public async Task <FileInfo?> DownloadVideoFileAsync(string videoId)
{
VideoPlaybackAccessToken videoToken = await GetVideoPlaybackToken(HttpClient, videoId);
string videoPlaylistUrl = await GetVideoPlaylistUrl(HttpClient, videoId, videoToken);
return(await DownloadVideoFile(videoId, videoPlaylistUrl));
}
private static async Task <string> GetVideoPlaylistUrl(HttpClient httpClient, string videoId, VideoPlaybackAccessToken accessToken)
{
var request = new HttpRequestMessage()
{
Method = HttpMethod.Get,
RequestUri = new Uri($"http://usher.twitch.tv/vod/{videoId}?nauth={accessToken.Value}&nauthsig={accessToken.Signature}&allow_source=true&player=twitchweb")
};
request.Headers.Add("Client-ID", TwitchClientId);
HttpResponseMessage response = await httpClient.SendAsync(request);
response.EnsureSuccessStatusCode();
var lines = (await response.Content.ReadAsStringAsync()).Split('\n');
for (int i = 0; i < lines.Length; i++)
{
if (lines[i].Contains("#EXT-X-MEDIA") && i < lines.Length - 2)
{
return(lines[i + 2]);
}
}
return("");
}
