private void DownloadProgressCallback(object sender, DownloadProgressChangedEventArgs e)
{
// Displays the operation identifier, and the transfer progress.
Console.WriteLine("Downloaded {0}mbs",
((int)e.BytesReceived / 1000000)
);
string percentage = ((int)e.BytesReceived / 1000000).ToString();
if (OnFileProgress != null)
{
OnFileProgress.Invoke(this, new DownloadProgress(percentage));
}
}
private async Task CreateDownload(string url, string pathToSave, string id)
{
try
{
int fileSize = await GetFileSize(url);
var finalPathToSave = pathToSave + "\\" + Path.GetFileName(url);
using (var httpClient = new HttpClient())
{
using (var request = new HttpRequestMessage(HttpMethod.Get, url))
{
using (
Stream contentStream = await(await httpClient.SendAsync(request)).Content.ReadAsStreamAsync(),
stream = new FileStream(finalPathToSave, FileMode.Create))
{
var buffer = new byte[4096];
var downloaded = 0;
while (true)
{
var length = contentStream.Read(buffer, 0, buffer.Length);
if (length <= 0)
{
break;
}
await stream.WriteAsync(buffer, 0, length);
downloaded += length;
if (downloaded % 102400 == 0)
{
Task.Factory.StartNew(() => OnFileProgress?.Invoke(id, fileSize, downloaded)).Wait();
}
}
}
}
}
OnDownloaded?.Invoke(id);
}
catch (Exception ex)
{
OnFailed?.Invoke(id, ex);
}
ManageDownloads();
}
public void AddFileToDownloadingQueue(string fileId, string url, string pathToSave)
{
try
{
DownloadQueue.Enqueue(fileId);
var download = new Download(fileId, url, pathToSave, CreateDownload(url, pathToSave, fileId));
if (!AllDownloads.TryAdd(fileId, download))
{
throw new Exception($"An exception while adding {fileId}");
}
Task.Factory.StartNew(() => OnFileProgress?.Invoke(fileId, 0, 0)).Wait();
}
catch (Exception ex)
{
OnDownloaderException?.Invoke(ex);
}
ManageDownloads();
}
