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AWS SDK for JavaScriptでS3 のプライベートバケットから画像を取得する

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前提

処理

aws-sdkを読み込む

const AWS = require('aws-sdk')

インスタンス化

const s3 = new AWS.S3({
  accessKeyId: 'xxxxxxxxxxxxxxxxx', //アクセスキー
  secretAccessKey: 'xxxxxxxxxxxxxxxxx', //シークレットアクセスキー
  region: '' //リージョン
})

getObjectのパラメーターを用意

const params = {
  Bucket: "buket", //バケット名
  Key: "test.jpg", //キー
};

getObjectを実行

const s3Promise = s3.getObject(params).promise();

処理が成功したらbase64型に変換する

s3Promise.then(function(data) {
  console.log('data:image/jpg;base64' + data.Body.toString('base64'))
}).catch(function(err) {
  console.log(err);
});

全体

const AWS = require('aws-sdk')

const s3 = new AWS.S3({
  accessKeyId: '', //アクセスキー
  secretAccessKey: '', //シークレットアクセスキー
  region: '' //リージョン
})

const params = {
  Bucket: "", //バケット名
  Key: "", //キー
};

const s3Promise = s3.getObject(params).promise();
s3Promise.then(function(data) {
  console.log('data:image/jpg;base64' + data.Body.toString('base64'))
}).catch(function(err) {
  console.log(err);
});
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