113 lines
3.8 KiB
C#
113 lines
3.8 KiB
C#
using UnityEngine.Networking;
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using UnityEngine;
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namespace YooAsset
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{
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internal class UnityAssetBundleRequestOperation : UnityWebRequestOperation
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{
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protected enum ESteps
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{
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None,
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CreateRequest,
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Download,
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Done,
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}
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private UnityWebRequestAsyncOperation _requestOperation;
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private DownloadHandlerAssetBundle _downloadhandler;
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private readonly PackageBundle _packageBundle;
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private readonly bool _disableUnityWebCache;
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private ESteps _steps = ESteps.None;
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/// <summary>
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/// 请求结果
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/// </summary>
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public AssetBundle Result { private set; get; }
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internal UnityAssetBundleRequestOperation(PackageBundle packageBundle, bool disableUnityWebCache, string url) : base(url)
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{
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_packageBundle = packageBundle;
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_disableUnityWebCache = disableUnityWebCache;
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}
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internal override void InternalStart()
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{
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_steps = ESteps.CreateRequest;
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}
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internal override void InternalUpdate()
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{
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if (_steps == ESteps.None || _steps == ESteps.Done)
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return;
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if (_steps == ESteps.CreateRequest)
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{
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CreateWebRequest();
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_steps = ESteps.Download;
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}
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if (_steps == ESteps.Download)
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{
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DownloadProgress = _webRequest.downloadProgress;
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DownloadedBytes = (long)_webRequest.downloadedBytes;
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Progress = _requestOperation.progress;
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if (_requestOperation.isDone == false)
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return;
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if (CheckRequestResult())
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{
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AssetBundle assetBundle = _downloadhandler.assetBundle;
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if (assetBundle == null)
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{
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_steps = ESteps.Done;
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Status = EOperationStatus.Failed;
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Error = $"URL : {_requestURL} Download handler asset bundle object is null !";
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}
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else
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{
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_steps = ESteps.Done;
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Result = assetBundle;
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Status = EOperationStatus.Succeed;
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}
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}
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else
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{
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_steps = ESteps.Done;
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Status = EOperationStatus.Failed;
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}
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// 注意：最终释放请求器
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DisposeRequest();
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}
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}
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private void CreateWebRequest()
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{
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_downloadhandler = CreateWebDownloadHandler();
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_webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
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_webRequest.downloadHandler = _downloadhandler;
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_webRequest.disposeDownloadHandlerOnDispose = true;
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_requestOperation = _webRequest.SendWebRequest();
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}
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private DownloadHandlerAssetBundle CreateWebDownloadHandler()
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{
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if (_disableUnityWebCache)
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{
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var downloadhandler = new DownloadHandlerAssetBundle(_requestURL, _packageBundle.UnityCRC);
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#if UNITY_2020_3_OR_NEWER
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downloadhandler.autoLoadAssetBundle = false;
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#endif
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return downloadhandler;
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}
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else
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{
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// 注意：优先从浏览器缓存里获取文件
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// The file hash defining the version of the asset bundle.
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Hash128 fileHash = Hash128.Parse(_packageBundle.FileHash);
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var downloadhandler = new DownloadHandlerAssetBundle(_requestURL, fileHash, _packageBundle.UnityCRC);
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#if UNITY_2020_3_OR_NEWER
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downloadhandler.autoLoadAssetBundle = false;
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#endif
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return downloadhandler;
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}
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}
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}
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} |