Code to Upload file using AmazonS3Client TransferUtility

S3Uploader.cs

using System;
using System.IO;
using System.Threading.Tasks;
using Amazon.S3;
using Amazon.S3.Model;
using Amazon.S3.Transfer;

namespace AWSDemo.Models
{
    public class S3Uploader
    {
        private readonly string _bucketName;
        private readonly TransferUtility _transferUtility;

        readonly log4net.ILog _logger = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
        public S3Uploader(string bucketName, string awsAccessKeyId, string awsSecretAccessKey)
        {
            _bucketName = bucketName;
            AmazonS3Config s3Config = new AmazonS3Config();

            // Very Important: Without this, code gives error: Amazon.S3.AmazonS3Exception: The bucket you are attempting to access must be addressed using the specified endpoint. Please send all future requests to this endpoint.
            s3Config.ServiceURL = "http://s3-external-1.amazonaws.com";  // S3 is independent of Region, so set default service url

            AmazonS3Client client = new AmazonS3Client(awsAccessKeyId, awsSecretAccessKey, s3Config);
            _transferUtility = new TransferUtility(client);


        }

        public async Task UploadFile(string filePath, string toPath)
        {
            filePath = filePath.ToLower();
            toPath = toPath.ToLower();
            TransferUtilityUploadRequest request = new TransferUtilityUploadRequest()
            {
                BucketName = _bucketName,
                FilePath = filePath,
                Key = toPath
            };
            request.UploadProgressEvent += Request_UploadProgressEvent;
           await _transferUtility.UploadAsync(request);

        }

        private void Request_UploadProgressEvent(object sender, UploadProgressArgs e)
        {
            _logger.Debug($"Total Bytes: {e.TotalBytes}\t TransferredBytes:  {e.TransferredBytes}\t FilePath {e.FilePath}\t  {e.PercentDone}%");

        }

        public void UploadFile(string filePath, Stream inputStream, double contentLength, string contentType)
        {
            try
            {
                var request = new PutObjectRequest
                {
                    BucketName = _bucketName,
                    InputStream = inputStream,
                    ContentType = contentType,
                    CannedACL = S3CannedACL.PublicRead,
                    Key = filePath
                };

                var ar = _transferUtility.S3Client.PutObject((request));
               _logger.Debug(ar.ResponseMetadata);
            }
            catch (Exception ex)
            {

                _logger.Error(ex.Message, ex);
            }
        }
       

    }
}