Sample of Redis cached route in nodejs

app.js

app.get("/sileo-depiction/:package", async (req, res) => {
    const dep_package = req.params.package; // package name
    try {
        const redisDepKey = `${dep_package}:depiction`; // redis key

        return client.get(redisDepKey, async (err, cachedData) => { // check if cached
            if (cachedData) { // if cached
                const parsedData = JSON.parse(depiction); // parse cached data
                res.status(200).send({ // send cached data
                    httpStatus: 200,
                    success: true,
                    success_binary: 1,
                    data: parsedData,
                    message: "Successfully retrieved data from cache",
                    meta_data: {
                        time_epoch = Math.floor(Date.now() / 1000),
                        time_iso = new Date().toISOString(),
                    }
                });
            } else { // if not cached
                const firestoreQueryNonce = await firebaseService.getRelease(dep_package); // get fresh data from firestore or other persistent database
                client.setex(redisDepKey, 259200, JSON.stringify(firestoreQueryNonce)); // cache data for 3 days || redis always store data in string format
                res.status(200).send({ // send fresh data
                    httpStatus: 200,
                    success: true,
                    success_binary: 1,
                    data: firestoreQueryNonce,
                    message: "Successfully retrieved data from database",
                    meta_data: {
                        time_epoch = Math.floor(Date.now() / 1000),
                        time_iso = new Date().toISOString(),
                    }
                });
            }
        });
    } catch (error) { // if error
        console.log(error);
        res.status(500).send({ // send error acknowledgement
            httpStatus: 500,
            success: false,
            success_binary: 0,
            data: null,
            message: "could not get data",
            meta_data: {
                time_epoch = Math.floor(Date.now() / 1000),
                time_iso = new Date().toISOString(),
            }
        })
    }
});