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poke/core/InnerTube/Utils.cs

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2022-08-05 15:33:38 -04:00
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Web;
using System.Xml;
using InnerTube.Models;
using Newtonsoft.Json.Linq;
namespace InnerTube
{
public static class Utils
{
private static string Sapisid;
private static string Psid;
private static bool UseAuthorization;
public static string GetHtmlDescription(string description) => description?.Replace("\n", "<br>") ?? "";
public static string GetMpdManifest(this YoutubePlayer player, string proxyUrl, string videoCodec = null, string audioCodec = null)
{
XmlDocument doc = new();
XmlDeclaration xmlDeclaration = doc.CreateXmlDeclaration("1.0", "UTF-8", null);
XmlElement root = doc.DocumentElement;
doc.InsertBefore(xmlDeclaration, root);
XmlElement mpdRoot = doc.CreateElement(string.Empty, "MPD", string.Empty);
mpdRoot.SetAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
mpdRoot.SetAttribute("xmlns", "urn:mpeg:dash:schema:mpd:2011");
mpdRoot.SetAttribute("xsi:schemaLocation", "urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd");
//mpdRoot.SetAttribute("profiles", "urn:mpeg:dash:profile:isoff-on-demand:2011");
mpdRoot.SetAttribute("profiles", "urn:mpeg:dash:profile:isoff-main:2011");
mpdRoot.SetAttribute("type", "static");
mpdRoot.SetAttribute("minBufferTime", "PT1.500S");
TimeSpan durationTs = TimeSpan.FromMilliseconds(double.Parse(HttpUtility
.ParseQueryString(player.Formats.First().Url.Split("?")[1])
.Get("dur")?.Replace(".", "") ?? "0"));
StringBuilder duration = new("PT");
if (durationTs.TotalHours > 0)
duration.Append($"{durationTs.Hours}H");
if (durationTs.Minutes > 0)
duration.Append($"{durationTs.Minutes}M");
if (durationTs.Seconds > 0)
duration.Append(durationTs.Seconds);
mpdRoot.SetAttribute("mediaPresentationDuration", $"{duration}.{durationTs.Milliseconds}S");
doc.AppendChild(mpdRoot);
XmlElement period = doc.CreateElement("Period");
period.AppendChild(doc.CreateComment("Audio Adaptation Set"));
XmlElement audioAdaptationSet = doc.CreateElement("AdaptationSet");
List<Format> audios;
if (audioCodec != "all")
audios = player.AdaptiveFormats
.Where(x => x.AudioSampleRate.HasValue && x.FormatId != "17" &&
(audioCodec == null || x.AudioCodec.ToLower().Contains(audioCodec.ToLower())))
.GroupBy(x => x.FormatNote)
.Select(x => x.Last())
.ToList();
else
audios = player.AdaptiveFormats
.Where(x => x.AudioSampleRate.HasValue && x.FormatId != "17")
.ToList();
audioAdaptationSet.SetAttribute("mimeType",
HttpUtility.ParseQueryString(audios.First().Url.Split("?")[1]).Get("mime"));
audioAdaptationSet.SetAttribute("subsegmentAlignment", "true");
audioAdaptationSet.SetAttribute("contentType", "audio");
foreach (Format format in audios)
{
XmlElement representation = doc.CreateElement("Representation");
representation.SetAttribute("id", format.FormatId);
representation.SetAttribute("codecs", format.AudioCodec);
representation.SetAttribute("startWithSAP", "1");
representation.SetAttribute("bandwidth",
Math.Floor((format.Filesize ?? 1) / (double)player.Duration).ToString());
XmlElement audioChannelConfiguration = doc.CreateElement("AudioChannelConfiguration");
audioChannelConfiguration.SetAttribute("schemeIdUri",
"urn:mpeg:dash:23003:3:audio_channel_configuration:2011");
audioChannelConfiguration.SetAttribute("value", "2");
representation.AppendChild(audioChannelConfiguration);
XmlElement baseUrl = doc.CreateElement("BaseURL");
baseUrl.InnerText = string.IsNullOrWhiteSpace(proxyUrl) ? format.Url : $"{proxyUrl}media/{player.Id}/{format.FormatId}";
representation.AppendChild(baseUrl);
if (format.IndexRange != null && format.InitRange != null)
{
XmlElement segmentBase = doc.CreateElement("SegmentBase");
segmentBase.SetAttribute("indexRange", $"{format.IndexRange.Start}-{format.IndexRange.End}");
segmentBase.SetAttribute("indexRangeExact", "true");
XmlElement initialization = doc.CreateElement("Initialization");
initialization.SetAttribute("range", $"{format.InitRange.Start}-{format.InitRange.End}");
segmentBase.AppendChild(initialization);
representation.AppendChild(segmentBase);
}
audioAdaptationSet.AppendChild(representation);
}
period.AppendChild(audioAdaptationSet);
period.AppendChild(doc.CreateComment("Video Adaptation Set"));
List<Format> videos;
if (videoCodec != "all")
videos = player.AdaptiveFormats.Where(x => !x.AudioSampleRate.HasValue && x.FormatId != "17" &&
(videoCodec == null || x.VideoCodec.ToLower()
.Contains(videoCodec.ToLower())))
.GroupBy(x => x.FormatNote)
.Select(x => x.Last())
.ToList();
else
videos = player.AdaptiveFormats.Where(x => x.Resolution != "audio only" && x.FormatId != "17").ToList();
XmlElement videoAdaptationSet = doc.CreateElement("AdaptationSet");
videoAdaptationSet.SetAttribute("mimeType",
HttpUtility.ParseQueryString(videos.FirstOrDefault()?.Url?.Split("?")[1] ?? "mime=video/mp4")
.Get("mime"));
videoAdaptationSet.SetAttribute("subsegmentAlignment", "true");
videoAdaptationSet.SetAttribute("contentType", "video");
foreach (Format format in videos)
{
XmlElement representation = doc.CreateElement("Representation");
representation.SetAttribute("id", format.FormatId);
representation.SetAttribute("codecs", format.VideoCodec);
representation.SetAttribute("startWithSAP", "1");
string[] widthAndHeight = format.Resolution.Split("x");
representation.SetAttribute("width", widthAndHeight[0]);
representation.SetAttribute("height", widthAndHeight[1]);
representation.SetAttribute("bandwidth",
Math.Floor((format.Filesize ?? 1) / (double)player.Duration).ToString());
XmlElement baseUrl = doc.CreateElement("BaseURL");
baseUrl.InnerText = string.IsNullOrWhiteSpace(proxyUrl) ? format.Url : $"{proxyUrl}media/{player.Id}/{format.FormatId}";
representation.AppendChild(baseUrl);
if (format.IndexRange != null && format.InitRange != null)
{
XmlElement segmentBase = doc.CreateElement("SegmentBase");
segmentBase.SetAttribute("indexRange", $"{format.IndexRange.Start}-{format.IndexRange.End}");
segmentBase.SetAttribute("indexRangeExact", "true");
XmlElement initialization = doc.CreateElement("Initialization");
initialization.SetAttribute("range", $"{format.InitRange.Start}-{format.InitRange.End}");
segmentBase.AppendChild(initialization);
representation.AppendChild(segmentBase);
}
videoAdaptationSet.AppendChild(representation);
}
period.AppendChild(videoAdaptationSet);
period.AppendChild(doc.CreateComment("Subtitle Adaptation Sets"));
foreach (Subtitle subtitle in player.Subtitles ?? Array.Empty<Subtitle>())
{
period.AppendChild(doc.CreateComment(subtitle.Language));
XmlElement adaptationSet = doc.CreateElement("AdaptationSet");
adaptationSet.SetAttribute("mimeType", "text/vtt");
adaptationSet.SetAttribute("lang", subtitle.Language);
XmlElement representation = doc.CreateElement("Representation");
representation.SetAttribute("id", $"caption_{subtitle.Language.ToLower()}");
representation.SetAttribute("bandwidth", "256"); // ...why do we need this for a plaintext file
XmlElement baseUrl = doc.CreateElement("BaseURL");
string url = subtitle.Url;
url = url.Replace("fmt=srv3", "fmt=vtt");
baseUrl.InnerText = string.IsNullOrWhiteSpace(proxyUrl) ? url : $"{proxyUrl}caption/{player.Id}/{subtitle.Language}";
representation.AppendChild(baseUrl);
adaptationSet.AppendChild(representation);
period.AppendChild(adaptationSet);
}
mpdRoot.AppendChild(period);
return doc.OuterXml.Replace(" schemaLocation=\"", " xsi:schemaLocation=\"");
}
public static async Task<string> GetHlsManifest(this YoutubePlayer player, string proxyUrl)
{
StringBuilder sb = new StringBuilder();
sb.AppendLine("#EXTM3U");
sb.AppendLine("##Generated by LightTube");
sb.AppendLine("##Video ID: " + player.Id);
sb.AppendLine("#EXT-X-VERSION:7");
sb.AppendLine("#EXT-X-INDEPENDENT-SEGMENTS");
string hls = await new HttpClient().GetStringAsync(player.HlsManifestUrl);
string[] hlsLines = hls.Split("\n");
foreach (string line in hlsLines)
{
if (line.StartsWith("#EXT-X-STREAM-INF:"))
sb.AppendLine(line);
if (line.StartsWith("http"))
{
Uri u = new(line);
sb.AppendLine($"{proxyUrl}/ytmanifest?path={HttpUtility.UrlEncode(u.PathAndQuery)}");
}
}
return sb.ToString();
}
public static string ReadRuns(JArray runs)
{
string str = "";
foreach (JToken runToken in runs ?? new JArray())
{
JObject run = runToken as JObject;
if (run is null) continue;
if (run.ContainsKey("bold"))
{
str += "<b>" + run["text"] + "</b>";
}
else if (run.ContainsKey("navigationEndpoint"))
{
if (run?["navigationEndpoint"]?["urlEndpoint"] is not null)
{
string url = run["navigationEndpoint"]?["urlEndpoint"]?["url"]?.ToString() ?? "";
if (url.StartsWith("https://www.youtube.com/redirect"))
{
NameValueCollection qsl = HttpUtility.ParseQueryString(url.Split("?")[1]);
url = qsl["url"] ?? qsl["q"];
}
str += $"<a href=\"{url}\">{run["text"]}</a>";
}
else if (run?["navigationEndpoint"]?["commandMetadata"] is not null)
{
string url = run["navigationEndpoint"]?["commandMetadata"]?["webCommandMetadata"]?["url"]
?.ToString() ?? "";
if (url.StartsWith("/"))
url = "https://youtube.com" + url;
str += $"<a href=\"{url}\">{run["text"]}</a>";
}
}
else
{
str += run["text"];
}
}
return str;
}
public static Thumbnail ParseThumbnails(JToken arg) => new()
{
Height = arg["height"]?.ToObject<long>() ?? -1,
Url = arg["url"]?.ToString() ?? string.Empty,
Width = arg["width"]?.ToObject<long>() ?? -1
};
public static async Task<JObject> GetAuthorizedPlayer(string id, HttpClient client)
{
HttpRequestMessage hrm = new(HttpMethod.Post,
"https://www.youtube.com/youtubei/v1/player?key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8");
byte[] buffer = Encoding.UTF8.GetBytes(
RequestContext.BuildRequestContextJson(new Dictionary<string, object>
{
["videoId"] = id
}));
ByteArrayContent byteContent = new(buffer);
byteContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
hrm.Content = byteContent;
if (UseAuthorization)
{
hrm.Headers.Add("Cookie", GenerateAuthCookie());
hrm.Headers.Add("User-Agent", "Mozilla/5.0 (X11; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0");
hrm.Headers.Add("Authorization", GenerateAuthHeader());
hrm.Headers.Add("X-Origin", "https://www.youtube.com");
hrm.Headers.Add("X-Youtube-Client-Name", "1");
hrm.Headers.Add("X-Youtube-Client-Version", "2.20210721.00.00");
hrm.Headers.Add("Accept-Language", "en-US;q=0.8,en;q=0.7");
hrm.Headers.Add("Origin", "https://www.youtube.com");
hrm.Headers.Add("Referer", "https://www.youtube.com/watch?v=" + id);
}
HttpResponseMessage ytPlayerRequest = await client.SendAsync(hrm);
return JObject.Parse(await ytPlayerRequest.Content.ReadAsStringAsync());
}
internal static string GenerateAuthHeader()
{
if (!UseAuthorization) return "None none";
long timestamp = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
string hashInput = timestamp + " " + Sapisid + " https://www.youtube.com";
string hashDigest = GenerateSha1Hash(hashInput);
return $"SAPISIDHASH {timestamp}_{hashDigest}";
}
internal static string GenerateAuthCookie() => UseAuthorization ? $"SAPISID={Sapisid}; __Secure-3PAPISID={Sapisid}; __Secure-3PSID={Psid};" : ";";
private static string GenerateSha1Hash(string input)
{
using SHA1Managed sha1 = new();
byte[] hash = sha1.ComputeHash(Encoding.UTF8.GetBytes(input));
StringBuilder sb = new(hash.Length * 2);
foreach (byte b in hash) sb.Append(b.ToString("X2"));
return sb.ToString();
}
public static string GetExtension(this Format format)
{
if (format.VideoCodec != "none") return "mp4";
else
switch (format.FormatId)
{
case "139":
case "140":
case "141":
case "256":
case "258":
case "327":
return "mp3";
case "249":
case "250":
case "251":
case "338":
return "opus";
}
return "mp4";
}
public static void SetAuthorization(bool canUseAuthorizedEndpoints, string sapisid, string psid)
{
UseAuthorization = canUseAuthorizedEndpoints;
Sapisid = sapisid;
Psid = psid;
}
internal static string GetCodec(string mimetypeString, bool audioCodec)
{
string acodec = "";
string vcodec = "";
Match match = Regex.Match(mimetypeString, "codecs=\"([\\s\\S]+?)\"");
string[] g = match.Groups[1].ToString().Split(",");
foreach (string codec in g)
{
switch (codec.Split(".")[0].Trim())
{
case "avc1":
case "av01":
case "vp9":
case "mp4v":
vcodec = codec;
break;
case "mp4a":
case "opus":
acodec = codec;
break;
default:
Console.WriteLine("Unknown codec type: " + codec.Split(".")[0].Trim());
break;
}
}
return (audioCodec ? acodec : vcodec).Trim();
}
public static string GetFormatName(JToken formatToken)
{
string format = formatToken["itag"]?.ToString() switch
{
"160" => "144p",
"278" => "144p",
"330" => "144p",
"394" => "144p",
"694" => "144p",
"133" => "240p",
"242" => "240p",
"331" => "240p",
"395" => "240p",
"695" => "240p",
"134" => "360p",
"243" => "360p",
"332" => "360p",
"396" => "360p",
"696" => "360p",
"135" => "480p",
"244" => "480p",
"333" => "480p",
"397" => "480p",
"697" => "480p",
"136" => "720p",
"247" => "720p",
"298" => "720p",
"302" => "720p",
"334" => "720p",
"398" => "720p",
"698" => "720p",
"137" => "1080p",
"299" => "1080p",
"248" => "1080p",
"303" => "1080p",
"335" => "1080p",
"399" => "1080p",
"699" => "1080p",
"264" => "1440p",
"271" => "1440p",
"304" => "1440p",
"308" => "1440p",
"336" => "1440p",
"400" => "1440p",
"700" => "1440p",
"266" => "2160p",
"305" => "2160p",
"313" => "2160p",
"315" => "2160p",
"337" => "2160p",
"401" => "2160p",
"701" => "2160p",
"138" => "4320p",
"272" => "4320p",
"402" => "4320p",
"571" => "4320p",
var _ => $"{formatToken["height"]}p",
};
return format == "p"
? formatToken["audioQuality"]?.ToString().ToLowerInvariant()
: (formatToken["fps"]?.ToObject<int>() ?? 0) > 30
? $"{format}{formatToken["fps"]}"
: format;
}
}
}