OAuth2Checker ruby gem

oauth2-checker.gemspec

Gem::Specification.new do |s|
  s.name        = 'oauth2-checker'
  s.version     = '0.1.0'
  s.summary     = "OAuth2Checker"
  s.description = "Just a simple OAuth2 token info checker"
  s.authors     = ["Sandro Mehic", "Alessio Caiazza"]
  s.email       = 'devs@facts4.work'
  s.homepage    = 'http://facts4workers.eu/'
  s.files       = ["oauth2_checker.rb"]
  s.add_runtime_dependency 'oauth2', '~> 1.1'
end

oauth2_checker.rb

require 'oauth2'

class OAuth2Checker
  def initialize(client_id, client_secret, options = {}, &block)
    @client = OAuth2::Client.new(client_id, client_secret, options, block)
  end

  def check_access_token(token)
    # raise exception if no token exists
    # at = AccessToken.where(token: token).take

    # try to check if token is still valid with oauth provider
    begin
      # try to do a request to the oauth provider
      req = @client.request(:get, "oauth/token/info", {:params => {:access_token => token}})
      # if i got here, the request was success => token is valid
      return token
    rescue
      # unexisting or expired token, access denied
      return false
    end
  end

  def get_resource_owner(token)
    begin
      req = @client.request(:get, "oauth/token/info", {:params => {:access_token => token}})
      return req.parsed["resource_owner_id"]
    rescue
      return "undefined"
    end
  end
end