internal VideoInfo(VideoInfo info)
: this(info.FormatCode, info.VideoType, info.Resolution, info.Is3D, info.AudioType, info.AudioBitrate, info.AdaptiveType)
{
}
public IEnumerator DecryptDownloadUrl(Action <string> callback, VideoInfo videoInfo)
{
IDictionary <string, string> queries = HTTPHelperYoutube.ParseQueryString(videoInfo.DownloadUrl);
if (queries.ContainsKey(SignatureQuery))
{
string encryptedSignature = queries[SignatureQuery];
//decrypted = GetDecipheredSignature( encryptedSignature);
//MagicHands.DecipherWithVersion(encryptedSignature, videoInfo.HtmlPlayerVersion);
string jsUrl = string.Format("http://s.ytimg.com/yts/jsbin/player-{0}.js", videoInfo.HtmlPlayerVersion);
yield return(StartCoroutine(DownloadUrl(jsUrl)));
string js = urlResult;
//Find "C" in this: var A = B.sig||C (B.s)
string functNamePattern = @"\""signature"",\s?([a-zA-Z0-9\$]+)\("; //Regex Formed To Find Word or DollarSign
var funcName = Regex.Match(js, functNamePattern).Groups[1].Value;
if (funcName.Contains("$"))
{
funcName = "\\" + funcName; //Due To Dollar Sign Introduction, Need To Escape
}
string funcPattern = @"(?!h\.)" + @funcName + @"=function\(\w+\)\{.*?\}"; //Escape funcName string
var funcBody = Regex.Match(js, funcPattern, RegexOptions.Singleline).Value; //Entire sig function
var lines = funcBody.Split(';'); //Each line in sig function
string idReverse = "", idSlice = "", idCharSwap = ""; //Hold name for each cipher method
string functionIdentifier = "";
string operations = "";
foreach (var line in lines.Skip(1).Take(lines.Length - 2)) //Matches the funcBody with each cipher method. Only runs till all three are defined.
{
if (!string.IsNullOrEmpty(idReverse) && !string.IsNullOrEmpty(idSlice) &&
!string.IsNullOrEmpty(idCharSwap))
{
break; //Break loop if all three cipher methods are defined
}
functionIdentifier = GetFunctionFromLine(line);
string reReverse = string.Format(@"{0}:\bfunction\b\(\w+\)", functionIdentifier); //Regex for reverse (one parameter)
string reSlice = string.Format(@"{0}:\bfunction\b\([a],b\).(\breturn\b)?.?\w+\.", functionIdentifier); //Regex for slice (return or not)
string reSwap = string.Format(@"{0}:\bfunction\b\(\w+\,\w\).\bvar\b.\bc=a\b", functionIdentifier); //Regex for the char swap.
if (Regex.Match(js, reReverse).Success)
{
idReverse = functionIdentifier; //If def matched the regex for reverse then the current function is a defined as the reverse
}
if (Regex.Match(js, reSlice).Success)
{
idSlice = functionIdentifier; //If def matched the regex for slice then the current function is defined as the slice.
}
if (Regex.Match(js, reSwap).Success)
{
idCharSwap = functionIdentifier; //If def matched the regex for charSwap then the current function is defined as swap.
}
}
foreach (var line in lines.Skip(1).Take(lines.Length - 2))
{
Match m;
functionIdentifier = GetFunctionFromLine(line);
if ((m = Regex.Match(line, @"\(\w+,(?<index>\d+)\)")).Success && functionIdentifier == idCharSwap)
{
operations += "w" + m.Groups["index"].Value + " "; //operation is a swap (w)
}
if ((m = Regex.Match(line, @"\(\w+,(?<index>\d+)\)")).Success && functionIdentifier == idSlice)
{
operations += "s" + m.Groups["index"].Value + " "; //operation is a slice
}
if (functionIdentifier == idReverse) //No regex required for reverse (reverse method has no parameters)
{
operations += "r "; //operation is a reverse
}
}
operations = operations.Trim();
string magicResult = MagicHands.DecipherWithOperations(encryptedSignature, operations);
videoInfo.DownloadUrl = HTTPHelperYoutube.ReplaceQueryStringParameter(videoInfo.DownloadUrl, SignatureQuery, magicResult);
videoInfo.RequiresDecryption = false;
callback.Invoke(videoInfo.DownloadUrl);
}
else
{
yield return(null);
}
}
