public void StartDownloadThread(Bundle bundleInfo)
{
if (m_isApplicationQuitting)
{
return;
}
if (!ShouldDownloadWithCurrentConnection(bundleInfo))
{
return;
}
if (m_downloadThread != null && m_downloadThread.IsAlive)
{
return;
}
if (bundleInfo != null)
{
Debug.Log("AssetBundleDownloadManager. Starting Download: " + bundleInfo.assetBundleName);
m_downloadThread = new Thread(() => DoDownload(bundleInfo, AssetBundleManager.Instance.CurrentReachability));
m_downloadThread.Start();
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(bundleInfo.assetBundleName, AssetBundleDownloadState.Downloading));
}
}
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));
}
}
private void DoDownload(Bundle BundleInfo, NetworkReachability reachability)
{
Debug.Log("Download Thread Started: " + BundleInfo.assetBundleName);
NetworkReachability startingReachability = reachability;
string downloadLocation = AssetBundleManager.Instance.CurrentVersionDownloadLocation + "/" + BundleInfo.assetBundleName;
FileInfo tempFileInfo = new FileInfo(downloadLocation + ".incomplete");
FileStream saveFileStream = null;
try
{
Debug.Log("AssetBundler DoDownload " + BundleInfo.assetBundleName + " to " + AssetBundleManager.Instance.CurrentVersionDownloadLocation);
CreateDownloadDirectory();
long existingLength = 0;
if (tempFileInfo.Exists)
{
existingLength = tempFileInfo.Length;
}
else
{
//making file incomplete, to mark it for future automatic download
try
{
FileStream fs = tempFileInfo.Create();
fs.Close();
}
catch (Exception e)
{
//if we can't make a temp file, we quit. go away
Debug.LogException(e);
Debug.LogError("AssetBundler DoDownload: Critical failure in creating temp file: " + e.ToString());
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(BundleInfo.assetBundleName, AssetBundleDownloadState.Blocked, "FAILED_TO_WRITE_TO_DISK"));
return;
}
}
Debug.Log("AssetBundler DoDownload: Resuming incomplete DL. " + existingLength + " bytes downloaded already.");
string downloadURL = AssetBundleManager.Instance.BundleServerURL + BundleInfo.assetBundleName;
Debug.Log("AssetBundler DoDownload: " + downloadURL);
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(downloadURL);
request.Timeout = 5000; //5 secs timeout
request.ReadWriteTimeout = 5000;
request.AddRange((int)existingLength, (int)BundleInfo.downloadSizeBytes);
request.KeepAlive = false;
Debug.Log("Request URI: " + request.RequestUri.AbsoluteUri);
bool didComplete = false;
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
if (response.ContentLength == 0)
{
//no more to download from the server
if (existingLength >= BundleInfo.downloadSizeBytes)
{
didComplete = true;
}
else
{
throw new Exception("Error. Data on server not sufficient: " + existingLength + " bytes available, expected " + BundleInfo.downloadSizeBytes);
}
}
long serverFileSize = existingLength + response.ContentLength; //response.ContentLength gives me the size that is remaining to be downloaded
bool downloadResumable; // need it for not sending any progress
int responseCode = (int)response.StatusCode;
downloadResumable = CheckForResumeableReponseCode(BundleInfo, downloadURL, responseCode);
if (!downloadResumable)
{
existingLength = 0;
}
DownloadProgressChanged.Invoke(this, new DownloadProgressChangedEventArgs(BundleInfo.assetBundleName, existingLength, 0));
using (saveFileStream = tempFileInfo.Open(downloadResumable ? FileMode.Append : FileMode.Create, FileAccess.Write, FileShare.ReadWrite))
{
using (Stream stream = response.GetResponseStream())
{
stream.ReadTimeout = 5000;
byte[] downBuffer = new byte[4096];
long totalReceived = existingLength;
long sessionReceived = 0;
Stopwatch stopwatch = Stopwatch.StartNew();
while (totalReceived < serverFileSize)
{
#if !PRODUCTION && !PREPRODUCTION
bool paused = false;// Assets.Code.Common.DebugOptions.GetToggleValue(Assets.Code.Common.DebugToggle.downloadsPaused);
if (paused)
{
Thread.Sleep(100);
continue;
}
DebugNoInterentConnection();
DebugThrottleConnectionSpeed();
#endif
//if connection has downgraded to a non-allowed network,
//or if user has changed the current prioritised download, this pauses the download
if (startingReachability != AssetBundleManager.Instance.CurrentReachability ||
AssetBundleManager.Instance.CheckAndResetCurrentPriorityChanged() ||
AssetBundleManager.Instance.CheckAndResetDownloadTimeout())
{
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(BundleInfo.assetBundleName, AssetBundleDownloadState.Queued));
AssetBundleManager.Instance.ResetPollingTime(); //we reset the poll to start the next download immediately
stopwatch.Stop();
stream.Close();
response.Close();
saveFileStream.Close();
saveFileStream = null;
return;
}
int byteSize = stream.Read(downBuffer, 0, downBuffer.Length);
saveFileStream.Write(downBuffer, 0, byteSize);
totalReceived += byteSize;
sessionReceived += byteSize;
float currentSpeed = sessionReceived / (float)stopwatch.Elapsed.TotalSeconds;
DownloadProgressChanged.Invoke(this, new DownloadProgressChangedEventArgs(BundleInfo.assetBundleName, totalReceived, (long)currentSpeed));
}
didComplete = true;
stopwatch.Stop();
stream.Close();
}
}
response.Close();
saveFileStream.Close();
saveFileStream = null;
}
if (didComplete)
{
Debug.Log("AssetBundler DoDownload. Completed. Throwing to CRC Check.");
//download completed
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(BundleInfo.assetBundleName, AssetBundleDownloadState.CRCCheck));
AssetBundleManager.Instance.ResetPollingTime(); //we reset the poll to start the next download immediately
}
}
catch (WebException we)
{
//416 error means we requested some bytes which don't exist.
//this means the local game is expecting more data than the server has.
//in this case, the file must be finished (no more data on the server), so we throw it to a CRC check to confirm
if ((int)we.Status == 416)
{
Debug.LogWarning("AssetBundler DoDownload: Error 416. Assuming File is completed");
//this is considered an error for retry purposes
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(BundleInfo.assetBundleName, AssetBundleDownloadState.CRCCheck, "ERROR_416_FROM_SERVER"));
}
if (we.Status == WebExceptionStatus.Timeout)
{
Debug.LogException(we);
Debug.LogWarning("Connection Timed Out, likly due to poor or loss of connection, restarting bundle download");
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(BundleInfo.assetBundleName, AssetBundleDownloadState.CRCCheck));
}
else
{
Debug.LogException(we);
Debug.LogError("AssetBundler DoDownload: Exception caused assetbundle download failure " + BundleInfo.assetBundleName + " . Performing full file/CRC to work out file status: " + we.ToString());
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(BundleInfo.assetBundleName, AssetBundleDownloadState.CRCCheck)); //no error because timeouts aren't a problem with the bundle
}
}
catch (IOException ioe)
{
Debug.LogException(ioe);
Debug.LogError("AssetBundler DoDownload: IO/Write Exception. Deleting offending file: " + tempFileInfo.Name + ": " + ioe.ToString());
AssetBundleDownloadCorruptedOrBroken.Invoke(this, new AssetBundleDeleteAssetBundleFileEventArgs(BundleInfo.assetBundleName, "ASSETBUNDLE_IO_WRITE_EXCEPTION"));
//kick it right back off again
}
catch (ObjectDisposedException objectDisposedException)
{
Debug.LogWarning(objectDisposedException.Message);
Debug.LogWarning("Aborting download " + BundleInfo.assetBundleName + ", likly due to loss of connection, recheck bundle");
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(BundleInfo.assetBundleName, AssetBundleDownloadState.CRCCheck));
}
catch (ThreadAbortException)
{
Debug.LogWarning("AssetBundler DoDownload: Thread aborted. Assuming intentionally.");
//AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(assetBundleQueueInfo.AssetBundleName, AssetBundleDownloadState.CRCCheck, ""));
}
catch (Exception e)
{
Debug.LogException(e);
Debug.LogError("AssetBundler DoDownload: Exception caused assetbundle download failure. Performing full file/CRC to work out file status. Error: " + e.ToString());
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(BundleInfo.assetBundleName, AssetBundleDownloadState.CRCCheck, e.ToString()));
}
finally
{
if (saveFileStream != null)
{
saveFileStream.Close();
saveFileStream = null;
}
}
Debug.Log("Download Thread Ended: " + BundleInfo.assetBundleName);
}
public void ForceRecheckOfBundle(Bundle assetBundleQueueInfo)
{
AssetBundleStateChanged.Invoke(this, new AssetBundleStateChangedEventArgs(assetBundleQueueInfo.assetBundleName, AssetBundleDownloadState.CRCCheck));
}
