nu7hatch/app.rb

## app.rb
require 'rubygems'
require 'sinatra'
require 'omniauth/oauth'

set :sessions, true
set :layout, true

use OmniAuth::Builder do
  provider :twitter, 'key', 'secret'
end

get "/auth/twitter/callback" do
  auth = request.env["omniauth.auth"]
  session[:user] = auth['user_info']['name']
  erb :callback
end

get "/login" do
  erb :login
end

get "/logout" do
  session.delete(:user)
  redirect "/"
end

get "/" do
  @user = session[:user]
  erb :home
end

__END__
@@layout
<html>
  <head><title>OmniAuth popups</title></head>
  <body>
    <%= yield %>
  </body>
</html>

@@home
<script>
function openWindow(url, title, w, h) {
  var popup = window.open(url, title,
    'width='+w+', height='+h+', modal=no, resizable=no, toolbar=no, menubar=no,'+
    'scrollbars=no, alwaysRaise=yes'
  );
  popup.resizeBy(0, 50);
}
</script>
<% if @user %>
  Hello <%= @user %>! &middot; <a href="/logout">Logout</a>
<% else %>
  <a href="javascript:openWindow('/auth/twitter', 'Login with Twitter', 880, 380);">Login with Twitter</a><br />
<% end %>

@@callback
<script>
  window.opener.location.href = "/";
  window.close();
</script>
	require 'rubygems'
	require 'sinatra'
	require 'omniauth/oauth'

	set :sessions, true
	set :layout, true

	use OmniAuth::Builder do
	provider :twitter, 'key', 'secret'
	end

	get "/auth/twitter/callback" do
	auth = request.env["omniauth.auth"]
	session[:user] = auth['user_info']['name']
	erb :callback
	end

	get "/login" do
	erb :login
	end

	get "/logout" do
	session.delete(:user)
	redirect "/"
	end

	get "/" do
	@user = session[:user]
	erb :home
	end

	__END__
	@@layout
	<html>
	<head><title>OmniAuth popups</title></head>
	<body>
	<%= yield %>
	</body>
	</html>

	@@home
	<script>
	function openWindow(url, title, w, h) {
	var popup = window.open(url, title,
	'width='+w+', height='+h+', modal=no, resizable=no, toolbar=no, menubar=no,'+
	'scrollbars=no, alwaysRaise=yes'
	);
	popup.resizeBy(0, 50);
	}
	</script>
	<% if @user %>
	Hello <%= @user %>! · <a href="/logout">Logout</a>
	<% else %>
	<a href="javascript:openWindow('/auth/twitter', 'Login with Twitter', 880, 380);">Login with Twitter</a><br />
	<% end %>

	@@callback
	<script>
	window.opener.location.href = "/";
	window.close();
	</script>