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4195cd2b C |
1 | import * as express from 'express' |
2 | import { Redis } from '../lib/redis' | |
3 | import { logger } from '../helpers/logger' | |
4 | ||
5 | async function cacheRoute (req: express.Request, res: express.Response, next: express.NextFunction) { | |
6 | const cached = await Redis.Instance.getCachedRoute(req) | |
7 | ||
8 | // Not cached | |
9 | if (!cached) { | |
10 | logger.debug('Not cached result for route %s.', req.originalUrl) | |
11 | ||
12 | const sendSave = res.send.bind(res) | |
13 | ||
14 | res.send = (body) => { | |
15 | if (res.statusCode >= 200 && res.statusCode < 400) { | |
16 | Redis.Instance.setCachedRoute(req, body, res.getHeader('content-type').toString(), res.statusCode) | |
17 | .catch(err => logger.error('Cannot cache route.', { err })) | |
18 | } | |
19 | ||
20 | return sendSave(body) | |
21 | } | |
22 | ||
23 | return next() | |
24 | } | |
25 | ||
26 | if (cached.contentType) res.contentType(cached.contentType) | |
27 | ||
28 | if (cached.statusCode) { | |
29 | const statusCode = parseInt(cached.statusCode, 10) | |
30 | if (!isNaN(statusCode)) res.status(statusCode) | |
31 | } | |
32 | ||
33 | logger.debug('Use cached result for %s.', req.originalUrl) | |
34 | return res.send(cached.body).end() | |
35 | } | |
36 | ||
37 | // --------------------------------------------------------------------------- | |
38 | ||
39 | export { | |
40 | cacheRoute | |
41 | } |