118 lines
2.6 KiB
C#
118 lines
2.6 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.Networking;
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namespace YooAsset
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{
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internal sealed class AssetBundleWebLoader : AssetBundleLoaderBase
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{
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private enum ESteps
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{
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None = 0,
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LoadFile,
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CheckFile,
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TryLoad,
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Done,
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}
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private ESteps _steps = ESteps.None;
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private float _tryTimer = 0;
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private string _webURL;
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private UnityWebRequest _webRequest;
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public AssetBundleWebLoader(BundleInfo bundleInfo) : base(bundleInfo)
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{
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}
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/// <summary>
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/// 轮询更新
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/// </summary>
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public override void Update()
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{
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if (_steps == ESteps.Done)
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return;
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if (_steps == ESteps.None)
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{
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// 检测加载地址是否为空
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if (string.IsNullOrEmpty(BundleFileInfo.LocalPath))
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{
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_steps = ESteps.Done;
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Status = EStatus.Failed;
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return;
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}
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if (string.IsNullOrEmpty(BundleFileInfo.RemoteMainURL))
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_webURL = BundleFileInfo.LocalPath;
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else
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_webURL = BundleFileInfo.RemoteMainURL;
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_steps = ESteps.LoadFile;
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}
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// 1. 从服务器或缓存中获取AssetBundle文件
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if (_steps == ESteps.LoadFile)
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{
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string hash = StringUtility.RemoveExtension(BundleFileInfo.Hash);
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_webRequest = UnityWebRequestAssetBundle.GetAssetBundle(_webURL, Hash128.Parse(hash));
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_webRequest.SendWebRequest();
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_steps = ESteps.CheckFile;
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}
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// 2. 检测获取的AssetBundle文件
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if (_steps == ESteps.CheckFile)
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{
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if (_webRequest.isDone == false)
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return;
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#if UNITY_2020_1_OR_NEWER
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if (_webRequest.result != UnityWebRequest.Result.Success)
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#else
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if (_webRequest.isNetworkError || _webRequest.isHttpError)
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#endif
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{
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Debug.LogWarning($"Failed to get asset bundle form web : {_webURL} Error : {_webRequest.error}");
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_steps = ESteps.TryLoad;
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_tryTimer = 0;
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}
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else
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{
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CacheBundle = DownloadHandlerAssetBundle.GetContent(_webRequest);
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if (CacheBundle == null)
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{
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Debug.LogError($"Get asset bundle error : {_webRequest.error}");
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_steps = ESteps.Done;
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Status = EStatus.Failed;
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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 = EStatus.Succeed;
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}
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}
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}
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// 3. 如果获取失败，重新尝试
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if (_steps == ESteps.TryLoad)
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{
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_tryTimer += Time.unscaledDeltaTime;
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if (_tryTimer > 1f)
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{
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_webRequest.Dispose();
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_webRequest = null;
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_steps = ESteps.LoadFile;
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}
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}
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}
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/// <summary>
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/// 主线程等待异步操作完毕
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/// </summary>
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public override void WaitForAsyncComplete()
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{
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throw new System.NotImplementedException($"WebGL platform not support {nameof(WaitForAsyncComplete)}");
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}
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}
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} |