/// <summary>
/// Handles all the basic functionality for an error (throw exception if needed and run "ErrorEncountered").
/// </summary>
/// <param name="args">The information about the error.</param>
/// <param name="err">The type the error was.</param>
/// <param name="exception">The actual exception this error is contained in.</param>
internal void HandleError(ErrorEncounteredEventArgs args, ABSaveError err, Exception exception)
{
// Call the event "ErrorEncountered" - if we aren't meant to IgnoreAllErrors.
if (!IgnoreAllErrors)
{
ErrorEncountered?.Invoke(args);
}
// If it isn't suppressed, throw an exception.
if (!SuppressedErrors.HasFlag(err))
{
throw exception;
}
}
protected void FireError(string title, string message)
{
ErrorEncountered?.Invoke(this, new ErrorEventArgs(title, message));
}
async Task StartDownloading()
{
while (toDownload.Count > 0)
{
if (IsStarted == false || IsStopped)
{
if (IsStopped)
{
break;
}
await Task.Delay(300);
continue;
}
// get next work
var work = toDownload.Dequeue();
// go through each page
for (int i = 0; i < work.PageCount; i++)
{
start:
try
{
if (IsStarted == false || IsStopped)
{
while (true)
{
if (IsStarted)
{
break;
}
await Task.Delay(300);
continue;
}
if (IsStopped)
{
break;
}
}
var uri = work.GetImageUri(work.OriginalImageUrl, i);
// determine extension
var extension = uri.Substring(uri.LastIndexOf('.') + 1).ToLower();
if (extension != "png" && extension != "gif")
{
extension = "jpg";
}
// determine download path
//var filename = GetValidFilename(work.Id.Value.ToString(), i, extension); // <--- this method get's a new filename - ignoring existing ones
var filename = $"{work.Id.Value.ToString()}_p{i}.{extension}";
var fullpath = Path.Combine(Destination, filename);
DownloadProgress?.Report(new DownloaderProgress(work, i, fullpath, 0.0, Percentage)); // report progress
// only download if image doesn't exist already
if (File.Exists(fullpath) == false)
{
// download image
byte[] buffer = null;
using (var client = new WebClient())
{
client.Headers.Add("Referer", "http://spapi.pixiv.net/");
client.Headers.Add("User-Agent", "PixivIOSApp/5.8.0");
client.UseDefaultCredentials = true;
client.DownloadProgressChanged += (a, b) =>
{
DownloadProgress?.Report(new DownloaderProgress(work, i, fullpath, b.ProgressPercentage, Percentage));
};
buffer = await client.DownloadDataTaskAsync(uri);
}
// write image
File.WriteAllBytes(fullpath, buffer);
GC.Collect();
}
DownloadedImagesCount++;
DownloadProgress?.Report(new DownloaderProgress(work, i, fullpath, 100.0, Percentage));
DownloadFinished?.Invoke(this, new Tuple <long, int>(work.Id.Value, i));
}
catch (WebException)
{
while (true)
{
// just wait and check if there is internet connection
await Task.Delay(2000);
if (MainWindow.CheckForInternetConnection())
{
break;
}
continue;
}
goto start; // oh boi, never thought I would be using this :D
}
catch (Exception ex)
{
DownloadedImagesCount++;
ErrorEncountered?.Invoke(this, new Tuple <long, int, string>(work.Id.Value, i, ex.Message));
}
}
}
IsRunning = false;
Finished?.Invoke(this, EventArgs.Empty);
}