Menyalin objek menggunakan unggahan multibagian

Contoh C # berikut menunjukkan cara menggunakan AWS SDK for .NET untuk menyalin objek Amazon S3 yang lebih besar dari 5 GB dari satu lokasi sumber ke lokasi lain, seperti dari satu bucket ke bucket lainnya. Untuk menyalin objek yang lebih kecil dari 5 GB, gunakan prosedur penyalinan operasi tunggal yang dijelaskan dalam Menggunakan AWS SDKs. Untuk informasi selengkapnya tentang unggahan multibagian Amazon S3, lihat Mengunggah dan menyalin objek menggunakan unggahan multibagian.

Contoh ini menunjukkan cara menyalin objek Amazon S3 yang lebih besar dari 5 GB dari satu bucket S3 ke bucket lainnya menggunakan unggahan multipart. AWS SDK for .NET API

using Amazon;
using Amazon.S3;
using Amazon.S3.Model;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace Amazon.DocSamples.S3
{
    class CopyObjectUsingMPUapiTest
    {
        private const string sourceBucket = "*** provide the name of the bucket with source object ***";
        private const string targetBucket = "*** provide the name of the bucket to copy the object to ***";
        private const string sourceObjectKey = "*** provide the name of object to copy ***";
        private const string targetObjectKey = "*** provide the name of the object copy ***";
        // Specify your bucket region (an example region is shown).
        private static readonly RegionEndpoint bucketRegion = RegionEndpoint.USWest2; 
        private static IAmazonS3 s3Client;

        public static void Main()
        {
            s3Client = new AmazonS3Client(bucketRegion);
            Console.WriteLine("Copying an object");
            MPUCopyObjectAsync().Wait();
        }
        private static async Task MPUCopyObjectAsync()
        {
            // Create a list to store the upload part responses.
            List<UploadPartResponse> uploadResponses = new List<UploadPartResponse>();
            List<CopyPartResponse> copyResponses = new List<CopyPartResponse>();

            // Setup information required to initiate the multipart upload.
            InitiateMultipartUploadRequest initiateRequest =
                new InitiateMultipartUploadRequest
                {
                    BucketName = targetBucket,
                    Key = targetObjectKey
                };

            // Initiate the upload.
            InitiateMultipartUploadResponse initResponse =
                await s3Client.InitiateMultipartUploadAsync(initiateRequest);

            // Save the upload ID.
            String uploadId = initResponse.UploadId;

            try
            {
                // Get the size of the object.
                GetObjectMetadataRequest metadataRequest = new GetObjectMetadataRequest
                {
                    BucketName = sourceBucket,
                    Key = sourceObjectKey
                };

                GetObjectMetadataResponse metadataResponse =
                    await s3Client.GetObjectMetadataAsync(metadataRequest);
                long objectSize = metadataResponse.ContentLength; // Length in bytes.

                // Copy the parts.
                long partSize = 5 * (long)Math.Pow(2, 20); // Part size is 5 MB.

                long bytePosition = 0;
                for (int i = 1; bytePosition < objectSize; i++)
                {
                    CopyPartRequest copyRequest = new CopyPartRequest
                    {
                        DestinationBucket = targetBucket,
                        DestinationKey = targetObjectKey,
                        SourceBucket = sourceBucket,
                        SourceKey = sourceObjectKey,
                        UploadId = uploadId,
                        FirstByte = bytePosition,
                        LastByte = bytePosition + partSize - 1 >= objectSize ? objectSize - 1 : bytePosition + partSize - 1,
                        PartNumber = i
                    };

                    copyResponses.Add(await s3Client.CopyPartAsync(copyRequest));

                    bytePosition += partSize;
                }

                // Set up to complete the copy.
                CompleteMultipartUploadRequest completeRequest =
                new CompleteMultipartUploadRequest
                {
                    BucketName = targetBucket,
                    Key = targetObjectKey,
                    UploadId = initResponse.UploadId
                };
                completeRequest.AddPartETags(copyResponses);

                // Complete the copy.
                CompleteMultipartUploadResponse completeUploadResponse = 
                    await s3Client.CompleteMultipartUploadAsync(completeRequest);
            }
            catch (AmazonS3Exception e)
            {
                Console.WriteLine("Error encountered on server. Message:'{0}' when writing an object", e.Message);
            }
            catch (Exception e)
            {
                Console.WriteLine("Unknown encountered on server. Message:'{0}' when writing an object", e.Message);
            }
        }
    }
}