overleaf/services/clsi/app/js/ContentController.js

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JavaScript
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const Path = require('path')
const send = require('send')
const Settings = require('@overleaf/settings')
const OutputCacheManager = require('./OutputCacheManager')
const ONE_DAY_S = 24 * 60 * 60
const ONE_DAY_MS = ONE_DAY_S * 1000
function getPdfRange(req, res, next) {
const { projectId, userId, contentId, hash } = req.params
const perUserDir = userId ? `${projectId}-${userId}` : projectId
const path = Path.join(
Settings.path.outputDir,
perUserDir,
OutputCacheManager.CONTENT_SUBDIR,
contentId,
hash
)
res.setHeader('cache-control', `public, max-age=${ONE_DAY_S}`)
res.setHeader('expires', new Date(Date.now() + ONE_DAY_MS).toUTCString())
send(req, path).pipe(res)
}
module.exports = { getPdfRange }