如何公开缓存来自firebase函数的数据？

const functions = require('firebase-functions');
const admin = require('firebase-admin');
const redis = require('redis');

admin.initializeApp();
const db = admin.firestore();
const redisClient = redis.createClient();

exports.getData = functions.https.onRequest(async (req, res) => {
  const key = req.query.key;

  return new Promise((resolve, reject) => {
    redisClient.get(key, async (err, data) => {
      if (err) throw err;

      if (data !== null) {
        res.send(JSON.parse(data));
      } else {
        const snapshot = await db.collection('data').doc(key).get();
        if (snapshot.exists) {
          const result = snapshot.data();
          redisClient.setex(key, 3600, JSON.stringify(result));
          res.send(result);
        } else {
          res.status(404).send('Data not found');
        }
      }
    });
  });
});