httparty/examples/aaws.rb

require 'rubygems'
require 'active_support'
require 'active_support/core_ext/hash'
require 'active_support/core_ext/string'

dir = File.expand_path(File.join(File.dirname(__FILE__), '..', 'lib'))
require File.join(dir, 'httparty')
require 'pp'
config = YAML.load(File.read(File.join(ENV['HOME'], '.aaws')))

module AAWS
  class Book
    include HTTParty
    base_uri 'http://ecs.amazonaws.com'
    default_params Service: 'AWSECommerceService', Operation: 'ItemSearch', SearchIndex: 'Books'

    def initialize(key)
      @auth = { AWSAccessKeyId: key }
    end

    def search(options = {})
      raise ArgumentError, 'You must search for something' if options[:query].blank?

      # amazon uses nasty camelized query params
      options[:query] = options[:query]
        .reverse_merge(@auth)
        .transform_keys { |k| k.to_s.camelize }

      # make a request and return the items (NOTE: this doesn't handle errors at this point)
      self.class.get('/onca/xml', options)['ItemSearchResponse']['Items']
    end
  end
end

aaws = AAWS::Book.new(config[:access_key])
pp aaws.search(query: { title: 'Ruby On Rails' })