OmniAuth Canvas

Gem to authenticate with Instructure Canvas via OAuth2

Background

OmniAuth Canvas grew out of the need to simplify the process of setting up LTI and connecting a user account on http://www.OpenTapestry.com to Instructure Canvas.

Setup

Contact Instructure or your Canvas administrator to get an OAuth key and secret. By default omniauth-canvas will attempt to authenticate with http://canvas.instructure.com.

NOTE: you will need to set env['rack.session']['oauth_site'] to the current Canvas instance that you wish to OAuth with. By default this is https://canvas.instructure.com

To dynamically set the canvas site url do one of the following.

Standard setup

use OmniAuth::Builder do
  provider :canvas, 'canvas_key', 'canvas_secret', :setup => lambda{|env|
    request = Rack::Request.new(env)
    env['omniauth.strategy'].options[:client_options].site = env['rack.session']['oauth_site']
  }
end

Setup with Devise

config.omniauth :canvas, 'canvas_key', 'canvas_secret', :setup => lambda{|env|
  request = Rack::Request.new(env)
  env['omniauth.strategy'].options[:client_options].site = env['rack.session']['oauth_site']
}

Alernative Setup

In this setup, you do not have to set env['rack.session']['oauth_site']

Rails.application.config.middleware.use OmniAuth::Builder do
  provider :canvas, APP_CONFIG['canvas_client_id'], APP_CONFIG['canvas_client_secret'],
  {
    :client_options => {
      :site => APP_CONFIG['canvas_host']
    }
  }
end

Canvas Configuration

If you are running your own installation of canvas, you can generate a client ID and secret in the Site Admin account of your Canvas install. There will be a "Developer Keys" tab on the left navigation sidebar. For more information, consult the Canvas OAuth Documentation

License

Copyright (C) 2012-2016 by Justin Ball and Atomic Jolt.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.