'use strict'
var express = require('express');
var app = express();
var mcache = require('memory-cache');
app.set('view engine', 'jade');
var cache = (duration) => {
return (req, res, next) => {
let key = '__express__' + req.originalUrl || req.url
let cachedBody = mcache.get(key)
if (cachedBody) {
res.send(cachedBody)
return
} else {
res.sendResponse = res.send
res.send = (body) => {
mcache.put(key, body, duration * 1000);
res.sendResponse(body)
}
next()
}
}
}
app.get('/', cache(10), (req, res) => {
setTimeout(() => {
res.render('index', { title: 'Hey', message: 'Hello there', date: new Date()})
}, 5000) //setTimeout was used to simulate a slow processing request
})
app.get('/user/:id', cache(10), (req, res) => {
setTimeout(() => {
if (req.params.id == 1) {
res.json({ id: 1, name: "John"})
} else if (req.params.id == 2) {
res.json({ id: 2, name: "Bob"})
} else if (req.params.id == 3) {
res.json({ id: 3, name: "Stuart"})
}
}, 3000) //setTimeout was used to simulate a slow processing request
})
app.use((req, res) => {
res.status(404).send('') //not found
})
app.listen(3000, function () {
console.log('Example app listening on port 3000!')
})Source: https://goenning.net/2016/02/10/simple-server-side-cache-for-expressjs/
