PeerTube/server/middlewares/cache.ts

42 lines
1.1 KiB
TypeScript

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