private static byte[] SerializeManifest(FileDatabaseManifest fileDatabaseManifest, Config config)
{
using (MemoryStream serializedManifestStream = new MemoryStream(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(fileDatabaseManifest))))
using (MemoryStream compressedMemoryStream = new MemoryStream())
{
// It's very important that we dispose of the GZipStream before reading from the memory stream
using (GZipStream compressionStream = new GZipStream(compressedMemoryStream, CompressionMode.Compress, true))
{
serializedManifestStream.CopyTo(compressionStream);
}
return(EncryptionHelpers.EncryptBytes(compressedMemoryStream.ToArray(), config.EncryptionKey, config.InitializationVector));
}
}
/// <summary>
/// Initializes this file database manifest
/// </summary>
private static FileDatabaseManifest GetOrCreateFileDatabaseManifest(
BackblazeB2AuthorizationSession authorizationSession,
Config config
)
{
if (SharedFileDatabaseManifest == null)
{
lock (SharedFileDatabaseManifestLock)
{
if (SharedFileDatabaseManifest == null)
{
// Get just the file names on the server
ListFilesAction listFilesAction = ListFilesAction.CreateListFileActionForFileNames(
authorizationSession,
config.BucketID,
true
);
BackblazeB2ActionResult <BackblazeB2ListFilesResult> listFilesActionResult = listFilesAction.Execute();
if (listFilesActionResult.HasErrors)
{
throw new FailedToGetListOfFilesOnB2Exception
{
BackblazeErrorDetails = listFilesActionResult.Errors,
};
}
FileResult fileDatabaseManifestFileResult = listFilesActionResult.Result.Files
.Where(f => f.FileName.Equals(RemoteFileDatabaseManifestName, StringComparison.Ordinal))
.SingleOrDefault();
if (fileDatabaseManifestFileResult == null)
{
SharedFileDatabaseManifest = new FileDatabaseManifest
{
DataFormatVersionNumber = CurrentDatabaseDataFormatVersion,
Files = new Database.File[0]
};
}
else
{
using (MemoryStream outputStream = new MemoryStream())
using (DownloadFileAction manifestFileDownloadAction = new DownloadFileAction(
authorizationSession,
outputStream,
fileDatabaseManifestFileResult.FileID
))
{
BackblazeB2ActionResult <BackblazeB2DownloadFileResult> manifestResultOption =
manifestFileDownloadAction.Execute();
if (manifestResultOption.HasResult)
{
// Now, read string from manifest
outputStream.Flush();
SharedFileDatabaseManifest = DeserializeManifest(
outputStream.ToArray(),
config
);
}
else
{
SharedFileDatabaseManifest = new FileDatabaseManifest
{
DataFormatVersionNumber = CurrentDatabaseDataFormatVersion,
Files = new Database.File[0]
};
}
}
}
}
}
}
return(SharedFileDatabaseManifest);
}
