188 lines
4.0 KiB
C#
188 lines
4.0 KiB
C#
using System.IO;
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namespace YooAsset
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{
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public class RawFileOperation : 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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Prepare,
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DownloadFromWeb,
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CheckDownloadFromWeb,
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CheckFile,
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DownloadFromApk,
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CheckDownloadFromApk,
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Done,
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}
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private readonly BundleInfo _bundleInfo;
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private readonly string _savePath;
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private ESteps _steps = ESteps.None;
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private DownloaderBase _downloader;
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private UnityWebFileRequester _fileRequester;
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/// <summary>
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/// 原生文件的存储路径
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/// </summary>
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public string SavePath
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{
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get { return _savePath; }
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}
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internal RawFileOperation(BundleInfo bundleInfo, string savePath)
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{
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_bundleInfo = bundleInfo;
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_savePath = savePath;
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}
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internal override void Start()
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{
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_steps = ESteps.Prepare;
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}
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internal override void Update()
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{
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if (_steps == ESteps.None || _steps == ESteps.Done)
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return;
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// 1. 准备工作
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if (_steps == ESteps.Prepare)
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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(_bundleInfo.LocalPath))
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{
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_steps = ESteps.Done;
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Status = EOperationStatus.Failed;
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Error = "Local path is null or empty.";
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return;
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}
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if (string.IsNullOrEmpty(_bundleInfo.RemoteMainURL))
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_steps = ESteps.CheckFile;
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else
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_steps = ESteps.DownloadFromWeb;
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}
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// 2. 从服务器下载
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if (_steps == ESteps.DownloadFromWeb)
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{
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int failedTryAgain = int.MaxValue;
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_downloader = DownloadSystem.BeginDownload(_bundleInfo, failedTryAgain);
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_steps = ESteps.CheckDownloadFromWeb;
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}
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// 3. 检测服务器下载结果
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if (_steps == ESteps.CheckDownloadFromWeb)
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{
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if (_downloader.IsDone() == false)
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return;
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if (_downloader.HasError())
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{
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_steps = ESteps.Done;
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Status = EOperationStatus.Failed;
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Error = _downloader.GetLastError();
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}
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else
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{
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// 注意：当文件更新之后，需要删除旧文件
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if (File.Exists(_savePath))
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File.Delete(_savePath);
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_steps = ESteps.CheckFile;
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}
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}
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// 4. 检测文件
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if (_steps == ESteps.CheckFile)
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{
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// 注意：如果原生文件已经存在，则验证其完整性
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if (File.Exists(_savePath))
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{
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bool result = DownloadSystem.CheckContentIntegrity(_savePath, _bundleInfo.SizeBytes, _bundleInfo.CRC);
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if (result)
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{
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_steps = ESteps.Done;
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Status = EOperationStatus.Succeed;
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return;
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}
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else
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{
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File.Delete(_savePath);
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}
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}
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if (_bundleInfo.IsBuildinJarFile())
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{
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_steps = ESteps.DownloadFromApk;
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}
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else
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{
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try
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{
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File.Copy(_bundleInfo.LocalPath, _savePath, true);
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}
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catch (System.Exception e)
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{
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_steps = ESteps.Done;
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Status = EOperationStatus.Failed;
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Error = e.ToString();
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return;
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}
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_steps = ESteps.Done;
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Status = EOperationStatus.Succeed;
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}
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}
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// 5. 从APK拷贝文件
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if (_steps == ESteps.DownloadFromApk)
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{
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string downloadURL = PathHelper.ConvertToWWWPath(_bundleInfo.LocalPath);
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_fileRequester = new UnityWebFileRequester();
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_fileRequester.SendRequest(downloadURL, _savePath);
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_steps = ESteps.CheckDownloadFromApk;
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}
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// 6. 检测APK拷贝文件结果
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if (_steps == ESteps.CheckDownloadFromApk)
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{
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if (_fileRequester.IsDone() == false)
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return;
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if (_fileRequester.HasError())
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{
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_steps = ESteps.Done;
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Status = EOperationStatus.Failed;
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Error = _fileRequester.GetError();
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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.Succeed;
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}
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_fileRequester.Dispose();
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}
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}
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/// <summary>
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/// 获取原生文件的二进制数据
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/// </summary>
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public byte[] GetFileData()
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{
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if (File.Exists(_savePath) == false)
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return null;
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return File.ReadAllBytes(_savePath);
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}
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/// <summary>
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/// 获取原生文件的文本数据
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/// </summary>
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public string GetFileText()
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{
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if (File.Exists(_savePath) == false)
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return string.Empty;
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return File.ReadAllText(_savePath, System.Text.Encoding.UTF8);
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}
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}
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} |