private async Task <StreamContext> GetSteamContextFromVideoInfoAsync(VideoId videoId)
{
var embedPage = await EmbedPage.GetAsync(_httpClient, videoId);
var playerConfig =
embedPage.TryGetPlayerConfig() ??
throw VideoUnplayableException.Unplayable(videoId);
var playerSourceUrl = embedPage.TryGetPlayerSourceUrl() ?? playerConfig.GetPlayerSourceUrl();
var playerSource = await PlayerSource.GetAsync(_httpClient, playerSourceUrl);
var cipherOperations = playerSource.GetCipherOperations().ToArray();
var videoInfoResponse = await VideoInfoResponse.GetAsync(_httpClient, videoId, playerSource.GetSts());
var playerResponse = videoInfoResponse.GetPlayerResponse();
var previewVideoId = playerResponse.TryGetPreviewVideoId();
if (!string.IsNullOrWhiteSpace(previewVideoId))
{
throw VideoRequiresPurchaseException.Preview(videoId, previewVideoId);
}
if (!playerResponse.IsVideoPlayable())
{
throw VideoUnplayableException.Unplayable(videoId, playerResponse.TryGetVideoPlayabilityError());
}
if (playerResponse.IsLive())
{
throw VideoUnplayableException.LiveStream(videoId);
}
var streamInfoProviders = new List <IStreamInfoProvider>();
// Streams from video info
streamInfoProviders.AddRange(videoInfoResponse.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));
}
