/// <summary>
/// Gets the data for a given blob from R-Host. Saves the data to <paramref name="filePath"/>. This
/// method adds the blob for clean up by default.
/// </summary>
/// <param name="blob">Blob from which the data is to be retrieved.</param>
/// <param name="filePath">Path to the file where the retrieved data will be written.</param>
/// <param name="doCleanUp">true to add blob upon transfer for cleanup on dispose, false to ignore it after transfer.</param>
public async Task FetchFileAsync(IRBlobInfo blob, string filePath, bool doCleanUp, IProgress <long> progress, CancellationToken cancellationToken)
{
using (RBlobStream blobStream = await RBlobStream.OpenAsync(blob, _blobService))
using (Stream fileStream = _fs.CreateFile(filePath)) {
await blobStream.CopyToAsync(fileStream, progress, cancellationToken);
}
if (doCleanUp)
{
_cleanup.Add(blob);
}
}
/// <summary>
/// Gets contents of a remote file and copies it to given stream. This method adds the blob for clean up by default.
/// </summary>
/// <param name="remoteFile"></param>
/// <param name="stream"></param>
/// <param name="doCleanUp"></param>
public async Task CopyToFileStreamAsync(string remoteFile, Stream stream, bool doCleanUp = true, IProgress <long> progress = null, CancellationToken cancellationToken = default(CancellationToken))
{
string filePath = remoteFile.ToRPath().ToRStringLiteral();
IRBlobInfo blob = new RBlobInfo(await _session.EvaluateAsync <ulong>($"rtvs:::create_blob(readBin({filePath}, 'raw', file.info({filePath})$size))", REvaluationKind.Normal, cancellationToken));
using (RBlobStream blobStream = await RBlobStream.OpenAsync(blob, _blobService, cancellationToken)) {
await blobStream.CopyToAsync(stream, progress, cancellationToken);
}
if (doCleanUp)
{
_cleanup.Add(blob);
}
}
/// <summary>
/// Sends file to R-Host by creating a new blob. This method adds the blob for clean up by default.
/// </summary>
/// <param name="filePath">Path to the file to be sent to R-Host.</param>
/// <param name="doCleanUp">
/// true to add blob created upon transfer for cleanup on dispose, false to ignore it after transfer.
/// </param>
public async Task <IRBlobInfo> SendFileAsync(string filePath, bool doCleanUp, IProgress <long> progress, CancellationToken cancellationToken)
{
IRBlobInfo blob = null;
using (RBlobStream blobStream = await RBlobStream.CreateAsync(_blobService))
using (Stream fileStream = _fs.FileOpen(filePath, FileMode.Open)){
await fileStream.CopyToAsync(blobStream, progress, cancellationToken);
blob = blobStream.GetBlobInfo();
}
if (doCleanUp)
{
_cleanup.Add(blob);
}
return(blob);
}
/// <summary>
/// Sends a block of data to R-Host by creating a new blob. This method adds the blob for clean
/// up by default.
/// </summary>
/// <param name="data">Block of data to be sent.</param>
/// <param name="doCleanUp">
/// true to add blob created upon transfer for cleanup on dispose, false to ignore it after transfer.
/// </param>
public async Task <IRBlobInfo> SendBytesAsync(byte[] data, bool doCleanUp, IProgress <long> progress, CancellationToken cancellationToken)
{
IRBlobInfo blob = null;
using (RBlobStream blobStream = await RBlobStream.CreateAsync(_blobService))
using (Stream ms = new MemoryStream(data)) {
await ms.CopyToAsync(blobStream, progress, cancellationToken);
blob = blobStream.GetBlobInfo();
}
if (doCleanUp)
{
_cleanup.Add(blob);
}
return(blob);
}
/// <summary>
/// Gets the data for a given blob from R-Host. This method adds the blob for clean up by default.
/// </summary>
/// <param name="blob">Blob from which the data is to be retrieved.</param>
/// <param name="doCleanUp">true to add blob upon transfer for cleanup on dispose, false to ignore it after transfer.</param>
public async Task <byte[]> FetchBytesAsync(IRBlobInfo blob, bool doCleanUp, IProgress <long> progress, CancellationToken cancellationToken)
{
byte[] data = null;
using (RBlobStream blobStream = await RBlobStream.OpenAsync(blob, _blobService, cancellationToken))
using (MemoryStream ms = new MemoryStream((int)blobStream.Length)) {
await blobStream.CopyToAsync(ms, progress, cancellationToken);
data = ms.ToArray();
}
if (doCleanUp)
{
_cleanup.Add(blob);
}
return(data);
}
