get-object.mjs

/*
 * MinIO Javascript Library for Amazon S3 Compatible Cloud Storage, (C) 2015 MinIO, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Note: YOUR-ACCESSKEYID, YOUR-SECRETACCESSKEY, my-bucketname and my-objectname
// are dummy values, please replace them with original values.

import * as Minio from 'minio'

const s3Client = new Minio.Client({
  endPoint: 's3.amazonaws.com',
  accessKey: 'YOUR-ACCESSKEYID',
  secretKey: 'YOUR-SECRETACCESSKEY',
})

let size = 0
// Get a full object.
const dataStream1 = await s3Client.getObject('my-bucketname', 'my-objectname')

dataStream1.on('data', function (chunk) {
  size += chunk.length
})
dataStream1.on('end', function () {
  console.log('End. Total size = ' + size)
})
dataStream1.on('error', function (e) {
  console.log(e)
})

//Get a specific version of an object
let versionedObjSize = 0
const dataStream2 = await s3Client.getObject('my-versioned-bucket', 'my-versioned-object', {
  versionId: 'my-versionId',
})

dataStream2.on('data', function (chunk) {
  versionedObjSize += chunk.length
})
dataStream2.on('end', function () {
  console.log('End. Total size = ' + versionedObjSize)
})
dataStream2.on('error', function (err) {
  console.log(err)
})