AWS Upload Example with Stream

AwsController.cs

        [HttpPost, Route("api/aws/upload")]
        public async Task<IHttpActionResult> Upload()
        {
            if (!Request.Content.IsMimeMultipartContent())
                throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);

            var provider = new MultipartMemoryStreamProvider();
            await Request.Content.ReadAsMultipartAsync(provider);
            foreach (var file in provider.Contents)
            {
                var filename = file.Headers.ContentDisposition.FileName.Trim('\"');
                var buffer = await file.ReadAsByteArrayAsync();
                Stream stream = new MemoryStream(buffer);
                AwsStore store = new AwsStore();
                store.UploadTest(stream, filename);
            }

            return Ok();
        }

AwsStore.cs

    public class AwsStore
    {
        static IAmazonS3 client;

        public void UploadTest(Stream buffer, string key)
        {
            client = new AmazonS3Client(Amazon.RegionEndpoint.USWest2);
            string Bucket = "lazy-s3";
            string Key = key;
            Stream File = buffer;
            string ContentType = "text/plain";
            try
            {
                PutObjectRequest request = new PutObjectRequest
                {
                    BucketName = Bucket,
                    Key = Key,
                    ContentType = ContentType,
                    InputStream = File
                };
                PutObjectResponse response = client.PutObject(request);
                //return response;

            }
            catch (AmazonS3Exception amazonS3Exception)
            {
                if (amazonS3Exception.ErrorCode != null &&
                    (amazonS3Exception.ErrorCode.Equals("InvalidAccessKeyId")
                    ||
                    amazonS3Exception.ErrorCode.Equals("InvalidSecurity")))
                {
                    Console.WriteLine("Check the provided AWS Credentials.");
                    Console.WriteLine(
                        "For service sign up go to http://aws.amazon.com/s3");
                }
                else
                {
                    Console.WriteLine(
                        "Error occurred. Message:'{0}' when writing an object"
                        , amazonS3Exception.Message);
                }
            }
        }
    }