mirror of
https://github.com/overleaf/overleaf.git
synced 2024-12-01 14:41:33 -05:00
559 lines
17 KiB
JavaScript
559 lines
17 KiB
JavaScript
/* eslint-disable
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handle-callback-err,
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*/
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// TODO: This file was created by bulk-decaffeinate.
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// Fix any style issues and re-enable lint.
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/*
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* decaffeinate suggestions:
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* DS101: Remove unnecessary use of Array.from
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* DS102: Remove unnecessary code created because of implicit returns
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* DS103: Rewrite code to no longer use __guard__
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* DS104: Avoid inline assignments
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* DS204: Change includes calls to have a more natural evaluation order
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* DS207: Consider shorter variations of null checks
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* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
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*/
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let OutputCacheManager
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const async = require('async')
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const fs = require('fs')
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const fse = require('fs-extra')
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const Path = require('path')
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const logger = require('logger-sharelatex')
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const _ = require('lodash')
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const Settings = require('@overleaf/settings')
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const crypto = require('crypto')
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const Metrics = require('./Metrics')
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const OutputFileOptimiser = require('./OutputFileOptimiser')
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const ContentCacheManager = require('./ContentCacheManager')
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const { TimedOutError } = require('./Errors')
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module.exports = OutputCacheManager = {
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CONTENT_SUBDIR: 'content',
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CACHE_SUBDIR: 'generated-files',
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ARCHIVE_SUBDIR: 'archived-logs',
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// build id is HEXDATE-HEXRANDOM from Date.now()and RandomBytes
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// for backwards compatibility, make the randombytes part optional
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BUILD_REGEX: /^[0-9a-f]+(-[0-9a-f]+)?$/,
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CONTENT_REGEX: /^[0-9a-f]+(-[0-9a-f]+)?$/,
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CACHE_LIMIT: 2, // maximum number of cache directories
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CACHE_AGE: 60 * 60 * 1000, // up to one hour old
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path(buildId, file) {
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// used by static server, given build id return '.cache/clsi/buildId'
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if (buildId.match(OutputCacheManager.BUILD_REGEX)) {
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return Path.join(OutputCacheManager.CACHE_SUBDIR, buildId, file)
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} else {
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// for invalid build id, return top level
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return file
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}
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},
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generateBuildId(callback) {
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// generate a secure build id from Date.now() and 8 random bytes in hex
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if (callback == null) {
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callback = function (error, buildId) {}
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}
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return crypto.randomBytes(8, function (err, buf) {
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if (err != null) {
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return callback(err)
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}
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const random = buf.toString('hex')
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const date = Date.now().toString(16)
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return callback(err, `${date}-${random}`)
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})
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},
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saveOutputFiles(
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{ request, stats, timings },
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outputFiles,
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compileDir,
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outputDir,
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callback
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) {
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if (callback == null) {
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callback = function (error) {}
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}
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return OutputCacheManager.generateBuildId(function (err, buildId) {
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if (err != null) {
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return callback(err)
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}
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return OutputCacheManager.saveOutputFilesInBuildDir(
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outputFiles,
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compileDir,
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outputDir,
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buildId,
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function (err, result) {
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if (err != null) {
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return callback(err)
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}
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OutputCacheManager.collectOutputPdfSize(
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result,
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outputDir,
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stats,
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(err, result) => {
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if (err) return callback(err, result)
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if (!Settings.enablePdfCaching || !request.enablePdfCaching) {
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return callback(null, result)
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}
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OutputCacheManager.saveStreamsInContentDir(
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{ stats, timings },
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result,
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compileDir,
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outputDir,
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callback
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)
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}
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)
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}
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)
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})
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},
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saveOutputFilesInBuildDir(
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outputFiles,
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compileDir,
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outputDir,
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buildId,
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callback
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) {
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// make a compileDir/CACHE_SUBDIR/build_id directory and
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// copy all the output files into it
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if (callback == null) {
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callback = function (error) {}
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}
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const cacheRoot = Path.join(outputDir, OutputCacheManager.CACHE_SUBDIR)
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// Put the files into a new cache subdirectory
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const cacheDir = Path.join(
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outputDir,
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OutputCacheManager.CACHE_SUBDIR,
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buildId
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)
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// Is it a per-user compile? check if compile directory is PROJECTID-USERID
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const perUser = Path.basename(compileDir).match(
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/^[0-9a-f]{24}-[0-9a-f]{24}$/
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)
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// Archive logs in background
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if (
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(Settings.clsi != null ? Settings.clsi.archive_logs : undefined) ||
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(Settings.clsi != null ? Settings.clsi.strace : undefined)
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) {
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OutputCacheManager.archiveLogs(
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outputFiles,
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compileDir,
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outputDir,
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buildId,
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function (err) {
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if (err != null) {
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return logger.warn({ err }, 'erroring archiving log files')
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}
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}
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)
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}
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// make the new cache directory
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return fse.ensureDir(cacheDir, function (err) {
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if (err != null) {
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logger.error(
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{ err, directory: cacheDir },
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'error creating cache directory'
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)
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return callback(err, outputFiles)
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} else {
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// copy all the output files into the new cache directory
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const results = []
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return async.mapSeries(
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outputFiles,
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function (file, cb) {
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// don't send dot files as output, express doesn't serve them
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if (OutputCacheManager._fileIsHidden(file.path)) {
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logger.debug(
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{ compileDir, path: file.path },
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'ignoring dotfile in output'
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)
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return cb()
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}
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// copy other files into cache directory if valid
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const newFile = _.clone(file)
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const [src, dst] = Array.from([
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Path.join(compileDir, file.path),
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Path.join(cacheDir, file.path)
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])
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return OutputCacheManager._checkFileIsSafe(src, function (
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err,
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isSafe
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) {
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if (err != null) {
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return cb(err)
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}
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if (!isSafe) {
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return cb()
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}
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return OutputCacheManager._checkIfShouldCopy(src, function (
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err,
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shouldCopy
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) {
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if (err != null) {
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return cb(err)
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}
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if (!shouldCopy) {
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return cb()
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}
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return OutputCacheManager._copyFile(src, dst, function (err) {
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if (err != null) {
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return cb(err)
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}
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newFile.build = buildId // attach a build id if we cached the file
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results.push(newFile)
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return cb()
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})
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})
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})
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},
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function (err) {
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if (err != null) {
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// pass back the original files if we encountered *any* error
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callback(err, outputFiles)
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// clean up the directory we just created
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return fse.remove(cacheDir, function (err) {
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if (err != null) {
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return logger.error(
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{ err, dir: cacheDir },
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'error removing cache dir after failure'
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)
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}
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})
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} else {
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// pass back the list of new files in the cache
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callback(err, results)
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// let file expiry run in the background, expire all previous files if per-user
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return OutputCacheManager.expireOutputFiles(cacheRoot, {
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keep: buildId,
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limit: perUser ? 1 : null
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})
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}
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}
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)
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}
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})
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},
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collectOutputPdfSize(outputFiles, outputDir, stats, callback) {
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const outputFile = outputFiles.find((x) => x.path === 'output.pdf')
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if (!outputFile) return callback(null, outputFiles)
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const outputFilePath = Path.join(
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outputDir,
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OutputCacheManager.path(outputFile.build, outputFile.path)
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)
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fs.stat(outputFilePath, (err, stat) => {
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if (err) return callback(err, outputFiles)
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outputFile.size = stat.size
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stats['pdf-size'] = outputFile.size
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callback(null, outputFiles)
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})
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},
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saveStreamsInContentDir(
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{ stats, timings },
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outputFiles,
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compileDir,
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outputDir,
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callback
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) {
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const cacheRoot = Path.join(outputDir, OutputCacheManager.CONTENT_SUBDIR)
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// check if content dir exists
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OutputCacheManager.ensureContentDir(cacheRoot, function (err, contentDir) {
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if (err) return callback(err, outputFiles)
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const outputFile = outputFiles.find((x) => x.path === 'output.pdf')
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if (outputFile) {
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// possibly we should copy the file from the build dir here
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const outputFilePath = Path.join(
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outputDir,
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OutputCacheManager.path(outputFile.build, outputFile.path)
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)
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const pdfSize = outputFile.size
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const timer = new Metrics.Timer('compute-pdf-ranges')
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ContentCacheManager.update(
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contentDir,
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outputFilePath,
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pdfSize,
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timings.compile,
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function (err, result) {
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if (err && err instanceof TimedOutError) {
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logger.warn(
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{ err, outputDir, stats, timings },
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'pdf caching timed out'
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)
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stats['pdf-caching-timed-out'] = 1
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return callback(null, outputFiles)
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}
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if (err) return callback(err, outputFiles)
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const [contentRanges, newContentRanges, reclaimedSpace] = result
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if (Settings.enablePdfCachingDark) {
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// In dark mode we are doing the computation only and do not emit
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// any ranges to the frontend.
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} else {
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outputFile.contentId = Path.basename(contentDir)
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outputFile.ranges = contentRanges
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}
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timings['compute-pdf-caching'] = timer.done()
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stats['pdf-caching-n-ranges'] = contentRanges.length
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stats['pdf-caching-total-ranges-size'] = contentRanges.reduce(
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(sum, next) => sum + (next.end - next.start),
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0
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)
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stats['pdf-caching-n-new-ranges'] = newContentRanges.length
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stats['pdf-caching-new-ranges-size'] = newContentRanges.reduce(
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(sum, next) => sum + (next.end - next.start),
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0
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)
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stats['pdf-caching-reclaimed-space'] = reclaimedSpace
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callback(null, outputFiles)
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}
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)
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} else {
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callback(null, outputFiles)
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}
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})
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},
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ensureContentDir(contentRoot, callback) {
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fse.ensureDir(contentRoot, function (err) {
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if (err != null) {
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return callback(err)
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}
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fs.readdir(contentRoot, function (err, results) {
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const dirs = results.sort()
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const contentId = dirs.find((dir) =>
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OutputCacheManager.BUILD_REGEX.test(dir)
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)
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if (contentId) {
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callback(null, Path.join(contentRoot, contentId))
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} else {
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// make a content directory
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OutputCacheManager.generateBuildId(function (err, contentId) {
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if (err) {
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return callback(err)
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}
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const contentDir = Path.join(contentRoot, contentId)
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fse.ensureDir(contentDir, function (err) {
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if (err) {
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return callback(err)
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}
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return callback(null, contentDir)
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})
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})
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}
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})
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})
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},
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archiveLogs(outputFiles, compileDir, outputDir, buildId, callback) {
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if (callback == null) {
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callback = function (error) {}
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}
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const archiveDir = Path.join(
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outputDir,
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OutputCacheManager.ARCHIVE_SUBDIR,
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buildId
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)
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logger.log({ dir: archiveDir }, 'archiving log files for project')
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return fse.ensureDir(archiveDir, function (err) {
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if (err != null) {
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return callback(err)
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}
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return async.mapSeries(
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outputFiles,
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function (file, cb) {
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const [src, dst] = Array.from([
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Path.join(compileDir, file.path),
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Path.join(archiveDir, file.path)
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])
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return OutputCacheManager._checkFileIsSafe(src, function (
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err,
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isSafe
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) {
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if (err != null) {
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return cb(err)
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}
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if (!isSafe) {
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return cb()
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}
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return OutputCacheManager._checkIfShouldArchive(src, function (
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err,
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shouldArchive
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) {
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if (err != null) {
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return cb(err)
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}
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if (!shouldArchive) {
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return cb()
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}
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return OutputCacheManager._copyFile(src, dst, cb)
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})
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})
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},
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callback
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)
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})
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},
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expireOutputFiles(cacheRoot, options, callback) {
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// look in compileDir for build dirs and delete if > N or age of mod time > T
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if (callback == null) {
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callback = function (error) {}
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}
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return fs.readdir(cacheRoot, function (err, results) {
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if (err != null) {
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if (err.code === 'ENOENT') {
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return callback(null)
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} // cache directory is empty
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logger.error({ err, project_id: cacheRoot }, 'error clearing cache')
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return callback(err)
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}
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const dirs = results.sort().reverse()
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const currentTime = Date.now()
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const isExpired = function (dir, index) {
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if ((options != null ? options.keep : undefined) === dir) {
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return false
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}
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// remove any directories over the requested (non-null) limit
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if (
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(options != null ? options.limit : undefined) != null &&
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index > options.limit
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) {
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return true
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}
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// remove any directories over the hard limit
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if (index > OutputCacheManager.CACHE_LIMIT) {
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return true
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}
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// we can get the build time from the first part of the directory name DDDD-RRRR
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// DDDD is date and RRRR is random bytes
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const dirTime = parseInt(
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__guard__(dir.split('-'), (x) => x[0]),
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16
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)
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const age = currentTime - dirTime
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return age > OutputCacheManager.CACHE_AGE
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}
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const toRemove = _.filter(dirs, isExpired)
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const removeDir = (dir, cb) =>
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fse.remove(Path.join(cacheRoot, dir), function (err, result) {
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logger.log({ cache: cacheRoot, dir }, 'removed expired cache dir')
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if (err != null) {
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logger.error({ err, dir }, 'cache remove error')
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}
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return cb(err, result)
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})
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return async.eachSeries(
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toRemove,
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(dir, cb) => removeDir(dir, cb),
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callback
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)
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})
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},
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_fileIsHidden(path) {
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return (path != null ? path.match(/^\.|\/\./) : undefined) != null
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},
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_checkFileIsSafe(src, callback) {
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// check if we have a valid file to copy into the cache
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if (callback == null) {
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callback = function (error, isSafe) {}
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}
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return fs.stat(src, function (err, stats) {
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if ((err != null ? err.code : undefined) === 'ENOENT') {
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logger.warn(
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{ err, file: src },
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'file has disappeared before copying to build cache'
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)
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return callback(err, false)
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} else if (err != null) {
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// some other problem reading the file
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logger.error({ err, file: src }, 'stat error for file in cache')
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return callback(err, false)
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} else if (!stats.isFile()) {
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// other filetype - reject it
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logger.warn(
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{ src, stat: stats },
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'nonfile output - refusing to copy to cache'
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)
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return callback(null, false)
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} else {
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// it's a plain file, ok to copy
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return callback(null, true)
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}
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})
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},
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_copyFile(src, dst, callback) {
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// copy output file into the cache
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return fse.copy(src, dst, function (err) {
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if ((err != null ? err.code : undefined) === 'ENOENT') {
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logger.warn(
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{ err, file: src },
|
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'file has disappeared when copying to build cache'
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)
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return callback(err, false)
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} else if (err != null) {
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logger.error({ err, src, dst }, 'copy error for file in cache')
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return callback(err)
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} else {
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if (
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Settings.clsi != null ? Settings.clsi.optimiseInDocker : undefined
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) {
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// don't run any optimisations on the pdf when they are done
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// in the docker container
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return callback()
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} else {
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// call the optimiser for the file too
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return OutputFileOptimiser.optimiseFile(src, dst, callback)
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}
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}
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})
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},
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_checkIfShouldCopy(src, callback) {
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if (callback == null) {
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callback = function (err, shouldCopy) {}
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}
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return callback(null, !Path.basename(src).match(/^strace/))
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},
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_checkIfShouldArchive(src, callback) {
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let needle
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if (callback == null) {
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callback = function (err, shouldCopy) {}
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}
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if (Path.basename(src).match(/^strace/)) {
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return callback(null, true)
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}
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if (
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(Settings.clsi != null ? Settings.clsi.archive_logs : undefined) &&
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((needle = Path.basename(src)),
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['output.log', 'output.blg'].includes(needle))
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) {
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return callback(null, true)
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}
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return callback(null, false)
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}
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}
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function __guard__(value, transform) {
|
|
return typeof value !== 'undefined' && value !== null
|
|
? transform(value)
|
|
: undefined
|
|
}
|