148 lines
3.7 KiB
Dart
148 lines
3.7 KiB
Dart
// Wbi签名 用于生成 REST API 请求中的 w_rid 和 wts 字段
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// https://github.com/SocialSisterYi/bilibili-API-collect/blob/master/docs/misc/sign/wbi.md
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// import md5 from 'md5'
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// import axios from 'axios'
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import 'dart:convert';
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import 'package:crypto/crypto.dart';
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import 'package:hive/hive.dart';
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import '../http/index.dart';
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import 'storage.dart';
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class WbiSign {
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static Box<dynamic> localCache = GStrorage.localCache;
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final List<int> mixinKeyEncTab = <int>[
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46,
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47,
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18,
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2,
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53,
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8,
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23,
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32,
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15,
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50,
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10,
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31,
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58,
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3,
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45,
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35,
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27,
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43,
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5,
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49,
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33,
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9,
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42,
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19,
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29,
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28,
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14,
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39,
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12,
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38,
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41,
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13,
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37,
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48,
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7,
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16,
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24,
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55,
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40,
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61,
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26,
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17,
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0,
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1,
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60,
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51,
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30,
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4,
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22,
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25,
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54,
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21,
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56,
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59,
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6,
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63,
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57,
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62,
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11,
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36,
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20,
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34,
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44,
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52
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];
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// 对 imgKey 和 subKey 进行字符顺序打乱编码
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String getMixinKey(String orig) {
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String temp = '';
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for (int i = 0; i < mixinKeyEncTab.length; i++) {
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temp += orig.split('')[mixinKeyEncTab[i] as int];
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}
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return temp.substring(0, 32);
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}
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// 为请求参数进行 wbi 签名
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Map<String, dynamic> encWbi(
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Map<String, dynamic> params, String imgKey, String subKey) {
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final String mixinKey = getMixinKey(imgKey + subKey);
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final DateTime now = DateTime.now();
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final int currTime = (now.millisecondsSinceEpoch / 1000).round();
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final RegExp chrFilter = RegExp(r"[!\'\(\)*]");
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final List<String> query = <String>[];
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final Map<String, dynamic> newParams = Map.from(params)
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..addAll({"wts": currTime}); // 添加 wts 字段
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// 按照 key 重排参数
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final List<String> keys = newParams.keys.toList()..sort();
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for (String i in keys) {
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query.add(
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'${Uri.encodeComponent(i)}=${Uri.encodeComponent(newParams[i].toString().replaceAll(chrFilter, ''))}');
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}
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final String queryStr = query.join('&');
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final String wbiSign =
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md5.convert(utf8.encode(queryStr + mixinKey)).toString(); // 计算 w_rid
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return {'wts': currTime.toString(), 'w_rid': wbiSign};
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}
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// 获取最新的 img_key 和 sub_key 可以从缓存中获取
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static Future<Map<String, dynamic>> getWbiKeys() async {
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final DateTime nowDate = DateTime.now();
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if (localCache.get(LocalCacheKey.wbiKeys) != null &&
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DateTime.fromMillisecondsSinceEpoch(
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localCache.get(LocalCacheKey.timeStamp) as int)
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.day ==
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nowDate.day) {
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final Map cacheWbiKeys = localCache.get('wbiKeys');
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return Map<String, dynamic>.from(cacheWbiKeys);
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}
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var resp =
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await Request().get('https://api.bilibili.com/x/web-interface/nav');
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var jsonContent = resp.data['data'];
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final String imgUrl = jsonContent['wbi_img']['img_url'];
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final String subUrl = jsonContent['wbi_img']['sub_url'];
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final Map<String, dynamic> wbiKeys = {
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'imgKey': imgUrl
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.substring(imgUrl.lastIndexOf('/') + 1, imgUrl.length)
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.split('.')[0],
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'subKey': subUrl
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.substring(subUrl.lastIndexOf('/') + 1, subUrl.length)
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.split('.')[0]
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};
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localCache.put(LocalCacheKey.wbiKeys, wbiKeys);
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localCache.put(LocalCacheKey.timeStamp, nowDate.millisecondsSinceEpoch);
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return wbiKeys;
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}
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Future<Map<String, dynamic>> makSign(Map<String, dynamic> params) async {
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// params 为需要加密的请求参数
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final Map<String, dynamic> wbiKeys = await getWbiKeys();
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final Map<String, dynamic> query = params
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..addAll(encWbi(params, wbiKeys['imgKey'], wbiKeys['subKey']));
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return query;
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}
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}
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