130 lines
3.6 KiB
C#
130 lines
3.6 KiB
C#
using UnityEngine;
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using UnityEngine.Networking;
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namespace YooAsset
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{
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internal abstract class DefaultDownloadFileOperation : FSDownloadFileOperation
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{
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protected enum ESteps
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{
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None,
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CheckExists,
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CreateRequest,
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CheckRequest,
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VerifyTempFile,
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CheckVerifyTempFile,
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TryAgain,
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Done,
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}
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// 下载参数
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protected readonly DownloadFileOptions Options;
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// 请求相关
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protected UnityWebRequest _webRequest;
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protected string _requestURL;
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protected int _requestCount = 0;
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// 超时相关
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protected bool _isAbort = false;
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protected long _latestDownloadBytes;
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protected float _latestDownloadRealtime;
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protected float _tryAgainTimer;
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// 失败相关
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protected int FailedTryAgain;
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internal DefaultDownloadFileOperation(PackageBundle bundle, DownloadFileOptions options) : base(bundle)
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{
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Options = options;
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FailedTryAgain = options.FailedTryAgain;
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}
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/// <summary>
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/// 获取网络请求地址
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/// </summary>
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protected string GetRequestURL()
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{
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// 轮流返回请求地址
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_requestCount++;
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if (_requestCount % 2 == 0)
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return Options.FallbackURL;
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else
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return Options.MainURL;
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}
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/// <summary>
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/// 重置请求字段
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/// </summary>
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protected void ResetRequestFiled()
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{
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// 重置变量
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_isAbort = false;
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_latestDownloadBytes = 0;
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_latestDownloadRealtime = Time.realtimeSinceStartup;
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DownloadProgress = 0f;
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DownloadedBytes = 0;
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// 重置计时器
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if (_tryAgainTimer > 0f)
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YooLogger.Warning($"Try again download : {_requestURL}");
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_tryAgainTimer = 0f;
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}
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/// <summary>
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/// 检测请求超时
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/// </summary>
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protected void CheckRequestTimeout()
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{
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// 注意：在连续时间段内无新增下载数据及判定为超时
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if (_isAbort == false)
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{
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if (_latestDownloadBytes != DownloadedBytes)
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{
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_latestDownloadBytes = DownloadedBytes;
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_latestDownloadRealtime = UnityEngine.Time.realtimeSinceStartup;
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}
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float offset = UnityEngine.Time.realtimeSinceStartup - _latestDownloadRealtime;
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if (offset > Options.Timeout)
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{
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YooLogger.Warning($"Download request timeout : {_requestURL}");
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if (_webRequest != null)
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_webRequest.Abort();
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_isAbort = true;
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}
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}
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}
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/// <summary>
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/// 检测请求结果
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/// </summary>
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protected bool CheckRequestResult()
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{
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HttpCode = _webRequest.responseCode;
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#if UNITY_2020_3_OR_NEWER
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if (_webRequest.result != UnityWebRequest.Result.Success)
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{
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Error = _webRequest.error;
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return false;
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}
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else
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{
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return true;
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}
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#else
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if (_webRequest.isNetworkError || _webRequest.isHttpError)
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{
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Error = _webRequest.error;
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return false;
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}
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else
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{
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return true;
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}
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#endif
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}
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}
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} |