Amazon.S3.AmazonS3Client.PostObject C# (CSharp) Метод

        private void PostObject(PostObjectRequest request, AsyncOptions options, Action<AmazonWebServiceRequest, AmazonWebServiceResponse, Exception, AsyncOptions> callbackHelper)
        {
            string url;
            string subdomain = request.Region.Equals(RegionEndpoint.USEast1) ? "s3" : "s3-" + request.Region.SystemName;
            IDictionary<string, string> headers = new Dictionary<string, string>();

            if (request.Bucket.IndexOf('.') > -1)
                url = string.Format(CultureInfo.InvariantCulture, "https://{0}.amazonaws.com/{1}/", subdomain, request.Bucket);
            else
                url = string.Format(CultureInfo.InvariantCulture, "https://{0}.{1}.amazonaws.com", request.Bucket, subdomain);
            Uri uri = new Uri(url);

            IHttpRequest<string> webRequest = null;
            if (AWSConfigs.HttpClient == AWSConfigs.HttpClientOption.UnityWWW)
                webRequest = new UnityWwwRequest(uri);
            else
                webRequest = new UnityRequest(uri);

            var boundary = Convert.ToBase64String(Guid.NewGuid().ToByteArray()).Replace('=', 'z');

            headers[HeaderKeys.ContentTypeHeader] = string.Format(CultureInfo.InvariantCulture, "multipart/form-data; boundary={0}", boundary);
            headers[HeaderKeys.UserAgentHeader] = AWSSDKUtils.UserAgentHeader;

            webRequest.Method = "POST";

            using (var reqStream = new MemoryStream())
            {
                request.WriteFormData(boundary, reqStream);

                byte[] boundaryBytes = Encoding.UTF8.GetBytes(string.Format(CultureInfo.InvariantCulture, "--{0}\r\nContent-Disposition: form-data; name=\"file\"\r\n\r\n", boundary));

                reqStream.Write(boundaryBytes, 0, boundaryBytes.Length);
                using (var inputStream = null == request.Path ? request.InputStream : File.OpenRead(request.Path))
                {
                    byte[] buf = new byte[1024];
                    int bytesRead;
                    while ((bytesRead = inputStream.Read(buf, 0, 1024)) > 0)
                    {
                        reqStream.Write(buf, 0, bytesRead);
                    }
                }
                byte[] endBoundaryBytes = Encoding.UTF8.GetBytes(string.Format(CultureInfo.InvariantCulture, "\r\n--{0}--", boundary));
                reqStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
                webRequest.WriteToRequestBody(null, reqStream.ToArray(), headers);

                var callback = ((Amazon.Runtime.Internal.IAmazonWebServiceRequest)request).StreamUploadProgressCallback;
                if (callback != null)
                    webRequest.SetupProgressListeners(reqStream, 0, request, callback);
            }

            var executionContext = new AsyncExecutionContext(
                new AsyncRequestContext(this.Config.LogMetrics)
                {
                    ClientConfig = this.Config,
                    OriginalRequest = request,
                    Action = callbackHelper,
                    AsyncOptions = options,
                    IsAsync = true
                },
                new AsyncResponseContext()
            );

            webRequest.SetRequestHeaders(headers);
            executionContext.RuntimeState = webRequest;


            executionContext.ResponseContext.AsyncResult =
                       new RuntimeAsyncResult(executionContext.RequestContext.Callback,
                           executionContext.RequestContext.State);
            executionContext.ResponseContext.AsyncResult.AsyncOptions = executionContext.RequestContext.AsyncOptions;
            executionContext.ResponseContext.AsyncResult.Action = executionContext.RequestContext.Action;
            executionContext.ResponseContext.AsyncResult.Request = executionContext.RequestContext.OriginalRequest;

            webRequest.BeginGetResponse(new AsyncCallback(ProcessPostResponse), executionContext);
        }