private void createNewThreadIfRequired()
{
lock (GlobalLock.Locker)
{
if (FlagStop)
{
return;
}
if (Info == null || !Info.AcceptRanges)
{
return;
}
var realNofMaxThread = Info.AcceptRanges ? NofThread : 1;
var nofCurrentThreads = (Ranges.Count(x => !x.IsIdle));
var reqThreads = realNofMaxThread - nofCurrentThreads;
if (reqThreads > 0)
{
var avRanges = Ranges.Where(x => !x.IsDownloaded);
if (avRanges.Any(x => x.IsIdle))
{
var first = avRanges.First(x => x.IsIdle);
if (first.TotalBytesReceived > 0)
{
var fstart = first.Remaining.Start;
var fend = first.Remaining.End;
first.End = fstart - 1;
var next = new HttpRange(fstart, fend, RangeDir, Guid.NewGuid().ToString("N"));
Ranges.Add(next);
var cd = CreateNewRangeDownloader(next);
cd.Download();
}
else
{
if (!first.IsIdle)
{
return;
}
var rdlist = cdList.Where(x => x.Range.FileId == first.FileId);
if (rdlist.Any())
{
var cd = rdlist.First();
if (!cd.Range.IsIdle)
{
return;
}
cd.Reset();
cd.UseChunk = this.UseChunk;
cd.Download();
}
else
{
var cd = CreateNewRangeDownloader(first);
cd.Download();
}
}
}
//10kb is for secure downloading without no corruption
//If a range < 10kb there is no dividing
else if (avRanges.Any(x => x.Remaining.Size > 10 * 1024))
{
var temp = avRanges.Where(x => x.Remaining.Size > 10 * 1024);
var first = avRanges.OrderByDescending(x => x.Remaining.Size).First();
var fstart = first.End - first.Remaining.Size / 2;
var fend = first.End;
first.End = fstart - 1;
var next = new HttpRange(fstart, fend, RangeDir, Guid.NewGuid().ToString("N"));
Ranges.Add(next);
var cd = CreateNewRangeDownloader(next);
cd.Download();
}
}
else if (reqThreads < 0)
{
var temp = cdList.Where(x => !x.Range.IsDownloaded && !x.Range.IsIdle);
if (temp.Any())
{
var first = temp.OrderByDescending(x => x.Range.Remaining.Size).First();
first.Stop();
}
}
}
}
internal HttpRangeDownloader(HttpRange range, HttpDownloadInfo info = null)
{
Range = range;
Info = info;
UseChunk = true;
}