Amazon Product Advertising APIの認証の件 - zorioの日記参考：http://chalow.net/2009-05-09-1.html 今後はOpenIDみたいにAWSにシグネチャが要るとか。 rubyで書いてみた。 require "openssl" require "base64" key = "1234567890" req = [ "AWSAccessKeyId=00000000000000000000", "ItemId=0679722769", "Operation=ItemLookup", "ResponseGroup=ItemAttributes%2COffers%2CImages%2CReviews", "Service=AWSECommerceService", "Timestamp=2009-01-01T12%3A00%3A00Z", "Version=2009-01-06"].join("&") message = ["G
