Uploading Large Archives Using the Amazon SDK for .NET

using System;
using System.Collections.Generic;
using System.IO;
using Amazon.Glacier;
using Amazon.Glacier.Model;
using Amazon.Runtime;

namespace glacier.amazon.com.docsamples
{
  class ArchiveUploadMPU
  {
    static string vaultName       = "examplevault";
    static string archiveToUpload = "*** Provide file name (with full path) to upload ***";
    static long partSize          = 4194304; // 4 MB.

    public static void Main(string[] args)
    {
      AmazonGlacierClient client;
      List<string> partChecksumList = new List<string>();
      try
      {
         using (client = new AmazonGlacierClient(Amazon.RegionEndpoint.USWest2)) 
        {
          Console.WriteLine("Uploading an archive.");
          string uploadId  = InitiateMultipartUpload(client);
          partChecksumList = UploadParts(uploadId, client);
          string archiveId = CompleteMPU(uploadId, client, partChecksumList);
          Console.WriteLine("Archive ID: {0}", archiveId);
        }
        Console.WriteLine("Operations successful. To continue, press Enter");
        Console.ReadKey();
      }
      catch (AmazonGlacierException e) { Console.WriteLine(e.Message); }
      catch (AmazonServiceException e) { Console.WriteLine(e.Message); }
      catch (Exception e) { Console.WriteLine(e.Message); }
      Console.WriteLine("To continue, press Enter");
      Console.ReadKey();
    }

    static string InitiateMultipartUpload(AmazonGlacierClient client)
    {
      InitiateMultipartUploadRequest initiateMPUrequest = new InitiateMultipartUploadRequest()
      {

        VaultName = vaultName,
        PartSize = partSize,
        ArchiveDescription = "Test doc uploaded using MPU."
      };

      InitiateMultipartUploadResponse initiateMPUresponse = client.InitiateMultipartUpload(initiateMPUrequest);

      return initiateMPUresponse.UploadId;
    }

    static List<string> UploadParts(string uploadID, AmazonGlacierClient client)
    {
      List<string> partChecksumList = new List<string>();
      long currentPosition = 0;
      var buffer = new byte[Convert.ToInt32(partSize)];

      long fileLength = new FileInfo(archiveToUpload).Length;
      using (FileStream fileToUpload = new FileStream(archiveToUpload, FileMode.Open, FileAccess.Read))
      {
        while (fileToUpload.Position < fileLength)
        {
          Stream uploadPartStream = GlacierUtils.CreatePartStream(fileToUpload, partSize);
          string checksum = TreeHashGenerator.CalculateTreeHash(uploadPartStream);
          partChecksumList.Add(checksum);
          // Upload part.
          UploadMultipartPartRequest uploadMPUrequest = new UploadMultipartPartRequest()
          {

            VaultName = vaultName,
            Body = uploadPartStream,
            Checksum = checksum,
            UploadId = uploadID
          };
          uploadMPUrequest.SetRange(currentPosition, currentPosition + uploadPartStream.Length - 1);
          client.UploadMultipartPart(uploadMPUrequest);

          currentPosition = currentPosition + uploadPartStream.Length;
        }
      }
      return partChecksumList;
    }

    static string CompleteMPU(string uploadID, AmazonGlacierClient client, List<string> partChecksumList)
    {
      long fileLength = new FileInfo(archiveToUpload).Length;
      CompleteMultipartUploadRequest completeMPUrequest = new CompleteMultipartUploadRequest()
      {
        UploadId = uploadID,
        ArchiveSize = fileLength.ToString(),
        Checksum = TreeHashGenerator.CalculateTreeHash(partChecksumList),
        VaultName = vaultName
      };

      CompleteMultipartUploadResponse completeMPUresponse = client.CompleteMultipartUpload(completeMPUrequest);
      return completeMPUresponse.ArchiveId;
    }
  }
}