[Ruby]amazon-ecs を使った関連商品情報取得サンプル。関連商品5件の ASIN を取得する。ResponseGoup は Similarities を指定。

paapi-similarities-sample.rb

# encoding: utf-8

require 'amazon/ecs'
require 'yaml'
require 'nokogiri'

class PaapiSimilaritiesSample
  def initialize
    @config = YAML.load_file('./paapi-similarities-sample.yaml')

    Amazon::Ecs.options = {
      :associate_tag => @config['associate_tag'],
      :AWS_access_key_id => @config['AWS_access_key_id'],
      :AWS_secret_key => @config['AWS_secret_key']
    }
  end

  def search asin
    res = Amazon::Ecs.item_lookup(asin, :response_group => "Similarities", :country => 'jp')
    res.items.each do |item|
      Nokogiri::XML(item.to_s).xpath('/Item/SimilarProducts/SimilarProduct/ASIN').each do |node|
        p node.inner_text
      end
    end
  end

end

if __FILE__ == $0
  obj = PaapiSimilaritiesSample.new
  asin = "4894712288"
  asin = ARGV[0] unless ARGV[0] == nil
  obj.search(asin).each do |x|
    p x
  end
end

paapi-similarities-sample.yaml

associate_tag: XXX
AWS_access_key_id: YYY
AWS_secret_key: ZZZ