private static void onDownloadFileCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
{
bool sucFlag = true;
if (e.Cancelled)
{
Center.Logg("下载被取消");
Center.Mainw.setDownloadStatus("下载被取消");
sucFlag = false;
try
{ File.Delete(dlItem.FilePath); }
catch (Exception) { }
}
else if (e.Error != null)
{
Center.Logg("下载出错 " + e.Error.Message, true, true);
Center.Mainw.setDownloadStatus("下载出错 " + e.Error.Message);
sucFlag = false;
}
if (sucFlag)
{
Center.Logg("歌曲下载 下载成功：" + dlItem._SongName, false, true);
Center.Mainw.setDownloadStatus("下载完毕");
dlItem.setStatus(SongItem.SongStatus.WaitingPlay);
}
else
{
Center.RemoveSong(dlItem);
}
DownloadWatchDog.Stop();
wc = null;
downloadFlag = false; // 允许进行下一首歌的下载
}
private static void onDownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
{
//lock(downloadSpeedLock)
//{
//计算实时下载速度
DateTime now = DateTime.Now;
TimeSpan interval = now - lastUpdateTime;
if (interval.TotalSeconds < 0.5)
{
return;
}
double timeDiff = interval.TotalSeconds;
long sizeDiff = e.BytesReceived - lastUpdateDownloadedSize;
lastUpdateDownloadedSize = e.BytesReceived;
lastUpdateTime = now;
int speed_now = (int)Math.Floor(sizeDiff / timeDiff);
// 计算平均下载速度
string speed_avg = string.Format("{0} kb/s", (e.BytesReceived / 1024d / sw.Elapsed.TotalSeconds).ToString("0.00"));
// 下载内容百分比
string baifenbi = e.ProgressPercentage.ToString() + "%";
// 下载大小
string downloadSize = string.Format("{0} MB / {1} MB", (e.BytesReceived / 1024d / 1024d).ToString("0.00"),
(e.TotalBytesToReceive / 1024d / 1024d).ToString("0.00"));
DownloadWatchDog.UpdateStatus(speed_now, e.BytesReceived, e.TotalBytesToReceive);
Center.Mainw.setDownloadStatus($"实时速度：{ string.Format("{0} kb/s", (speed_now / 1024d).ToString("0.00")) } 百分比：{ baifenbi } 大小：{ downloadSize}");
//}
}
private static void Download(SongItem item)
{
try
{ Directory.CreateDirectory(Config.SongsCachePath); }
catch (Exception) { }
dlItem = item;
dlItem.setStatus(SongItem.SongStatus.Downloading);
if (item.Module.HandleDownlaod) // 如果搜索模块负责下载文件
{
Center.Mainw.setDownloadStatus("由搜索模块负责下载中");
switch (item.Module.SafeDownload(item))
{
case 1: // 下载成功
dlItem.setStatus(SongItem.SongStatus.WaitingPlay);
Center.Logg("歌曲下载 下载成功：" + item._SongName);
Center.Mainw.setDownloadStatus("搜索模块返回下载成功");
return;
case 0: // 下载失败 错误信息由module输出
default:
Center.RemoveSong(item);
Center.Mainw.setDownloadStatus("搜索模块返回下载失败");
return;
}
}
else // 如果搜索模块不负责下载文件
{
wc = new WebClient();
wc.DownloadProgressChanged += onDownloadProgressChanged;
wc.DownloadFileCompleted += onDownloadFileCompleted;
wc.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.450 Safari/537.35");
try
{
sw.Reset();
lastUpdateDownloadedSize = 0;
lastUpdateTime = DateTime.Now;
wc.DownloadFileAsync(new Uri(item._DownloadURL), item._FilePath);
Center.Mainw.setDownloadStatus("正在连接服务器");
sw.Start();
DownloadWatchDog.Start();
downloadFlag = true; // 正在下载歌曲
}
catch (Exception ex)
{
sw.Reset();
Center.Logg("下载歌曲" + item._SongName + "出错：" + ex.Message, true, true);
Center.Mainw.setDownloadStatus("下载失败：" + ex.Message);
}
while (downloadFlag)
{
Thread.Sleep(500);
}
dlItem = null;
}
}
private static void InitDowndloder()
{
DownloadControl.Init();
DownloadWatchDog.Init();
}