Create a multipart upload of 1 megabyte chunks of a Buffer object.
// 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);
}
});
});
}
});