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468 lines
21 KiB
C#
468 lines
21 KiB
C#
using System.Text;
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using System.Text.RegularExpressions;
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using System.Text.Json;
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using static BBDown.Core.Logger;
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using static BBDown.Core.Util.HTTPUtil;
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using static BBDown.Core.Entity.Entity;
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using System.Security.Cryptography;
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using BBDown.Core.Entity;
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namespace BBDown.Core;
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public static partial class Parser
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{
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public static string WbiSign(string api)
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{
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return $"{api}&w_rid=" + string.Concat(MD5.HashData(Encoding.UTF8.GetBytes(api + Config.WBI)).Select(i => i.ToString("x2")).ToArray());
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}
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private static async Task<string> GetPlayJsonAsync(string encoding, string aidOri, string aid, string cid, string epId, bool tvApi, bool intl, bool appApi, string qn = "0")
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{
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LogDebug("aid={0},cid={1},epId={2},tvApi={3},IntlApi={4},appApi={5},qn={6}", aid, cid, epId, tvApi, intl, appApi, qn);
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if (intl) return await GetPlayJsonAsync(aid, cid, epId, qn);
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bool cheese = aidOri.StartsWith("cheese:");
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bool bangumi = cheese || aidOri.StartsWith("ep:");
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LogDebug("bangumi={0},cheese={1}", bangumi, cheese);
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if (appApi) return await AppHelper.DoReqAsync(aid, cid, epId, qn, bangumi, encoding, Config.TOKEN);
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string prefix = tvApi ? bangumi ? $"{Config.TVHOST}/pgc/player/api/playurltv" : $"{Config.TVHOST}/x/tv/playurl"
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: bangumi ? $"{Config.HOST}/pgc/player/web/v2/playurl" : "api.bilibili.com/x/player/wbi/playurl";
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prefix = $"https://{prefix}?";
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string api;
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if (tvApi)
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{
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StringBuilder apiBuilder = new();
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if (Config.TOKEN != "") apiBuilder.Append($"access_key={Config.TOKEN}&");
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apiBuilder.Append($"appkey=4409e2ce8ffd12b8&build=106500&cid={cid}&device=android");
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if (bangumi) apiBuilder.Append($"&ep_id={epId}&expire=0");
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apiBuilder.Append($"&fnval=4048&fnver=0&fourk=1&mid=0&mobi_app=android_tv_yst");
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apiBuilder.Append($"&object_id={aid}&platform=android&playurl_type=1&qn={qn}&ts={GetTimeStamp(true)}");
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api = $"{prefix}{apiBuilder}&sign={GetSign(apiBuilder.ToString(), false)}";
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}
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else
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{
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// 尝试提高可读性
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StringBuilder apiBuilder = new();
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apiBuilder.Append($"support_multi_audio=true&from_client=BROWSER&avid={aid}&cid={cid}&fnval=4048&fnver=0&fourk=1");
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if (Config.AREA != "") apiBuilder.Append($"&access_key={Config.TOKEN}&area={Config.AREA}");
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apiBuilder.Append($"&otype=json&qn={qn}");
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if (bangumi) apiBuilder.Append($"&module=bangumi&ep_id={epId}&session=");
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if (Config.COOKIE == "") apiBuilder.Append("&try_look=1");
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apiBuilder.Append($"&wts={GetTimeStamp(true)}");
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api = prefix + (bangumi ? apiBuilder.ToString() : WbiSign(apiBuilder.ToString()));
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}
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//课程接口
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if (cheese) api = api.Replace("/pgc/", "/pugv/");
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//Console.WriteLine(api);
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string webJson = await GetWebSourceAsync(api);
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//以下情况从网页源代码尝试解析
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if (webJson.Contains("\"大会员专享限制\""))
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{
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Log("此视频需要大会员，您大概率需要登录一个有大会员的账号才可以下载，尝试从网页源码解析");
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string webUrl = "https://www.bilibili.com/bangumi/play/ep" + epId;
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string webSource = await GetWebSourceAsync(webUrl);
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webJson = PlayerJsonRegex().Match(webSource).Groups[1].Value;
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}
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return webJson;
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}
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private static async Task<string> GetPlayJsonAsync(string aid, string cid, string epId, string qn, string code = "0")
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{
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bool isBiliPlus = Config.HOST != "api.bilibili.com";
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string api = $"https://{(isBiliPlus ? Config.HOST : "api.biliintl.com")}/intl/gateway/v2/ogv/playurl?";
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StringBuilder paramBuilder = new();
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if (Config.TOKEN != "") paramBuilder.Append($"access_key={Config.TOKEN}&");
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paramBuilder.Append($"aid={aid}");
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if (isBiliPlus) paramBuilder.Append($"&appkey=7d089525d3611b1c&area={(Config.AREA == "" ? "th" : Config.AREA)}");
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paramBuilder.Append($"&cid={cid}&ep_id={epId}&platform=android&prefer_code_type={code}&qn={qn}");
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if (isBiliPlus) paramBuilder.Append($"&ts={GetTimeStamp(true)}");
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paramBuilder.Append("&s_locale=zh_SG");
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string param = paramBuilder.ToString();
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api += (isBiliPlus ? $"{param}&sign={GetSign(param, true)}" : param);
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string webJson = await GetWebSourceAsync(api);
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return webJson;
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}
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public static async Task<ParsedResult> ExtractTracksAsync(string aidOri, string aid, string cid, string epId, bool tvApi, bool intlApi, bool appApi, string encoding, string qn = "0")
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{
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var intlCode = "0";
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ParsedResult parsedResult = new();
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//调用解析
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parsedResult.WebJsonString = await GetPlayJsonAsync(encoding, aidOri, aid, cid, epId, tvApi, intlApi, appApi, qn);
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LogDebug(parsedResult.WebJsonString);
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startParsing:
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var respJson = JsonDocument.Parse(parsedResult.WebJsonString);
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var data = respJson.RootElement;
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//intl接口
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if (parsedResult.WebJsonString.Contains("\"stream_list\""))
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{
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int pDur = data.GetProperty("data").GetProperty("video_info").GetProperty("timelength").GetInt32() / 1000;
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var audio = data.GetProperty("data").GetProperty("video_info").GetProperty("dash_audio").EnumerateArray().ToList();
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foreach (var stream in data.GetProperty("data").GetProperty("video_info").GetProperty("stream_list").EnumerateArray())
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{
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if (stream.TryGetProperty("dash_video", out JsonElement dashVideo))
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{
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if (dashVideo.GetProperty("base_url").ToString() != "")
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{
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var videoId = stream.GetProperty("stream_info").GetProperty("quality").ToString();
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var urlList = new List<string>() { dashVideo.GetProperty("base_url").ToString() };
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urlList.AddRange(dashVideo.GetProperty("backup_url").EnumerateArray().Select(i => i.ToString()));
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Video v = new()
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{
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dur = pDur,
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id = videoId,
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dfn = Config.qualitys[videoId],
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bandwith = Convert.ToInt64(dashVideo.GetProperty("bandwidth").ToString()) / 1000,
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baseUrl = urlList.FirstOrDefault(i => !BaseUrlRegex().IsMatch(i), urlList.First()),
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codecs = GetVideoCodec(dashVideo.GetProperty("codecid").ToString()),
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size = dashVideo.TryGetProperty("size", out var sizeNode) ? Convert.ToDouble(sizeNode.ToString()) : 0
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};
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if (!parsedResult.VideoTracks.Contains(v)) parsedResult.VideoTracks.Add(v);
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}
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}
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}
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foreach (var node in audio)
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{
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var urlList = new List<string>() { node.GetProperty("base_url").ToString() };
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urlList.AddRange(node.GetProperty("backup_url").EnumerateArray().Select(i => i.ToString()));
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Audio a = new()
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{
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id = node.GetProperty("id").ToString(),
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dfn = node.GetProperty("id").ToString(),
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dur = pDur,
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bandwith = Convert.ToInt64(node.GetProperty("bandwidth").ToString()) / 1000,
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baseUrl = urlList.FirstOrDefault(i => !BaseUrlRegex().IsMatch(i), urlList.First()),
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codecs = "M4A"
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};
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if (!parsedResult.AudioTracks.Contains(a)) parsedResult.AudioTracks.Add(a);
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}
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if (intlCode == "0")
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{
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intlCode = "1";
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parsedResult.WebJsonString = await GetPlayJsonAsync(aid, cid, epId, qn, intlCode);
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goto startParsing;
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}
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return parsedResult;
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}
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// data节点一次性判断完
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string? nodeName = null;
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if (parsedResult.WebJsonString.Contains("\"result\":{"))
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{
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nodeName = "result";
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// v2
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if (parsedResult.WebJsonString.Contains("\"video_info\":{"))
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{
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nodeName = "video_info";
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}
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}
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else if (parsedResult.WebJsonString.Contains("\"data\":{")) nodeName = "data";
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var root = nodeName == null ? data : nodeName == "video_info" ? data.GetProperty("result").GetProperty(nodeName) : data.GetProperty(nodeName);
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bool bangumi = aidOri.StartsWith("ep:");
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if (parsedResult.WebJsonString.Contains("\"dash\":{")) //dash
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{
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List<JsonElement>? audio = null;
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List<JsonElement>? video = null;
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List<JsonElement>? backgroundAudio = null;
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List<JsonElement>? roleAudio = null;
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int pDur = 0;
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try { pDur = root.GetProperty("dash").GetProperty("duration").GetInt32(); } catch { }
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try { pDur = root.GetProperty("timelength").GetInt32() / 1000; } catch { }
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bool reParse = false;
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reParse:
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if (reParse)
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{
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parsedResult.WebJsonString = await GetPlayJsonAsync(encoding, aidOri, aid, cid, epId, tvApi, intlApi, appApi, GetMaxQn());
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respJson = JsonDocument.Parse(parsedResult.WebJsonString);
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data = respJson.RootElement;
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root = nodeName == null ? data : nodeName == "video_info" ? data.GetProperty("result").GetProperty(nodeName) : data.GetProperty(nodeName);
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}
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try { video = root.GetProperty("dash").GetProperty("video").EnumerateArray().ToList(); } catch { }
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try { audio = root.GetProperty("dash").GetProperty("audio").EnumerateArray().ToList(); } catch { }
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if (appApi && bangumi)
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{
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try { backgroundAudio = data.GetProperty("dubbing_info").GetProperty("background_audio").EnumerateArray().ToList(); } catch { }
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try { roleAudio = data.GetProperty("dubbing_info").GetProperty("role_audio_list").EnumerateArray().ToList(); } catch { }
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}
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//处理杜比音频
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try
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{
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if (audio != null)
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{
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if (!tvApi && root.GetProperty("dash").TryGetProperty("dolby", out JsonElement dolby))
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{
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if (dolby.TryGetProperty("audio", out JsonElement db))
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{
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audio.AddRange(db.EnumerateArray());
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}
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}
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}
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}
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catch (Exception) {; }
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//处理Hi-Res无损
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try
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{
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if (audio != null)
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{
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if (!tvApi && root.GetProperty("dash").TryGetProperty("flac", out JsonElement hiRes))
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{
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if (hiRes.TryGetProperty("audio", out JsonElement db))
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{
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if (db.ValueKind != JsonValueKind.Null)
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audio.Add(db);
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}
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}
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}
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}
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catch (Exception) {; }
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if (video != null)
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{
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foreach (var node in video)
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{
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var urlList = new List<string>() { node.GetProperty("base_url").ToString() };
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if (node.TryGetProperty("backup_url", out JsonElement element) && element.ValueKind != JsonValueKind.Null)
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{
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urlList.AddRange(element.EnumerateArray().Select(i => i.ToString()));
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}
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var videoId = node.GetProperty("id").ToString();
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Video v = new()
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{
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dur = pDur,
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id = videoId,
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dfn = Config.qualitys[videoId],
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bandwith = Convert.ToInt64(node.GetProperty("bandwidth").ToString()) / 1000,
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baseUrl = urlList.FirstOrDefault(i => !BaseUrlRegex().IsMatch(i), urlList.First()),
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codecs = GetVideoCodec(node.GetProperty("codecid").ToString()),
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size = node.TryGetProperty("size", out var sizeNode) ? Convert.ToDouble(sizeNode.ToString()) : 0
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};
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if (!tvApi && !appApi)
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{
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v.res = node.GetProperty("width").ToString() + "x" + node.GetProperty("height").ToString();
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v.fps = node.GetProperty("frame_rate").ToString();
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}
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if (!parsedResult.VideoTracks.Contains(v)) parsedResult.VideoTracks.Add(v);
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}
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}
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//此处处理免二压视频，需要单独再请求一次
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if (!reParse && !appApi)
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{
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reParse = true;
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goto reParse;
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}
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if (audio != null)
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{
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foreach (var node in audio)
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{
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var urlList = new List<string>() { node.GetProperty("base_url").ToString() };
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if (node.TryGetProperty("backup_url", out JsonElement element) && element.ValueKind != JsonValueKind.Null)
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{
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urlList.AddRange(element.EnumerateArray().Select(i => i.ToString()));
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}
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var audioId = node.GetProperty("id").ToString();
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var codecs = node.GetProperty("codecs").ToString();
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codecs = codecs switch
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{
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"mp4a.40.2" => "M4A",
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"mp4a.40.5" => "M4A",
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"ec-3" => "E-AC-3",
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"fLaC" => "FLAC",
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_ => codecs
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};
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parsedResult.AudioTracks.Add(new Audio()
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{
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id = audioId,
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dfn = audioId,
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dur = pDur,
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bandwith = Convert.ToInt64(node.GetProperty("bandwidth").ToString()) / 1000,
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baseUrl = urlList.FirstOrDefault(i => !BaseUrlRegex().IsMatch(i), urlList.First()),
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codecs = codecs
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});
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}
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}
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if (backgroundAudio != null && roleAudio != null)
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{
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foreach (var node in backgroundAudio)
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{
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var audioId = node.GetProperty("id").ToString();
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var urlList = new List<string> { node.GetProperty("base_url").ToString() };
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urlList.AddRange(node.GetProperty("backup_url").EnumerateArray().Select(i => i.ToString()));
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parsedResult.BackgroundAudioTracks.Add(new Audio()
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{
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id = audioId,
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dfn = audioId,
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dur = pDur,
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bandwith = Convert.ToInt64(node.GetProperty("bandwidth").ToString()) / 1000,
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baseUrl = urlList.FirstOrDefault(i => !BaseUrlRegex().IsMatch(i), urlList.First()),
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codecs = node.GetProperty("codecs").ToString()
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});
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}
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foreach (var role in roleAudio)
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{
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var roleAudioTracks = new List<Audio>();
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foreach (var node in role.GetProperty("audio").EnumerateArray())
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{
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var audioId = node.GetProperty("id").ToString();
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var urlList = new List<string> { node.GetProperty("base_url").ToString() };
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urlList.AddRange(node.GetProperty("backup_url").EnumerateArray().Select(i => i.ToString()));
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roleAudioTracks.Add(new Audio()
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{
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id = audioId,
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dfn = audioId,
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dur = pDur,
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bandwith = Convert.ToInt64(node.GetProperty("bandwidth").ToString()) / 1000,
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baseUrl = urlList.FirstOrDefault(i => !BaseUrlRegex().IsMatch(i), urlList.First()),
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codecs = node.GetProperty("codecs").ToString()
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});
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}
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parsedResult.RoleAudioList.Add(new AudioMaterialInfo()
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{
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title = role.GetProperty("title").ToString(),
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personName = role.GetProperty("person_name").ToString(),
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path = $"{aid}/{aid}.{cid}.{role.GetProperty("audio_id").ToString()}.m4a",
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audio = roleAudioTracks
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});
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}
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}
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}
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else if (parsedResult.WebJsonString.Contains("\"durl\":[")) //flv
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{
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//默认以最高清晰度解析
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parsedResult.WebJsonString = await GetPlayJsonAsync(encoding, aidOri, aid, cid, epId, tvApi, intlApi, appApi, GetMaxQn());
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data = JsonDocument.Parse(parsedResult.WebJsonString).RootElement;
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root = nodeName == null ? data : nodeName == "video_info" ? data.GetProperty("result").GetProperty(nodeName) : data.GetProperty(nodeName);
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string quality = "";
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string videoCodecid = "";
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string url = "";
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double size = 0;
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double length = 0;
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quality = root.GetProperty("quality").ToString();
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videoCodecid = root.GetProperty("video_codecid").ToString();
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//获取所有分段
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foreach (var node in root.GetProperty("durl").EnumerateArray())
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{
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parsedResult.Clips.Add(node.GetProperty("url").ToString());
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size += node.GetProperty("size").GetDouble();
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length += node.GetProperty("length").GetDouble();
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}
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//TV模式可用清晰度
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if (root.TryGetProperty("qn_extras", out JsonElement qnExtras))
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{
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parsedResult.Dfns.AddRange(qnExtras.EnumerateArray().Select(node => node.GetProperty("qn").ToString()));
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}
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else if (root.TryGetProperty("accept_quality", out JsonElement acceptQuality)) //非tv模式可用清晰度
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{
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parsedResult.Dfns.AddRange(acceptQuality.EnumerateArray()
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.Select(node => node.ToString())
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.Where(_qn => !string.IsNullOrEmpty(_qn)));
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}
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Video v = new()
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{
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id = quality,
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dfn = Config.qualitys[quality],
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baseUrl = url,
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codecs = GetVideoCodec(videoCodecid),
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dur = (int)length / 1000,
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size = size
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};
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if (!parsedResult.VideoTracks.Contains(v)) parsedResult.VideoTracks.Add(v);
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}
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// 番剧片头片尾转分段信息, 预计效果: 正片? -> 片头 -> 正片 -> 片尾
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if (bangumi)
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{
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if (root.TryGetProperty("clip_info_list", out JsonElement clipList))
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{
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parsedResult.ExtraPoints.AddRange(clipList.EnumerateArray().Select(clip => new ViewPoint()
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{
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title = clip.GetProperty("toastText").ToString().Replace("即将跳过", ""),
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start = clip.GetProperty("start").GetInt32(),
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end = clip.GetProperty("end").GetInt32()
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})
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);
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parsedResult.ExtraPoints.Sort((p1, p2) => p1.start.CompareTo(p2.start));
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var newPoints = new List<ViewPoint>();
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int lastEnd = 0;
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foreach (var point in parsedResult.ExtraPoints)
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{
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if (lastEnd < point.start)
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newPoints.Add(new ViewPoint() { title = "正片", start = lastEnd, end = point.start });
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newPoints.Add(point);
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lastEnd = point.end;
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}
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parsedResult.ExtraPoints = newPoints;
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}
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}
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return parsedResult;
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}
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/// <summary>
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/// 编码转换
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/// </summary>
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/// <param name="code"></param>
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/// <returns></returns>
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private static string GetVideoCodec(string code)
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{
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return code switch
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{
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"13" => "AV1",
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"12" => "HEVC",
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"7" => "AVC",
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_ => "UNKNOWN"
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};
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}
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private static string GetMaxQn()
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{
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return Config.qualitys.Keys.First();
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}
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private static string GetTimeStamp(bool bflag)
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|
{
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DateTimeOffset ts = DateTimeOffset.Now;
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return bflag ? ts.ToUnixTimeSeconds().ToString() : ts.ToUnixTimeMilliseconds().ToString();
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}
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|
|
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private static string GetSign(string parms, bool isBiliPlus)
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|
{
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string toEncode = parms + (isBiliPlus ? "acd495b248ec528c2eed1e862d393126" : "59b43e04ad6965f34319062b478f83dd");
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return string.Concat(MD5.HashData(Encoding.UTF8.GetBytes(toEncode)).Select(i => i.ToString("x2")).ToArray());
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}
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[GeneratedRegex("window.__playinfo__=([\\s\\S]*?)<\\/script>")]
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private static partial Regex PlayerJsonRegex();
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[GeneratedRegex("http.*:\\d+")]
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private static partial Regex BaseUrlRegex();
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} |