134 lines
2.9 KiB
C#
134 lines
2.9 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.Networking;
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using UnityEngine;
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namespace YooAsset
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{
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/// <summary>
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/// 下载器
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/// 说明：UnityWebRequest(UWR) supports reading streaming assets since 2017.1
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/// </summary>
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internal class UnityWebFileRequester
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{
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private UnityWebRequest _webRequest;
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private UnityWebRequestAsyncOperation _operationHandle;
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// 超时相关
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private float _timeout;
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private bool _isAbort = false;
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private ulong _latestDownloadBytes;
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private float _latestDownloadRealtime;
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/// <summary>
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/// 请求URL地址
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/// </summary>
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public string URL { private set; get; }
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/// <summary>
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/// 发送GET请求
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/// </summary>
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public void SendRequest(string url, string savePath, float timeout = 60)
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{
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if (_webRequest == null)
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{
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URL = url;
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_timeout = timeout;
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_latestDownloadBytes = 0;
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_latestDownloadRealtime = Time.realtimeSinceStartup;
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_webRequest = DownloadSystem.NewRequest(URL);
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DownloadHandlerFile handler = new DownloadHandlerFile(savePath);
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handler.removeFileOnAbort = true;
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_webRequest.downloadHandler = handler;
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_webRequest.disposeDownloadHandlerOnDispose = true;
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_operationHandle = _webRequest.SendWebRequest();
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}
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}
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/// <summary>
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/// 释放下载器
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/// </summary>
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public void Dispose()
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{
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if (_webRequest != null)
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{
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_webRequest.Dispose();
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_webRequest = null;
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_operationHandle = null;
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}
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}
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/// <summary>
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/// 是否完毕（无论成功失败）
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/// </summary>
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public bool IsDone()
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{
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if (_operationHandle == null)
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return false;
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return _operationHandle.isDone;
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}
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/// <summary>
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/// 下载进度
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/// </summary>
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public float Progress()
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{
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if (_operationHandle == null)
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return 0;
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return _operationHandle.progress;
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}
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/// <summary>
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/// 下载是否发生错误
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/// </summary>
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public bool HasError()
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{
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#if UNITY_2020_3_OR_NEWER
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return _webRequest.result != UnityWebRequest.Result.Success;
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#else
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if (_webRequest.isNetworkError || _webRequest.isHttpError)
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return true;
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else
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return false;
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#endif
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}
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/// <summary>
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/// 获取错误信息
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/// </summary>
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public string GetError()
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{
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if (_webRequest != null)
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{
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return $"URL : {URL} Error : {_webRequest.error}";
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}
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return string.Empty;
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}
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/// <summary>
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/// 检测超时
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/// </summary>
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public void CheckTimeout()
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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 != _webRequest.downloadedBytes)
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{
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_latestDownloadBytes = _webRequest.downloadedBytes;
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_latestDownloadRealtime = Time.realtimeSinceStartup;
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}
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float offset = Time.realtimeSinceStartup - _latestDownloadRealtime;
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if (offset > _timeout)
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{
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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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}
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} |