private async Task <StreamContext> GetStreamContextFromWatchPageAsync(VideoId videoId)
{
var watchPage = await WatchPage.GetAsync(_httpClient, videoId);
var playerConfig = watchPage.TryGetPlayerConfig();
var playerResponse =
playerConfig?.GetPlayerResponse() ??
watchPage.TryGetPlayerResponse() ??
throw VideoUnplayableException.Unplayable(videoId);
var previewVideoId = playerResponse.TryGetPreviewVideoId();
if (!string.IsNullOrWhiteSpace(previewVideoId))
{
throw VideoRequiresPurchaseException.Preview(videoId, previewVideoId);
}
var playerSourceUrl = watchPage.TryGetPlayerSourceUrl() ?? playerConfig?.GetPlayerSourceUrl();
var playerSource = !string.IsNullOrWhiteSpace(playerSourceUrl)
? await PlayerSource.GetAsync(_httpClient, playerSourceUrl)
: null;
var cipherOperations = playerSource?.GetCipherOperations().ToArray() ?? Array.Empty <ICipherOperation>();
if (!playerResponse.IsVideoPlayable())
{
throw VideoUnplayableException.Unplayable(videoId, playerResponse.TryGetVideoPlayabilityError());
}
if (playerResponse.IsLive())
{
throw VideoUnplayableException.LiveStream(videoId);
}
var streamInfoProviders = new List <IStreamInfoProvider>();
// Streams from player config
if (playerConfig != null)
{
streamInfoProviders.AddRange(playerConfig.GetStreams());
}
// Streams from player response
streamInfoProviders.AddRange(playerResponse.GetStreams());
// Streams from DASH manifest
var dashManifestUrl = playerResponse.TryGetDashManifestUrl();
if (!string.IsNullOrWhiteSpace(dashManifestUrl))
{
var dashManifest = await GetDashManifestAsync(dashManifestUrl, cipherOperations);
streamInfoProviders.AddRange(dashManifest.GetStreams());
}
return(new StreamContext(streamInfoProviders, cipherOperations));
}
/// <summary>
/// Gets the HTTP Live Stream (HLS) manifest URL for the specified video (if it's a live video stream).
/// </summary>
public async Task <string> GetHttpLiveStreamUrlAsync(VideoId videoId)
{
var videoInfoResponse = await VideoInfoResponse.GetAsync(_httpClient, videoId);
var playerResponse = videoInfoResponse.GetPlayerResponse();
if (!playerResponse.IsVideoPlayable())
{
throw VideoUnplayableException.Unplayable(videoId, playerResponse.TryGetVideoPlayabilityError());
}
return(playerResponse.TryGetHlsManifestUrl() ??
throw VideoUnplayableException.NotLiveStream(videoId));
}
