public async Task <byte[]> GetChunkBytes(VChunk chunk, CancellationToken cancellationToken)
{
var chunkPath = Path.Combine(UserSettings.Default.OutputDirectory, ".data", $"{chunk.Id}.chunk");
byte[] chunkBytes;
if (File.Exists(chunkPath))
{
chunkBytes = new byte[chunk.Size];
await using var fs = new FileStream(chunkPath, FileMode.Open, FileAccess.Read, FileShare.Read);
await fs.ReadAsync(chunkBytes, cancellationToken).ConfigureAwait(false);
}
else
{
using var response = await _client.GetAsync(chunk.GetUrl(), cancellationToken).ConfigureAwait(false);
if (response.StatusCode == HttpStatusCode.OK)
{
chunkBytes = await response.Content.ReadAsByteArrayAsync(cancellationToken).ConfigureAwait(false);
await using var fs = new FileStream(chunkPath, FileMode.Create, FileAccess.Write, FileShare.Read);
await response.Content.CopyToAsync(fs, cancellationToken).ConfigureAwait(false);
}
else
{
chunkBytes = null; // Maybe add logging?
}
}
return(chunkBytes);
}
public async ValueTask PrefetchChunk(VChunk chunk, CancellationToken cancellationToken)
{
var chunkPath = Path.Combine(UserSettings.Default.OutputDirectory, ".data", $"{chunk.Id}.chunk");
if (File.Exists(chunkPath))
{
return;
}
using var response = await _client.GetAsync(chunk.GetUrl(), cancellationToken).ConfigureAwait(false);
if (response.StatusCode == HttpStatusCode.OK)
{
await using var fileStream = new FileStream(chunkPath, FileMode.Create, FileAccess.Write, FileShare.Read);
await response.Content.CopyToAsync(fileStream, cancellationToken).ConfigureAwait(false);
}
}