public override void DidWriteData(NSUrlSession session, NSUrlSessionDownloadTask downloadTask, long bytesWritten, long totalBytesWritten, long totalBytesExpectedToWrite)
{
float progress = totalBytesWritten / (float)totalBytesExpectedToWrite;
Console.WriteLine(string.Format("DownloadTask: {0} progress: {1}", downloadTask.Handle.ToString(), progress));
BackgroundDownloadManager.UpdateProgress(downloadTask, progress);
}
public async Task DownloadFileAsync(Uri url, string destination)
{
this.url = url.AbsoluteUri;
if (downloadTask != null)
{
return;
}
if (session == null)
{
session = InitBackgroundSession();
}
Destination = destination;
if (!BackgroundDownloadManager.Tasks.TryGetValue(url.AbsoluteUri, out Tcs))
{
Tcs = new TaskCompletionSource <bool> ();
BackgroundDownloadManager.Tasks.Add(url.AbsoluteUri, Tcs);
using (var request = new NSUrlRequest(new NSUrl(url.AbsoluteUri))) {
downloadTask = session.CreateDownloadTask(request);
downloadTask.Resume();
}
}
BackgroundDownloadManager.AddController(this.url, this);
await Tcs.Task;
}
public override void DidCompleteWithError(NSUrlSession session, NSUrlSessionTask task, NSError error)
{
Console.WriteLine("DidCompleteWithError");
if (error != null)
{
Console.WriteLine(error.LocalizedDescription);
BackgroundDownloadManager.Failed(session, task, error);
}
else
{
Console.WriteLine("False positive");
}
}
public override void DidFinishDownloading(NSUrlSession session, NSUrlSessionDownloadTask downloadTask, NSUrl location)
{
Console.WriteLine("File downloaded in : {0}", location);
BackgroundDownloadManager.Completed(downloadTask, location);
}
internal static void UpdateProgress(string url, float progress)
{
var controllers = BackgroundDownloadManager.GetControllers(url);
controllers.ForEach(x => Device.EnsureInvokedOnMainThread(() => x.Progress = progress));
}