private void Update()
{
if (_webRequest == null)
{
return;
}
State = GetStateInfoFromDownload();
if (State == AssetBundleVerifyState.InProgress)
{
if (EditorUtility.DisplayCancelableProgressBar("AssetBundle Download", "",
_webRequest.downloadProgress))
{
_webRequest.Abort();
_webRequest.Dispose();
_webRequest = null;
Debug.Log("Download process was cancelled.");
}
return;
}
// Performs download operation only once when webrequest is completed.
EditorUtility.ClearProgressBar();
HandleState(State, _webRequest);
Repaint();
// Turn request to null to signal ready for next call
_webRequest.Dispose();
_webRequest = null;
}
// Visible for testing
internal void HandleState(AssetBundleVerifyState state, UnityWebRequest webRequest)
{
// InProgress state should not be handled.
switch (state)
{
case AssetBundleVerifyState.DestinationError:
AssetBundleDownloadIsSuccessful = false;
ErrorDescription = "Cannot connect to destination host. See Console log for details.";
// No need to log since debugging information in this case is logged from thrown exception.
break;
case AssetBundleVerifyState.WebRequestError:
AssetBundleDownloadIsSuccessful = false;
ErrorDescription = webRequest.error;
Debug.LogErrorFormat(WebRequestErrorFormatMessage, AssetBundleUrl,
ErrorDescription);
break;
case AssetBundleVerifyState.BundleError:
AssetBundleDownloadIsSuccessful = false;
ErrorDescription = "Error extracting AssetBundle. See Console log for details.";
// No need to log since debugging information in this case is automatically logged by Unity.
break;
case AssetBundleVerifyState.DownloadSuccess:
AssetBundleDownloadIsSuccessful = true;
_numOfMegabytes = ConvertBytesToMegabytes(webRequest.downloadedBytes);
var scenes = _bundle.GetAllScenePaths();
_mainScene = (scenes.Length == 0) ? "No scenes in AssetBundle" : scenes[0];
// Free memory used by the AssetBundle since it will not be in use by the Editor. Set to true to destroy
// all objects that were loaded from this bundle.
_bundle.Unload(true);
break;
default:
var errorMessage =
string.Format(
"Unexpected state while checking the AssetBundle: {0}",
state);
throw new InvalidOperationException(errorMessage);
}
}
