public MemoryStream SaveToStream()
{
MemoryStream stream = null;
string json = m_saveData.ToJSON();
//Compress the data using LZF compression
byte[] compressed = null;
using (MemoryStream compMemStream = new MemoryStream())
{
using (StreamWriter writer = new StreamWriter(compMemStream, Encoding.UTF8))
{
writer.Write(json);
writer.Close();
compressed = CLZF2.Compress(compMemStream.ToArray());
}
}
if (compressed != null)
{
byte[] encrypted = AESEncryptor.Encrypt(m_cryptoKey, m_cryptoIV, compressed);
if (encrypted != null)
{
stream = new MemoryStream();
//Write version and headers!
byte[] version = SaveUtilities.SerializeVersion(HeaderVersion);
stream.Write(version, 0, version.Length);
byte[] header = SaveUtilities.SerializeHeader(m_modifiedTime, m_deviceName, SaveUtilities.CalculateMD5Hash(encrypted), encrypted.Length);
stream.Write(header, 0, header.Length);
//Write encrypted and compressed data to stream
stream.Write(encrypted, 0, encrypted.Length);
}
}
return(stream);
}
public LoadState LoadFromStream(Stream stream)
{
LoadState state = LoadState.Corrupted;
try
{
byte[] decompressed = null;
byte[] contentBytes = null;
bool versionOkay = false;
//Check version first
int headerVersion = SaveUtilities.DeserializeVersion(stream);
if (headerVersion == -1)
{
state = LoadState.Corrupted;
}
else if (headerVersion < HeaderVersion)
{
stream = UpgradeFile(stream);
if (stream != null)
{
versionOkay = true;
}
else
{
state = LoadState.Corrupted;
}
}
else if (headerVersion > HeaderVersion)
{
state = LoadState.VersionMismatch;
}
else
{
versionOkay = true;
}
if (versionOkay)
{
if (IsValidFile(stream, ref contentBytes))
{
byte[] decrypted = AESEncryptor.Decrypt(m_cryptoKey, m_cryptoIV, contentBytes);
if (decrypted != null)
{
decompressed = CLZF2.Decompress(decrypted);
}
else
{
Debug.LogError("SaveData :: Decryption failed!");
state = LoadState.Corrupted;
}
}
else
{
Debug.LogError("SaveData :: File Corrupted!");
state = LoadState.Corrupted;
}
}
if (decompressed != null)
{
using (MemoryStream jsonMemoryStream = new MemoryStream(decompressed))
{
using (StreamReader reader = new StreamReader(jsonMemoryStream))
{
if (m_saveData.FromJSON(reader))
{
state = LoadState.OK;
}
else
{
Debug.LogWarning("Trying to load invalid JSON file at path: " + m_savePath);
state = LoadState.Corrupted;
}
}
}
}
}
catch (Exception e)
{
//TODO determine exception types and see if any are recoverable!
Debug.LogWarning("Exception when parsing file from stream");
Debug.LogWarning(e);
}
return(state);
}
