public void GetBundleCRCInformationFromServer()
{
Debug.Log("AssetBundleInformationManager: GetBundleCRCInformation");
try
{
var request = (HttpWebRequest)HttpWebRequest.Create(AssetBundleManager.Instance.BundleServerURL + "assetbundles.crc");
request.Timeout = 5000; //5 secs timeout
Debug.Log("Request URI (CRC): " + request.RequestUri.AbsoluteUri);
using (var response = (HttpWebResponse)request.GetResponse())
{
m_realtimeToPollAgain += m_realtimeToPollAgain; // Take longer each time we call to prevent over polling.
if ((int)response.StatusCode == 200)
{
Debug.Log("AssetBundleInformationManager: LoadCRCInformation Server");
Stream dataStream = response.GetResponseStream();
StreamReader reader = new StreamReader(dataStream);
string strResponse = reader.ReadToEnd();
ParseCRCInformation(strResponse, m_serverAssetBundleCRCInformation);
//SERVER CRC INFO:
// Compare server CRC's with local CRC's for changes.
foreach (var newServerCrc in m_serverAssetBundleCRCInformation)
{
foreach (AssetBundleCRCInfo localCrc in m_localAssetBundleCRCInformation)
{
if (localCrc.m_name == newServerCrc.m_name)
{
//this is an asset bundle we already know about from local crc info
if (localCrc.m_fileSizeBytes != newServerCrc.m_fileSizeBytes || localCrc.m_CRC != newServerCrc.m_CRC)
{
Debug.Log("AssetBundleInformationManager::GetBundleCRCInformationFromServer - Detected a new version of the bundle from the server. Wiping the current file and downloading the new one.");
//the server has a file that's different from the one we have here. Wipe any copy of this file, but don't count it as a failure to load
AssetBundleLocalFileChecked.Invoke(this, new AssetBundleLocalFileCheckedEventArgs(localCrc.m_name, false, 0, newServerCrc.m_fileSizeBytes));
AssetBundleDownloadCorruptedOrBroken.Invoke(this, new AssetBundleDeleteAssetBundleFileEventArgs(localCrc.m_name, null));
AssetBundleRevokePermision.Invoke(this, new AssetBundleEventArgs(localCrc.m_name));
//no point keeping old crc info for a file we never had/couldn't load. Simply replace the crc info
int index = m_localAssetBundleCRCInformation.IndexOf(localCrc);
m_localAssetBundleCRCInformation[index] = newServerCrc;
}
//otherwise it didn't change, and we can simply continue
goto localCrcFound;
}
}
//this code is skipped if the file was found in the known assetbundle list
//unknown asset bundle, add it to the list
m_localAssetBundleCRCInformation.Add(newServerCrc);
AssetBundleLocalFileChecked.Invoke(this, new AssetBundleLocalFileCheckedEventArgs(newServerCrc.m_name, false, 0, newServerCrc.m_fileSizeBytes));
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(newServerCrc.m_name, AssetBundleDownloadState.WaitingManualPermission, null));
localCrcFound :;
}
WriteCRCInfoToDisk();
reader.Close();
HasLoadedServerCRCInfo = true;
m_AssetBundleCRCInformationThread = null;
}
else
{
Debug.LogError("AssetBundleInformationManager: GetBundleCRCInformation Failed With Response: " + response.StatusCode);
m_AssetBundleCRCInformationThread = null;
}
response.Close();
}
}
catch (WebException e)
{
if (AssetBundleManager.Instance.CurrentReachability == NetworkReachability.NotReachable)
{
Debug.LogWarning("No internet access, cannot get asset bundle data");
return;
}
m_realtimeToPollAgain += m_realtimeToPollAgain;
Debug.LogException(e);
Debug.LogError("AssetBundleInformationManager: GetBundleCRCInformationFromServer WebException " + e.ToString());
m_AssetBundleCRCInformationThread = null;
}
catch (ThreadAbortException)
{
m_realtimeToPollAgain += m_realtimeToPollAgain;
Debug.LogWarning("AssetBundleInformationManager: GetBundleCRCInformationFromServer Thread aborted. Assuming intentionally.");
}
catch (Exception e)
{
m_realtimeToPollAgain += m_realtimeToPollAgain;
Debug.LogException(e);
Debug.LogError("AssetBundleInformationManager: GetBundleCRCInformationFromServer Exception " + e.ToString());
}
}
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));
}
}
