【0.元となるリクエスト】
http://ecs.amazonaws.jp/onca/xml?Service=AWSECommerceService&AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA&Version=2013-08-01&Operation=ItemSearch&SearchIndex=All&Keywords=アナと雪の女王&AssociateTag=nogusan-22&ResponseGroup=ItemAttributes,Offers
【1.タイムスタンプを付ける】
http://ecs.amazonaws.jp/onca/xml?Service=AWSECommerceService&AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA&Version=2013-08-01&Operation=ItemSearch&SearchIndex=All&Keywords=アナと雪の女王&AssociateTag=nogusan-22&ResponseGroup=ItemAttributes,Offers&Timestamp=2026-04-20T05:13:11Z
【2.「RFC 3986」形式でエンコーディング】
http://ecs.amazonaws.jp/onca/xml?Service=AWSECommerceService&AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA&Version=2013-08-01&Operation=ItemSearch&SearchIndex=All&Keywords=%E3%82%A2%E3%83%8A%E3%81%A8%E9%9B%AA%E3%81%AE%E5%A5%B3%E7%8E%8B&AssociateTag=nogusan-22&ResponseGroup=ItemAttributes%2COffers&Timestamp=2026-04-20T05%3A13%3A11Z
【3.「&」とか消して改行】
Service=AWSECommerceService AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA Version=2013-08-01 Operation=ItemSearch SearchIndex=All Keywords=%E3%82%A2%E3%83%8A%E3%81%A8%E9%9B%AA%E3%81%AE%E5%A5%B3%E7%8E%8B AssociateTag=nogusan-22 ResponseGroup=ItemAttributes%2COffers Timestamp=2026-04-20T05%3A13%3A11Z
【4.パラメーター名で昇順ソート】
AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA AssociateTag=nogusan-22 Keywords=%E3%82%A2%E3%83%8A%E3%81%A8%E9%9B%AA%E3%81%AE%E5%A5%B3%E7%8E%8B Operation=ItemSearch ResponseGroup=ItemAttributes%2COffers SearchIndex=All Service=AWSECommerceService Timestamp=2026-04-20T05%3A13%3A11Z Version=2013-08-01
【5.もう一度「&」でつなぐ】
AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA&AssociateTag=nogusan-22&Keywords=%E3%82%A2%E3%83%8A%E3%81%A8%E9%9B%AA%E3%81%AE%E5%A5%B3%E7%8E%8B&Operation=ItemSearch&ResponseGroup=ItemAttributes%2COffers&SearchIndex=All&Service=AWSECommerceService&Timestamp=2026-04-20T05%3A13%3A11Z&Version=2013-08-01
【6.3行を頭に追加】
GET ecs.amazonaws.jp /onca/xml AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA&AssociateTag=nogusan-22&Keywords=%E3%82%A2%E3%83%8A%E3%81%A8%E9%9B%AA%E3%81%AE%E5%A5%B3%E7%8E%8B&Operation=ItemSearch&ResponseGroup=ItemAttributes%2COffers&SearchIndex=All&Service=AWSECommerceService&Timestamp=2026-04-20T05%3A13%3A11Z&Version=2013-08-01
【7.よく分からんエンコーディング】
uMVO0hGcGWggZAY%2BnD6tG3uVtFrxzLivSPY1WRE45Yk%3D
【8.「Signature」として最後に追加】
http://ecs.amazonaws.jp/onca/xml?AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA&AssociateTag=nogusan-22&Keywords=%E3%82%A2%E3%83%8A%E3%81%A8%E9%9B%AA%E3%81%AE%E5%A5%B3%E7%8E%8B&Operation=ItemSearch&ResponseGroup=ItemAttributes%2COffers&SearchIndex=All&Service=AWSECommerceService&Timestamp=2026-04-20T05%3A13%3A11Z&Version=2013-08-01&Signature=uMVO0hGcGWggZAY%2BnD6tG3uVtFrxzLivSPY1WRE45Yk%3D
結果