/// <summary>
/// Asynchronously retrieve video / playlist information
/// </summary>
/// <param name="ydl">
/// The client
/// </param>
/// <param name="cancellationToken">
/// The cancellation token
/// </param>
/// <returns>
/// An object containing the download information
/// </returns>
internal static async Task <DownloadInfo> GetDownloadInfoAsync(this YoutubeDL ydl, CancellationToken cancellationToken)
{
if (string.IsNullOrWhiteSpace(ydl.VideoUrl))
{
return(null);
}
List <DownloadInfo> infos = new List <DownloadInfo>();
string rawOutput = null;
// Save the original options and set the ones we need
string originalOptions = ydl.Options.Serialize();
SetInfoOptions(ydl);
// Save the original event delegates and clear the event handler
Delegate[] originalDelegates = null;
if (ydl.stdOutputEvent != null)
{
originalDelegates = ydl.stdOutputEvent.GetInvocationList();
ydl.stdOutputEvent = null;
}
// Local function for easier event handling
void ParseInfoJson(object sender, string output)
{
if (!cancellationToken.IsCancellationRequested)
{
infos.Add(DownloadInfo.CreateDownloadInfo(output));
}
rawOutput = output;
}
ydl.StandardOutputEvent += ParseInfoJson;
// Set up the command
PreparationService.SetupPrepare(ydl);
// Download the info
await DownloadService.DownloadAsync(ydl, cancellationToken);
while ((!ydl.process.HasExited || infos.Count == 0) && !cancellationToken.IsCancellationRequested)
{
await Task.Delay(1);
}
if (cancellationToken.IsCancellationRequested)
{
return(null);
}
// Set the info object
ydl.Info = infos.Count > 1 ? new MultiDownloadInfo(infos) : infos[0];
if (ydl.Info == null)
{
throw new Exception("Error parsing youtube-dl output. Raw Output:\n" + rawOutput);
}
// Set options back to what they were
ydl.Options = Options.Deserialize(originalOptions);
// Clear the event handler
ydl.stdOutputEvent = null;
// Re-subscribe to each event delegate
if (originalDelegates != null)
{
foreach (Delegate del in originalDelegates)
{
ydl.StandardOutputEvent += (EventHandler <string>)del;
}
}
return(ydl.Info);
}
/// <summary>
/// Synchronously retrieve video / playlist information
/// </summary>
/// <param name="ydl">
/// The client
/// </param>
/// <returns>
/// An object containing the download information
/// </returns>
internal static DownloadInfo GetDownloadInfo(this YoutubeDL ydl)
{
if (string.IsNullOrWhiteSpace(ydl.VideoUrl))
{
return(null);
}
List <DownloadInfo> infos = new List <DownloadInfo>();
// Save the original options and set the ones we need
string originalOptions = ydl.Options.Serialize();
SetInfoOptions(ydl);
// Save the original event delegates and clear the event handler
Delegate[] originalDelegates = null;
if (ydl.stdOutputEvent != null)
{
originalDelegates = ydl.stdOutputEvent.GetInvocationList();
ydl.stdOutputEvent = null;
}
// Local function for easier event handling
void ParseInfoJson(object sender, string output)
{
infos.Add(DownloadInfo.CreateDownloadInfo(output));
}
ydl.StandardOutputEvent += ParseInfoJson;
// Set up the command
PreparationService.SetupPrepare(ydl);
// Download the info
DownloadService.Download(ydl);
while (ydl.ProcessRunning || infos.Count == 0)
{
Thread.Sleep(1);
}
// Set the info object
ydl.Info = infos.Count > 1 ? new MultiDownloadInfo(infos) : infos[0];
// Set options back to what they were
ydl.Options = Options.Deserialize(originalOptions);
// Clear the event handler
ydl.stdOutputEvent = null;
// Re-subscribe to each event delegate
if (originalDelegates != null)
{
foreach (Delegate del in originalDelegates)
{
ydl.StandardOutputEvent += (EventHandler <string>)del;
}
}
return(ydl.Info);
}