| private Update ( ulong downloadedBytes ) : void | ||
| downloadedBytes | ulong | Number of downloaded bytes. |
| return | void | |
public void Update()
{
var target = new SftpDownloadAsyncResult(null, null);
target.Update(123);
target.Update(431);
Assert.AreEqual(431UL, target.DownloadedBytes);
}
/// <summary>
/// Begins an asynchronous file downloading into the stream.
/// </summary>
/// <param name="path">The path.</param>
/// <param name="output">The output.</param>
/// <param name="asyncCallback">The method to be called when the asynchronous write operation is completed.</param>
/// <param name="state">A user-provided object that distinguishes this particular asynchronous write request from other requests.</param>
/// <param name="downloadCallback">The download callback.</param>
/// <returns>
/// An <see cref="IAsyncResult" /> that references the asynchronous operation.
/// </returns>
/// <exception cref="ArgumentNullException"><paramref name="output" /> is <b>null</b>.</exception>
/// <exception cref="ArgumentException"><paramref name="path" /> is <b>null</b> or contains whitespace characters.</exception>
/// <exception cref="SshConnectionException">Client is not connected.</exception>
/// <exception cref="SftpPermissionDeniedException">Permission to perform the operation was denied by the remote host. <para>-or-</para> A SSH command was denied by the server.</exception>
/// <exception cref="SshException">A SSH error where <see cref="P:System.Exception.Message" /> is the message from the remote host.</exception>
/// <exception cref="ObjectDisposedException">The method was called after the client was disposed.</exception>
/// <remarks>
/// Method calls made by this method to <paramref name="output" />, may under certain conditions result in exceptions thrown by the stream.
/// </remarks>
public IAsyncResult BeginDownloadFile(string path, Stream output, AsyncCallback asyncCallback, object state, Action<ulong> downloadCallback = null)
{
CheckDisposed();
if (path.IsNullOrWhiteSpace())
throw new ArgumentException("path");
if (output == null)
throw new ArgumentNullException("output");
var asyncResult = new SftpDownloadAsyncResult(asyncCallback, state);
ExecuteThread(() =>
{
try
{
InternalDownloadFile(path, output, asyncResult, offset =>
{
asyncResult.Update(offset);
if (downloadCallback != null)
{
downloadCallback(offset);
}
});
asyncResult.SetAsCompleted(null, false);
}
catch (Exception exp)
{
asyncResult.SetAsCompleted(exp, false);
}
});
return asyncResult;
}
private void InternalDownloadFile(string path, Stream output, SftpDownloadAsyncResult asynchResult)
{
if (output == null)
throw new ArgumentNullException("output");
if (path.IsNullOrWhiteSpace())
throw new ArgumentException("path");
// Ensure that connection is established.
this.EnsureConnection();
var fullPath = this._sftpSession.GetCanonicalPath(path);
var handle = this._sftpSession.RequestOpen(fullPath, Flags.Read);
ulong offset = 0;
var data = this._sftpSession.RequestRead(handle, offset, this.BufferSize);
// Read data while available
while (data.Length > 0)
{
output.Write(data, 0, data.Length);
output.Flush();
offset += (ulong)data.Length;
// Call callback to report number of bytes read
if (asynchResult != null)
{
asynchResult.Update(offset);
}
data = this._sftpSession.RequestRead(handle, offset, this.BufferSize);
}
this._sftpSession.RequestClose(handle);
}
