毎日眠くて仕方がない

require 'net/http'  
require "rexml/document"  
 
class AmazonList < ActiveRecord::Base  
  include REXML  
 
  ASSOCIATE_TAG = 'アソシエートID'  
  AWS_ACCESS_KEY_ID = 'AWSのアクセスID'  
  SEARCH_ELEMENT = 'ItemLookupResponse/Items/Item/'  
 
  def self.find_web(asin)  
    Net::HTTP.version_1_2  
 
    item = self.find_by_asin(asin)  
    if (item == nil) || (item.updated_on.to_time.since(7.days) < Time.now)  
      amazon_list = Hash.new  
      Net::HTTP::start('webservices.amazon.co.jp') do |http|  
        response = http.get("/onca/xml?Service=AWSECommerceService&\  
                             AWSAccessKeyId=#{AWS_ACCESS_KEY_ID}&\  
                             AssociateTag=#{ASSOCIATE_TAG}&\  
                             Operation=ItemLookup&\  
                             ItemId=#{asin}&\  
                             ResponseGroup=Medium")  
        elements = Document.new(response.body).elements  
 
        elements.each("#{SEARCH_ELEMENT}MediumImage/URL")  do |element|  
          amazon_list[:image_url_medium] = element.text  
        end  
 
        elements.each("#{SEARCH_ELEMENT}SmallImage/URL") do |element|  
          amazon_list[:image_url_small] = element.text  
        end  
 
        elements.each("#{SEARCH_ELEMENT}ItemAttributes/Title") do |element|  
          amazon_list[:product_name] = element.text  
        end  
 
        elements.each("#{SEARCH_ELEMENT}DetailPageURL") do |element|  
          amazon_list[:url] = element.text  
        end  
 
        elements.each("#{SEARCH_ELEMENT}ItemAttributes/Manufacturer") do |element|  
          amazon_list[:manufacturer] = element.text  
        end  
 
        elements.each("#{SEARCH_ELEMENT}ItemAttributes/Binding") do |element|  
          amazon_list[:media] = element.text  
        end  
 
        elements.each("#{SEARCH_ELEMENT}ItemAttributes/ReleaseDate") do |element|  
          amazon_list[:release_date] = element.text  
        end  
 
        elements.each("#{SEARCH_ELEMENT}ItemAttributes/PublicationDate") do |element|  
          amazon_list[:release_date] = element.text  
        end  
 
        authors = Array.new  
        elements.each("#{SEARCH_ELEMENT}ItemAttributes/Author") do |element|  
          authors << element.text  
        end  
        amazon_list[:authors] = authors.join(',') unless authors.empty?  
 
        artists = Array.new  
        elements.each("#{SEARCH_ELEMENT}ItemAttributes/Artist") do |element|  
          artists << element.text  
        end  
        amazon_list[:artists] = artists.join(',') unless artists.empty?  
      end  
 
      if item  
        item.update_attributes(amazon_list)  
      else  
        amazon_list[:asin] = asin  
        item = self.new(amazon_list)  
        item.save  
      end  
    end  
 
    return item  
  end  
end