httparty_oasis.rb

require 'httparty'
require 'open-uri'

class Oasis
  include HTTParty 
  base_uri 'availability.library.oregonstate.edu'
  headers 'accept' => 'application/json'
  
  class << self
    def availability(*ids)
      get '/availability', :query => { :id => ids.flatten }
    end
  end
end

response = Oasis.availability('b2537059','b2548930')