related playlist recommendation

router/related_playlist.js

+//related ,相关歌单
+module.exports = (req, res, createWebAPIRequest, request) => {
+  const options = {
+    url: "http://music.163.com/playlist?id=" + req.query.id,
+    method: "GET",
+    headers: {
+      Referer: "http://music.163.com",
+      "User-Agent":
+        "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3380.0 Safari/537.36"
+    }
+  };
+  request(options, (error, response, body) => {
+    if (error) {
+      res.status(502).send("fetch error");
+    } else {
+      try {
+        const pattern = /<div class="cver u-cover u-cover-3">[\s\S]*?<img src="([^"]+)">[\s\S]*?<a class="sname f-fs1 s-fc0" href="([^"]+)"[^>]*>([^<]+?)<\/a>[\s\S]*?<a class="nm nm f-thide s-fc3" href="([^"]+)"[^>]*>([^<]+?)<\/a>/g;
+        const data = {playlists:[],code:200};
+        let result;
+        while ((result = pattern.exec(body)) != null)  {
+          data.playlists.push({
+            creator: {
+              userId: result[4].slice('/user/home?id='.length),
+              nickname: result[5]
+            },
+            coverImgUrl: result[1].slice(0,-('?param=50y50'.length)),
+            name: result[3],
+            id: result[2].slice('/playlist?id='.length)
+          });
+        }
+        res.send(JSON.stringify(data));
+      } catch (error) {
+        res.status(502).send("fetch error");
+      }
+    }
+  });
+};