141 lines
3.7 KiB
C#
141 lines
3.7 KiB
C#
using System.IO;
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namespace YooAsset
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{
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internal class LoadCacheManifestOperation : AsyncOperationBase
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{
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private enum ESteps
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{
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None,
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QueryCachePackageHash,
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VerifyFileHash,
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LoadCacheManifest,
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CheckDeserializeManifest,
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Done,
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}
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private readonly PersistentManager _persistent;
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private readonly string _packageVersion;
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private QueryCachePackageHashOperation _queryCachePackageHashOp;
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private DeserializeManifestOperation _deserializer;
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private string _manifestFilePath;
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private ESteps _steps = ESteps.None;
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/// <summary>
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/// 加载的清单实例
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/// </summary>
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public PackageManifest Manifest { private set; get; }
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public LoadCacheManifestOperation(PersistentManager persistent, string packageVersion)
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{
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_persistent = persistent;
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_packageVersion = packageVersion;
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}
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internal override void InternalOnStart()
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{
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_steps = ESteps.QueryCachePackageHash;
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}
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internal override void InternalOnUpdate()
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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.QueryCachePackageHash)
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{
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if (_queryCachePackageHashOp == null)
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{
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_queryCachePackageHashOp = new QueryCachePackageHashOperation(_persistent, _packageVersion);
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OperationSystem.StartOperation(_persistent.PackageName, _queryCachePackageHashOp);
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}
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if (_queryCachePackageHashOp.IsDone == false)
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return;
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if (_queryCachePackageHashOp.Status == EOperationStatus.Succeed)
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{
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_steps = ESteps.VerifyFileHash;
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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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Error = _queryCachePackageHashOp.Error;
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ClearCacheFile();
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}
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}
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if (_steps == ESteps.VerifyFileHash)
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{
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_manifestFilePath = _persistent.GetSandboxPackageManifestFilePath(_packageVersion);
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if (File.Exists(_manifestFilePath) == false)
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{
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_steps = ESteps.Done;
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Status = EOperationStatus.Failed;
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Error = $"Not found cache manifest file : {_manifestFilePath}";
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ClearCacheFile();
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return;
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}
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string fileHash = HashUtility.FileMD5(_manifestFilePath);
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if (fileHash != _queryCachePackageHashOp.PackageHash)
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{
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_steps = ESteps.Done;
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Status = EOperationStatus.Failed;
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Error = "Failed to verify cache manifest file hash !";
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ClearCacheFile();
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}
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else
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{
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_steps = ESteps.LoadCacheManifest;
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}
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}
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if (_steps == ESteps.LoadCacheManifest)
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{
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byte[] bytesData = File.ReadAllBytes(_manifestFilePath);
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_deserializer = new DeserializeManifestOperation(bytesData);
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OperationSystem.StartOperation(_persistent.PackageName, _deserializer);
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_steps = ESteps.CheckDeserializeManifest;
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}
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if (_steps == ESteps.CheckDeserializeManifest)
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{
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Progress = _deserializer.Progress;
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if (_deserializer.IsDone == false)
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return;
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if (_deserializer.Status == EOperationStatus.Succeed)
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{
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Manifest = _deserializer.Manifest;
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_steps = ESteps.Done;
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Status = EOperationStatus.Succeed;
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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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Error = _deserializer.Error;
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ClearCacheFile();
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}
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}
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}
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private void ClearCacheFile()
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{
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// 注意：如果加载沙盒内的清单报错，为了避免流程被卡住，主动把损坏的文件删除。
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if (File.Exists(_manifestFilePath))
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{
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YooLogger.Warning($"Failed to load cache manifest file : {Error}");
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YooLogger.Warning($"Invalid cache manifest file have been removed : {_manifestFilePath}");
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File.Delete(_manifestFilePath);
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}
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string hashFilePath = _persistent.GetSandboxPackageHashFilePath(_packageVersion);
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if (File.Exists(hashFilePath))
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{
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File.Delete(hashFilePath);
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}
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}
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}
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} |