private static string GetRealFileName(DownloadInfo dlInfo)
{
//创建正式文件名，如果已存在则加数字序号创建，避免覆盖
var fileIndex = 0;
var realFilePath = Path.Combine(dlInfo.saveDir, dlInfo.fileName);
while (File.Exists(realFilePath))
{
realFilePath = Path.Combine(dlInfo.saveDir, string.Format("{0}_{1}", fileIndex++, dlInfo.fileName));
}
return(realFilePath);
}
private void StartTask(DownloadInfo dlInfo)
{
this.dls = new List <DownloadService>();
if (dlInfo.TaskInfoList != null)
{
foreach (var item in dlInfo.TaskInfoList)
{
var dl = new DownloadService();
dl.OnDownload += OnDownloadHandler;
dls.Add(dl);
dl.Start(item, dlInfo.isReStart);
}
}
}
public static void Download(string URL, string path)
{
var downloadInfo = new DownloadInfo();
downloadInfo.saveDir = path;
downloadInfo.downloadUrlList = new List <string> {
URL
};
downloadInfo.taskCount = 1;
downloadInfo.IsSupportMultiThreading = true;
var downloadManager = new DownloadManager(downloadInfo);
downloadManager.OnDownload += DownloadManager_OnDownload;;
downloadManager.OnStart += DownloadManager_OnStart;;
downloadManager.OnStop += DownloadManager_OnStop;;
downloadManager.OnFinsh += DownloadManager_OnFinsh;
}
private void GetTaskInfo(DownloadInfo dlInfo)
{
var pieceSize = (dlInfo.count) / dlInfo.taskCount;
dlInfo.TaskInfoList = new List <TaskInfo>();
var rand = new Random();
var urlIndex = 0;
for (int i = 0; i <= dlInfo.taskCount + 1; i++)
{
var from = (i * pieceSize);
if (from >= dlInfo.count)
{
break;
}
var to = from + pieceSize;
if (to >= dlInfo.count)
{
to = dlInfo.count;
}
dlInfo.TaskInfoList.Add(
new TaskInfo
{
method = dlInfo.method,
downloadUrl = dlInfo.downloadUrlList[urlIndex++],
filePath = Path.Combine(dlInfo.saveDir, dlInfo.tempFileName + i + ".temp"),
fromIndex = from,
toIndex = to
});
if (urlIndex >= dlInfo.downloadUrlList.Count)
{
urlIndex = 0;
}
}
}
public DownloadManager(DownloadInfo dlInfo)
{
this.dlInfo = dlInfo;
}
