feat: Add neapi support

module/register_neapikey.js

@@ -0,0 +1,48 @@
+const { default: axios } = require('axios')
+const { APP_CONF } = require('../util/config.json')
+const { saveNeapiKey } = require('../util/neapiKey')
+const { decodeConfig } = require('../util/neapiConfig')
+
+const USER_AGENT =
+  'NeteaseMusic/9.5.61.260802021928(9005061);Dalvik/2.1.0 (Linux; U; Android 12; HBN-AL00 Build/cd737a2.0)'
+
+module.exports = async (query, request) => {
+  const version = Number(query.version) || 0
+  const behavior = query.behavior === 'update' ? 'update' : 'open'
+
+  const res = await axios({
+    method: 'GET',
+    url: APP_CONF.apiDomain + '/api/gorilla/algorithm/record',
+    params: { version, behavior },
+    headers: { 'User-Agent': USER_AGENT },
+    proxy: false,
+  })
+
+  if (!res.data || res.data.code !== 200 || !res.data.data) {
+    throw new Error('neapi config request failed')
+  }
+
+  // file 为空表示本地已是最新，无需更新
+  const { file, circleTime } = res.data.data
+  const config = file
+    ? saveNeapiKey(decodeConfig(Buffer.from(file, 'base64')), circleTime)
+    : null
+
+  // 只回版本与密钥偏移，密钥本身留在本地缓存
+  const keyOffsets = {}
+  if (config) {
+    keyOffsets.encrypt = config.keyBlob.indexOf(config.encryptKey)
+    keyOffsets.decrypt = config.keyBlob.indexOf(config.decryptKey)
+  }
+
+  return {
+    status: 200,
+    body: {
+      version: config ? config.version : res.data.data.version,
+      updated: Boolean(config),
+      circleTime,
+      keyOffsets,
+    },
+    cookie: [],
+  }
+}