【2.「RFC 3986」形式でエンコーディング】
http://ecs.amazonaws.jp/onca/xml?Service=AWSECommerceService&AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA&AssociateTag=nogusan-22&Version=2013-08-01&Operation=ItemSearch&SearchIndex=Electronics&BrowseNode=3210991&Sort=salesrank&ResponseGroup=ItemAttributes%2COffers%2CSalesRank%2CBrowseNodes&ItemPage=1&Timestamp=2026-04-20T05%3A13%3A03Z
【3.「&」とか消して改行】
Service=AWSECommerceService AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA AssociateTag=nogusan-22 Version=2013-08-01 Operation=ItemSearch SearchIndex=Electronics BrowseNode=3210991 Sort=salesrank ResponseGroup=ItemAttributes%2COffers%2CSalesRank%2CBrowseNodes ItemPage=1 Timestamp=2026-04-20T05%3A13%3A03Z
【4.パラメーター名で昇順ソート】
AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA AssociateTag=nogusan-22 BrowseNode=3210991 ItemPage=1 Operation=ItemSearch ResponseGroup=ItemAttributes%2COffers%2CSalesRank%2CBrowseNodes SearchIndex=Electronics Service=AWSECommerceService Sort=salesrank Timestamp=2026-04-20T05%3A13%3A03Z Version=2013-08-01
【5.もう一度「&」でつなぐ】
AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA&AssociateTag=nogusan-22&BrowseNode=3210991&ItemPage=1&Operation=ItemSearch&ResponseGroup=ItemAttributes%2COffers%2CSalesRank%2CBrowseNodes&SearchIndex=Electronics&Service=AWSECommerceService&Sort=salesrank&Timestamp=2026-04-20T05%3A13%3A03Z&Version=2013-08-01
【6.3行を頭に追加】
GET ecs.amazonaws.jp /onca/xml AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA&AssociateTag=nogusan-22&BrowseNode=3210991&ItemPage=1&Operation=ItemSearch&ResponseGroup=ItemAttributes%2COffers%2CSalesRank%2CBrowseNodes&SearchIndex=Electronics&Service=AWSECommerceService&Sort=salesrank&Timestamp=2026-04-20T05%3A13%3A03Z&Version=2013-08-01
【7.よく分からんエンコーディング】
l%2BhrCJesRXCrdmCcUxbUqN%2BFqcz6k%2BEChTvO03QkBQc%3D
【8.「Signature」として最後に追加】
http://ecs.amazonaws.jp/onca/xml?AWSAccessKeyId=AKIAJLYQSQJHOUNNHWXA&AssociateTag=nogusan-22&BrowseNode=3210991&ItemPage=1&Operation=ItemSearch&ResponseGroup=ItemAttributes%2COffers%2CSalesRank%2CBrowseNodes&SearchIndex=Electronics&Service=AWSECommerceService&Sort=salesrank&Timestamp=2026-04-20T05%3A13%3A03Z&Version=2013-08-01&Signature=l%2BhrCJesRXCrdmCcUxbUqN%2BFqcz6k%2BEChTvO03QkBQc%3D
結果