/// <summary>
/// 保存断点下载的数据碎片
/// </summary>
/// <param name="downloadItemModel"></param>
private void SaveProcessFragmentsData(DownloadItemModel downloadItemModel)
{
if (!File.Exists(downloadItemModel.FragmentsFileSaveName))
{
File.Create(downloadItemModel.FragmentsFileSaveName).Dispose();
}
File.WriteAllText(downloadItemModel.FragmentsFileSaveName, downloadItemModel.ModelToJsonString());
}
/// <summary>
/// 开始下载文件
/// </summary>
/// <param name="downloadurl">下载地址</param>
/// <param name="saveFileName">文件保存位置。包含文件的保存路径和完整的文件名</param>
/// <param name="downloadingCallback">下载中的回调</param>
/// <param name="downloadedFinshCallback">下载完成后的回调</param>
/// <param name="downloadErrorCallBack">下载错误回调</param>
/// <param name="isResetDownload">标记是否强制重新下载</param>
/// <param name="data">下载任务的附加数据</param>
/// <param name="mtag">下载任务的附加数据</param>
/// <returns></returns>
public HTTPRequest DownLoad(string downloadurl, string saveFileName, BlankActionForDownloadItemModel downloadingCallback, BlankActionForDownloadItemModel downloadedFinshCallback, BlankAction downloadErrorCallBack, bool isResetDownload = false, string data = "", string mtag = "")
{
if (!Directory.Exists(saveFileName))
{
Directory.CreateDirectory(Path.GetDirectoryName(saveFileName));
}
if (m_downloadHttpRequests.ContainsKey(downloadurl))
{
if (m_downloadItemModels.ContainsKey(downloadurl))
{
DownloadItemModel downloadItemModel = m_downloadItemModels[downloadurl];
downloadItemModel.DownloadingCallback = downloadingCallback;
downloadItemModel.DownloadedFinshCallback = downloadedFinshCallback;
}
// 下载中
return(m_downloadHttpRequests[downloadurl]);
}
else
{
// 未下载中
// 读取 断点数据
DownloadItemModel downloadItemModel = ReadProcessFragmentsData(saveFileName, isResetDownload);
if (string.IsNullOrEmpty(downloadItemModel.ID))
{
downloadItemModel.ID = DateTime.Now.ToFileTime().ToString();
}
downloadItemModel.Data = data;
downloadItemModel.Tag = mtag;
downloadItemModel.LastDownloadTimeSpan = Time.realtimeSinceStartup;
downloadItemModel.DownloadUrl = downloadurl;
downloadItemModel.FileSaveName = saveFileName;
downloadItemModel.DownloadingCallback = downloadingCallback;
downloadItemModel.DownloadedFinshCallback = downloadedFinshCallback;
HTTPRequest httpRequest = new HTTPRequest(new Uri(downloadurl), (req, rep) =>
{
if (rep != null)
{
if (downloadItemModel.DownloadSize <= 0)
{
string contentLength = rep.GetFirstHeaderValue("content-length");
downloadItemModel.DownloadSize = long.Parse(contentLength);
}
}
switch (req.State)
{
case HTTPRequestStates.Initial:
break;
case HTTPRequestStates.Queued:
break;
case HTTPRequestStates.Processing:
{
downloadItemModel.IsDownloadFinsh = false;
ProgressDownloadData(saveFileName, rep, downloadItemModel);
// 下载中的回调
if (downloadItemModel.DownloadingCallback != null)
{
try
{
downloadingCallback(downloadItemModel);
}
catch (Exception exception)
{
Debug.LogError("DownloadURL:" + downloadurl + exception.Message + exception.Source + exception.TargetSite + downloadItemModel.ToString());
throw;
}
}
}
break;
case HTTPRequestStates.Finished:
if (rep != null && rep.IsSuccess)
{
ProgressDownloadData(saveFileName, rep, downloadItemModel);
if (rep.IsStreamingFinished)
{
UpdateDownloadFinshState(downloadItemModel);
// 下载完成后回调
if (downloadedFinshCallback != null)
{
try
{
downloadedFinshCallback(downloadItemModel);
}
catch (Exception exception)
{
Debug.LogError("DownloadURL:" + downloadurl + exception.Message + exception.Source + exception.TargetSite + downloadItemModel.ToString());
throw;
}
}
Log.I("下载完成");
}
StopDownLoad(downloadItemModel.DownloadUrl);
}
break;
case HTTPRequestStates.Aborted:
{
// 下载 终止
Log.I(string.Format(" 下载任务 {0} 终止 ", downloadurl));
NotificationManager.Instance.PostNotification(DownLoadManagerNotificationConst.DOWN_LOAD_MANAGER_TASK_STOP, downloadurl, DownLoadManagerNotificationConst.DOWN_LOAD_MANAGER_FILTER);
}
break;
case HTTPRequestStates.Error:
case HTTPRequestStates.ConnectionTimedOut:
case HTTPRequestStates.TimedOut:
{
if (downloadErrorCallBack != null)
{
downloadErrorCallBack();
}
// 下载错误
Log.I(string.Format(" 下载任务 {0} 错误 ", downloadurl));
NotificationManager.Instance.PostNotification(DownLoadManagerNotificationConst.DOWN_LOAD_MANAGER_TASK_ERROR, downloadurl, DownLoadManagerNotificationConst.DOWN_LOAD_MANAGER_FILTER);
}
break;
}
})
{
IsKeepAlive = true,
DisableCache = true,
UseStreaming = true,
StreamFragmentSize = HTTPResponse.MinBufferSize * 100,
ConnectTimeout = TimeSpan.FromSeconds(5),
Timeout = TimeSpan.FromSeconds(5)
};
if (downloadItemModel.IsDownloadFinsh)
{
Log.I("已经下载过该文件" + downloadItemModel.ModelToJsonString());
UpdateDownloadFinshState(downloadItemModel);
// 下载完成后回调
if (downloadedFinshCallback != null)
{
try
{
downloadedFinshCallback(downloadItemModel);
}
catch (Exception exception)
{
Debug.LogError("DownloadURL:" + downloadurl + exception.Message + exception.Source + exception.TargetSite + downloadItemModel);
throw;
}
}
return(httpRequest);
}
if (downloadItemModel.DownloadedSize > 0)
{
httpRequest.SetRangeHeader((int)downloadItemModel.DownloadedSize);
httpRequest.Tag = downloadItemModel.DownloadedSize;
Log.I(" 开始断点下载 " + downloadItemModel.ModelToJsonString());
}
else
{
DataCacheManager.Instance.AppendList(downloadItemModel, DOWN_LOAD_MANAGER_MODULE_NAME);
}
httpRequest.Send();
m_downloadItemModels.Add(downloadurl, downloadItemModel);
m_downloadHttpRequests.Add(downloadurl, httpRequest);
return(httpRequest);
}
}