public AsyncTask DirectDownloadAsync(DirectDownloadParameter directDownloadParameter,
AsyncCallbacks <Stream> asyncCallbacks = null)
{
CheckParameter(directDownloadParameter != null, "directDownloadParameter is required");
var asyncTask = new AsyncTask();
AsyncUtils.ProcessFirstItem(DoDirectDownload(directDownloadParameter), asyncCallbacks, asyncTask);
return(asyncTask);
}
private IObservable <Stream> DoDirectDownload(DirectDownloadParameter downloadParam)
{
try
{
var result = GetOptionalBlockchainTransaction(downloadParam.TransactionHash)
.Select(transferTransaction =>
transferTransaction != null
? RetrieveProximaxMessagePayloadService.GetMessagePayload(transferTransaction,
downloadParam.AccountPrivateKey)
: null)
.SelectMany(messagePayload => GetDataByteStream(messagePayload, downloadParam.DataHash,
downloadParam.PrivacyStrategy,
downloadParam.ValidateDigest, downloadParam.Digest)).Wait();
return(Observable.Return(result));
}
catch (Exception ex)
{
return(Observable.Throw <Stream>(new DirectDownloadFailureException("Direct download failed.", ex)));
}
}
public Stream DirectDownload(DirectDownloadParameter directDownloadParameter)
{
CheckParameter(directDownloadParameter != null, "directDownloadParameter is required");
return(DoDirectDownload(directDownloadParameter).Wait());
}