private async Task<bool> Process()
{
// get html as string
string pageHtml = await new StreamReader(Response.GetResponseStream()).ReadToEndAsync();
// get json from html
Match match = Regex.Match(pageHtml, "ytplayer.config *?= *?({.+?});");
if (match.Success)
{
JObject json = JObject.Parse(match.Groups[1].Value);
_title = json["args"]["title"].ToString();
string[] rawQualities = json["args"]["adaptive_fmts"].ToString().Split(new char[] {','});
List<YouTubeFile> qualities = new List<YouTubeFile>(rawQualities.Length);
foreach (string rawQuality in rawQualities)
{
qualities.Add(new YouTubeFile(rawQuality));
}
_hqVideo = YouTubeFile.HighestQualityMP4Video(qualities);
_hqAudio = YouTubeFile.HighestQualityMP4Audio(qualities);
Console.WriteLine("Video\nitag: {0}\nbitrate: {1}\nurl:{2}\n\n",
_hqVideo.Itag,
_hqVideo.Bitrate,
_hqAudio.Url);
Console.WriteLine("Audio\nitag: {0}\nbitrate: {1}\nurl:{2}\n\n",
_hqAudio.Itag,
_hqAudio.Bitrate,
_hqAudio.Url);
if (String.IsNullOrEmpty(_hqVideo.Signature) || String.IsNullOrEmpty(_hqAudio.Signature))
{
await downloadDecipheringFunction(json["assets"]["js"].ToString());
}
return true;
}
return false;
}
private Uri generateUrl(YouTubeFile file)
{
if (String.IsNullOrEmpty(file.S))
{
return new Uri(String.Format("{0}&ratebypass=yes", file.Url));
}
else
{
string signature = decipherSignature(file.S);
// add ratebypass and signature arguments to url
return new Uri(String.Format("{0}&ratebypass=yes&signature={1}", file.Url, signature));
}
}