private async Task BackupFile(BackupItem file)
{
var totalBlocks = 0;
try
{
var stream = await agentProxy.GetStream(file.StreamGuid);
hasher.Initialize();
var dbFile = new DBFile {
Name = file.Name, Backup = backup.Id, LastWriteTime = file.LastWriteTime, Length = file.Length, Valid = false
};
currentFileId = await metaDB.AddFile(dbFile);
dbFile.Id = currentFileId;
var currentFilePos = 0L;
var buffer = new byte[1024 * 64];
BlocksManager.dbBlocks = 0;
Console.WriteLine($"{DateTime.Now} - Backup file: {file.Name}");
IList <byte[]> newbLocks;
var readCount = await stream.ReadAsync(buffer, 0, buffer.Length, ctoken);
while (readCount > 0)
{
CheckCancelStatus();
newbLocks = hasher.NextBlock(buffer, 0, readCount);
foreach (var newbLock in newbLocks)
{
CheckCancelStatus();
var blockGuid = await BlocksManager.AddBlockToDB(newbLock);
await metaDB.AddFileBlock(new DBFileBlock { Block = blockGuid, File = currentFileId, Offset = currentFilePos });
currentFilePos += newbLock.Length;
totalBlocks++;
}
readCount = await stream.ReadAsync(buffer, 0, buffer.Length, ctoken);
}
if (hasher.HasRemainingBytes)
{
var lastLock = hasher.RemainingBytes();
var blockGuid = await BlocksManager.AddBlockToDB(lastLock);
await metaDB.AddFileBlock(new DBFileBlock { Block = blockGuid, File = currentFileId, Offset = currentFilePos });
currentFilePos += lastLock.Length;
totalBlocks++;
}
dbFile.Valid = true;
await metaDB.AddFile(dbFile);
}
catch (OperationCanceledException e)
{
// re-throws OperationCanceled exceptions
throw e;
}
catch (Exception e)
{
backup.AppendLog($"Error file: {file.Name} --- {e.Message} ");
backupStatus = Status.Warning;
await metaDB.AddBackup(backup); // Update backup with error
}
Console.WriteLine($"{DateTime.Now} - Total blocks: {totalBlocks}");
Console.WriteLine($"{DateTime.Now} - DB blocks: {BlocksManager.dbBlocks}");
}