private async Task SendFileToClient(CommandHeader cmdHeader)
{
var data = await NetworkHelper.Read <GetFileRequest>(_networkStream, cmdHeader.PayloadLength);
var ret = new ServerResponseWithData <long>();
var session = SessionStorage.Instance.GetSession(data.SessionId);
if (session == null)
{
ret.ErrorMsg = "Session does not exist";
}
else if (session.Expired)
{
ret.ErrorMsg = "Session has expired";
//Log?.Invoke("Session has expired");
//return ret;
}
else
{
data.RelativeFilePath = PathHelpers.NormalizeRelative(data.RelativeFilePath);
Msg?.Invoke($"Sending '{data.RelativeFilePath}'");
var filePath = Path.Combine(session.BaseDir, data.RelativeFilePath);
var fileLength = new FileInfo(filePath).Length;
ret.Data = fileLength;
await CommandHelper.WriteCommandResponse(_networkStream, data.Command, ret);
await NetworkHelper.WriteFromFileAndHashAsync(_networkStream, filePath, (int)fileLength);
session.LastAccessTime = DateTime.Now;
}
}
private async Task ReceiveFileFromClient(CommandHeader cmdHeader)
{
var request = await NetworkHelper.Read <SendFileRequest>(_networkStream, cmdHeader.PayloadLength);
var ret = new ServerResponse();
var session = SessionStorage.Instance.GetSession(request.SessionId);
if (session == null)
{
ret.ErrorMsg = "Session does not exist";
}
else if (session.Expired)
{
ret.ErrorMsg = "Session has expired";
Msg?.Invoke("Session has expired");
}
await CommandHelper.WriteCommandResponse(_networkStream, request.Command, ret);
if (!ret.HasError && session != null)
{
request.RelativeFilePath = PathHelpers.NormalizeRelative(request.RelativeFilePath);
var filePath = Path.Combine(session.NewDir, request.RelativeFilePath);
var fileDir = Path.GetDirectoryName(filePath);
PathHelpers.EnsureDirExists(fileDir);
Msg?.Invoke($"Receiving file '{request.RelativeFilePath}'");
var newHash = await NetworkHelper.ReadToFileAndHashAsync(_networkStream, filePath, request.FileLength);
var hashString = newHash.ToHashString();
if (hashString != request.HashStr)
{
Msg?.Invoke("Receive failed, hash mismatch");
}
var fileInfo = session.SyncDb.Files.FirstOrDefault(i => i.RelativePath == request.RelativeFilePath);
if (fileInfo != null)
{
fileInfo.HashStr = hashString;
fileInfo.State = SyncFileState.NotChanged;
}
else
{
session.SyncDb.AddFile(session.BaseDir, request.RelativeFilePath, hashString);
}
session.FileHelper.AddNew(request.RelativeFilePath);
session.LastAccessTime = DateTime.Now;
}
}
private async Task FinishSession(CommandHeader cmdHeader)
{
var sessionId = await NetworkHelper.Read <Guid>(_networkStream, cmdHeader.PayloadLength);
var response = new ServerResponseWithData <SyncInfo>();
var session = SessionStorage.Instance.GetSession(sessionId);
if (session == null)
{
response.ErrorMsg = "Session does not exist";
}
else if (session.Expired)
{
response.ErrorMsg = "Session has expired";
//Log?.Invoke("Session has expired");
//return ret;
}
else
{
try
{
session.FileHelper.FinishSession();
session.SyncDb.Files.RemoveAll(x => x.State == SyncFileState.Deleted);
foreach (var f in session.SyncDb.Files.Where(x => !string.IsNullOrEmpty(x.NewRelativePath)))
{
f.RelativePath = f.NewRelativePath;
f.NewRelativePath = null;
}
foreach (var f in session.SyncDb.Files)
{
f.State = SyncFileState.NotChanged;
}
}
catch (Exception e)
{
response.ErrorMsg = e.ToString();
}
session.SyncDb.Store(session.SyncDbDir);
}
await CommandHelper.WriteCommandResponse(_networkStream, Commands.FinishSessionCmd, response);
}
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);
}
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);
}
