mirror of
https://github.com/overleaf/overleaf.git
synced 2024-11-21 20:47:08 -05:00
958216d578
[clsi] upgrade logger and metrics module GitOrigin-RevId: 85c346b5eed683672a77d86d6a434dc313b7824b
93 lines
2.9 KiB
JavaScript
93 lines
2.9 KiB
JavaScript
/* eslint-disable
|
|
camelcase,
|
|
no-cond-assign,
|
|
no-unused-vars,
|
|
node/no-deprecated-api,
|
|
*/
|
|
// TODO: This file was created by bulk-decaffeinate.
|
|
// Fix any style issues and re-enable lint.
|
|
/*
|
|
* decaffeinate suggestions:
|
|
* DS101: Remove unnecessary use of Array.from
|
|
* DS102: Remove unnecessary code created because of implicit returns
|
|
* DS103: Rewrite code to no longer use __guard__
|
|
* DS207: Consider shorter variations of null checks
|
|
* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
|
|
*/
|
|
let ForbidSymlinks
|
|
const Path = require('path')
|
|
const fs = require('fs')
|
|
const Settings = require('@overleaf/settings')
|
|
const logger = require('@overleaf/logger')
|
|
|
|
module.exports = ForbidSymlinks = function (staticFn, root, options) {
|
|
const expressStatic = staticFn(root, options)
|
|
const basePath = Path.resolve(root)
|
|
return function (req, res, next) {
|
|
let file, project_id, result
|
|
const path = req.url
|
|
// check that the path is of the form /project_id_or_name/path/to/file.log
|
|
if ((result = path.match(/^\/?([a-zA-Z0-9_-]+)\/(.*)/))) {
|
|
project_id = result[1]
|
|
file = result[2]
|
|
} else {
|
|
logger.warn({ path }, 'unrecognized file request')
|
|
return res.sendStatus(404)
|
|
}
|
|
// check that the file does not use a relative path
|
|
for (const dir of Array.from(file.split('/'))) {
|
|
if (dir === '..') {
|
|
logger.warn({ path }, 'attempt to use a relative path')
|
|
return res.sendStatus(404)
|
|
}
|
|
}
|
|
// check that the requested path is normalized
|
|
const requestedFsPath = `${basePath}/${project_id}/${file}`
|
|
if (requestedFsPath !== Path.normalize(requestedFsPath)) {
|
|
logger.error(
|
|
{ path: requestedFsPath },
|
|
'requestedFsPath is not normalized'
|
|
)
|
|
return res.sendStatus(404)
|
|
}
|
|
// check that the requested path is not a symlink
|
|
return fs.realpath(requestedFsPath, function (err, realFsPath) {
|
|
if (err != null) {
|
|
if (err.code === 'ENOENT') {
|
|
return res.sendStatus(404)
|
|
} else {
|
|
logger.error(
|
|
{
|
|
err,
|
|
requestedFsPath,
|
|
realFsPath,
|
|
path: req.params[0],
|
|
project_id: req.params.project_id,
|
|
},
|
|
'error checking file access'
|
|
)
|
|
return res.sendStatus(500)
|
|
}
|
|
} else if (requestedFsPath !== realFsPath) {
|
|
logger.warn(
|
|
{
|
|
requestedFsPath,
|
|
realFsPath,
|
|
path: req.params[0],
|
|
project_id: req.params.project_id,
|
|
},
|
|
'trying to access a different file (symlink), aborting'
|
|
)
|
|
return res.sendStatus(404)
|
|
} else {
|
|
return expressStatic(req, res, next)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
function __guard__(value, transform) {
|
|
return typeof value !== 'undefined' && value !== null
|
|
? transform(value)
|
|
: undefined
|
|
}
|