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 cached database!");
}
StatusLogger.UpdateMessage(UiStringKey.CheckingDatabaseForChanges);
//download file from remote location and calculate hash:
StatusLogger.UpdateSubMessage(_app.GetResourceString(UiStringKey.DownloadingRemoteFile));
MemoryStream remoteData = new MemoryStream();
using (
HashingStreamEx hashingRemoteStream = new HashingStreamEx(fileStorage.OpenFileForRead(ioc), false,
new SHA256Managed()))
{
hashingRemoteStream.CopyTo(remoteData);
hashingRemoteStream.Close();
if (!MemUtil.ArraysEqual(_app.GetDb().KpDatabase.HashOfFileOnDisk, hashingRemoteStream.Hash))
{
_app.TriggerReload(_context);
Finish(true);
}
else
{
Finish(true, _app.GetResourceString(UiStringKey.RemoteDatabaseUnchanged));
}
}
}
catch (Exception e)
{
Finish(false, e.Message);
}
}
public MemoryStream GetRemoteDataAndHash(IOConnectionInfo ioc, out string hash)
{
MemoryStream remoteData = new MemoryStream();
using (var remoteStream =_cachedStorage.OpenFileForRead(ioc))
{
//note: directly copying to remoteData and hashing causes NullReferenceExceptions in FTP and with Digest auth
// -> use the temp data approach:
MemoryStream tempData = new MemoryStream();
remoteStream.CopyTo(tempData);
tempData.Position = 0;
HashingStreamEx hashingRemoteStream = new HashingStreamEx(tempData, false, new SHA256Managed());
hashingRemoteStream.CopyTo(remoteData);
hashingRemoteStream.Close();
hash = MemUtil.ByteArrayToHexString(hashingRemoteStream.Hash);
}
remoteData.Position = 0;
return remoteData;
}
