private static void UpdateHistory()
{
var remotefile = DownloadState.Parameter.RemoteFile;
var historyApply = new Apply();
var historyFileItem = new FileItem();
var parameter = new TransferParameter();
if (DownloadHistory.Exists(remotefile, ref historyFileItem, ref historyApply, ref parameter, false))
{
historyFileItem.EndTime = DateTime.Now;
historyFileItem.IsCompleted = true;
DownloadHistory.Update(remotefile, historyFileItem);
}
}
private void DownloadFile(TransferParameter parameter)
{
try
{
string logstr = "下载任务开始,正在创建临时目录.";
Log.Debug(logstr);
string[] tempList = Directory.GetDirectories(Logger.TemporaryDirectory);
DirectoryInfo di = null;
if (tempList.Length > 0)
{
foreach (string item in tempList)
{
di = new DirectoryInfo(item);
if (di.LastWriteTime <= DateTime.Now.AddMonths(-6))
{
FileUtil.DeleteDirectory(item);
}
}
}
logstr = "正在创建本地保存目录.";
Log.Debug(logstr);
string localDir = Path.GetDirectoryName(parameter.LocalFile);
if (!string.IsNullOrEmpty(localDir))
{
di = new DirectoryInfo(localDir);
if (!di.Exists)
{
di.Create();
}
}
logstr = "正在初始化...";
Log.Debug(logstr + "\r\n" + parameter.ToString());
DownloadState.BlockList.Clear();
var currentApply = new Apply();
DownloadState.BlockList = DownloadRequst.GetBlocks(parameter, ref currentApply);
Log.Debug(currentApply.ToString());
DownloadState.AllowAppend = false;
DownloadState.StopDownload = false;
DownloadState.HasFinished = false;
DownloadState.IsCompleted = false;
DownloadState.OutputDebugLog = true;
BlockEvents.CompletedBytesCount = 0;
BlockEvents.TotalBytes = currentApply.FileSize;
ServicePointManager.DefaultConnectionLimit = 100;
var historyApply = new Apply();
var historyFileItem = new FileItem();
var historyparameter = new TransferParameter();
if (DownloadHistory.Exists(parameter.RemoteFile, ref historyFileItem, ref historyApply, ref historyparameter, false) &&
DownloadState.CurrentApply.Equals(historyApply) &&
!File.Exists(parameter.LocalFile))
{
logstr = "已恢复下载.";
Log.Debug(logstr);
DownloadState.AllowAppend = true;
historyFileItem.HasBreaked = true;
if (string.IsNullOrEmpty(historyFileItem.BreakInfo))
{
historyFileItem.BreakInfo = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
}
else
{
historyFileItem.BreakInfo += ";" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
}
DownloadHistory.Update(parameter.RemoteFile, historyFileItem);
}
else if (DownloadHistory.Exists(parameter.RemoteFile, ref historyFileItem, ref historyApply, ref historyparameter, true) &&
parameter.Equals(historyparameter) &&
File.Exists(historyparameter.LocalFile))
{
var fileInfo = new FileInfo(parameter.LocalFile);
if (fileInfo.Length == DownloadState.CurrentApply.FileSize &&
fileInfo.LastWriteTime == DownloadState.CurrentApply.LastModified)
{
logstr = parameter.TransferUrl + "此前已完成下载.";
Log.Debug(logstr);
DownloadState.HasFinished = true;
BlockEvents.CompletedBytesCount = fileInfo.Length;
BlockEvents.OnProgress(100, 100);
BlockEvents.OnCompleted();
return;
}
}
if (!DownloadState.AllowAppend && !DownloadState.HasFinished)
{
DownloadHistory.Insert(parameter.RemoteFile);
logstr = "已将本次下载任务追加到历史.";
Log.Debug(logstr);
}
if (BlockEvents.Begining != null)
{
BlockEvents.Begining(parameter.LocalFile);
}
logstr = "开始处理分块";
Log.Warn(logstr);
foreach (Blocks item in DownloadState.BlockList)
{
item.ReStore();
item.Download();
logstr += item.ToString() + "\r\n";
Log.Debug(logstr);
}
Log.Info("文件下载完毕");
}
catch (Exception err)
{
BlockEvents.OnException(err);
}
}