TumblrのConsumerKey/Secret入れて認証してAccessToken/Secret出力するだけのSinatraアプリケーション

tumblrauth.rb

# -*- coding: utf-8 -*-
##
## requiements
##   sinatra, padrino, haml, oauth
## install
##   $ gem install sinatra padrino haml oauth
## usage
##   $ rackup tumblrauth.rb
##

require 'sinatra/base'
require 'padrino-helpers'
require 'haml'
require 'oauth'

class Tumblrauth < Sinatra::Base
  register Padrino::Helpers
  set :haml, format: :html5
  enable :sessions
  enable :inline_templates

  def consumer(data)
    OAuth::Consumer.new(data[:key], data[:secret], {site: 'http://www.tumblr.com'})
  end

  get '/' do
    haml :index
  end

  post '/oauth' do
    session[:consumer] = {
      key: params[:key],
      secret: params[:secret]
    }
    @consumer = consumer session[:consumer]
    @request_token = @consumer.get_request_token
    session[:request] = {
      token: @request_token.token,
      secret: @request_token.secret
    }

    redirect @request_token.authorize_url
  end

  get '/callback' do
    @consumer = consumer(session[:consumer])
    @request_token = OAuth::RequestToken.new(@consumer, session[:request][:token], session[:request][:secret])
    @access_token = @request_token.get_access_token(oauth_token: params[:oauth_token], oauth_verifier: params[:oauth_verifier])
    session.delete :consumer
    session.delete :request

    haml :callback
  end
end

__END__
@@layout
!!!
%head
%body
  = yield

@@index
- form_tag :oauth do
  %p key
  %p= text_field_tag :key
  %p secret
  %p= text_field_tag :secret
  %p= submit_tag

@@callback
%p= "access token: #{@access_token.token}"
%p= "access token secret: #{@access_token.secret}"