Javascript向け AWS SDK

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Classic/VPC環境で利用できます。

Javascript向け SDK for S3 API

AWS S3で提供する Javascript向け SDKを利用して NAVERクラウドプラットフォームの Object Storageを使用するユースケースです。AWS Javascript SDK 2.348.0バージョンを基準に作成されました。

SDKインストール

npm install --save aws-sdk@2.348.0

AWS Javascript SDKソース: https://github.com/aws/aws-sdk-js
関連文書: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3.html

例

参考

例で使用する accessKey、secretKeyの値には、登録した API認証キー情報を入力します。

バケットの作成

const AWS = require('aws-sdk');

const endpoint = new AWS.Endpoint('https://kr.object.ncloudstorage.com');
const region = 'kr-standard';
const access_key = 'ACCESS_KEY';
const secret_key = 'SECRET_KEY';

const S3 = new AWS.S3({
    endpoint,
    region,
    credentials: {
        accessKeyId : access_key,
        secretAccessKey: secret_key
    }
});


const bucket_name = 'sample-bucket';


(async () => {

    await S3.createBucket({
        Bucket: bucket_name,
        CreateBucketConfiguration: {}
    }).promise()

})();

バケットリストの照会

const AWS = require('aws-sdk');

const endpoint = new AWS.Endpoint('https://kr.object.ncloudstorage.com');
const region = 'kr-standard';
const access_key = 'ACCESS_KEY';
const secret_key = 'SECRET_KEY';

const S3 = new AWS.S3({
    endpoint: endpoint,
    region: region,
    credentials: {
        accessKeyId : access_key,
        secretAccessKey: secret_key
    }
});

(async () => {

    let { Buckets } = await S3.listBuckets().promise();

    for(let bucket of Buckets) {
        console.log(bucket.Name);
    }

})();

バケットの削除

const AWS = require('aws-sdk');

const endpoint = new AWS.Endpoint('https://kr.object.ncloudstorage.com');
const region = 'kr-standard';
const access_key = 'ACCESS_KEY';
const secret_key = 'SECRET_KEY';

const S3 = new AWS.S3({
    endpoint: endpoint,
    region: region,
    credentials: {
        accessKeyId : access_key,
        secretAccessKey: secret_key
    }
});



const bucket_name = 'sample-bucket';

(async () => {

    await S3.deleteBucket({
        Bucket: bucket_name
    }).promise();

})();

ファイルのアップロード

const AWS = require('aws-sdk');
const fs = require('fs');
const endpoint = new AWS.Endpoint('https://kr.object.ncloudstorage.com');
const region = 'kr-standard';
const access_key = 'ACCESS_KEY';
const secret_key = 'SECRET_KEY';


const S3 = new AWS.S3({
    endpoint: endpoint,
    region: region,
    credentials: {
        accessKeyId : access_key,
        secretAccessKey: secret_key
    }
});


const bucket_name = 'sample-bucket';
const local_file_path = '/tmp/test.txt';



(async () => {

    let object_name = 'sample-folder/';
    // create folder
    await S3.putObject({
        Bucket: bucket_name,
        Key: object_name
    }).promise();

    object_name = 'sample-object';

    // upload file
    await S3.putObject({
        Bucket: bucket_name,
        Key: object_name,
        ACL: 'public-read',
        //ACLを削除すると、全体公開されません。
        Body: fs.createReadStream(local_file_path)
    }).promise();

})();

ファイルリストの照会

const AWS = require('aws-sdk');
const endpoint = new AWS.Endpoint('https://kr.object.ncloudstorage.com');
const region = 'kr-standard';
const access_key = 'ACCESS_KEY';
const secret_key = 'SECRET_KEY';


const S3 = new AWS.S3({
    endpoint: endpoint,
    region: region,
    credentials: {
        accessKeyId : access_key,
        secretAccessKey: secret_key
    }
});

const bucket_name = 'sample-bucket';
const MAX_KEYS = 300;

var params = {
    Bucket: bucket_name,
    MaxKeys: MAX_KEYS,
    FetchOwner: true
};

(async () => {

    // List All Objects
    console.log("List All In The Bucket");
    console.log("==========================");

    while (true) {
    
        let response = await S3.listObjectsV2(params).promise();

        console.log(`IsTruncated = ${response.IsTruncated}`);
        console.log(
            `ContinuationToken = ${response.ContinuationToken ? response.ContinuationToken : null}`
        );
        console.log(
            `NextContinuationToken = ${
                response.NextContinuationToken ? response.NextContinuationToken : null
            }`
        );
        console.log(`  Object Lists`);
        for (let content of response.Contents) {
            console.log(
                `    Name = ${content.Key}, Size = ${content.Size}, Owner = ${content.Owner.ID}`
            );
        }

        if (response.IsTruncated) {
            params.ContinuationToken = response.NextContinuationToken;
        } else {
            break;
        }
        
    }

    // List Top Level Folder And Files
    params.Delimiter = "/";
    console.log("Top Level Folders And Files In The Bucket");
    console.log("==========================");

    while (true) {
    
        let response = await S3.listObjectsV2(params).promise();

        console.log(`IsTruncated = ${response.IsTruncated}`);
        console.log(
            `ContinuationToken = ${response.ContinuationToken ? response.ContinuationToken : null}`
        );
        console.log(
            `NextContinuationToken = ${
                response.NextContinuationToken ? response.NextContinuationToken : null
            }`
        );

        console.log(`  Folder Lists`);
        for (let folder of response.CommonPrefixes) {
            console.log(`    Name = ${folder.Prefix}`);
        }

        console.log(`  File Lists`);
        for (let content of response.Contents) {
            console.log(
                `    Name = ${content.Key}, Size = ${content.Size}, Owner = ${content.Owner.ID}`
            );
        }

        if (response.IsTruncated) {
            params.ContinuationToken = response.NextContinuationToken;
        } else {
            break;
        }
    }
    
})();

ファイルのダウンロード

const AWS = require('aws-sdk');
const fs = require('fs');
const endpoint = new AWS.Endpoint('https://kr.object.ncloudstorage.com');
const region = 'kr-standard';
const access_key = 'ACCESS_KEY';
const secret_key = 'SECRET_KEY';


const S3 = new AWS.S3({
    endpoint: endpoint,
    region: region,
    credentials: {
        accessKeyId : access_key,
        secretAccessKey: secret_key
    }
});

const bucket_name = 'sample-bucket';
const object_name = 'sample-object';
const local_file_path = '/tmp/test.txt';


(() => {

    let outStream = fs.createWriteStream(local_file_path);
    let inStream = S3.getObject({
        Bucket: bucket_name,
        Key: object_name
    }).createReadStream();

    inStream.pipe(outStream);
    inStream.on('end', () => {
        console.log("Download Done");
    });

})();

ファイルの削除

const AWS = require('aws-sdk');
const endpoint = new AWS.Endpoint('https://kr.object.ncloudstorage.com');
const region = 'kr-standard';
const access_key = 'ACCESS_KEY';
const secret_key = 'SECRET_KEY';


const S3 = new AWS.S3({
    endpoint: endpoint,
    region: region,
    credentials: {
        accessKeyId : access_key,
        secretAccessKey: secret_key
    }
});

const bucket_name = 'sample-bucket';

(async () => {

    // Delete Folder
    let object_name = 'sample-folder/';

    await S3.deleteObject({
        Bucket: bucket_name,
        Key: object_name
    }).promise();

    // Delete File
    object_name = 'sample-object';

    await S3.deleteObject({
        Bucket: bucket_name,
        Key: object_name
    }).promise();

})();

ACL設定

const AWS = require('aws-sdk');
const endpoint = new AWS.Endpoint('https://kr.object.ncloudstorage.com');
const region = 'kr-standard';
const access_key = 'ACCESS_KEY';
const secret_key = 'SECRET_KEY';


const S3 = new AWS.S3({
    endpoint: endpoint,
    region: region,
    credentials: {
        accessKeyId : access_key,
        secretAccessKey: secret_key
    }
});

const bucket_name = 'sample-bucket'
const object_name = 'sample-object'
const owner_id = 'test-owner-id'
const target_id = 'test-user-id'

(async () => {

    await S3.putObjectAcl({
        Bucket: bucket_name,
        Key: object_name,
        AccessControlPolicy: {
            'Grants': [
                {
                    'Grantee': {
                        'ID': owner_id,
                        'Type': 'CanonicalUser'
                    },
                    'Permission': 'FULL_CONTROL'
                },
                {
                    'Grantee': {
                        'ID': target_id,
                        'Type': 'CanonicalUser'
                    },
                    'Permission': 'READ'
                }
            ],
            'Owner': {
                'ID': owner_id
            }
        }
    }).promise();

})();

マルチパートのアップロード

注意

マルチパートのアップロードを完了しない場合、残りのファイルがバケットに残り、バケット容量に含まれて課金されます。以下の通り不完全なマルチパートのオブジェクトを削除し、不要に課金されないようにご注意ください。

Cloud Advisorから不完全なマルチパートアップロードのオブジェクトについて通知を受信
1. Cloud Advisorに関する詳細は、Cloud Advisorご利用ガイドをご確認ください。
不完全なマルチパートのオブジェクトを確認および削除
1. キャンセルされたか、完了していないマルチパートアップロード情報を照会する: ListMultipartUploads APIガイド
2. マルチパート削除: AbortMultipartUpload APIガイド

const AWS = require('aws-sdk');
const fs = require('fs');
const endpoint = new AWS.Endpoint('https://kr.object.ncloudstorage.com');
const region = 'kr-standard';
const access_key = 'ACCESS_KEY';
const secret_key = 'SECRET_KEY';

const S3 = new AWS.S3({
    endpoint: endpoint,
    region: region,
    credentials: {
        accessKeyId : access_key,
        secretAccessKey: secret_key
    }
});

const bucket_name = 'sample-bucket';
const local_file_name = '/tmp/sample.file';
const object_name = 'sample-large-object';

let options = {
    partSize: 5 * 1024 * 1024
};


(async () => {

    await S3.upload({
        Bucket: bucket_name,
        Key: object_name,
        Body: fs.createReadStream(local_file_name)
    }, options).promise();

})();

CORS(Cross-Origin Resource Sharing)設定

const AWS = require("aws-sdk");

const endpoint = new AWS.Endpoint("https://kr.object.ncloudstorage.com");
const region = "kr-standard";
const access_key = "<ACCESS_KEY>";
const secret_key = "<SECRET_KEY>";

const S3 = new AWS.S3({
  endpoint,
  region,
  credentials: {
    accessKeyId: access_key,
    secretAccessKey: secret_key,
  },
});

const bucket_name = "sample-bucket";

const params = {
  Bucket: bucket_name,
  CORSConfiguration: {
    CORSRules: [
      {
        AllowedHeaders: ["*"],
        AllowedMethods: ["GET", "PUT"],
        AllowedOrigins: ["*"],
        MaxAgeSeconds: 3000,
      },
    ],
  },
};

(async () => {
// Set CORS
  await S3.putBucketCors(params).promise();
  
// Get CORS
  const response = await S3.getBucketCors({ Bucket: bucket_name }).promise();
  console.log(JSON.stringify(response, null, 2));
})();

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Object Storage CLI

Javascript向け SDK for S3 API

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