/// <summary>
/// Request a Download action on the targeted file.
/// </summary>
/// <param name="stream">The stream that will be written to</param>
/// <param name="cancelToken">The token to cancel the query</param>
/// <param name="progress">The progress monitor</param>
/// <param name="options">The query-specific options</param>
/// <returns>A Task</returns>
public async Task Download(Stream stream, CancellationToken cancelToken, ProgressMonitorBase progress = null, FtpOptions options = null)
{
cancelToken.ThrowIfCancellationRequested();
options = options ?? Handler.Options;
FtpWebResponse response = null;
FtpWebRequest request = null;
if (progress != null)
{
long size = -1;
if (progress.AskForSize)
{
try {
size = await GetFileSize(cancelToken);
} catch { }
}
progress.Progress = new FtpProgress(size);
progress.OnInit();
}
if (cancelToken.IsCancellationRequested)
{
cancelToken.ThrowIfCancellationRequested();
}
request = Handler.MakeRequest(cancelToken, options, Target, WebRequestMethods.Ftp.DownloadFile);
response = (FtpWebResponse)await request.GetResponseAsync();
cancelToken.ThrowIfCancellationRequested();
byte[] buffer = new byte[options.BufferSize];
int readCount = 0;
try {
using (var responseStream = response.GetResponseStream()) {
if (progress != null)
{
progress.Progress.StartRateTimer();
}
do
{
readCount = await responseStream.ReadAsync(buffer, 0, options.BufferSize, cancelToken);
await stream.WriteAsync(buffer, 0, readCount, cancelToken);
cancelToken.ThrowIfCancellationRequested();
if (progress != null)
{
progress.Progress.CurrentCount += readCount;
progress.Progress.AddToRate(readCount);
progress.Progressed();
}
} while (readCount > 0);
}
} finally {
if (progress != null)
{
progress.Progress.StopRateTimer();
}
}
}
private async Task <string> InternalUpload(UploadMode mode, Stream stream, CancellationToken cancelToken, ProgressMonitorBase progress, FtpOptions options = null)
{
cancelToken.ThrowIfCancellationRequested();
options = options ?? Handler.Options;
long size = -1;
if (progress != null)
{
if (progress.AskForSize)
{
try {
size = stream.Length;
} catch (NotSupportedException) { }
}
progress.Progress = new FtpProgress(size);
progress.OnInit();
}
byte[] buffer = new byte[options.BufferSize];
int readCount = 0;
var protocol = string.Empty;
switch (mode)
{
case UploadMode.Upload:
protocol = WebRequestMethods.Ftp.UploadFile;
break;
case UploadMode.UploadAsUnique:
protocol = WebRequestMethods.Ftp.UploadFileWithUniqueName;
break;
case UploadMode.Append:
protocol = WebRequestMethods.Ftp.AppendFile;
break;
}
;
FtpWebRequest request = Handler.MakeRequest(cancelToken, options, Target, protocol);
if (size != -1)
{
request.ContentLength = size;
}
using (var requestStream = await request.GetRequestStreamAsync()) {
cancelToken.ThrowIfCancellationRequested();
do
{
readCount = await stream.ReadAsync(buffer, 0, options.BufferSize, cancelToken);
await requestStream.WriteAsync(buffer, 0, readCount, cancelToken);
cancelToken.ThrowIfCancellationRequested();
if (progress != null)
{
progress.Progress.CurrentCount += readCount;
progress.Progressed();
}
} while (readCount > 0);
}
if (mode == UploadMode.UploadAsUnique)
{
using (var response = (FtpWebResponse)await request.GetResponseAsync()) {
cancelToken.ThrowIfCancellationRequested();
return(Path.GetFileName(response.ResponseUri.ToString()));
}
}
return(null);
}