今回の目的（Node.js SDKを使って検索してみる）
前回、Image Searchの設定と画像取り込みまで終わりました。今回は、前回作ったImage Searchにプログラムでアクセスしてみようと思います。
実装環境の構築
今回はYarnを使ってでプロジェクト作成します。Yarnの開発環境が整っていない方はインストールを行っておいてください。（サンプルはYarnで作成していますが、npmでも構いません）
参考：Windows+Scoopの場合
PS C:\Users\user> scoop install yarn
Node.js プロジェクトの作成
それでは、Node.jsのプロジェクトを作ってみましょう
プロジェクトディレクトリの作成
PS C:\Users\user\Documents> mkdir node-sample
Directory: C:\Users\user\Documents
Mode LastWriteTime Length Name
---- ------------- ------ ----
d---- 2020/05/19 15:59 node-sample
PS C:\Users\user\Documents> cd .\node-sample\
PS C:\Users\user\Documents\node-sample>
Node プロジェクトの作成
PS C:\Users\user\Documents\node-sample> yarn init
yarn init v1.22.4
question name (node-sample): alibaba-imagesearch-demo
question version (1.0.0):
question description: image search demo
question entry point (index.js):
question repository url:
question author: morozumi.h
question license (MIT):
question private:
success Saved package.json
Done in 30.04s.
PS C:\Users\user\Documents\node-sample>
PS C:\Users\user\Documents\node-sample> tree /F
フォルダー パスの一覧: ボリューム Windows
ボリューム シリアル番号は 9411-0B65 です
C:.
│ search01.jpg
│ index.js
│ package.json
│ yarn.lock
│
└─node_modules
│ .yarn-integrity
PS C:\Users\user\Documents\node-sample>
依存関係の追加
Alibaba CloudのSDKを追加します。
PS C:\Users\user\Documents\node-sample> yarn add @alicloud/pop-core
yarn add v1.22.4
info No lockfile found.
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
[4/4] Building fresh packages...
success Saved lockfile.
success Saved 10 new dependencies.
info Direct dependencies
└─ @alicloud/pop-core@1.7.9
info All dependencies
├─ @alicloud/pop-core@1.7.9
├─ @types/node@12.12.39
├─ bignumber.js@4.1.0
├─ debug@3.2.6
├─ httpx@2.2.3
├─ json-bigint@0.2.3
├─ kitx@1.3.0
├─ sax@1.2.4
├─ xml2js@0.4.23
└─ xmlbuilder@11.0.1
Done in 2.56s.
PS C:\Users\user\Documents\node-sample> yarn add @alicloud/imagesearch-2019-03-25
yarn add v1.22.4
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
[4/4] Building fresh packages...
success Saved lockfile.
success Saved 1 new dependency.
info Direct dependencies
└─ @alicloud/imagesearch-2019-03-25@1.0.0
info All dependencies
└─ @alicloud/imagesearch-2019-03-25@1.0.0
Done in 2.38s.
PS C:\Users\user\Documents\node-sample> yarn add json-to-form-data
yarn add v1.22.4
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
[4/4] Building fresh packages...
success Saved lockfile.
success Saved 1 new dependency.
info Direct dependencies
└─ json-to-form-data@1.0.0
info All dependencies
└─ json-to-form-data@1.0.0
Done in 1.78s.
PS C:\Users\user\Documents\node-sample>
前回作成したImage Searchにアクセスする
アクセスキーとシークレットキーは前回作成したものを使用します。
また、リージョンとエンドポイントについては、以下の表から設定します。今回は日本（東京）を設定します。
| リージョン | エンドポイント |
|---|---|
| シンガポール | imagesearch.ap-southeast-1.aliyuncs.com |
| 中国 (香港) | imagesearch.cn-hongkong.aliyuncs.com |
| 日本 (東京) | imagesearch.ap-northeast-1.aliyuncs.com |
| オーストラリア (シドニー) | imagesearch.ap-southeast-2.aliyuncs.com |
index.js
constClient=require('@alicloud/imagesearch-2019-03-25')constjtfd=require('json-to-form-data')constfs=require('fs')constaccessKey='XXXXXXXXXXXXXXXX'constseacretKey='YYYYYYYYYYYYYYY'constclient=newClient({accessKeyId:accessKey,accessKeySecret:seacretKey,endpoint:'http://imagesearch.ap-northeast-1.aliyuncs.com',apiVersion:'2019-03-25'})constoptions={method:'POST',"Content-Type":'application/x-www-form-urlencoded; charset=UTF-8'}constpicContent=fs.readFileSync('./search01.jpg').toString('base64')// 画像の検索constsearchRequest={InstanceName:'itemsearch',PicContent:picContent};constsearchData=jtfd(searchRequest)client.searchImage(searchData,options).then(value=>{console.log("Result: ",JSON.stringify(value,null,4));}).catch(err=>{console.log("Error Message: ",err);});result.json
{"Msg":"success","Head":{"DocsFound":11,"DocsReturn":10,"SearchTime":100},"RequestId":"A099A070-40B4-4021-9722-B8C138636FCD","Auctions":[{"CategoryId":9,"PicName":"12.jpg","CustomContent":"k1:v12,k2:v211,k3:v311","ProductId":"1011","SortExprValues":"3.07306838035583;217"},{"CategoryId":9,"PicName":"11.jpg","CustomContent":"k1:v11,k2:v210,k3:v310","ProductId":"1010","SortExprValues":"2.97270393371582;222"},{"CategoryId":9,"PicName":"09.jpg","CustomContent":"k1:v09,k2:v208,k3:v308","ProductId":"1008","SortExprValues":"2.87724995613098;238"},{"CategoryId":9,"PicName":"10.jpg","CustomContent":"k1:v10,k2:v209,k3:v309","ProductId":"1009","SortExprValues":"2.79507827758789;235"},{"CategoryId":9,"PicName":"02.jpg","CustomContent":"k1:v02,k2:v201,k3:v301","ProductId":"1001","SortExprValues":"2.67687916755676;251"},{"CategoryId":9,"PicName":"05.jpg","CustomContent":"k1:v05,k2:v204,k3:v304","ProductId":"1004","SortExprValues":"2.67470407485962;249"},{"CategoryId":9,"PicName":"06.jpg","CustomContent":"k1:v06,k2:v205,k3:v305","ProductId":"1005","SortExprValues":"2.66586232185364;254"},{"CategoryId":9,"PicName":"04.jpg","CustomContent":"k1:v04,k2:v203,k3:v303","ProductId":"1003","SortExprValues":"2.63756942749023;255"},{"CategoryId":9,"PicName":"01.jpg","CustomContent":"k1:v01,k2:v200,k3:v300","ProductId":"1000","SortExprValues":"2.57631182670593;270"},{"CategoryId":9,"PicName":"07.jpg","CustomContent":"k1:v07,k2:v206,k3:v306","ProductId":"1006","SortExprValues":"2.52564144134521;253"}],"PicInfo":{"CategoryId":9,"AllCategories":[{"Id":0,"Name":"Tops"},{"Id":1,"Name":"Dress"},{"Id":2,"Name":"Bottoms"},{"Id":3,"Name":"Bag"},{"Id":4,"Name":"Shoes"},{"Id":5,"Name":"Accessories"},{"Id":6,"Name":"Snack"},{"Id":7,"Name":"Makeup"},{"Id":8,"Name":"Bottle"},{"Id":9,"Name":"Furniture"},{"Id":20,"Name":"Toy"},{"Id":21,"Name":"Underwear"},{"Id":22,"Name":"Digital device"},{"Id":88888888,"Name":"Other"}],"Region":"140,474,36,578"},"Code":0,"Success":true}前回、管理画面から投げた結果と同じ結果が出力されました。Node.jsでも簡単に検索する事ができました。