public override async Task <int> Read(long position, byte[] buffer, int offset, int count, int timeout)
{
if (count == 0 || item.Length == 0)
{
return(0);
}
var timeouttime = DateTime.UtcNow.AddMilliseconds(timeout);
int red;
using (var timeoutcancel = new CancellationTokenSource(timeout))
{
if (downloader != null)
{
try
{
if (position >= item.Length)
{
Log.Error($"Expected length: {item.Length} Position to read: {position}");
}
await downloader.WaitToPosition(position, timeoutcancel.Token);
}
catch (TaskCanceledException)
{
throw new TimeoutException($"File is too big to be downloaded in time for Read: {item.Name} Downloaded: {downloader.Downloaded} Pos: {position} Downloader completed: {downloader.Task.IsCompleted}");
}
}
await readStreamSync.WaitAsync();
try
{
stream.Position = position;
if (downloader == null)
{
red = await stream.ReadAsync(buffer, offset, (int)Math.Min(count, item.Length - position));
}
else
{
red = await stream.ReadAsync(buffer, offset, (int)Math.Min(count, downloader.Downloaded - position));
}
}
finally
{
readStreamSync.Release();
}
if (red == 0)
{
throw new Exception($"Red 0 File: {filePath} Len: {item.Length} Pos: {position}");
}
return(red);
}
}
public override async Task <int> Read(long position, byte[] buffer, int offset, int count, int timeout = 1000)
{
if (count == 0 || item.Length == 0)
{
return(0);
}
if (position >= item.Length)
{
Log.Trace($"Expected length: {item.Length} Position to read: {position}");
return(0);
}
using (var timeoutcancel = new CancellationTokenSource(timeout))
{
try
{
if (downloader != null)
{
await downloader.WaitToPosition(position, timeoutcancel.Token);
}
await readStreamSync.WaitAsync(timeoutcancel.Token);
int red;
try
{
stream.Position = position;
var toread = (int)Math.Min(count, (downloader?.Downloaded ?? item.Length) - position);
if (toread < 0)
{
Log.ErrorTrace("toread less than zero:" + item.Name);
}
red = await stream.ReadAsync(buffer, offset, toread, timeoutcancel.Token);
}
finally
{
readStreamSync.Release();
}
if (red == 0)
{
throw new Exception($"Red 0 File: {filePath} Len: {item.Length} Pos: {position}");
}
return(red);
}
catch (TaskCanceledException ex)
{
throw new TimeoutException($"File is too big to be downloaded in time for Read: {item.Name} Downloaded: {downloader?.Downloaded.ToString() ?? "N/A"} Pos: {position} Downloader completed: {downloader?.Task.IsCompleted.ToString() ?? "N/A"}\r\n{ex}");
}
}
}
