public override async Task <int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
{
int attempts = 0;
while (attempts++ < 5)
{
var uriString = _uri.ToString();
if (_stream == null)
{
_stream = await _client.StartOrResumeFtpDownload(_uri, _totalDone);
_client.EventSource.FinishedDownload(uriString);
}
try
{
// This will throw a timeout exception if the connection is interrupted.
// Will throw null exception if failed to open (start); this will also retry.
int done = await _stream.ReadAsync(buffer, offset, count, cancellationToken);
_totalDone += done;
return(done);
}
catch (Exception ex)
{
CaughtException = ex;
_client.EventSource.FailedToDownloadFile(uriString, ex.ToString());
// Close ftp resources if possible. Set instances to null to force restart.
Close();
}
}
return(0);
}
public override async Task <int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
{
var attempts = 0;
while (attempts++ < 5)
{
if (_stream == null)
{
_stream = await _client.StartOrResumeFtpDownload(_uri, _totalDone);
_client.Logger.LogInformation("Finishing download from '{FtpBlobUri}'", _uri);
}
try
{
// This will throw a timeout exception if the connection is interrupted.
// Will throw null exception if failed to open (start); this will also retry.
int done = await _stream.ReadAsync(buffer, offset, count, cancellationToken);
_totalDone += done;
return(done);
}
catch (Exception ex)
{
CaughtException = ex;
_client.Logger.LogError(0, ex, "Failed to download file after {Attempts} attempts", attempts);
// Close ftp resources and set instance to null to restart the download.
_stream?.Dispose();
_stream = null;
}
}
return(0);
}