Omniauth for Coposition
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This gem allows you to quickly and easily integrate the Coposition into your website, allowing your users to authorize your application to access their Coposition data. Follow the Installation and Usage guide to get started.


Add this line to your application's Gemfile:

gem 'omniauth-coposition-oauth2'

And then execute:

$ bundle

Or install it yourself as:

$ gem install omniauth-coposition-oauth2


  1. Register a developer account on Coposition ( A corresponding oauth application will be created automatically.

  2. Add this gem as a dependency to your application.

  3. Within a new initializer, add a new omniauth provider with following settings:

provider :coposition_oauth2,

We recommend using env vars here for security reasons.

  1. Values for COPOSITION_CLIENT_ID and COPOSITION_CLIENT_SECRET can be found on your Coposition developer console. (

  2. Add callback route to your application. It will triggered by oauth server after a user authenticates your app. For example:

get "/auth/:provider/callback", to: "sessions#create"
  1. Finally, add a link inviting users to authenticate via Coposition (omniauth_coposition_path helper) into application pages. It could look like this (with slim templates):
= button_to(omniauth_coposition_path, class: "bonus__sign-in btn green") do
  | Authenticate with Coposition

With a helper like this:

def omniauth_coposition_path
  path_params = { path: "/auth/coposition_oauth2" }

Or you can use "/auth/coposition_oauth2" directly. Please note that included redirect_uri should match the one you previously added as a oauth application param. This should be valid url which means that 'localhost' won't work and should be replaced with a working url.

  1. A hash with authentication data is returned to callback route specified request.env["omniauth.auth"]

You can then access the access token and user info returned by calling methods info and uid on the hash.


To revoke an existing access token, post to with a body containing a hash of your client_id, client_secret and the acess token.

{ 'client_id': CLIENT_UID, 'client_secret': CLIENT_SECRET, 'token': ACCESS_TOKEN }


After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at[USERNAME]/omniauth-coposition-oauth2.


The gem is available as open source under the terms of the MIT License.