public byte[] HashOriginalFile(IOConnectionInfo iocFile) { if (iocFile == null) { Debug.Assert(false); return(null); } // Assert only Stream sIn; try { IFileStorage fileStorage = _app.GetFileStorage(iocFile); CachingFileStorage cachingFileStorage = fileStorage as CachingFileStorage; if (cachingFileStorage != null) { string hash; cachingFileStorage.GetRemoteDataAndHash(iocFile, out hash); return(MemUtil.HexStringToByteArray(hash)); } else { sIn = fileStorage.OpenFileForRead(iocFile); } if (sIn == null) { throw new FileNotFoundException(); } } catch (Exception) { return(null); } byte[] pbHash; try { SHA256Managed sha256 = new SHA256Managed(); pbHash = sha256.ComputeHash(sIn); } catch (Exception) { Debug.Assert(false); sIn.Close(); return(null); } sIn.Close(); return(pbHash); }
public override void Run() { try { IOConnectionInfo ioc = _app.GetDb().Ioc; IFileStorage fileStorage = _app.GetFileStorage(ioc); if (!(fileStorage is CachingFileStorage)) { throw new Exception("Cannot sync a non-cached database!"); } StatusLogger.UpdateMessage(UiStringKey.SynchronizingCachedDatabase); CachingFileStorage cachingFileStorage = (CachingFileStorage)fileStorage; //download file from remote location and calculate hash: StatusLogger.UpdateSubMessage(_app.GetResourceString(UiStringKey.DownloadingRemoteFile)); string hash; MemoryStream remoteData; try { remoteData = cachingFileStorage.GetRemoteDataAndHash(ioc, out hash); } catch (FileNotFoundException) { StatusLogger.UpdateSubMessage(_app.GetResourceString(UiStringKey.RestoringRemoteFile)); cachingFileStorage.UpdateRemoteFile(ioc, _app.GetBooleanPreference(PreferenceKey.UseFileTransactions)); Finish(true, _app.GetResourceString(UiStringKey.SynchronizedDatabaseSuccessfully)); return; } //check if remote file was modified: if (cachingFileStorage.GetBaseVersionHash(ioc) != hash) { //remote file is modified if (cachingFileStorage.HasLocalChanges(ioc)) { //conflict! need to merge _saveDb = new SaveDb(_context, _app, new ActionOnFinish((success, result) => { if (!success) { Finish(false, result); } else { Finish(true, _app.GetResourceString(UiStringKey.SynchronizedDatabaseSuccessfully)); } _saveDb = null; }), false, remoteData); _saveDb.Run(); _app.GetDb().MarkAllGroupsAsDirty(); } else { //only the remote file was modified -> reload database. //note: it's best to lock the database and do a complete reload here (also better for UI consistency in case something goes wrong etc.) _app.TriggerReload(_context); Finish(true); } } else { //remote file is unmodified if (cachingFileStorage.HasLocalChanges(ioc)) { //but we have local changes -> upload: StatusLogger.UpdateSubMessage(_app.GetResourceString(UiStringKey.UploadingFile)); cachingFileStorage.UpdateRemoteFile(ioc, _app.GetBooleanPreference(PreferenceKey.UseFileTransactions)); StatusLogger.UpdateSubMessage(""); Finish(true, _app.GetResourceString(UiStringKey.SynchronizedDatabaseSuccessfully)); } else { //files are in sync: just set the result Finish(true, _app.GetResourceString(UiStringKey.FilesInSync)); } } } catch (Exception e) { Finish(false, e.Message); } }