README.markdown

Rack::OpenID example

This config.ru Rackup file is an example of a simple Rack application using Rack::OpenID

config.ru

require 'rack/openid'

use Rack::Session::Cookie
use Rack::OpenID

run lambda {|env|
  request = Rack::Request.new env
  session = env['rack.session']

  # /logout should clear the session and redirect back to /
  if env['PATH_INFO'] == '/logout'
    session.clear
    [ 302, { 'Location' => '/' }, [] ]

  # if we got a response from OpenID, save it in the session and redirect back to /
  elsif openid_response = env['rack.openid.response']
    session[:openid] = openid_response
    [ 302, { 'Location' => '/' }, [] ]

  # if we POST the form (with an openid_url field), redirect the user to login via OpenID
  elsif openid_url = request.params['openid_url']
    [ 401, { 'WWW-Authenticate' => "OpenID identifier=\"#{ openid_url }\""}, [] ]

  # display a page with a login form and the user's current logged in status
  else
    if session[:openid]
      if session[:openid].status == :failure
        login_status = "Login Failed: #{ session[:openid].message }"
      else
        login_status = "Logged in as: #{ session[:openid].identity_url }"
      end
    end
    [ 200, { 'Content-Type' => 'text/html' }, %{
      <a href="/logout">Logout</a>
      <p>#{ login_status }</p>
      <pre style="overflow: auto; max-height: 100px; border: 1px solid gray;">#{ session[:openid].to_yaml }</pre>
      <form action="/" method="post">
        OpenID URL: <input type="text" name="openid_url" />
        <input type="submit" value="Login" />
      </form>
    } ]
  end
}