简化路由导出方式

router/playlist_tracks.js

@@ -1,8 +1,5 @@
-const express = require("express");
-const router = express();
-const { createWebAPIRequest } = require("../util/util");
 //收藏单曲到歌单，从歌单删除歌曲 op=del,add;pid=歌单id,tracks=歌曲id
-router.get("/", (req, res) => {
+module.exports = (req, res, createWebAPIRequest, request) => {
   const op = req.query.op;
   const pid = req.query.pid;
   // const tracks = req.query.tracks.split(',')
@@ -27,6 +24,4 @@ router.get("/", (req, res) => {
     music_req => res.send(music_req),
     err => res.status(502).send("fetch error")
   );
-});
-
-module.exports = router;
+};