gistfile1.rb

class PingdomClient 
  class << self
    def load_httparty
      require 'httparty'
      self.send(:include, HTTParty)
      self.class_eval do
        self.base_uri = 'https://api.pingdom.com/api/2.0'
      end
    end
  end

  def initialize(u,p,k)
    @auth = {:username => u, :password => p}
    @headers = {'App-Key' => k}
  end

  def get(uri, options={})
    options.merge!({:basic_auth => @auth})
    options.merge!({:headers => @headers})
    response = self.class.get(uri, options)
  end

  def put(uri, options={})
    options.merge!({:basic_auth => @auth})
    options.merge!({:headers => @headers})
    response = self.class.put(uri, options)
  end

  def post(uri, options={})
    options.merge!({:basic_auth => @auth})
    options.merge!({:headers => @headers})
    response = self.class.post(uri, options)
  end

  def delete(uri, options={})
    options.merge!({:basic_auth => @auth})
    options.merge!({:headers => @headers})
    response = self.class.delete(uri, options)
  end

  def checks(options={})
    options.merge!({:basic_auth => @auth})
    options.merge!({:headers => @headers})
    response = self.class.get('/checks', options).parsed_response
    checks = response['checks']
  end

end

######
# In your default recipe, something like this:

chef_gem 'httparty'

rb = ruby_block 'Enable httparty' do
  block do
    PingdomClient.load_httparty
  end
  not_if do
    PingdomClient.ancestors.include?(HTTParty)
  end
end
rb.run_action(:create)