162 lines
6.5 KiB
Markdown
162 lines
6.5 KiB
Markdown
---
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title: AmazonのWebサービスを使ってみる
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author: kazu634
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date: 2009-05-28
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wordtwit_post_info:
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- 'O:8:"stdClass":13:{s:6:"manual";b:0;s:11:"tweet_times";i:1;s:5:"delay";i:0;s:7:"enabled";i:1;s:10:"separation";s:2:"60";s:7:"version";s:3:"3.7";s:14:"tweet_template";b:0;s:6:"status";i:2;s:6:"result";a:0:{}s:13:"tweet_counter";i:2;s:13:"tweet_log_ids";a:1:{i:0;i:4617;}s:9:"hash_tags";a:0:{}s:8:"accounts";a:1:{i:0;s:7:"kazu634";}}'
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categories:
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- Perl
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---
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<div class="section">
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<p>
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はてなで日記を書いて本の紹介をするときは、本の裏をめくってisbn13をasinに変換している。でも、この方法だと雑誌の場合うまくいかない。雑誌はasinでBから始まっている。普通のisbn13をasin(=isbn10)に変換するアルゴリズムでは変換できないからだ。
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</p>
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<p>
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ある日、ふとAmazonでisbn13(=実はバーコードの数字と同じ)を入力すると、検索できることが判明。前に試したときはできなかったような気がするのだけれど。。。でも、isbn13を入力すれば、Amazonで管理しているID(=asin)が判明することがわかった。
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</p>
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<p>
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というわけで、PerlでAmazonのWebサービスを使ってみようと決意したのであった。
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</p>
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<h4>
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Perlのコード
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</h4>
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<p>
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Perlの偉い人が「<a href="http://blog.livedoor.jp/dankogai/archives/51211577.html" onclick="__gaTracker('send', 'event', 'outbound-article', 'http://blog.livedoor.jp/dankogai/archives/51211577.html', '404 Blog Not Found:perl – URI::Amazon::APA released!');" target="_blank">404 Blog Not Found:perl – URI::Amazon::APA released!</a>」というのを公開しているので、それを活用する。とりあえずサンプルをそのままコピペしてみた。
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</p>
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<pre class="syntax-highlight">
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<span class="synComment"># === Libraries ===</span>
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<span class="synStatement">use strict</span>;
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<span class="synStatement">use warnings</span>;
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<span class="synStatement">use </span>LWP::UserAgent;
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<span class="synStatement">use </span>URI::Amazon::APA;
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<span class="synStatement">use </span>XML::Simple;
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<span class="synStatement">use </span>YAML::Syck;
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<span class="synComment"># === Main part ===</span>
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<span class="synStatement">my</span> <span class="synIdentifier">$u</span> = URI::Amazon::APA-><span class="synStatement">new</span>(<span class="synConstant">'http://ecs.amazonaws.jp/onca/xml'</span>);
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<span class="synIdentifier">$u</span>->query_form(
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<span class="synConstant">Service </span>=> <span class="synConstant">'AWSECommerceService'</span>,
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<span class="synConstant">Operation </span>=> <span class="synConstant">'ItemLookup'</span>,
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<span class="synConstant">ItemId </span>=> <span class="synStatement">shift</span> || <span class="synConstant">'9784798118925'</span>,
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<span class="synConstant">IdType </span>=> <span class="synConstant">'EAN'</span>,
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<span class="synConstant">SearchIndex </span>=> <span class="synConstant">'Books'</span>,
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);
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<span class="synIdentifier">$u</span>->sign(
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<span class="synConstant">key </span>=> <span class="synConstant">'キー'</span>,
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<span class="synConstant">secret </span>=> <span class="synConstant">'秘密鍵'</span>
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);
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<span class="synStatement">my</span> <span class="synIdentifier">$ua</span> = LWP::UserAgent-><span class="synStatement">new</span>;
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<span class="synStatement">my</span> <span class="synIdentifier">$r</span> = <span class="synIdentifier">$ua</span>->get(<span class="synIdentifier">$u</span>);
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<span class="synStatement">print</span> <span class="synIdentifier">$r</span>->status_line, <span class="synConstant">"</span><span class="synSpecial">\n</span><span class="synConstant">"</span>, YAML::Syck::Dump( XMLin( <span class="synIdentifier">$r</span>->content ) );
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</pre>
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<p>
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注意すべきは、
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</p>
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<ul>
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<li>
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IdTypeはEANを指定する(デフォルトだとasinで検索してしまうため。今回はバーコードの数字で検索できるように指定してあげる)
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</li>
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<li>
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SearchIndexはBooks(今回は本なので)
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</li>
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</ul>
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<p>
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という点です。
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</p>
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<h4>
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実行結果
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</h4>
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<p>
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実行してみます:
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</p>
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<pre class="syntax-highlight">
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~<span class="synStatement">/</span><span class="synConstant">bin on simoom634 </span><span class="synSpecial">[503]</span><span class="synConstant"> </span><span class="synIdentifier">$: </span><span class="synConstant">perl </span><span class="synSpecial">.</span><span class="synStatement">/</span>access_amazon.pl
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<span class="synConstant">200</span> OK
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---
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Items:
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Item:
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ASIN: <span class="synConstant">4798118923</span>
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DetailPageURL: http://www.amazon.co.jp/More-Joel-Software-Spolsky/dp/<span class="synConstant">4798118923</span>%3FSubscriptionId%3DAKIAI54BKVADN7EPRVZA%26tag%3Dws%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3D4798118923
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ItemAttributes:
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Author: Joel Spolsky
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Creator:
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Role: 翻訳
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content: 青木 靖
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Manufacturer: 翔泳社
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ProductGroup: Book
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Title: More Joel on Software
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ItemLinks:
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ItemLink:
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-
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Description: Add To Wishlist
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-
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Description: Tell A Friend
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-
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Description: All Customer Reviews
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-
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Description: All Offers
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Request:
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IsValid: <span class="synConstant">'True'</span>
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ItemLookupRequest:
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Condition: New
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DeliveryMethod: Ship
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IdType: EAN
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ItemId: <span class="synConstant">9784798118925</span>
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MerchantId: Amazon
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OfferPage: <span class="synConstant">1</span>
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ResponseGroup: Small
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ReviewPage: <span class="synConstant">1</span>
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ReviewSort: -SubmissionDate
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SearchIndex: Books
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VariationPage: All
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OperationRequest:
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Arguments:
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Argument:
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-
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Name: Operation
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Value: ItemLookup
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-
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Name: Service
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Value: AWSECommerceService
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-
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Name: Version
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Value: <span class="synConstant">2009-01-01</span>
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-
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Name: SearchIndex
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Value: Books
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-
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Name: Signature
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Value: gwfPyW7fYVfp/lFxseRThAn8uSCKV4+SRj5CAAJeBws=
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-
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Name: ItemId
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Value: <span class="synConstant">9784798118925</span>
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-
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Name: IdType
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Value: EAN
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-
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Name: AWSAccessKeyId
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Value: AKIAI54BKVADN7EPRVZA
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-
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Name: Timestamp
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Value: <span class="synConstant">2009-05</span>-28T14:<span class="synConstant">46</span>:19Z
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HTTPHeaders:
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Header:
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Name: UserAgent
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Value: libwww-perl/<span class="synConstant">5.826</span>
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RequestId: 73da30ef-a5eb-4f67-bb5e-50b699de5177
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RequestProcessingTime: <span class="synConstant">0.0748140000000000</span>
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xmlns: http://webservices.amazon.co<span class="synStatement">m/</span><span class="synConstant">AWSECommerceService</span><span class="synStatement">/</span><span class="synConstant">2008-10-06</span>
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</pre>
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</div>
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