// 从资源服务器下载非Assetbundle资源，非AB（不计引用计数、不缓存），Creater使用后记得回收
public ResourceWebRequester DownloadAssetFileAsync(string filePath)
{
if (string.IsNullOrEmpty(DownloadUrl))
{
Logger.LogError("You should set download url first!!!");
return(null);
}
var creater = ResourceWebRequester.Get();
var url = DownloadUrl + filePath;
var saveUrl = AssetBundleUtility.GetPersistentFilePathWWW(filePath);
creater.Init(filePath, url, new DownloadHandlerBuffer(), true);
webRequesterQueue.Enqueue(creater);
return(creater);
}