async Task <byte[]> _downloadChunkBasic(byte[] indexId, uint replication)
{
var locator = generator.DeriveLocator(indexId, replication);
byte[] data;
try
{
data = await withServiceFromPool(serviceUsage.Down, async svc =>
{
var res = svc.GetBody(locator);
return(await Task.FromResult(res));
});
}
catch (Exception ex)
{
throw new ServiceException($"service failed when downloading index '{indexId.ToHexString()}' with r = {replication}", ex);
}
if (data == null)
{
throw new FileNotFoundException($"data not found for segment with index '{indexId.ToHexString()}' with r = {replication}");
}
byte[] decrypted = null;
try
{
decrypted = encryption.Decrypt(data, locator);
}
catch (Exception ex)
{
throw new InvalidDataException($"data invalid for segment with index '{indexId.ToHexString()}' with r = {replication}", ex);
}
var unpacked = OverallSegment.FromByteArray(decrypted);
return(unpacked.Data.GetDecompressed());
}
async Task <UploadResult> _uploadChunkBasic(byte[] bytes, byte[] indexId, uint replication)
{
var locator = this.generator.DeriveLocator(indexId, replication);
var compressed = bytes.GetCompressed();
var packed = new OverallSegment {
Data = compressed
};
packed.AddPadding();
var encrypted = encryption.Encrypt(packed.ToByteArray(), locator);
try
{
var ok = await withServiceFromPool(serviceUsage.Up, async svc =>
{
var randomSubject = Cryptography.GetRandomBytes(32).ToHexString();
var res = svc.Upload(new Chunk(locator, randomSubject, encrypted));
return(await Task.FromResult(res));
});
return(new UploadResult {
OK = ok, CompressedData = compressed
});
}
catch (Exception ex)
{
throw new ServiceException($"service failed when uploading index '{indexId.ToHexString()}' with r = {replication}", ex);
}
}