private async Task ProcessGetSessionCmd(CommandHeader header)
{
var response = new ServerResponseWithData <Guid>();
try
{
var req = await NetworkHelper.Read <GetSessionRequest>(_networkStream, header.PayloadLength);
var client = _config.Clients.Single(x => x.Id == req.ClientId);
var folder = client.FolderEndpoints.Single(x => x.Id == req.EndpointId);
var session = SessionStorage.Instance.GetNewSession();
session.BaseDir = folder.LocalPath;
session.SyncDbDir = Path.Combine(folder.LocalPath, ".sync");
if (!Directory.Exists(session.SyncDbDir))
{
var dirInfo = Directory.CreateDirectory(session.SyncDbDir);
dirInfo.Attributes = dirInfo.Attributes | FileAttributes.Hidden;
}
session.RemovedDir = Path.Combine(session.SyncDbDir, "rem");
PathHelpers.EnsureDirExists(session.RemovedDir);
session.NewDir = Path.Combine(session.SyncDbDir, "new");
PathHelpers.EnsureDirExists(session.NewDir);
var helper = new SessionFileHelper(session.NewDir, session.RemovedDir, session.BaseDir, new StringBuilder());
session.FileHelper = helper;
response.Data = session.Id;
}
catch (Exception e)
{
response.ErrorMsg = e.ToString();
}
await CommandHelper.WriteCommandResponse(_networkStream, Commands.GetSessionCmd, response);
}
public async Task <ServerResponseWithData <T> > Send(Stream stream)
{
return(await NetworkHelper.SendReceive(stream, this));
}
private async Task ProcessCommands()
{
try
{
var cmdHeader = await NetworkHelper.ReadCommandHeader(_networkStream);
if (!ByteToCmd.TryGetValue(cmdHeader.Command, out var cmdName))
{
cmdName = "Unknown command";
}
var msg = $"Received {cmdName}";
if (cmdHeader.PayloadLength > 0)
{
msg += $" with {cmdHeader.PayloadLength} bytes of payload";
}
Msg?.Invoke(msg);
switch (cmdHeader.Command)
{
case Commands.GetSessionCmd:
await ProcessGetSessionCmd(cmdHeader);
break;
case Commands.GetSyncListCmd:
await ReturnSyncList(cmdHeader);
break;
case Commands.GetFileCmd:
await SendFileToClient(cmdHeader);
break;
case Commands.SendFileCmd:
await ReceiveFileFromClient(cmdHeader);
break;
case Commands.FinishSessionCmd:
await FinishSession(cmdHeader);
break;
case Commands.DisconnectCmd:
_connected = false;
break;
case Commands.GetIdCmd:
await ProcessGetIdCmd();
break;
case Commands.RegisterClientCmd:
await ProcessRegisterClientCmd(cmdHeader);
break;
case Commands.GetClientEndpointsCmd:
await ProcessGetClientEndpointsCmd(cmdHeader);
break;
default:
_connected = false;
break;
}
}
catch (Exception e)
{
if (_connected)
{
Debugger.Break();
_connected = false;
Console.WriteLine($"Unexpected error:\r\n{e}");
}
else
{
// client disconnected
Console.WriteLine("Unexpected error but client already disconnected, ignoring...");
}
}
}
private async Task ReturnSyncList(CommandHeader cmdHeader)
{
var remoteData = await NetworkHelper.Read <GetSyncListRequest>(_networkStream, cmdHeader.PayloadLength);
var ret = new ServerResponseWithData <SyncInfo>();
var session = SessionStorage.Instance.GetSession(remoteData.SessionId);
if (session == null)
{
ret.ErrorMsg = "Session does not exist";
}
else if (session.Expired)
{
ret.ErrorMsg = "Session has expired";
_log.AppendLine("Session has expired");
//return ret;
}
else
{
try
{
Msg?.Invoke("Scanning local folder...");
var syncDb = GetSyncDb(session.BaseDir, session.SyncDbDir, out var error);
if (syncDb == null)
{
ret.ErrorMsg = error;
Msg?.Invoke($"Failed to get sync db: {error}");
}
else
{
var syncInfo = new SyncInfo();
PathHelpers.NormalizeRelative(remoteData.Files);
Msg?.Invoke("Preparing sync list...");
foreach (var localFileInfo in syncDb.Files)
{
var remoteFileInfo = remoteData.Files.FirstOrDefault(remoteFile =>
remoteFile.RelativePath == localFileInfo.RelativePath);
if (remoteFileInfo == null)
{
if (localFileInfo.State != SyncFileState.Deleted)
{
syncInfo.ToDownload.Add(localFileInfo);
}
}
else
{
remoteData.Files.Remove(remoteFileInfo);
switch (remoteFileInfo.State)
{
case SyncFileState.Deleted:
if (localFileInfo.State == SyncFileState.NotChanged ||
localFileInfo.State == SyncFileState.Deleted)
{
session.FileHelper.PrepareForRemove(localFileInfo.RelativePath);
}
else if (localFileInfo.State == SyncFileState.New)
{
syncInfo.ToDownload.Add(localFileInfo);
}
else
{
var fileExt = Path.GetExtension(localFileInfo.RelativePath);
var newPath = Path.GetFileNameWithoutExtension(localFileInfo.RelativePath) + "_FromServer" + fileExt;
localFileInfo.NewRelativePath = newPath;
session.FileHelper.AddRename(localFileInfo.RelativePath, newPath);
syncInfo.ToDownload.Add(localFileInfo);
}
break;
case SyncFileState.New:
if (localFileInfo.HashStr != remoteFileInfo.HashStr)
{
var fileExt = Path.GetExtension(remoteFileInfo.RelativePath);
var newPath = Path.GetFileNameWithoutExtension(remoteFileInfo.RelativePath) + "_FromClient" + fileExt;
remoteFileInfo.NewRelativePath = newPath;
syncInfo.ToUpload.Add(remoteFileInfo);
fileExt = Path.GetExtension(localFileInfo.RelativePath);
newPath = Path.GetFileNameWithoutExtension(localFileInfo.RelativePath) + "_FromServer" + fileExt;
localFileInfo.NewRelativePath = newPath;
session.FileHelper.AddRename(localFileInfo.RelativePath, newPath);
syncInfo.ToDownload.Add(localFileInfo);
}
break;
case SyncFileState.Modified:
if (localFileInfo.State == SyncFileState.NotChanged)
{
syncInfo.ToUpload.Add(localFileInfo);
}
else if (localFileInfo.State == SyncFileState.Modified ||
localFileInfo.State == SyncFileState.New)
{
var fileExt = Path.GetExtension(remoteFileInfo.RelativePath);
var newPath = Path.GetFileNameWithoutExtension(remoteFileInfo.RelativePath) + "_FromClient" + fileExt;
remoteFileInfo.NewRelativePath = newPath;
syncInfo.ToUpload.Add(remoteFileInfo);
fileExt = Path.GetExtension(localFileInfo.RelativePath);
newPath = Path.GetFileNameWithoutExtension(localFileInfo.RelativePath) + "_FromServer" + fileExt;
localFileInfo.NewRelativePath = newPath;
session.FileHelper.AddRename(localFileInfo.RelativePath, newPath);
syncInfo.ToDownload.Add(localFileInfo);
}
else if (localFileInfo.State == SyncFileState.Deleted)
{
var fileExt = Path.GetExtension(remoteFileInfo.RelativePath);
var newPath = Path.GetFileNameWithoutExtension(remoteFileInfo.RelativePath) + "_FromClient" + fileExt;
remoteFileInfo.NewRelativePath = newPath;
syncInfo.ToUpload.Add(remoteFileInfo);
}
break;
case SyncFileState.NotChanged:
if (localFileInfo.State == SyncFileState.Modified)
{
syncInfo.ToDownload.Add(localFileInfo);
}
else if (localFileInfo.State == SyncFileState.Deleted)
{
syncInfo.ToRemove.Add(remoteFileInfo);
}
else if (localFileInfo.State == SyncFileState.New)
{
if (localFileInfo.HashStr == remoteFileInfo.HashStr)
{
Msg?.Invoke("Skip identical file, client already has one");
localFileInfo.State = SyncFileState.NotChanged;
}
else
{
Debugger.Break(); // not possible
throw new InvalidOperationException("Invalid server state");
}
}
break;
}
}
}
foreach (var remoteFileInfo in remoteData.Files.Where(x => x.State != SyncFileState.Deleted))
{
syncInfo.ToUpload.Add(remoteFileInfo);
}
ret.Data = syncInfo;
session.SyncDb = syncDb;
session.LastAccessTime = DateTime.Now;
}
}
catch (Exception e)
{
ret.ErrorMsg = e.Message;
}
}
await CommandHelper.WriteCommandResponse(_networkStream, Commands.GetSyncListCmd, ret);
}
