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-rw-r--r--server/middlewares/cache.ts73
1 files changed, 8 insertions, 65 deletions
diff --git a/server/middlewares/cache.ts b/server/middlewares/cache.ts
index 091c82d92..ef8611875 100644
--- a/server/middlewares/cache.ts
+++ b/server/middlewares/cache.ts
@@ -1,73 +1,16 @@
1import * as express from 'express'
2import * as AsyncLock from 'async-lock'
3import { parseDurationToMs } from '../helpers/core-utils'
4import { Redis } from '../lib/redis' 1import { Redis } from '../lib/redis'
5import { logger } from '../helpers/logger' 2import * as apicache from 'apicache'
6 3
7const lock = new AsyncLock({ timeout: 5000 }) 4// Ensure Redis is initialized
5Redis.Instance.init()
8 6
9function cacheRoute (lifetimeArg: string | number) { 7const options = {
10 const lifetime = parseDurationToMs(lifetimeArg) 8 redisClient: Redis.Instance.getClient(),
11 9 appendKey: () => Redis.Instance.getPrefix()
12 return async function (req: express.Request, res: express.Response, next: express.NextFunction) {
13 const redisKey = Redis.Instance.generateCachedRouteKey(req)
14
15 try {
16 await lock.acquire(redisKey, async (done) => {
17 const cached = await Redis.Instance.getCachedRoute(req)
18
19 // Not cached
20 if (!cached) {
21 logger.debug('No cached results for route %s.', req.originalUrl)
22
23 const sendSave = res.send.bind(res)
24 const redirectSave = res.redirect.bind(res)
25
26 res.send = (body) => {
27 if (res.statusCode >= 200 && res.statusCode < 400) {
28 const contentType = res.get('content-type')
29
30 Redis.Instance.setCachedRoute(req, body, lifetime, contentType, res.statusCode)
31 .then(() => done())
32 .catch(err => {
33 logger.error('Cannot cache route.', { err })
34 return done(err)
35 })
36 } else {
37 done()
38 }
39
40 return sendSave(body)
41 }
42
43 res.redirect = url => {
44 done()
45
46 return redirectSave(url)
47 }
48
49 return next()
50 }
51
52 if (cached.contentType) res.set('content-type', cached.contentType)
53
54 if (cached.statusCode) {
55 const statusCode = parseInt(cached.statusCode, 10)
56 if (!isNaN(statusCode)) res.status(statusCode)
57 }
58
59 logger.debug('Use cached result for %s.', req.originalUrl)
60 res.send(cached.body).end()
61
62 return done()
63 })
64 } catch (err) {
65 logger.error('Cannot serve cached route.', { err })
66 return next()
67 }
68 }
69} 10}
70 11
12const cacheRoute = apicache.options(options).middleware
13
71// --------------------------------------------------------------------------- 14// ---------------------------------------------------------------------------
72 15
73export { 16export {