41 lines
1.1 KiB
TypeScript
41 lines
1.1 KiB
TypeScript
import * as express from 'express'
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import { Redis } from '../lib/redis'
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import { logger } from '../helpers/logger'
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async function cacheRoute (req: express.Request, res: express.Response, next: express.NextFunction) {
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const cached = await Redis.Instance.getCachedRoute(req)
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// Not cached
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if (!cached) {
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logger.debug('Not cached result for route %s.', req.originalUrl)
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const sendSave = res.send.bind(res)
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res.send = (body) => {
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if (res.statusCode >= 200 && res.statusCode < 400) {
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Redis.Instance.setCachedRoute(req, body, res.getHeader('content-type').toString(), res.statusCode)
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.catch(err => logger.error('Cannot cache route.', { err }))
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}
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return sendSave(body)
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}
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return next()
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}
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if (cached.contentType) res.contentType(cached.contentType)
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if (cached.statusCode) {
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const statusCode = parseInt(cached.statusCode, 10)
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if (!isNaN(statusCode)) res.status(statusCode)
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}
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logger.debug('Use cached result for %s.', req.originalUrl)
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return res.send(cached.body).end()
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}
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// ---------------------------------------------------------------------------
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export {
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cacheRoute
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}
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