Linkedin Oauth: Exchanging JSAPI token for a REST token using Ruby/Rails and the linkedin gem

linkedin.js.coffee

    $.getScript("https://platform.linkedin.com/in.js?async=true", ->
      IN.init({
        api_key: <<API Key>>,
        authorize: true,
        credentials_cookie: true
      })
    )
    
    
    linkedinImport = ->
      IN.User.authorize( ->
        $.post('https://localhost:3000/oauth/linkedin')
      )

oauth.rb

#initializer

ENV["LINKEDIN_APP_ID"] = #<<OAuth User Token>>
ENV['LINKEDIN_SECRET'] = #<<OAuth User Secret>>
ENV['LINKEDIN_API_KEY'] = #<<API Key>>
ENV['LINKEDIN_API_SECRET'] = #<<Secret Key>>

oauth_controller.rb

class OauthController < Api::ApiController
  def linkedin
    linkedin_auth = JSON.parse(request.cookies["linkedin_oauth_#{ENV['LINKEDIN_API_KEY']}"])
    client = LinkedIn::Client.new(ENV["LINKEDIN_API_KEY"], ENV['LINKEDIN_API_SECRET'])
    consumer = client.consumer
    token = consumer.get_access_token(nil, {}, {
      'xoauth_oauth2_access_token' => linkedin_auth['access_token']
    })
    client.authorize_from_access(token.token, token.secret)

    profile_info = client.profile({
      :fields => ['id', 'first-name', 'last-name', 'picture-url', 'positions:(title,company:(name))']
    })
    
    #do whatever
  end
end