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107 lines
2.8 KiB
Dart
107 lines
2.8 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 'package:synchronized/synchronized.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 get localCache => GStorage.localCache;
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static final Lock lock = Lock();
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static final RegExp chrFilter = RegExp(r"[!\'\(\)\*]");
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static const 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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];
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// 对 imgKey 和 subKey 进行字符顺序打乱编码
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static String getMixinKey(String orig) {
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return mixinKeyEncTab.map((i) => orig[i]).join();
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}
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// 为请求参数进行 wbi 签名
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static void encWbi(Map<String, dynamic> params, String mixinKey) {
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params['wts'] = DateTime.now().millisecondsSinceEpoch ~/ 1000;
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// 按照 key 重排参数
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final List<String> keys = params.keys.toList()..sort();
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final queryStr = keys
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.map((i) =>
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'${Uri.encodeComponent(i)}=${Uri.encodeComponent(params[i].toString().replaceAll(chrFilter, ''))}')
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.join('&');
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params['w_rid'] =
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md5.convert(utf8.encode(queryStr + mixinKey)).toString(); // 计算 w_rid
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}
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static String getFileName(String uri) {
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return uri.substring(uri.lastIndexOf('/') + 1, uri.lastIndexOf('.'));
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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<String> getWbiKeys() async {
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final DateTime nowDate = DateTime.now();
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String? mixinKey = localCache.get(LocalCacheKey.mixinKey);
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if (mixinKey != 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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return mixinKey;
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}
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final resp = await Request().get(Api.userInfo);
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if (resp.data['code'] == 0) {
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final wbiUrls = resp.data['data']['wbi_img'];
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mixinKey = getMixinKey(
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getFileName(wbiUrls['img_url']) + getFileName(wbiUrls['sub_url']));
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localCache.put(LocalCacheKey.mixinKey, mixinKey);
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localCache.put(LocalCacheKey.timeStamp, nowDate.millisecondsSinceEpoch);
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}
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return mixinKey ?? '';
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}
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static Future<Map<String, dynamic>> makSign(
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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 String mixinKey = await lock.synchronized(getWbiKeys);
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encWbi(params, mixinKey);
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return params;
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}
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}
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