/// <summary>
/// Decrypt the signature (uses code from project "YoutubeExtractor")
/// </summary>
private string GetDecipheredSignature(string htmlPlayerVersion, string signature)
{
Decipherer decipherer = new Decipherer();
int CorrectSignatureLength = 81;
if (signature.Length == CorrectSignatureLength)
{
return(signature);
}
return(decipherer.DecipherWithVersion(signature, htmlPlayerVersion));
}
/// <summary>
/// Decrypt the signature (uses code from project "YoutubeExtractor")
/// </summary>
private string GetDecipheredSignature(string htmlPlayerVersion, string signature)
{
Decipherer decipherer = new Decipherer();
int CorrectSignatureLength = 81;
if (signature.Length == CorrectSignatureLength)
{
return signature;
}
return decipherer.DecipherWithVersion(signature, htmlPlayerVersion);
}
//private static readonly string[] elValue = {
// "",
// "detailpage",
// "embedded",
// "vevo",
//};
public static IList <VideoQuality> GetYouTubeVideoUrls(string videoUrl)
{
var list = new List <VideoQuality>();
var id = YouTubeDownloader.GetVideoIdFromUrl(videoUrl);
var longId = YouTubeDownloader.GetLongVideoIdFromUrl(videoUrl);
string stsValue = null;
bool ageGateContent = false;
string status;
string title;
string videoDuration;
string[] videos;
string infoUrl;
string infoText;
WebClient webClient = new WebClient();
webClient.Proxy = Helper.InitialProxy();
infoUrl = string.Format(CultureInfo.InvariantCulture, "https://www.youtube.com/watch?v={0}&gl=US&hl=en&has_verified=1&bpctr=9999999999", longId);
infoText = webClient.DownloadString(infoUrl);
ageGateContent = infoText.Contains("player-age-gate-content");
if (ageGateContent)
{
infoUrl = string.Format(CultureInfo.InvariantCulture, "https://www.youtube.com/embed/{0}", longId);
infoText = webClient.DownloadString(infoUrl);
stsValue = Regex.Match(infoText, @"""sts"":([0-9]+?),").Groups[1].Value;
}
if (ageGateContent && !string.IsNullOrEmpty(stsValue))
{
infoUrl = string.Format(CultureInfo.InvariantCulture, "https://www.youtube.com/get_video_info?video_id={0}&eurl=https://youtube.googleapis.com/v/{1}&sts={2}", longId, id, stsValue);
}
else
{
infoUrl = string.Format(CultureInfo.InvariantCulture, "https://www.youtube.com/get_video_info?&video_id={0}&el=detailpage&ps=default&eurl=&gl=US&hl=en", longId);
}
infoText = webClient.DownloadString(infoUrl);
webClient.Dispose();
var infoValues = HttpUtility.ParseQueryString(infoText);
#if DEBUG
Dictionary <String, String> testInfoValues = new Dictionary <string, string>();
foreach (String key in infoValues)
{
testInfoValues.Add(key, infoValues[key]);
}
#endif
String offerButtonText;
offerButtonText = infoValues["ypc_offer_button_text"];
if (offerButtonText == null)
{
offerButtonText = String.Empty;
}
else
{
offerButtonText = ", Pay " + offerButtonText;
}
status = infoValues["status"];
if (status != null && status == "fail")
{
var errorcode = infoValues["errorcode"];
var errordetail = infoValues["errordetail"];
var reason = infoValues["reason"];
bool boolDetail = false;
int intErrorCode = int.Parse(errorcode, CultureInfo.InvariantCulture);
if (errordetail != null)
{
int detail = int.Parse(errordetail, CultureInfo.InvariantCulture);
boolDetail = detail == 0 ? false : true;
}
throw new DownloaderException(reason, intErrorCode, boolDetail);
}
title = infoValues["title"];
videoDuration = infoValues["length_seconds"];
videos = infoValues["url_encoded_fmt_stream_map"].Split(',');
string html = Helper.DownloadWebPage(videoUrl);
var regex = new Regex(@"player-(.+?).js");
string playerVersion = regex.Match(html).Result("$1");
foreach (var item in videos)
{
if (String.IsNullOrEmpty(item))
{
throw new ArgumentException("Cannot download \"" + title + "\"" + offerButtonText);
}
try {
var data = HttpUtility.ParseQueryString(item);
var fallback_host = data["fallback_host"];
String server = String.Empty;
if (!String.IsNullOrEmpty(fallback_host))
{
server = Uri.UnescapeDataString(fallback_host);
}
var signature = data["sig"] ?? data["signature"] ?? data["s"]; // Hans: Added "s" for encrypted signatures
var url = Uri.UnescapeDataString(data["url"]) + "&fallback_host=" + server;
if (!string.IsNullOrEmpty(signature) && data["s"] == null)
{
url += "&signature=" + signature;
}
// If the download-URL contains encrypted signature
if (data["s"] != null)
{
string decryptedSignature;
try {
// Decrypt the signature
decryptedSignature = Decipherer.DecipherWithVersion(signature.ToString(), playerVersion);
}
catch (Exception e) {
//string ex = e.Message;
throw new DownloaderException("Signature decipher problem", e);
}
// The new download-url with decrypted signature
url += "&signature=" + decryptedSignature;
}
var size = GetSize(url);
var videoItem = new VideoQuality();
videoItem.DownloadUrl = url;
videoItem.VideoSize = size;
if (!string.IsNullOrEmpty(title))
{
videoItem.VideoTitle = title;
}
else
{
videoItem.VideoTitle = "Unknown";
}
var tagInfo = new ITagInfo(Uri.UnescapeDataString(data["itag"]));
videoItem.Dimension = tagInfo.VideoDimensions;
videoItem.Extension = tagInfo.VideoExtensions;
if (!string.IsNullOrEmpty(videoDuration))
{
videoItem.Length = long.Parse(videoDuration, CultureInfo.InvariantCulture);
}
list.Add(videoItem);
}
catch (Exception) {
//string ex = e.Message;
throw;
}
}
return(list);
}