/// <summary>
/// APPENDS found crcInfo's to the specified list.
/// </summary>
public static void ParseCRCInformation(string fileContents, List <AssetBundleCRCInfo> infos)
{
Debug.Log("ParseCRCInformation:\n" + fileContents);
string[] assetBundleLines = fileContents.Split('\n');
foreach (string assetBundle in assetBundleLines)
{
string[] infoParts = assetBundle.Split('|');
if (infoParts.Length == 3)
{
AssetBundleCRCInfo newAssetBundleCRCInfo = new AssetBundleCRCInfo();
newAssetBundleCRCInfo.m_name = infoParts[0];
newAssetBundleCRCInfo.m_CRC = UInt32.Parse(infoParts[1]);
newAssetBundleCRCInfo.m_fileSizeBytes = Int32.Parse(infoParts[2]);
int index = infos.FindIndex(x => x.m_name == infoParts[0]);
if (index >= 0)
{
infos[index] = newAssetBundleCRCInfo;
}
else
{
infos.Add(newAssetBundleCRCInfo);
}
}
// Else file is done.
}
}
public void TryGetBundleCRCInformationFromLocalFiles()
{
Debug.Log("AssetBundleInformationManager: GetBundleCRCInformationFromLocalFiles");
string crcFile = AssetBundleManager.Instance.CurrentVersionDownloadLocation + "/assetbundles.crc";
string tmpCrcFile = AssetBundleManager.Instance.CurrentVersionDownloadLocation + "/assetbundles.crc_tmp";
bool shouldLoad = false;
if (File.Exists(crcFile))
{
//cool, we have prior knowledge of assetbundles.
//we need to check all files vs the crcs and filelengths
shouldLoad = true;
}
else if (File.Exists(tmpCrcFile))
{
try
{
File.Move(tmpCrcFile, crcFile);
shouldLoad = true;
}
catch (Exception e)
{
Debug.LogException(e);
Debug.LogError("Exception while moving tmpCrcFile to crc file location. We assume no CRC info. " + e);
}
}
if (shouldLoad)
{
Debug.Log("AssetBundleInformationManager: Loading local CRC Info");
string assetBundleCRCContents = File.ReadAllText(crcFile);
try
{
ParseCRCInformation(assetBundleCRCContents, m_localAssetBundleCRCInformation);
}
catch (Exception e)
{
Debug.LogError("Failed to parse assetbundle local CRCInfo: " + e.ToString());
}
}
else
{
Debug.Log("AssetBundleInformationManager: No Local CRC Info");
}
HasLoadedLocalCRCInfo = true;
// Even if we don't have a local file by this point, we might have the includedInBuild one.
// So lets initialize bundles anyway.
// We know for sure we don't have server info here, so null is passed.
for (int i = 0; i < m_localAssetBundleCRCInformation.Count; i++)
{
AssetBundleCRCInfo localCrc = m_localAssetBundleCRCInformation[i];
CheckLocalAssetBundle(localCrc, i, null);
}
}
public void CheckLocalAssetBundle(string assetBundleName)
{
var serverCrc = TryGetCrcInfo(assetBundleName, m_serverAssetBundleCRCInformation);
for (int i = 0; i < m_localAssetBundleCRCInformation.Count; i++)
{
AssetBundleCRCInfo localCrc = m_localAssetBundleCRCInformation[i];
if (localCrc.m_name == assetBundleName)
{
CheckLocalAssetBundle(localCrc, i, serverCrc);
break;
}
}
}
public void CheckLocalAssetBundle(AssetBundleCRCInfo localCrc, int localCrcIndex, AssetBundleCRCInfo?serverCrc)
{
bool isInGame = AssetBundleManager.Instance.IsInGame;
string fullFileName = AssetBundleManager.Instance.CurrentVersionDownloadLocation + "/" + localCrc.m_name;
string tempFileName = fullFileName + ".incomplete";
FileInfo fullAssetFileInfo = new FileInfo(fullFileName);
if (fullAssetFileInfo.Exists)
{
//check filesize first
if (fullAssetFileInfo.Length == localCrc.m_fileSizeBytes)
{
if (isInGame)
{
//the file is the correct size, but CRC is slow, so we'll delay the CRC
//don't do this now!
return;
}
Debug.Log("AssetBundleInformationManager::CheckLocalAssetBundle : Completed file: " + localCrc.m_name);
//sweet, same length, it's complete, now to check CRC
uint crc = AssetBundleUtils.GenerateCRC32FromFile(fullFileName);
if (crc == localCrc.m_CRC)
{
//it's the right file, untampered.
//it's loadable.
Debug.Log("AssetBundleInformationManager::CheckLocalAssetBundle : Local Asset Bundle " + localCrc.m_name + " is Loadable. SUCCESS");
AssetBundleLocalFileChecked.Invoke(this, new AssetBundleLocalFileCheckedEventArgs(localCrc.m_name, true, localCrc.m_fileSizeBytes, localCrc.m_fileSizeBytes));
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(localCrc.m_name, AssetBundleDownloadState.Loadable, null));
AssetBundleRevokePermision.Invoke(this, new AssetBundleEventArgs(localCrc.m_name));
}
else
{
//tampered? or damaged? Delete it.
Debug.LogError("AssetBundleInformationManager::CheckLocalAssetBundle : Local Asset Bundle " + localCrc.m_name + " failed the CRC check. Deleting.");
AssetBundleDownloadCorruptedOrBroken.Invoke(this, new AssetBundleDeleteAssetBundleFileEventArgs(localCrc.m_name, "FAILED_LOCAL_CRC_CHECK"));
}
}
else
{
//it's not an incomplete dl, and it's either too big or too small, not sure how that could happen, wipe it and force a redownload
//no point crcing as the bytes are definitely different.
Debug.LogError("AssetBundleInformationManager: Local Asset Bundle " + localCrc.m_name + " failed the LENGTH check. How!? Deleting.");
AssetBundleDownloadCorruptedOrBroken.Invoke(this, new AssetBundleDeleteAssetBundleFileEventArgs(localCrc.m_name, "FAILED_LOCAL_LENGTH_CHECK"));
}
}
FileInfo tempAssetFileInfo = new FileInfo(tempFileName);
if (tempAssetFileInfo.Exists)
{
Debug.Log("AssetBundleInformationManager::CheckLocalAssetBundle : Temporary File: " + localCrc.m_name);
if (isInGame)
{
if (serverCrc.HasValue && tempAssetFileInfo.Length < serverCrc.Value.m_fileSizeBytes)
{
// We don't know what this file is, but we'll assume it's a partially downloaded NEW asset bundle and put it back in the queue
Debug.Log("AssetBundleInformationManager::CheckLocalAssetBundle : Temporary Asset Bundle " + localCrc.m_name + " failed CRC. It's small enough to feasibly be a partially-downloaded new asset bundle. Download continuing.");
AssetBundleLocalFileChecked.Invoke(this, new AssetBundleLocalFileCheckedEventArgs(serverCrc.Value.m_name, false, tempAssetFileInfo.Length, serverCrc.Value.m_fileSizeBytes));
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(serverCrc.Value.m_name, AssetBundleDownloadState.Queued, null));
}
return;
}
else
{
uint crc = AssetBundleUtils.GenerateCRC32FromFile(tempFileName);
bool crcMatchesLocal = localCrc.m_CRC == crc;
bool crcMatchesServer = serverCrc.HasValue && serverCrc.Value.m_CRC == crc;
if (crcMatchesLocal || crcMatchesServer)
{
// Crc matches either!
if (!crcMatchesLocal)
{
// The recently completed ".incomplete" file will now be moved to the final destination (oooh).
// Thus, the local CRC info needs to match the new crc.
m_localAssetBundleCRCInformation[localCrcIndex] = serverCrc.Value;
}
// The file is loadable, so move it to the right file name. Yay!
Debug.Log("AssetBundleInformationManager::CheckLocalAssetBundle : Temporary Asset Bundle " + localCrc.m_name + " matched a CRC check and is now loadable. SUCCESS." +
"\nServer: " + crcMatchesServer + ", Local: " + crcMatchesLocal);
AssetBundleFinishedAndRequiresMoving.Invoke(this, new AssetBundleEventArgs(localCrc.m_name));
}
else if (serverCrc.HasValue && tempAssetFileInfo.Length < serverCrc.Value.m_fileSizeBytes)
{
// We don't know what this file is, but we'll assume it's a partially downloaded NEW asset bundle.
Debug.Log("AssetBundleInformationManager::CheckLocalAssetBundle : Temporary Asset Bundle " + localCrc.m_name + " failed CRC. It's small enough to feasibly be a partially-downloaded new asset bundle. Download continuing.");
AssetBundleLocalFileChecked.Invoke(this, new AssetBundleLocalFileCheckedEventArgs(serverCrc.Value.m_name, false, tempAssetFileInfo.Length, serverCrc.Value.m_fileSizeBytes));
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(serverCrc.Value.m_name, AssetBundleDownloadState.Queued, null));
}
else if (HasLoadedServerCRCInfo)
{
// It failed all CRC AND we have got all server CRC's. Thus, this file must be corrupted.
Debug.LogError("AssetBundleInformationManager::CheckLocalAssetBundle : Local Asset Bundle " + localCrc.m_name + " does not match any CRC, and we have all server CRC's. Assumed corrupted.");
AssetBundleDownloadCorruptedOrBroken.Invoke(this, new AssetBundleDeleteAssetBundleFileEventArgs(localCrc.m_name, "FAILED_SERVER_CRC_CHECK"));
}
else
{
// We don't know if this is a new version, so no checks are worth doing on this until we have server info
Debug.Log("AssetBundleInformationManager::CheckLocalAssetBundle : Local Asset Bundle " + localCrc.m_name + " does not match local CRC and we do not currently have the server CRC's. " +
"It's probably a new bundle in a server CRC that we haven't downloaded for this play session yet. We'll queue it for download, pending the server CRC's.");
AssetBundleLocalFileChecked.Invoke(this, new AssetBundleLocalFileCheckedEventArgs(localCrc.m_name, false, tempAssetFileInfo.Length, localCrc.m_fileSizeBytes));
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(localCrc.m_name, AssetBundleDownloadState.WaitingManualPermission, null));
}
}
}
// CRC checking complete. Phew.
tempAssetFileInfo.Refresh();
fullAssetFileInfo.Refresh();
if (!tempAssetFileInfo.Exists && !fullAssetFileInfo.Exists)
{
// No file left after CRC checks, so the only thing to do is begin downloading afresh.
AssetBundleLocalFileChecked.Invoke(this, new AssetBundleLocalFileCheckedEventArgs(localCrc.m_name, false, 0, localCrc.m_fileSizeBytes));
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(localCrc.m_name, AssetBundleDownloadState.WaitingManualPermission, null));
}
}
