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initiateMultipartUpload.js

initiateMultipartUpload.js demonstrates how to create a multipart upload out of 1 megabyte chunks of a Buffer object

/** * Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * * This file is licensed under the Apache License, Version 2.0 (the "License"). * You may not use this file except in compliance with the License. A copy of * the License is located at * * http://aws.amazon.com/apache2.0/ * * This file 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. */ // Create a new service object and some supporting variables var glacier = new AWS.Glacier({apiVersion: '2012-06-01'}), vaultName = 'YOUR_VAULT_NAME', buffer = new Buffer(2.5 * 1024 * 1024), // 2.5MB buffer partSize = 1024 * 1024, // 1MB chunks, numPartsLeft = Math.ceil(buffer.length / partSize), startTime = new Date(), params = {vaultName: vaultName, partSize: partSize.toString()}; // Compute the complete SHA-256 tree hash so we can pass it // to completeMultipartUpload request at the end var treeHash = glacier.computeChecksums(buffer).treeHash; // Initiate the multipart upload console.log('Initiating upload to', vaultName); // Call Glacier to initiate the upload. glacier.initiateMultipartUpload(params, function (mpErr, multipart) { if (mpErr) { console.log('Error!', mpErr.stack); return; } console.log("Got upload ID", multipart.uploadId); // Grab each partSize chunk and upload it as a part for (var i = 0; i < buffer.length; i += partSize) { var end = Math.min(i + partSize, buffer.length), partParams = { vaultName: vaultName, uploadId: multipart.uploadId, range: 'bytes ' + i + '-' + (end-1) + '/*', body: buffer.slice(i, end) }; // Send a single part console.log('Uploading part', i, '=', partParams.range); glacier.uploadMultipartPart(partParams, function(multiErr, mData) { if (multiErr) return; console.log("Completed part", this.request.params.range); if (--numPartsLeft > 0) return; // complete only when all parts uploaded var doneParams = { vaultName: vaultName, uploadId: multipart.uploadId, archiveSize: buffer.length.toString(), checksum: treeHash // the computed tree hash }; console.log("Completing upload..."); glacier.completeMultipartUpload(doneParams, function(err, data) { if (err) { console.log("An error occurred while uploading the archive"); console.log(err); } else { var delta = (new Date() - startTime) / 1000; console.log('Completed upload in', delta, 'seconds'); console.log('Archive ID:', data.archiveId); console.log('Checksum: ', data.checksum); } }); }); } });

Sample Details

Service: glacier

Last tested:

Author: AWS-JSDG

Type: full-example

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