151 lines
4.9 KiB
C#
151 lines
4.9 KiB
C#
using System.IO;
|
|
using UnityEngine;
|
|
using UnityEngine.Networking;
|
|
|
|
namespace YooAsset
|
|
{
|
|
internal class DWFSDownloadWebFileOperation : DefaultDownloadFileOperation
|
|
{
|
|
private readonly DefaultWebFileSystem _fileSystem;
|
|
private DownloadHandlerAssetBundle _downloadhandler;
|
|
private ESteps _steps = ESteps.None;
|
|
|
|
/// <summary>
|
|
/// 下载结果
|
|
/// </summary>
|
|
public AssetBundle Result { private set; get; }
|
|
|
|
|
|
internal DWFSDownloadWebFileOperation(DefaultWebFileSystem fileSystem, PackageBundle bundle, string mainURL, string fallbackURL, int failedTryAgain, int timeout)
|
|
: base(bundle, mainURL, fallbackURL, failedTryAgain, timeout)
|
|
{
|
|
_fileSystem = fileSystem;
|
|
}
|
|
internal override void InternalOnStart()
|
|
{
|
|
_steps = ESteps.CreateRequest;
|
|
}
|
|
internal override void InternalOnUpdate()
|
|
{
|
|
if (_steps == ESteps.None || _steps == ESteps.Done)
|
|
return;
|
|
|
|
// 创建下载器
|
|
if (_steps == ESteps.CreateRequest)
|
|
{
|
|
// 获取请求地址
|
|
_requestURL = GetRequestURL();
|
|
|
|
// 重置变量
|
|
_isAbort = false;
|
|
_latestDownloadBytes = 0;
|
|
_latestDownloadRealtime = Time.realtimeSinceStartup;
|
|
DownloadProgress = 0f;
|
|
DownloadedBytes = 0;
|
|
|
|
// 重置计时器
|
|
if (_tryAgainTimer > 0f)
|
|
YooLogger.Warning($"Try again download : {_requestURL}");
|
|
_tryAgainTimer = 0f;
|
|
|
|
// 创建下载器
|
|
CreateWebRequest();
|
|
|
|
_steps = ESteps.CheckRequest;
|
|
}
|
|
|
|
// 检测下载结果
|
|
if (_steps == ESteps.CheckRequest)
|
|
{
|
|
DownloadProgress = _webRequest.downloadProgress;
|
|
DownloadedBytes = (long)_webRequest.downloadedBytes;
|
|
Progress = DownloadProgress;
|
|
if (_webRequest.isDone == false)
|
|
{
|
|
CheckRequestTimeout();
|
|
return;
|
|
}
|
|
|
|
// 检查网络错误
|
|
if (CheckRequestResult())
|
|
{
|
|
_steps = ESteps.Done;
|
|
Result = _downloadhandler.assetBundle;
|
|
Status = EOperationStatus.Succeed;
|
|
}
|
|
else
|
|
{
|
|
_steps = ESteps.TryAgain;
|
|
}
|
|
|
|
// 注意：最终释放请求器
|
|
DisposeWebRequest();
|
|
}
|
|
|
|
// 重新尝试下载
|
|
if (_steps == ESteps.TryAgain)
|
|
{
|
|
if (FailedTryAgain <= 0)
|
|
{
|
|
Status = EOperationStatus.Failed;
|
|
_steps = ESteps.Done;
|
|
YooLogger.Error(Error);
|
|
return;
|
|
}
|
|
|
|
_tryAgainTimer += Time.unscaledDeltaTime;
|
|
if (_tryAgainTimer > 1f)
|
|
{
|
|
FailedTryAgain--;
|
|
_steps = ESteps.CreateRequest;
|
|
YooLogger.Warning(Error);
|
|
}
|
|
}
|
|
}
|
|
internal override void InternalOnAbort()
|
|
{
|
|
_steps = ESteps.Done;
|
|
DisposeWebRequest();
|
|
}
|
|
|
|
private void CreateWebRequest()
|
|
{
|
|
_webRequest = DownloadSystemHelper.NewUnityWebRequestGet(_requestURL);
|
|
_webRequest.downloadHandler = CreateDownloadHandler();
|
|
_webRequest.disposeDownloadHandlerOnDispose = true;
|
|
_webRequest.SendWebRequest();
|
|
}
|
|
private DownloadHandlerAssetBundle CreateDownloadHandler()
|
|
{
|
|
if (_fileSystem.DisableUnityWebCache)
|
|
{
|
|
var downloadhandler = new DownloadHandlerAssetBundle(_requestURL, 0);
|
|
#if UNITY_2020_3_OR_NEWER
|
|
downloadhandler.autoLoadAssetBundle = false;
|
|
#endif
|
|
return downloadhandler;
|
|
}
|
|
else
|
|
{
|
|
// 注意：优先从浏览器缓存里获取文件
|
|
// The file hash defining the version of the asset bundle.
|
|
uint unityCRC = Bundle.UnityCRC;
|
|
Hash128 fileHash = Hash128.Parse(Bundle.FileHash);
|
|
var downloadhandler = new DownloadHandlerAssetBundle(_requestURL, fileHash, unityCRC);
|
|
#if UNITY_2020_3_OR_NEWER
|
|
downloadhandler.autoLoadAssetBundle = false;
|
|
#endif
|
|
return downloadhandler;
|
|
}
|
|
}
|
|
private void DisposeWebRequest()
|
|
{
|
|
if (_webRequest != null)
|
|
{
|
|
//注意：引擎底层会自动调用Abort方法
|
|
_webRequest.Dispose();
|
|
_webRequest = null;
|
|
}
|
|
}
|
|
}
|
|
} |