/// <summary>
/// Gets the information about the file.
/// </summary>
public void GetFileInfo(RelativePath relativePath,
out bool fileExists, out DateTime fileAge, out long fileLength)
{
RestoreConnection();
DataPacket request = CreateRequest(FunctionID.GetFileInfo);
int index = ArgumentIndex;
CopyFileName(relativePath.GetDirectoryID(), relativePath.Path, outBuf, ref index);
request.BufferLength = index;
SendRequest(request);
ReceiveResponse(request);
index = ArgumentIndex;
fileExists = GetBool(inBuf, ref index);
fileAge = GetTime(inBuf, ref index);
fileLength = GetInt64(inBuf, ref index);
}
/// <summary>
/// Uploads the file.
/// </summary>
public void UploadFile(string srcFileName, RelativePath destPath, out bool fileAccepted)
{
if (!File.Exists(srcFileName))
{
throw new ScadaException(CommonPhrases.FileNotFound);
}
RestoreConnection();
using (FileStream stream =
new FileStream(srcFileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
// request permission to upload file
const int FileDataIndex = ArgumentIndex + 9;
const int BlockCapacity = BufferLenght - FileDataIndex;
long bytesToReadTotal = stream.Length;
int blockCount = (int)Math.Ceiling((double)bytesToReadTotal / BlockCapacity);
DataPacket request = CreateRequest(FunctionID.UploadFile);
int index = ArgumentIndex;
CopyInt32(0, outBuf, ref index);
CopyInt32(blockCount, outBuf, ref index);
CopyFileName(destPath.GetDirectoryID(), destPath.Path, outBuf, ref index);
request.BufferLength = index;
SendRequest(request);
ReceiveResponse(request);
fileAccepted = inBuf[ArgumentIndex] > 0;
// upload file
if (fileAccepted)
{
int blockNumber = 0;
long bytesReadTotal = 0;
bool endOfFile = false;
request = null;
while (!endOfFile)
{
// read from file
int bytesToRead = (int)Math.Min(bytesToReadTotal - bytesReadTotal, BlockCapacity);
int bytesRead = stream.Read(outBuf, FileDataIndex, bytesToRead);
bytesReadTotal += bytesRead;
endOfFile = bytesRead < bytesToRead || bytesReadTotal == bytesToReadTotal;
// send data
request = CreateRequest(FunctionID.UploadFile, 0, false);
index = ArgumentIndex;
CopyInt32(++blockNumber, outBuf, ref index);
CopyBool(endOfFile, outBuf, ref index);
CopyInt32(bytesRead, outBuf, ref index);
request.BufferLength = FileDataIndex + bytesRead;
SendRequest(request);
OnProgress(blockNumber, blockCount);
}
if (request != null)
{
ReceiveResponse(request);
}
}
}
}
/// <summary>
/// Downloads the file.
/// </summary>
public void DownloadFile(RelativePath relativePath, long offset, int count, bool readFromEnd,
DateTime newerThan, Func <Stream> createStreamFunc,
out DateTime fileAge, out FileReadingResult readingResult, out Stream stream)
{
if (createStreamFunc == null)
{
throw new ArgumentNullException(nameof(createStreamFunc));
}
RestoreConnection();
DataPacket request = CreateRequest(FunctionID.DownloadFile);
int index = ArgumentIndex;
CopyFileName(relativePath.GetDirectoryID(), relativePath.Path, outBuf, ref index);
CopyInt64(offset, outBuf, ref index);
CopyInt32(count, outBuf, ref index);
CopyBool(readFromEnd, outBuf, ref index);
CopyTime(newerThan, outBuf, ref index);
request.BufferLength = index;
SendRequest(request);
int prevBlockNumber = 0;
fileAge = DateTime.MinValue;
readingResult = FileReadingResult.Successful;
stream = null;
try
{
while (readingResult == FileReadingResult.Successful)
{
ReceiveResponse(request);
index = ArgumentIndex;
int blockNumber = GetInt32(inBuf, ref index);
int blockCount = GetInt32(inBuf, ref index);
fileAge = GetTime(inBuf, ref index);
readingResult = (FileReadingResult)GetByte(inBuf, ref index);
if (blockNumber != prevBlockNumber + 1)
{
ThrowBlockNumberException();
}
if (readingResult == FileReadingResult.Successful ||
readingResult == FileReadingResult.EndOfFile)
{
if (stream == null)
{
stream = createStreamFunc();
}
int bytesToWrite = GetInt32(inBuf, ref index);
stream.Write(inBuf, index, bytesToWrite);
}
prevBlockNumber = blockNumber;
OnProgress(blockNumber, blockCount);
}
}
catch
{
stream?.Dispose();
stream = null;
throw;
}
}
