Merge pull request #595 from My-Responsitories/master

fix space video
nilaoda · May 26, 2023 · dc33f2f · dc33f2f
2 parents 7125539 + b2f53e5
commit dc33f2f
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Showing 3 changed files with 53 additions and 11 deletions.
diff --git a/BBDown.Core/Fetcher/SpaceVideoFetcher.cs b/BBDown.Core/Fetcher/SpaceVideoFetcher.cs
@@ -1,4 +1,7 @@
 using BBDown.Core.Entity;
+using System;
+using System.Security.Cryptography;
+using System.Text;
 using System.Text.Json;
 using static BBDown.Core.Util.HTTPUtil;
 using static BBDown.Core.Logger;
@@ -7,15 +10,25 @@ namespace BBDown.Core.Fetcher
 {
     public class SpaceVideoFetcher : IFetcher
     {
+        public static string WbiSign(string api, string wbi)
+        {
+            return $"{api}&w_rid=" + string.Concat(MD5.HashData(Encoding.UTF8.GetBytes(api + wbi)).Select(i => i.ToString("x2")).ToArray());
+        }
+
         public async Task<VInfo> FetchAsync(string id)
         {
             id = id[4..];
-            string userInfoApi = $"https://api.bilibili.com/x/space/acc/info?mid={id}&jsonp=jsonp";
-            string userName = GetValidFileName(JsonDocument.Parse(await GetWebSourceAsync(userInfoApi)).RootElement.GetProperty("data").GetProperty("name").ToString(), ".", true);
+            string[] tmp = id.Split("|");
+            id = tmp[0];
+            var wbi = tmp[1];
+            // using the live API can bypass w_rid
+            string userInfoApi = $"https://api.live.bilibili.com/live_user/v1/Master/info?uid={id}";
+            string userName = GetValidFileName(JsonDocument.Parse(await GetWebSourceAsync(userInfoApi)).RootElement.GetProperty("data").GetProperty("info").GetProperty("uname").ToString(), ".", true);
             List<string> urls = new();
             int pageSize = 50;
             int pageNumber = 1;
-            string api = $"https://api.bilibili.com/x/space/arc/search?mid={id}&ps={pageSize}&tid=0&pn={pageNumber}&keyword=&order=pubdate&jsonp=jsonp";
+            var api = WbiSign($"mid={id}&order=pubdate&pn={pageNumber}&ps={pageSize}&tid=0&wts={DateTimeOffset.Now.ToUnixTimeSeconds().ToString()}", wbi);
+            api = $"https://api.bilibili.com/x/space/wbi/arc/search?{api}";
             string json = await GetWebSourceAsync(api);
             var infoJson = JsonDocument.Parse(json);
             var pages = infoJson.RootElement.GetProperty("data").GetProperty("list").GetProperty("vlist").EnumerateArray();
@@ -28,7 +41,7 @@ public async Task<VInfo> FetchAsync(string id)
             while (pageNumber < totalPage)
             {
                 pageNumber++;
-                urls.AddRange(await GetVideosByPageAsync(pageNumber, pageSize,  id));
+                urls.AddRange(await GetVideosByPageAsync(pageNumber, pageSize, id, wbi));
             }
             File.WriteAllText($"{userName}的投稿视频.txt", string.Join('\n', urls));
             Log("目前下载器不支持下载用户的全部投稿视频，不过程序已经获取到了该用户的全部投稿视频地址，你可以自行使用批处理脚本等手段调用本程序进行批量下载。如在Windows系统你可以使用如下代码：");
@@ -40,10 +53,11 @@ public async Task<VInfo> FetchAsync(string id)
             throw new Exception("暂不支持该功能");
         }
 
-        static async Task<List<string>> GetVideosByPageAsync(int pageNumber, int pageSize, string mid)
+        static async Task<List<string>> GetVideosByPageAsync(int pageNumber, int pageSize, string mid, string wbi)
         {
             List<string> urls = new();
-            string api = $"https://api.bilibili.com/x/space/arc/search?mid={mid}&ps={pageSize}&tid=0&pn={pageNumber}&keyword=&order=pubdate&jsonp=jsonp";
+            var api = WbiSign($"mid={mid}&order=pubdate&pn={pageNumber}&ps={pageSize}&tid=0&wts={DateTimeOffset.Now.ToUnixTimeSeconds().ToString()}", wbi);
+            api = $"https://api.bilibili.com/x/space/wbi/arc/search?{api}";
             string json = await GetWebSourceAsync(api);
             var infoJson = JsonDocument.Parse(json);
             var pages = infoJson.RootElement.GetProperty("data").GetProperty("list").GetProperty("vlist").EnumerateArray();

diff --git a/BBDown/BBDownUtil.cs b/BBDown/BBDownUtil.cs
@@ -795,18 +795,44 @@ public static string GetMp4boxMetaString(List<ViewPoint> points)
             return searchPath.Concat(envPath).Select(p => Path.Combine(p, name + fileExt)).FirstOrDefault(File.Exists);
         }
 
-        public static async Task<bool> CheckLogin(string cookie)
+        public static string RSubString(string sub)
+        {
+            sub = sub[(sub.LastIndexOf("/") + 1)..];
+            return sub[..sub.LastIndexOf(".")];
+        }
+
+        public static string GetMixinKey(string orig)
+        {
+            byte[] mixinKeyEncTab = new byte[]
+            {
+                46, 47, 18, 2, 53, 8, 23, 32, 15, 50, 10, 31, 58, 3, 45, 35,
+                27, 43, 5, 49, 33, 9, 42, 19, 29, 28, 14, 39, 12, 38, 41, 13
+            };
+
+            var tmp = new StringBuilder();
+            foreach (var index in mixinKeyEncTab)
+            {
+                tmp.Append(orig[index]);
+            }
+            return tmp.ToString();
+        }
+
+        public static async Task<(bool, string)> CheckLogin(string cookie)
         {
             try
             {
                 var api = "https://api.bilibili.com/x/web-interface/nav";
                 var source = await GetWebSourceAsync(api);
                 var json = JsonDocument.Parse(source).RootElement;
-                return json.GetProperty("data").GetProperty("isLogin").GetBoolean();
+                var is_login = json.GetProperty("data").GetProperty("isLogin").GetBoolean();
+                var wbi_img = json.GetProperty("data").GetProperty("wbi_img");
+                var wbi = GetMixinKey(RSubString(wbi_img.GetProperty("img_url").GetString()) + RSubString(wbi_img.GetProperty("sub_url").GetString()));
+                LogDebug($"wbi: {wbi}");
+                return (is_login, wbi);
             }
             catch (Exception)
             {
-                return false;
+                return (false, "");
             }
         }
 

diff --git a/BBDown/Program.cs b/BBDown/Program.cs
@@ -1,4 +1,4 @@
-using QRCoder;
+using QRCoder;
 using System;
 using System.Collections.Generic;
 using System.CommandLine;
@@ -314,10 +314,11 @@ private static async Task DoWorkAsync(MyOption myOption)
                 }
 
                 // 检测是否登录了账号
+                (bool is_login, string wbi) = await CheckLogin(Config.COOKIE);
                 if (!intlApi && !tvApi && Config.AREA == "")
                 {
                     Log("检测账号登录...");
-                    if (!await CheckLogin(Config.COOKIE))
+                    if (!is_login)
                     {
                         LogWarn("你尚未登录B站账号, 解析可能受到限制");
                     }
@@ -370,6 +371,7 @@ private static async Task DoWorkAsync(MyOption myOption)
                 else if (aidOri.StartsWith("mid"))
                 {
                     fetcher = new SpaceVideoFetcher();
+                    aidOri += $"|{wbi}";
                 }
                 else if (aidOri.StartsWith("listBizId"))
                 {