How can I implement caching in my Express.js application?

How can I implement caching in my Express.js application?

You can implement caching in Express.js using middleware like apicache or node-cache. Would you like a code example?

Yes, please provide a code example using apicache.

Sure! First, install apicache using npm. Then, you can use it like this:

const express = require('express');
const apicache = require('apicache');

const app = express();
const cache = apicache.middleware;

app.get('/data', cache('5 minutes'), (req, res) => {
    // Simulate a slow database call
    setTimeout(() => {
        res.json({ message: 'This is cached data!' });
    }, 2000);
});

app.listen(3000, () => {
    console.log('Server running on port 3000');
});

This will cache the response for 5 minutes.

What if I want to cache different routes with different durations?

You can specify different cache durations for each route by passing a different duration string to the cache middleware. For example:

app.get('/short-cache', cache('1 minute'), (req, res) => { /* ... */ });
app.get('/long-cache', cache('10 minutes'), (req, res) => { /* ... */ });