public override void Close()
{
if (_closed)
{
return;
}
//write file to cache:
//(note: this might overwrite local changes. It's assumed that a sync operation or check was performed before
string hash;
using (var hashingStream = new HashingStreamEx(File.Create(_cachingFileStorage.CachedFilePath(ioc)), true, new SHA256Managed()))
{
Position = 0;
CopyTo(hashingStream);
hashingStream.Close();
hash = MemUtil.ByteArrayToHexString(hashingStream.Hash);
}
File.WriteAllText(_cachingFileStorage.VersionFilePath(ioc), hash);
//update file on remote. This might overwrite changes there as well, see above.
Position = 0;
if (_cachingFileStorage.IsCached(ioc))
{
//if the file already is in the cache, it's ok if writing to remote fails.
_cachingFileStorage.TryUpdateRemoteFile(this, ioc, _useFileTransaction, hash);
}
else
{
//if not, we don't accept a failure (e.g. invalid credentials would always remain a problem)
_cachingFileStorage.UpdateRemoteFile(this, ioc, _useFileTransaction, hash);
}
base.Close();
_closed = true;
}
public void CommitWrite()
{
_committed = true;
_memoryStream.Close();
//write file to cache:
//(note: this might overwrite local changes. It's assumed that a sync operation or check was performed before
byte[] output = _memoryStream.ToArray();
string hash;
using (var hashingStream = new HashingStreamEx(File.Create(_cachingFileStorage.CachedFilePath(_ioc)), true, new SHA256Managed()))
{
hashingStream.Write(output, 0, output.Length);
hashingStream.Close();
hash = MemUtil.ByteArrayToHexString(hashingStream.Hash);
}
File.WriteAllText(_cachingFileStorage.VersionFilePath(_ioc), hash);
//create another memory stream which is open for reading again
MemoryStream openMemStream = new MemoryStream(output);
//update file on remote. This might overwrite changes there as well, see above.
if (_cachingFileStorage.IsCached(_ioc))
{
//if the file already is in the cache, it's ok if writing to remote fails.
_cachingFileStorage.TryUpdateRemoteFile(openMemStream, _ioc, _useFileTransaction, hash);
}
else
{
//if not, we don't accept a failure (e.g. invalid credentials would always remain a problem)
_cachingFileStorage.UpdateRemoteFile(openMemStream, _ioc, _useFileTransaction, hash);
}
openMemStream.Dispose();
}