/// <summary>
/// Report progress
/// </summary>
/// <param name="progress"></param>
private void ReportProgress(DownloadProgess progress)
{
this.TotalBytesRead = progress.TotalBytesDownloaded;
this.PercentCompleted = progress.Percent;
if (this.Status != progress.DownloadStatus)
{
this.Status = progress.DownloadStatus;
}
this.DownloadSpeedBytesPerSecond = progress.DownloadSpeedBytesPerSecond;
if (!networkSpeedInitialized)
{
this.InitializeNetworkSpeedPlot();
}
this.UpdateNetworkSpeedPlot();
}
/// <summary>
/// Download file async
/// </summary>
/// <param name="url">The url</param>
/// <param name="targetPath">The target path</param>
/// <param name="progress">Progess changed handler</param>
/// <param name="token">The cancellation tocken.</param>
/// <returns></returns>
public async Task DownloadFileAsync(Uri url, string localFile, IProgress <DownloadProgess> progress, CancellationToken cancellationToken)
{
int bytesRead = default(int);
long totalBytesRead = default(long);
double percent = default(double);
Stopwatch sw = new Stopwatch();
long start = default(long);
try
{
// Check local dir
this.CheckTargetDir(Path.GetDirectoryName(localFile));
// Get file size from server
long fileSize = await GetFileSizeAsync(url);
FtpWebRequest request = this.CreateFtpWebRequest(url, WebRequestMethods.Ftp.DownloadFile);
using (FtpWebResponse response = (FtpWebResponse)await request.GetResponseAsync())
{
sw.Start();
start = sw.ElapsedMilliseconds;
Stream data = response.GetResponseStream();
System.Diagnostics.Debug.WriteLine($"Downloading {url.AbsoluteUri} to {localFile}...");
byte[] byteBuffer = new byte[8 * 1024];
using (FileStream output = new FileStream(localFile, FileMode.OpenOrCreate, FileAccess.ReadWrite,
FileShare.ReadWrite, 8 * 1024, useAsync: true))
{
if (File.Exists(localFile))
{
var fi = new FileInfo(localFile);
totalBytesRead = fi.Length;
}
do
{
bytesRead = await data.ReadAsync(byteBuffer, 0, byteBuffer.Length);
if (bytesRead > 0)
{
// Report progress
totalBytesRead += bytesRead;
if (totalBytesRead > 0)
{
if (progress != null)
{
if (sw.ElapsedMilliseconds - start >= uiUpdateIntervall)
{
start = sw.ElapsedMilliseconds;
DownloadProgess args = new DownloadProgess();
args.DownloadStatus = DownloadStatus.Transferring;
args.Percent = (totalBytesRead <= 0) ? default(double) : ((double)totalBytesRead / (double)fileSize);
args.TotalBytesDownloaded = totalBytesRead;
progress.Report(args);
}
}
}
await output.WriteAsync(byteBuffer, 0, bytesRead, cancellationToken);
}
}while (bytesRead > 0);
}
sw.Stop();
sw.Reset();
progress.Report(new DownloadProgess()
{
Percent = percent, TotalBytesDownloaded = totalBytesRead, DownloadStatus = DownloadStatus.Finished
});
System.Diagnostics.Debug.WriteLine($"Downloaded {url.AbsoluteUri} to {localFile}");
}
}
catch (OperationCanceledException)
{
System.Diagnostics.Debug.WriteLine("Download cancelled!");
progress.Report(new DownloadProgess()
{
Percent = percent, TotalBytesDownloaded = totalBytesRead, DownloadStatus = DownloadStatus.Stopped
});
}
catch (WebException e)
{
progress.Report(new DownloadProgess()
{
Percent = percent, TotalBytesDownloaded = totalBytesRead, DownloadStatus = DownloadStatus.Failed
});
System.Diagnostics.Debug.WriteLine($"Failed to download {url.AbsoluteUri} to {localFile}");
System.Diagnostics.Debug.WriteLine(e);
throw;
}
finally
{
sw.Stop();
sw.Reset();
}
}
/// <summary>
/// Download file
/// </summary>
/// <param name="url">The url</param>
/// <param name="targetPath">The target path</param>
/// <param name="progress">Progess changed handler</param>
/// <param name="token">The cancellation token.</param>
/// <returns></returns>
public void DownloadFile(Uri url, string localFile, IProgress <DownloadProgess> progress, CancellationToken cancelToken)
{
int bytesRead = default(int);
long totalBytesRead = default(long);
double percent = default(double);
long fileSize = default(long);
Stopwatch sw = new Stopwatch();
long lastUpdatedTime = default(long);
long lastUpdateDownloadedSize = default(long);
try
{
// Check local dir
this.CheckTargetDir(Path.GetDirectoryName(localFile));
// Get file size from server
fileSize = GetFileSize(url);
FtpWebRequest request = this.CreateFtpWebRequest(url, WebRequestMethods.Ftp.DownloadFile);
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
{
sw.Start();
lastUpdatedTime = sw.ElapsedMilliseconds;
using (Stream data = response.GetResponseStream())
{
System.Diagnostics.Debug.WriteLine($"Downloading {url.AbsoluteUri} to {localFile}...");
byte[] byteBuffer = new byte[8 * 1024];
using (FileStream output = new FileStream(localFile, FileMode.OpenOrCreate, FileAccess.ReadWrite,
FileShare.ReadWrite, 8 * 1024, useAsync: true))
{
totalBytesRead = output.Length;
do
{
bytesRead = data.Read(byteBuffer, 0, byteBuffer.Length);
if (bytesRead > 0)
{
totalBytesRead += bytesRead;
if (progress != null)
{
// Report progress
if (sw.ElapsedMilliseconds - lastUpdatedTime >= uiUpdateIntervall)
{
//System.Diagnostics.Debug.WriteLine($"{DateTime.Now}: Updated UI");
DownloadProgess args = new DownloadProgess();
args.DownloadStatus = DownloadStatus.Transferring;
args.Percent = (totalBytesRead <= 0) ? default(double) : ((double)totalBytesRead / (double)fileSize);
args.TotalBytesDownloaded = totalBytesRead;
args.ElapsedTime = sw.Elapsed;
// Calculate speed (Bytes per Second)
long sizeDiff = totalBytesRead - lastUpdateDownloadedSize;
lastUpdateDownloadedSize = totalBytesRead;
args.DownloadSpeedBytesPerSecond = sizeDiff / TimeSpan.FromMilliseconds(sw.ElapsedMilliseconds - lastUpdatedTime).Seconds;
// Set last updated time
lastUpdatedTime = sw.ElapsedMilliseconds;
// Report progress
progress.Report(args);
}
}
output.Write(byteBuffer, 0, bytesRead);
}
}while (bytesRead > 0 && !cancelToken.IsCancellationRequested);
}
sw.Stop();
var downloadProgress = new DownloadProgess()
{
Percent = percent, TotalBytesDownloaded = totalBytesRead, ElapsedTime = sw.Elapsed
};
if (cancelToken.IsCancellationRequested)
{
downloadProgress.DownloadStatus = DownloadStatus.Cancelled;
}
else
{
downloadProgress.DownloadStatus = DownloadStatus.Finished;
this.OnFileDownloadCompleted(new FileDownloadCompletedEventArgs(url, new FileInfo(localFile)));
}
progress.Report(downloadProgress);
System.Diagnostics.Debug.WriteLine($"Downloaded {url.AbsoluteUri} to {localFile}");
}
}
}
catch (OperationCanceledException)
{
System.Diagnostics.Debug.WriteLine("Download cancelled!");
progress.Report(new DownloadProgess()
{
Percent = percent, TotalBytesDownloaded = totalBytesRead, DownloadStatus = DownloadStatus.Stopped
});
}
catch (WebException e)
{
progress.Report(new DownloadProgess()
{
Percent = percent, TotalBytesDownloaded = totalBytesRead, DownloadStatus = DownloadStatus.Failed
});
System.Diagnostics.Debug.WriteLine($"Failed to download {url.AbsoluteUri} to {localFile}");
System.Diagnostics.Debug.WriteLine(e);
//throw;
}
finally
{
sw.Stop();
sw.Reset();
}
}
