overleaf/services/filestore/app/js/HealthCheckController.js
2020-08-10 17:01:12 +01:00

69 lines
1.7 KiB
JavaScript

const fs = require('fs')
const path = require('path')
const Settings = require('settings-sharelatex')
const streamBuffers = require('stream-buffers')
const { promisify } = require('util')
const Stream = require('stream')
const pipeline = promisify(Stream.pipeline)
const fsCopy = promisify(fs.copyFile)
const fsUnlink = promisify(fs.unlink)
const { HealthCheckError } = require('./Errors')
const FileConverter = require('./FileConverter').promises
const FileHandler = require('./FileHandler').promises
async function checkCanGetFiles() {
if (!Settings.health_check) {
return
}
const projectId = Settings.health_check.project_id
const fileId = Settings.health_check.file_id
const key = `${projectId}/${fileId}`
const bucket = Settings.filestore.stores.user_files
const buffer = new streamBuffers.WritableStreamBuffer({
initialSize: 100
})
const sourceStream = await FileHandler.getFile(bucket, key, {})
try {
await pipeline(sourceStream, buffer)
} catch (err) {
throw new HealthCheckError('failed to get health-check file', {}, err)
}
if (!buffer.size()) {
throw new HealthCheckError('no bytes written to download stream')
}
}
async function checkFileConvert() {
if (!Settings.enableConversions) {
return
}
const imgPath = path.join(Settings.path.uploadFolder, '/tiny.pdf')
let resultPath
try {
await fsCopy('./tiny.pdf', imgPath)
resultPath = await FileConverter.thumbnail(imgPath)
} finally {
if (resultPath) {
await fsUnlink(resultPath)
}
await fsUnlink(imgPath)
}
}
module.exports = {
check(req, res, next) {
Promise.all([checkCanGetFiles(), checkFileConvert()])
.then(() => res.sendStatus(200))
.catch((err) => {
next(err)
})
}
}