private static void DownloadFileVersion2(DownloadableFile file, FileStream destination)
{
var tasks = new List<Task>();
foreach (int i in Enumerable.Range(0, file.ChunkCount))
{
int chunkIndex = i;
tasks.Add(Task.Run(async delegate
{
byte[] chunkContents;
await _concurrentDownloadSemaphore.WaitAsync();
try
{
chunkContents = await new HttpClient().GetByteArrayAsync(file.GetChunkUrl(chunkIndex));
}
finally
{
_concurrentDownloadSemaphore.Release();
}
lock (_writeLock)
destination.Write(chunkContents, 0, chunkContents.Length);
}));
}
Task.WaitAll(tasks.ToArray());
}
private static void DownloadFileVersion4(DownloadableFile file, FileStream destination)
{
var tasks = new List<Task>();
foreach (int i in Enumerable.Range(0, file.ChunkCount))
{
int chunkIndex = i;
tasks.Add(Task.Run(async delegate
{
byte[] chunkContents;
using (await SemaphoreLock.TakeAsync(_concurrentDownloadSemaphore))
chunkContents = await new HttpClient().GetByteArrayAsync(file.GetChunkUrl(chunkIndex));
using (await SemaphoreLock.TakeAsync(_fileWriteSemaphore))
destination.Write(chunkContents, 0, chunkContents.Length);
}));
}
Task.WaitAll(tasks.ToArray());
}