+ const redisKey = Redis.Instance.generateCachedRouteKey(req)
+
+ try {
+ await lock.acquire(redisKey, async (done) => {
+ const cached = await Redis.Instance.getCachedRoute(req)
+
+ // Not cached
+ if (!cached) {
+ logger.debug('No cached results for route %s.', req.originalUrl)
+
+ const sendSave = res.send.bind(res)
+ const redirectSave = res.redirect.bind(res)
+
+ res.send = (body) => {
+ if (res.statusCode >= 200 && res.statusCode < 400) {
+ const contentType = res.get('content-type')
+ const lifetime = parseDuration(lifetimeArg)
+
+ Redis.Instance.setCachedRoute(req, body, lifetime, contentType, res.statusCode)
+ .then(() => done())
+ .catch(err => {
+ logger.error('Cannot cache route.', { err })
+ return done(err)
+ })
+ } else {
+ done()
+ }