public LazyLoadingReadOnlyStream(
DownloadInternalAsync downloadInternalFunc,
GetPropertiesAsync getPropertiesFunc,
DownloadTransactionalHashingOptions hashingOptions,
bool allowModifications,
long initialLenght,
long position = 0,
int?bufferSize = default)
{
_downloadInternalFunc = downloadInternalFunc;
_getPropertiesInternalFunc = getPropertiesFunc;
_position = position;
_bufferSize = bufferSize ?? Constants.DefaultStreamingDownloadSize;
_buffer = ArrayPool <byte> .Shared.Rent(_bufferSize);
_allowBlobModifications = allowModifications;
_bufferPosition = 0;
_bufferLength = 0;
_length = initialLenght;
_bufferInvalidated = false;
// the caller to this stream cannot defer validation, as they cannot access a returned hash
if (!(hashingOptions?.Validate ?? true))
{
throw Errors.CannotDeferTransactionalHashVerification();
}
// we defer hash validation on download calls to validate in-place with our existing buffer
_hashingOptions = hashingOptions == default
? default
: new DownloadTransactionalHashingOptions
{
Algorithm = hashingOptions.Algorithm,
Validate = false
};
}
public LazyLoadingReadOnlyStream(
DownloadInternalAsync downloadInternalFunc,
GetPropertiesAsync getPropertiesFunc,
bool allowModifications,
long initialLenght,
long position = 0,
int?bufferSize = default)
{
_downloadInternalFunc = downloadInternalFunc;
_getPropertiesInternalFunc = getPropertiesFunc;
_position = position;
_bufferSize = bufferSize ?? Constants.DefaultStreamingDownloadSize;
_buffer = ArrayPool <byte> .Shared.Rent(_bufferSize);
_allowBlobModifications = allowModifications;
_bufferPosition = 0;
_bufferLength = 0;
_length = initialLenght;
_bufferInvalidated = false;
}
// TODO #27253
///// <summary>
///// Hashing options to use with <see cref="_downloadInternalFunc"/>.
///// </summary>
//private readonly DownloadTransactionalHashingOptions _hashingOptions;
public LazyLoadingReadOnlyStream(
DownloadInternalAsync downloadInternalFunc,
GetPropertiesAsync getPropertiesFunc,
// TODO #27253
//DownloadTransactionalHashingOptions hashingOptions,
bool allowModifications,
long initialLenght,
long position = 0,
int?bufferSize = default,
PredictEncryptedRangeAdjustment rangePredictionFunc = default)
{
_downloadInternalFunc = downloadInternalFunc;
_getPropertiesInternalFunc = getPropertiesFunc;
_predictEncryptedRangeAdjustment = rangePredictionFunc ?? (range => range);
_position = position;
_bufferSize = bufferSize ?? Constants.DefaultStreamingDownloadSize;
_buffer = ArrayPool <byte> .Shared.Rent(_bufferSize);
_allowBlobModifications = allowModifications;
_bufferPosition = 0;
_bufferLength = 0;
_length = initialLenght;
_bufferInvalidated = false;
// TODO #27253
// the caller to this stream cannot defer validation, as they cannot access a returned hash
//if (!(hashingOptions?.Validate ?? true))
//{
// throw Errors.CannotDeferTransactionalHashVerification();
//}
// we defer hash validation on download calls to validate in-place with our existing buffer
//_hashingOptions = hashingOptions == default
// ? default
// : new DownloadTransactionalHashingOptions
// {
// Algorithm = hashingOptions.Algorithm,
// Validate = false
// };
}
