EasyRackOpenID. Simplifies OpenID login for Rack apps.

Get Rack::OpenID of http://github.com/josh/rack-openid
gem install rack-openid


You:
require 'rack/openid'
use Rack::Session::Cookie
use Rack::OpenID
use EasyRackOpenID, :allowed_identifiers => ['http://example.com/']
run lambda {|env| [ 200, { 'Content-Type' => 'text/plain' }, [ 'Authenticated!' ] ] }


Basically, slap EasyRackOpenID in front of the App you want to protect. Rack::OpenID needs to be above it.
Rack:OpenID with noo arguments uses an in memory OpenID store. This is ok for trying out with rackup, but won't work in a variety of scenarios including using shotgun. You can pass it a different store like so:
use Rack::OpenID, OpenID::Store::Memcache.new

:allowed_identifiers is required for EasyRackOpenID to work. Give it an array of all the OpenIDs that you don't mind proceeding.

:default_return_to (optional) is a path just in case the automatic return_to mysteriously vanishes. Unlikely.

:login_path (optional) is where to send a user if login fails. Perhaps a login form?

:logout_path (optional, defaults to /logout) path that, when visited will clear the login session

:after_logout_path (optional) After a user logs out, send them here. (don't want the user sitting on the logout path)