fix dynamic risk challenge

lib/http/api.dart

@@ -477,4 +477,10 @@ class Api {
 
   /// 获取未读动态数
   static const getUnreadDynamic = '/x/web-interface/dynamic/entrance';
+
+  /// 用户动态主页
+  static const dynamicSpmPrefix = 'https://space.bilibili.com/1/dynamic';
+
+  /// 激活buvid3
+  static const activateBuvidApi = '/x/internal/gaia-gateway/ExClimbWuzhi';
 }

lib/http/init.dart

@@ -1,7 +1,9 @@
 // ignore_for_file: avoid_print
 import 'dart:async';
+import 'dart:convert';
 import 'dart:developer';
 import 'dart:io';
+import 'dart:math' show Random;
 import 'package:cookie_jar/cookie_jar.dart';
 import 'package:dio/dio.dart';
 import 'package:dio/io.dart';
@@ -11,6 +13,7 @@ import 'package:hive/hive.dart';
 import 'package:pilipala/utils/id_utils.dart';
 import '../utils/storage.dart';
 import '../utils/utils.dart';
+import 'api.dart';
 import 'constants.dart';
 import 'interceptor.dart';
 
@@ -24,6 +27,7 @@ class Request {
   late bool enableSystemProxy;
   late String systemProxyHost;
   late String systemProxyPort;
+  static final RegExp spmPrefixExp = RegExp(r'<meta name="spm_prefix" content="([^"]+?)">');
 
   /// 设置cookie
   static setCookie() async {
@@ -51,13 +55,12 @@ class Request {
     }
     setOptionsHeaders(userInfo, userInfo != null && userInfo.mid != null);
 
-    if (cookie.isEmpty) {
     try {
-        await Request().get(HttpString.baseUrl);
+      await buvidActivate();
     } catch (e) {
       log("setCookie, ${e.toString()}");
     }
-    }
+
     final String cookieString = cookie
         .map((Cookie cookie) => '${cookie.name}=${cookie.value}')
         .join('; ');
@@ -87,6 +90,33 @@ class Request {
     dio.options.headers['referer'] = 'https://www.bilibili.com/';
   }
 
+  static Future buvidActivate() async {
+    var html = await Request().get(Api.dynamicSpmPrefix);
+    String spmPrefix = spmPrefixExp.firstMatch(html.data)!.group(1)!;
+    Random rand = Random();
+    String rand_png_end = base64.encode(
+      List<int>.generate(32, (_) => rand.nextInt(256)) +
+      List<int>.filled(4, 0) +
+      [73, 69, 78, 68] +
+      List<int>.generate(4, (_) => rand.nextInt(256))
+    );
+
+    String jsonData = json.encode({
+      '3064': 1,
+      '39c8': '${spmPrefix}.fp.risk',
+      '3c43': {
+        'adca': 'Linux',
+        'bfe9': rand_png_end.substring(rand_png_end.length - 50),
+      },
+    });
+
+    await Request().post(
+      Api.activateBuvidApi,
+      data: {'payload': jsonData},
+      options: Options(contentType: 'application/json')
+    );
+  }
+
   /*
    * config it and create
    */

lib/http/member.dart

@@ -79,6 +79,8 @@ class MemberHttp {
     String order = 'pubdate',
     bool orderAvoided = true,
   }) async {
+    String dmImgStr = Utils.base64EncodeRandomString(16, 64);
+    String dmCoverImgStr = Utils.base64EncodeRandomString(32, 128);
     Map params = await WbiSign().makSign({
       'mid': mid,
       'ps': ps,
@@ -88,7 +90,11 @@ class MemberHttp {
       'order': order,
       'platform': 'web',
       'web_location': 1550101,
-      'order_avoided': orderAvoided
+      'order_avoided': orderAvoided,
+      'dm_img_list': '[]',
+      'dm_img_str': dmImgStr.substring(0, dmImgStr.length - 2),
+      'dm_cover_img_str': dmCoverImgStr.substring(0, dmCoverImgStr.length - 2),
+      'dm_img_inter': '{"ds":[],"wh":[0,0,0],"of":[0,0,0]}',
     });
     var res = await Request().get(
       Api.memberArchive,

lib/utils/utils.dart

@@ -16,6 +16,8 @@ import '../http/index.dart';
 import '../models/github/latest.dart';
 
 class Utils {
+  static final Random random = Random();
+
   static Future<String> getCookiePath() async {
     final Directory tempDir = await getApplicationSupportDirectory();
     final String tempPath = "${tempDir.path}/.plpl/";
@@ -180,7 +182,7 @@ class Utils {
   }
 
   static String makeHeroTag(v) {
-    return v.toString() + Random().nextInt(9999).toString();
+    return v.toString() + random.nextInt(9999).toString();
   }
 
   static int duration(String duration) {
@@ -340,4 +342,15 @@ class Utils {
 
     return md5String;
   }
+
+  static List<int> generateRandomBytes(int minLength, int maxLength) {
+    return List<int>.generate(
+      random.nextInt(maxLength-minLength+1), (_) => random.nextInt(0x60) + 0x20
+    );
+  }
+
+  static String base64EncodeRandomString(int minLength, int maxLength) {
+    List<int> randomBytes = generateRandomBytes(minLength, maxLength);
+    return base64.encode(randomBytes);
+  }
 }