public void CancelDownload(Download video)
{
downloadManager.CancelDownload(video);
creator.OnProgressChanged();
}
public async void Download(Download video)
{
using (var cli = Client.For(new YouTube())) //use a libvideo client to get video metadata
{
IEnumerable <YouTubeVideo> downloadLinks = null;
try
{
downloadLinks = cli.GetAllVideos(video.VideoData.Url).OrderBy(br => - br.AudioBitrate); //sort by highest audio quality
}
catch (ArgumentException)
{
video.DownloadFailed = true;
downloadManager.RemoveActive(video);
//invalid url
gui.DisplayMessage("Invalid URL!");
threadHandler.RemoveActive(Thread.CurrentThread);
Thread.CurrentThread.Abort();
}
YouTubeVideo highestQuality = null;
try
{
highestQuality = downloadLinks.First(); //grab best quality link
}
catch
{
video.DownloadFailed = true;
downloadManager.RemoveActive(video);
gui.DisplayMessage("Unable to download video");
gui.OnProgressChanged();
return;
}
//setup http web request to get video bytes
var asyncRequest = await highestQuality.GetUriAsync();
var request = (HttpWebRequest)HttpWebRequest.Create(Convert.ToString(asyncRequest));
request.AllowAutoRedirect = true;
request.Method = "GET";
request.Proxy = HttpWebRequest.DefaultWebProxy;
request.Proxy.Credentials = CredentialCache.DefaultNetworkCredentials;
//execute request and save bytes to buffer
using (var response = (HttpWebResponse)request.GetResponse())
{
var len = response.ContentLength;
var buffer = new byte[256];
using (var stream = response.GetResponseStream())
{
stream.ReadTimeout = 5000;
using (var tempbytes = new TempFile())
{
FileStream bytes = new FileStream(tempbytes.Path, FileMode.Open);
while (bytes.Length < len)
{
try
{
var read = stream.Read(buffer, 0, buffer.Length);
if (read > 0)
{
bytes.Write(buffer, 0, read);
double percentage = bytes.Length * 100 / len;
if (video.DownloadProgress != percentage)
{
video.SetDownloadProgress(percentage);
gui.OnProgressChanged();
}
}
else
{
break;
}
}
catch
{
video.DownloadFailed = true;
downloadManager.RemoveActive(video);
//thread aborted
return;
}
}
//check integrity of byte array
if (bytes.Length != len)
{
video.DownloadFailed = true;
downloadManager.RemoveActive(video);
gui.DisplayMessage("File content is corrupted!");
threadHandler.RemoveActive(Thread.CurrentThread);
Thread.CurrentThread.Abort();
}
else
{
if (video.Bitrate == 0) //video
{
video.SetConvertProgress(100);
string videoPath = Path.Combine(downloadManager.DownloadsPath, highestQuality.FullName);
File.Copy(tempbytes.Path, videoPath, true);
gui.DisplayMessage("Successful!");
}
else //mp3
{
//create temp video file to convert to mp3 and dispose of when done
TimeSpan duration = GetVideoDuration(tempbytes.Path);
string mp3Name = highestQuality.FullName + ".mp3";
string audioPath = Path.Combine(downloadManager.DownloadsPath, mp3Name);
ToMp3(tempbytes.Path, audioPath, duration, video, video.Bitrate); //convert to mp3
}
}
bytes.Dispose();
bytes.Close();
}
}
}
}
downloadManager.RemoveActive(video);
}