IEnumerator LoadAssetList(AssetListLoadedFunc callBack)
{
// Defer this function to the next frame until server replied and response has been downloaded
UnityWebRequest req = UnityWebRequest.Get(string.Format("{0}/Bundle", this.ServerAddress));
yield return req.SendWebRequest();
if (req.isNetworkError || req.isHttpError)
{
_lastError = req.error;
if (callBack != null)
callBack(null);
}
else
{
Debug.Log("Asset Manager: Asset list finished downloading.");
AssetBundleListing listing = JsonUtility.FromJson<AssetBundleListing>(req.downloadHandler.text);
List<string> assetList = new List<string>();
foreach (var bundle in listing.AssetBundleList)
{
assetList.Add(bundle.BundleName);
if (bundle.Thumbnail != null)
{
_thumbnails[bundle.BundleName] = System.Convert.FromBase64String(bundle.Thumbnail);
bundle.Thumbnail = null;
}
}
if (callBack != null)
{
// Dispatch events
callBack(assetList);
if (OnAssetListLoaded != null)
{
OnAssetListLoaded(assetList);
}
}
}
}
/// <summary>
/// Sends a request to the Asset Server and fetches the list of all
/// stored assets waiting to be queried asynchroniously.
/// Due to the returning list containing the Thumbnails of the AssetBundles,
/// this Request is a network-heavy process and should only be called once.
/// </summary>
/// <param name="callBack">
/// Method to be called when returning the list of Assets.
/// Callback will get a null-argument if an error occured while fetchting the list.
/// </param>
public void RequestAssetList(AssetListLoadedFunc callBack)
{
Debug.Log("Asset Manager: Requesting asset list from server...");
StartCoroutine(LoadAssetList(callBack));
}
