OmniAuth is a library that standardizes multi-provider authentication for web applications. Any developer can create strategies for OmniAuth that can authenticate users via disparate systems.
OmniAuth strategies have been created for everything from Facebook to LDAP.
To use OmniAuth, you need only
:provideris the name of the strategy (for example,
To use OmniAuth in a project with a Gemfile, just add each of the strategies you want to use individually:
gem 'omniauth-github' gem 'omniauth-openid'
Now you can use the
to build up your
list of OmniAuth strategies for use in your application:
Para saber mas sobre Rack y sobre Middlewares Rack, véanse las secciones
use OmniAuth::Builder do provider:github, ENV['GITHUB_KEY'], ENV['GITHUB_SECRET'] provider:openid, :store => OpenID::Store::Filesystem.new('/tmp') endBy default, OmniAuth will return auth information to the path
/auth/:provider/callbackinside the Rack environment.
In Sinatra, for example, a callback might look something like this:
# Support both GET and POST for callbacks %w(get post).each do |method| send(method, "/auth/:provider/callback") do env['omniauth.auth'] # => OmniAuth::AuthHash end end
Also of note, by default, if user authentication fails on the provider
side, OmniAuth will catch the response and then redirect the request
to the path
passing a corresponding error message in a
You may want to add an action to catch these cases. Continuing with the previous Sinatra example, you could add an action like this:
get '/auth/failure' do flash[:notice] = params[:message] # if using sinatra-flash or rack-flash redirect '/' end
In this link we can find a list of the strategies that are available for OmniAuth: List of Strategies for Omniauth.