private static async void OnHtmlDownloaded(string response, YouTubeQuality minQuality, YouTubeQuality maxQuality, DecryptSignatureMode decryptSignatureMode, Action<YouTubeUri, Exception> completed)
{
var urls = new List<YouTubeUri>();
if (sigCodes != null && sigCodes.Count > 0)
sigCodes.Clear();
javaScriptCode = string.Empty;
try
{
//var match = Regex.Match(response, "url_encoded_fmt_stream_map\": \"(.*?)\"");
var match = Regex.Match(response, "url_encoded_fmt_stream_map\"\\s*:\\s*\"(.*?)\"");
var data = Uri.UnescapeDataString(match.Groups[1].Value);
match = Regex.Match(response, "adaptive_fmts\": \"(.*?)\"");
var data2 = Uri.UnescapeDataString(match.Groups[1].Value);
var arr = Regex.Split(data + "," + data2, ",(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)"); // split by comma but outside quotes
foreach (var d in arr)
{
var url = "";
var signature = "";
var tuple = new YouTubeUri();
foreach (var p in d.Replace("\\u0026", "\t").Split('\t'))
{
var index = p.IndexOf('=');
if (index != -1 && index < p.Length)
{
try
{
var key = p.Substring(0, index);
var value = Uri.UnescapeDataString(p.Substring(index + 1));
if (key == "url")
url = value;
else if (key == "itag")
tuple.Itag = int.Parse(value);
//else if (key == "type" && (value.Contains("video/mp4") || value.Contains("audio/mp4"))) //只获取Mp4
else if (key == "type") //获取全部
tuple.Type = value;
else if (key == "s")
{
if (decryptSignatureMode == DecryptSignatureMode.DecryptLocalSignature)
signature = await DecryptLocalSignature(value, response);
else
signature = await DecryptWebSignature(value);
}
else if (key == "sig")
signature = value;
}
catch (Exception exception)
{
Debug.WriteLine("YouTube parse exception: " + exception.Message);
}
}
}
if (url.Contains("&signature=") || url.Contains("?signature="))
tuple.url = url;
else
tuple.url = url + "&signature=" + signature;
if (tuple.IsValid)
urls.Add(tuple);
}
var minTag = GetQualityIdentifier(minQuality);
var maxTag = GetQualityIdentifier(maxQuality);
//foreach (var u in urls.Where(u => u.Itag < minTag || u.Itag > maxTag).ToArray()) //得到相对命中的,如果没用命中绝对项,会找到目标项[上一级或下一级(相邻)]的项
foreach (var u in urls.Where(u => u.Itag <= minTag || u.Itag >= maxTag).ToArray()) //得到绝对命中的
urls.Remove(u);
}
catch (Exception ex)
{
if (completed != null)
completed(null, ex);
return;
}
var entry = urls.OrderByDescending(u => u.Itag).FirstOrDefault();
if (entry != null)
{
if (completed != null)
completed(entry, null);
}
else if (completed != null)
//completed(null, new Exception("no_video_urls_found"));
completed(entry, null);
}
public static async Task<YouTubeUri> GetVideoUriAsync(string youTubeId, YouTubeQuality maxQuality = YouTubeQuality.Quality360P_MP4, DecryptSignatureMode decryptSignatureMode = DecryptSignatureMode.DecryptLocalSignature)
{
//HttpClientHandler handler = new HttpClientHandler();
//handler.UseDefaultCredentials = true;
//handler.AllowAutoRedirect = true;
//handler.CookieContainer = new CookieContainer();
//using (var client = new HttpClient(handler))
using (var client = new HttpClient())
{
//client.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)");
//client.DefaultRequestHeaders.Add("Accept", "text/html");
client.DefaultRequestHeaders.Add("User-Agent", BotUserAgent);
var response = await client.GetAsync("https://www.youtube.com/watch?v=" + youTubeId + "&nomobile=1");
var task = new TaskCompletionSource<YouTubeUri>();
OnHtmlDownloaded(await response.Content.ReadAsStringAsync(), YouTubeQuality.QualityMP3_FLV_22KHZ, maxQuality, decryptSignatureMode, (u, e) =>
{
if (u != null)
task.SetResult(u);
else if (e == null)
task.SetResult(u);
//task.SetCanceled();
else
task.SetException(e);
});
return await task.Task;
}
}
public static async Task<List<YouTubeUri>> GetVideoAllUrisAsync(string youTubeId, YouTubeFormat youTubeFormat = YouTubeFormat.All, DecryptSignatureMode decryptSignatureMode = DecryptSignatureMode.DecryptLocalSignature)
{
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Add("User-Agent", BotUserAgent);
var response = await client.GetAsync("https://www.youtube.com/watch?v=" + youTubeId + "&nomobile=1");
var task = new TaskCompletionSource<List<YouTubeUri>>();
OnHtmlParse(await response.Content.ReadAsStringAsync(), decryptSignatureMode, (u, e) =>
{
if (u != null)
{
List<YouTubeUri> result = null;
if (youTubeFormat == YouTubeFormat.All)
{
result = u;
}
else if (youTubeFormat == YouTubeFormat.Flv || youTubeFormat == YouTubeFormat.Mp3)
{
//List<int> result = u.Select(uAll => uAll.Itag).Concat(FormatCodeFlvOrMp3).ToList();
result = (from uAll in u
from flvOrMp3 in FormatCodeFlvOrMp3
where uAll.Itag == flvOrMp3
select uAll).ToList();
}
else if (youTubeFormat == YouTubeFormat.Mp4)
{
result = (from uAll in u
from mp4 in FormatCodeMp4
where uAll.Itag == mp4
select uAll).ToList();
}
else if (youTubeFormat == YouTubeFormat.MP4OrFlv_mp3)
{
result = (from uAll in u
from mP4OrFlv_mp3 in FormatCodeMP4OrFlv_mp3
where uAll.Itag == mP4OrFlv_mp3
select uAll).ToList();
}
else
{
result = (from uAll in u
from quality in FormatCodeQuality
where uAll.Itag == quality
select uAll).ToList();
}
task.SetResult(result);
}
else if (e == null)
{
//task.SetCanceled();
task.SetResult(u);
}
else
task.SetException(e);
});
return await task.Task;
}
}
