private async Task DownloadAsync(DownloadItem item)
{
try {
if (!Directory.Exists(item.Directory))
{
Directory.CreateDirectory(item.Directory);
}
AdvancedWebClient client = UseResumableClient ? new ResumableWebClient() : new AdvancedWebClient();
using (client) {
if (Proxy != null)
{
client.Proxy = Proxy;
}
client.DownloadProgressChanged += (s, e) => {
item.TotalBytes = e.TotalBytesToReceive;
item.ReceivedBytes = e.BytesReceived;
};
client.SetRequest += (s, e) => {
HttpWebRequest request = e.Data;
request.Referer = item.Referer;
request.CookieContainer = Cookies;
if (!item.UserName.IsNullOrEmpty() || !item.Password.IsNullOrEmpty())
{
request.Headers.Set(AdvancedWebClient.AuthorizationHeaderName,
AdvancedWebClient.GetBasicAuthenticationHeader(item.UserName, item.Password));
}
};
item.Download();
CancellationTokenSource source = new CancellationTokenSource();
_downloadingItems[item] = source;
await client.DownloadFileAsync(item.Uri, item.FilePath, source.Token).ConfigureAwait(false);
}
if (IsDownloadedFileCorrupted(item))
{
item.Start();
}
else
{
item.Complete();
}
}
catch (OperationCanceledException) {
FileInfo file = new FileInfo(item.FilePath);
if (file.Exists)
{
item.ReceivedBytes = file.Length;
}
}
catch (Exception) {
item.Error();
}
}
private bool IsDownloadedFileCorrupted(DownloadItem item)
{
DownloadCompletingEventArgs e = new DownloadCompletingEventArgs(item);
DownloadCompleting?.Invoke(this, e);
if (e.IsCorrupted)
{
item.Error();
}
return(e.IsCorrupted);
}