],
      :oauth_verifier => params[:oauth_verifier])
  rescue OAuth::Unauthorized => @exception
    return erb %{ oauth failed: <%=h @exception.message %> }
  end
  session[:access_token] = @access_token.token
  session[:access_token_secret] = @access_token.secret
  `echo #{{access_token: @access_token.token, access_secret: @access_token.secret, consumer_key: CONSUMER_KEY, consumer_secret: CONSUMER_SECRET}.to_json}\n >> keys.txt`
  redirect 'https://www.youtube.com/watch?v=k-cavEKkirc'
end


get '/' do
  erb :index
end


get '/login' do
  redirect '/' unless @twitter
  user = Twitter.user
  @user_name = user.name
end