private async Task StartDownLoadVideo()
{
do
{
VideoPagedInfo data = new VideoPagedInfo();
if (tasks.Count < ThreadCount)
{
if (Queue.TryDequeue(out data))
{
var tokenSource = new CancellationTokenSource();
var resetEvent = new ManualResetEvent(true);
var task = Task.Run(() => DownLoadVideo(data, resetEvent), tokenSource.Token);
tasks.Add(data.cid, new DownLoadTask {
Key = data.AID + data.page.ToString(), ResetEvent = resetEvent, VideoTask = task, Token = tokenSource
});
}
}
//检查进程
foreach (var item in tasks)
{
var v = DownList.Where(q => q.cid == item.Key).FirstOrDefault();
if (v.state == "错误")
{
var tokenSource = new CancellationTokenSource();
var resetEvent = new ManualResetEvent(true);
var task = Task.Run(() => DownLoadVideo(data, resetEvent), tokenSource.Token);
tasks[item.Key] = new DownLoadTask {
Key = data.AID + data.page.ToString(), ResetEvent = resetEvent, VideoTask = task, Token = tokenSource
};
}
}
await Task.Delay(1000);
} while (true);
}
private async Task DownLoadVideo(VideoPagedInfo data, ManualResetEvent resetEvent)
{
try
{
var video = DownList.FirstOrDefault(q => q.cid.Equals(data.cid));
if (video != null)
{
var SavePath = video.SavePath + "\\" + video.Title + "\\";
if (!Directory.Exists(SavePath))
{
Directory.CreateDirectory(SavePath);
}
var fileName = $"P{data.page}{data.part}";
//三次重试
for (int j = 0; j < 4; j++)
{
var urlReq = new jfYuRequest($"https://api.bilibili.com/x/player/playurl?avid={data.AID}&cid={data.cid}&ptype=json&qn=112")
{
Encoding = Encoding.UTF8,
Timeout = 30000
};
var urlReqhtml = await urlReq.GetHtmlAsync();
var urlReqData = Serializer.Deserialize <dynamic>(urlReqhtml);
string url = urlReqData.data.durl[0].url;
data.size = urlReqData.data.durl[0].size;
data.Size = ((decimal)data.size / 1024 / 1024).ToString("0.00") + "MB";
var dfreq = new jfYuRequest(url);
dfreq.RequestHeader.Referer = $"https://www.bilibili.com/video/{video.BVID}";
try
{
bool result = await dfreq.GetFileAsync($"{SavePath}\\{fileName}.flv", (q, e, t) =>
{
resetEvent.WaitOne();
Dispatcher.Invoke(() =>
{
var pro = double.Parse(q.ToString("0.00"));
data.Process = pro + "%";
data.Speed = e > 1024 ? $"{e / 1024:0.00}MB/s" : $"{e:0.00}KB/s";
//TimeSpan time = TimeSpan.FromSeconds((double)t);
VideoListView.Items.Refresh();
});
});
if (result)
{
Dispatcher.Invoke(() =>
{
data.color = Color.Green;
VideoListView.Items.Refresh();
});
tasks.Remove(data.cid);
}
return;
}
catch (Exception)
{
if (j >= 4)
{
data.Process = "0%";
data.Speed = "0KB/s";
data.state = "错误";
Dispatcher.Invoke(() =>
{
VideoListView.Items.Refresh();
});
}
}
}
}
}
catch (Exception)
{
data.Process = "0%";
data.Speed = "0KB/s";
data.state = "错误";
Dispatcher.Invoke(() =>
{
VideoListView.Items.Refresh();
});
}
}
