seratch/Gemfile

## readme.md

      
    Raw
  

              readme.md
            
          
    Twitter 認証付き Sinatra アプリをつくろう

Twitter App を用意

https://apps.twitter.com/
API Keys のタブから「Application settings」を参照して使います。
https://apps.twitter.com/app/***/keys

API key
API secret

が必要な項目です。
post させるアプリをつくるなら「Access level」が「Read and write」であることを確認してください。
注意点としては「Settings」の「Callback URL」が未設定だとエラーになります。
OmniAuth

OAuth 1.0a, 2.0, OpenID など色々ある認証・認可のプロトコルの差異を吸収して、扱いやすい認証・認可の仕組みをプラグイン機構として提供している gem。
https://github.com/intridea/omniauth
Rails でよく利用されるが Rails だけでなく Sinatra でも利用可能。
Sinatra app with OmniAuth

http://recipes.sinatrarb.com/p/middleware/twitter_authentication_with_omniauth
アプリの起動

bundle exec ruby app.rb


## app.rb
require 'sinatra'
require 'omniauth-twitter'
require 'twitter'
require 'json'

# load ./.env file
require 'dotenv'
Dotenv.load
puts "ENV['TWITTER_CONSUMER_KEY']: #{ENV['TWITTER_CONSUMER_KEY']}"

set :server, :thin
set :session_secret, DateTime.now.to_s

configure do
  enable :sessions
  use OmniAuth::Builder do
    provider :twitter, ENV['TWITTER_CONSUMER_KEY'], ENV['TWITTER_CONSUMER_SECRET']
  end
end

helpers do
  def logged_in?
    session[:twitter_oauth]
  end

  def twitter
    Twitter::REST::Client.new do |config|
      config.consumer_key        = ENV['TWITTER_CONSUMER_KEY']
      config.consumer_secret     = ENV['TWITTER_CONSUMER_SECRET']
      config.access_token        = session[:twitter_oauth][:token]
      config.access_token_secret = session[:twitter_oauth][:secret]
    end
  end
end

before do
  pass if request.path_info =~ /^\/auth\//
  redirect to('/auth/twitter') unless logged_in?
end

get '/auth/twitter/callback' do
  session[:twitter_oauth] = env['omniauth.auth'][:credentials]
  redirect to('/')
end

get '/auth/failure' do
end

get '/' do
  @oauth = session[:twitter_oauth]
  @timeline = twitter.home_timeline
  erb :index
end

get '/logout' do
  session.clear
  redirect to('/')
end

## Gemfile
source 'https://rubygems.org/'

gem 'sinatra'
gem 'omniauth-twitter'
gem 'json'
gem 'twitter'
gem 'dotenv'
gem 'thin'

## views_index.erb
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
  </head>
  <body>
    <a href="/logout">Logout</a><br/>
    <hr/>
    <h2>Access Token</h2>
    <pre><%= JSON.pretty_generate(@oauth) %></pre>
    <hr/>
    <h2>Home Timeline</h2>
    <% @timeline.each do |tweet| %>
      <!--<pre><%= JSON.pretty_generate(tweet.attrs) %></pre>-->
      <p><%= tweet.text %> by @<%= tweet.user.screen_name %></p>
    <% end %>
  </body>
</html>
	require 'sinatra'
	require 'omniauth-twitter'
	require 'twitter'
	require 'json'

	# load ./.env file
	require 'dotenv'
	Dotenv.load
	puts "ENV['TWITTER_CONSUMER_KEY']: #{ENV['TWITTER_CONSUMER_KEY']}"

	set :server, :thin
	set :session_secret, DateTime.now.to_s

	configure do
	enable :sessions
	use OmniAuth::Builder do
	provider :twitter, ENV['TWITTER_CONSUMER_KEY'], ENV['TWITTER_CONSUMER_SECRET']
	end
	end

	helpers do
	def logged_in?
	session[:twitter_oauth]
	end

	def twitter
	Twitter::REST::Client.new do \|config\|
	config.consumer_key = ENV['TWITTER_CONSUMER_KEY']
	config.consumer_secret = ENV['TWITTER_CONSUMER_SECRET']
	config.access_token = session[:twitter_oauth][:token]
	config.access_token_secret = session[:twitter_oauth][:secret]
	end
	end
	end

	before do
	pass if request.path_info =~ /^\/auth\//
	redirect to('/auth/twitter') unless logged_in?
	end

	get '/auth/twitter/callback' do
	session[:twitter_oauth] = env['omniauth.auth'][:credentials]
	redirect to('/')
	end

	get '/auth/failure' do
	end

	get '/' do
	@oauth = session[:twitter_oauth]
	@timeline = twitter.home_timeline
	erb :index
	end

	get '/logout' do
	session.clear
	redirect to('/')
	end
	source 'https://rubygems.org/'

	gem 'sinatra'
	gem 'omniauth-twitter'
	gem 'json'
	gem 'twitter'
	gem 'dotenv'
	gem 'thin'
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	</head>
	<body>
	<a href="/logout">Logout</a><br/>
	<hr/>
	<h2>Access Token</h2>
	<pre><%= JSON.pretty_generate(@oauth) %></pre>
	<hr/>
	<h2>Home Timeline</h2>
	<% @timeline.each do \|tweet\| %>
	<!--<pre><%= JSON.pretty_generate(tweet.attrs) %></pre>-->
	<p><%= tweet.text %> by @<%= tweet.user.screen_name %></p>
	<% end %>
	</body>
	</html>