filesafe/controllers/uploadController.js

1865 lines
59 KiB
JavaScript

const blake3 = require('blake3')
const contentDisposition = require('content-disposition')
const fs = require('fs')
const path = require('path')
const randomstring = require('randomstring')
const searchQuery = require('search-query-parser')
const auth = require('./authController')
const paths = require('./pathsController')
const perms = require('./permissionController')
const utils = require('./utilsController')
const ClientError = require('./utils/ClientError')
const ServerError = require('./utils/ServerError')
const config = require('./../config')
const logger = require('./../logger')
/** Deprecated config options */
if (config.uploads.cacheFileIdentifiers) {
logger.error('Config option "uploads.cacheFileIdentifiers" is DEPRECATED.')
logger.error('There is now only "uploads.queryDatabaseForIdentifierMatch" for a similar behavior.')
}
const self = {
onHold: new Set() // temporarily held random upload identifiers
}
/** Preferences */
const fileIdentifierLengthFallback = 32
const fileIdentifierLengthChangeable = !config.uploads.fileIdentifierLength.force &&
typeof config.uploads.fileIdentifierLength.min === 'number' &&
typeof config.uploads.fileIdentifierLength.max === 'number'
// Regular file uploads
const maxSize = parseInt(config.uploads.maxSize)
const maxSizeBytes = maxSize * 1e6
// URL uploads
const urlMaxSize = parseInt(config.uploads.urlMaxSize)
const urlMaxSizeBytes = urlMaxSize * 1e6
// Max files allowed in a single multiform POST request
const maxFilesPerUpload = 20
// URL uploads timeout for fetch() instances
// Please be aware that uWebSockets.js has a hard-coded timeout of 10s of no activity,
// so letting fetch() run for more than 10s may cause connection to uploaders to drop early,
// thus preventing lolisafe from responding to uploaders about their URL uploads.
const urlFetchTimeout = 10 * 1000 // 10 seconds
const chunkedUploads = config.uploads.chunkSize &&
typeof config.uploads.chunkSize === 'object' &&
config.uploads.chunkSize.default
const chunkedUploadsTimeout = config.uploads.chunkSize.timeout || 1800000
const chunksData = {}
// Hard-coded min chunk size of 1 MB (e.g. 50 MB = max 50 chunks)
const maxChunksCount = maxSize
// Use fs.copyFile() instead of fs.rename() if chunks dir is NOT inside uploads dir
const chunksCopyFile = !paths.chunks.startsWith(paths.uploads)
const extensionsFilter = Array.isArray(config.extensionsFilter) &&
config.extensionsFilter.length
const urlExtensionsFilter = Array.isArray(config.uploads.urlExtensionsFilter) &&
config.uploads.urlExtensionsFilter.length
// Only disable hashing if explicitly disabled in config file
const enableHashing = config.uploads.hash === undefined
? true
: Boolean(config.uploads.hash)
const queryDatabaseForIdentifierMatch = config.uploads.queryDatabaseForIdentifierMatch ||
config.uploads.queryDbForFileCollisions // old config name for identical behavior
const uploadsPerPage = config.dashboard
? Math.max(Math.min(config.dashboard.uploadsPerPage || 0, 100), 1)
: 25
/** Chunks helper class & function **/
class ChunksData {
constructor (uuid) {
this.uuid = uuid
this.root = path.join(paths.chunks, this.uuid)
this.filename = 'tmp'
this.path = path.join(this.root, this.filename)
this.chunks = 0
this.writeStream = null
this.hashStream = null
// Immediately mark this chunked upload as currently processing
this.processing = true
}
onTimeout () {
self.cleanUpChunks(this.uuid)
}
setTimeout (delay) {
this.clearTimeout()
this._timeout = setTimeout(this.onTimeout.bind(this), delay)
}
clearTimeout () {
if (this._timeout) {
clearTimeout(this._timeout)
}
}
}
const initChunks = async uuid => {
if (chunksData[uuid] === undefined) {
chunksData[uuid] = new ChunksData(uuid)
const exist = await paths.access(chunksData[uuid].root)
.catch(err => {
// Re-throw error only if not directory is missing error
if (err.code !== 'ENOENT') throw err
return false
})
if (!exist) {
await paths.mkdir(chunksData[uuid].root)
}
// Init write & hasher streams
chunksData[uuid].writeStream = fs.createWriteStream(chunksData[uuid].path, { flags: 'a' })
chunksData[uuid].hashStream = enableHashing && blake3.createHash()
} else if (chunksData[uuid].processing) {
// Wait for the first spawned init tasks
throw new ClientError('Previous chunk upload is still being processed. Parallel chunked uploads is not supported.')
}
// Reset timeout
chunksData[uuid].setTimeout(chunkedUploadsTimeout)
return chunksData[uuid]
}
/** Helper functions */
self.isExtensionFiltered = extname => {
// If empty extension needs to be filtered
if (!extname && config.filterNoExtension) return true
// If there are extensions that have to be filtered
if (extname && extensionsFilter) {
const match = config.extensionsFilter.includes(extname.toLowerCase())
const whitelist = config.extensionsFilterMode === 'whitelist'
if ((!whitelist && match) || (whitelist && !match)) return true
}
return false
}
self.parseFileIdentifierLength = fileLength => {
if (!config.uploads.fileIdentifierLength) return fileIdentifierLengthFallback
const parsed = parseInt(fileLength)
if (isNaN(parsed) ||
!fileIdentifierLengthChangeable ||
parsed < config.uploads.fileIdentifierLength.min ||
parsed > config.uploads.fileIdentifierLength.max) {
return config.uploads.fileIdentifierLength.default || fileIdentifierLengthFallback
} else {
return parsed
}
}
self.getUniqueUploadIdentifier = async (length, extension = '', res) => {
for (let i = 0; i < utils.idMaxTries; i++) {
const identifier = randomstring.generate(length)
if (queryDatabaseForIdentifierMatch) {
// If must query database for identifiers matches
if (self.onHold.has(identifier)) {
logger.debug(`Identifier ${identifier} is currently held by another upload (${i + 1}/${utils.idMaxTries}).`)
continue
}
// Put token on-hold (wait for it to be inserted to DB)
self.onHold.add(identifier)
const file = await utils.db.table('files')
.whereRaw('?? like ?', ['name', `${identifier}.%`])
.select('id')
.first()
if (file) {
self.onHold.delete(identifier)
logger.debug(`Identifier ${identifier} is already in use (${i + 1}/${utils.idMaxTries}).`)
continue
}
if (utils.devmode) {
logger.debug(`upload.onHold: ${utils.inspect(self.onHold)}`)
}
// Unhold identifier once the Response has been sent
if (res) {
if (!res.locals.identifiers) {
res.locals.identifiers = []
res.once('finish', () => { self.unholdUploadIdentifiers(res) })
}
res.locals.identifiers.push(identifier)
}
} else {
// Otherwise, check for physical files' full name matches
try {
const name = identifier + extension
await paths.access(path.join(paths.uploads, name))
logger.debug(`${name} is already in use (${i + 1}/${utils.idMaxTries}).`)
continue
} catch (error) {
// Re-throw non-ENOENT error
if (error & error.code !== 'ENOENT') throw error
}
}
// Return the random identifier only
return identifier
}
throw new ServerError('Failed to allocate a unique name for the upload. Try again?')
}
self.unholdUploadIdentifiers = res => {
if (!res.locals.identifiers) return
for (const identifier of res.locals.identifiers) {
self.onHold.delete(identifier)
if (utils.devmode) {
logger.debug(`upload.onHold: ${utils.inspect(self.onHold)} -> ${utils.inspect(identifier)}`)
}
}
delete res.locals.identifiers
}
self.assertRetentionPeriod = (user, age) => {
if (!utils.retentions.enabled) {
return null
}
// _ is special key for non-registered users (no auth requests)
const group = user ? perms.group(user) : '_'
if (!group || !utils.retentions.periods[group]) {
throw new ClientError('You are not eligible for any file retention periods.', { statusCode: 403 })
}
let parsed = parseFloat(age)
if (Number.isNaN(parsed) || age < 0) {
parsed = utils.retentions.default[group]
} else if (!utils.retentions.periods[group].includes(parsed)) {
throw new ClientError('You are not eligible for the specified file retention period.', { statusCode: 403 })
}
if (!parsed && !utils.retentions.periods[group].includes(0)) {
throw new ClientError('Permanent uploads are not permitted.', { statusCode: 403 })
}
return parsed
}
self.parseStripTags = stripTags => {
if (!config.uploads.stripTags) return false
if (config.uploads.stripTags.force || stripTags === undefined) {
return config.uploads.stripTags.default
}
return Boolean(parseInt(stripTags))
}
/** File uploads */
self.upload = async (req, res) => {
// Assert Request type (skip for POST /nojs requests)
let isMultipart = req.locals.nojs
let isJson
if (!req.locals.nojs) {
// Multipart for regular uploads, JSON for URL uploads
isMultipart = req.is('multipart/form-data')
isJson = req.is('application/json')
if (!isMultipart && !isJson) {
throw new ClientError('Request Content-Type must be either multipart/form-data or application/json.')
}
}
if (config.privateUploadGroup) {
if (!req.locals.user || !perms.is(req.locals.user, config.privateUploadGroup)) {
throw new ClientError(config.privateUploadCustomResponse || 'Your usergroup is not permitted to upload new files.', { statusCode: 403 })
}
}
let albumid = parseInt(req.headers.albumid || (req.path_parameters && req.path_parameters.albumid))
if (isNaN(albumid)) albumid = null
const age = self.assertRetentionPeriod(req.locals.user, req.headers.age)
if (isMultipart) {
return self.actuallyUpload(req, res, { albumid, age })
} else {
// Parse POST body
req.body = await req.json()
return self.actuallyUploadUrls(req, res, { albumid, age })
}
}
self.actuallyUpload = async (req, res, data = {}) => {
// Init empty Request.body and Request.files
req.body = {}
req.files = []
const unfreezeChunksData = async () => {
req.files.forEach(file => {
if (!file.chunksData) return
file.chunksData.processing = false
})
}
const cleanUpFiles = async () => {
// Unhold identifiers generated via self.getUniqueUploadIdentifier()
self.unholdUploadIdentifiers(res)
// Unlink temp files
return Promise.all(req.files.map(async file => {
if (!file.filename) return
return utils.unlinkFile(file.filename).catch(logger.error)
}))
}
await req.multipart({
// https://github.com/mscdex/busboy/tree/v1.6.0#exports
// This would otherwise defaults to latin1
defParamCharset: 'utf8',
limits: {
fileSize: maxSizeBytes,
// Maximum number of non-file fields.
// Dropzone.js will add 6 extra fields for chunked uploads.
// We don't use them for anything else.
fields: 6,
// Maximum number of file fields.
// Chunked uploads still need to provide ONLY 1 file field.
// Otherwise, only one of the files will end up being properly stored,
// and that will also be as a chunk.
files: maxFilesPerUpload
}
}, async field => {
// Keep non-files fields in Request.body
// Since fields get processed in sequence depending on the order at which they were defined,
// chunked uploads data must be set before the files[] field which contain the actual file
if (field.truncated) {
// Re-map Dropzone chunked uploads keys so people can manually use the API without prepending 'dz'
let name = field.name
if (name.startsWith('dz')) {
name = name.replace(/^dz/, '')
}
req.body[name] = field.value
return
}
// Process files immediately and push into Request.files array
if (field.file) {
if (field.name !== 'files[]') {
throw new ClientError(`Unexpected file-type field: ${field.name}`)
}
// Push immediately as we will only be adding props into the file object down the line
const file = {
albumid: data.albumid,
age: data.age,
originalname: field.file.name || '',
mimetype: field.mime_type || '',
isChunk: req.body.uuid !== undefined &&
req.body.chunkindex !== undefined
}
req.files.push(file)
if (file.isChunk) {
if (!chunkedUploads) {
throw new ClientError('Chunked uploads are disabled at the moment.')
} else if (req.files.length > 1) {
throw new ClientError('Chunked uploads may only be uploaded 1 chunk at a time.')
}
}
file.extname = utils.extname(file.originalname)
if (self.isExtensionFiltered(file.extname)) {
throw new ClientError(`${file.extname ? `${file.extname.substr(1).toUpperCase()} files` : 'Files with no extension'} are not permitted.`)
}
if (file.isChunk) {
// Re-map UUID property to IP-specific UUID
const uuid = `${req.ip}_${req.body.uuid}`
// Calling initChunks() will also reset the chunked uploads' timeout
file.chunksData = await initChunks(uuid)
file.filename = file.chunksData.filename
file.path = file.chunksData.path
} else {
const length = self.parseFileIdentifierLength(req.headers.filelength)
const identifier = await self.getUniqueUploadIdentifier(length, file.extname, res)
file.filename = identifier + file.extname
file.path = path.join(paths.uploads, file.filename)
}
const readStream = field.file.stream
let writeStream
let hashStream
let _reject
// Write the file into disk, and supply required props into file object
await new Promise((resolve, reject) => {
// Keep reference to Promise's reject function to allow unlistening events
_reject = reject
// Ensure this Promise's status can be asserted later
const _resolve = () => {
file.promised = true
return resolve()
}
readStream.once('error', _reject)
if (file.isChunk) {
writeStream = file.chunksData.writeStream
hashStream = file.chunksData.hashStream
} else {
writeStream = fs.createWriteStream(file.path)
hashStream = enableHashing && blake3.createHash()
}
// Re-init stream errors listeners for this Request
writeStream.once('error', _reject)
if (hashStream) {
hashStream.once('error', _reject)
// Ensure readStream will only be resumed later down the line by readStream.pipe()
readStream.pause()
readStream.on('data', data => {
// .dispose() will destroy this internal component,
// so use it as an indicator of whether the hashStream has been .dispose()'d
if (hashStream.hash.hash) {
hashStream.update(data)
}
})
}
if (file.isChunk) {
// We listen for readStream's end event
readStream.once('end', () => _resolve())
} else {
// We immediately listen for writeStream's finish event
writeStream.once('finish', () => {
file.size = writeStream.bytesWritten
if (hashStream && hashStream.hash.hash) {
const hash = hashStream.digest('hex')
file.hash = file.size === 0
? ''
: hash
}
return _resolve()
})
}
// Pipe readStream to writeStream
// Do not end writeStream when readStream finishes if it's a chunk upload
readStream
.pipe(writeStream, { end: !file.isChunk })
}).catch(error => {
// Dispose of unfinished write & hasher streams
if (writeStream && !writeStream.destroyed) {
writeStream.destroy()
}
if (hashStream && hashStream.hash.hash) {
hashStream.dispose()
}
// Re-throw error
throw error
}).finally(() => {
if (!file.isChunk) return
// Unlisten streams' error event for this Request if it's a chunk upload
utils.unlistenEmitters([writeStream, hashStream], 'error', _reject)
})
// file.size is not populated if a chunk upload, so ignore
if (config.filterEmptyFile && !file.isChunk && file.size === 0) {
throw new ClientError('Empty files are not allowed.')
}
}
}).catch(error => {
// Clean up temp files and held identifiers (do not wait)
cleanUpFiles()
unfreezeChunksData()
// Response.multipart() itself may throw string errors
if (typeof error === 'string') {
throw new ClientError(error)
} else {
throw error
}
})
if (!req.files.length) {
throw new ClientError('No files.')
}
// If for some reason Request.multipart() resolves before a file's Promise
// Typically caused by something hanging up longer than
// uWebSockets.js' internal security timeout (10 seconds)
if (req.files.some(file => file.promised !== true)) {
// Clean up temp files and held identifiers (do not wait)
cleanUpFiles()
unfreezeChunksData()
throw new ServerError()
}
// If chunked uploads is enabled and the uploaded file is a chunk, then just say that it was a success
// NOTE: We loop through Request.files for clarity,
// but we will actually have already rejected the Request
// if it has more than 1 file while being a chunk upload
if (req.files.some(file => file.chunksData)) {
req.files.forEach(file => {
file.chunksData.chunks++
// Mark as ready to accept more chunk uploads or to finalize
file.chunksData.processing = false
})
return res.json({ success: true })
}
// If POST /nojs requests, additionally attempt to parse token from form input
if (req.locals.nojs) {
await new Promise((resolve, reject) => {
auth.optionalUser(req, res, error => {
if (error) return reject(error)
return resolve()
}, {
token: req.body.token
})
})
}
const filesData = req.files
if (utils.scan.instance) {
const scanResult = await self.scanFiles(req, filesData)
if (scanResult) {
throw new ClientError(scanResult)
}
}
await self.stripTags(req, filesData)
const result = await self.storeFilesToDb(req, res, filesData)
return self.sendUploadResponse(req, res, result)
}
/** URL uploads */
self.actuallyUploadUrls = async (req, res, data = {}) => {
if (!config.uploads.urlMaxSize) {
throw new ClientError('Upload by URLs is disabled at the moment.', { statusCode: 403 })
}
const urls = req.body.urls
if (!urls || !(urls instanceof Array)) {
throw new ClientError('Missing "urls" property (array).')
}
if (urls.length > maxFilesPerUpload) {
throw new ClientError(`Maximum ${maxFilesPerUpload} URLs at a time.`)
}
const assertSize = (size, isContentLength = false) => {
if (config.filterEmptyFile && size === 0) {
throw new ClientError('Empty files are not allowed.')
} else if (size > urlMaxSizeBytes) {
if (isContentLength) {
throw new ClientError(`File too large. Content-Length header reports file is bigger than ${urlMaxSize} MB.`)
} else {
throw new ClientError(`File too large. File is bigger than ${urlMaxSize} MB.`)
}
}
}
const filesData = []
await Promise.all(urls.map(async url => {
// Push immediately as we will only be adding props into the file object down the line
const file = {
url,
albumid: data.albumid,
age: data.age
}
filesData.push(file)
if (config.uploads.urlProxy) {
url = config.uploads.urlProxy
.replace(/{url}/g, encodeURIComponent(url))
.replace(/{url-noprot}/g, encodeURIComponent(url.replace(/^https?:\/\//, '')))
}
// Try to determine size early via Content-Length header,
// but continue anyway if it isn't a valid number (some servers don't provide them)
const headStart = Date.now()
try {
const head = await utils.fetch(url, {
method: 'HEAD',
size: urlMaxSizeBytes, // limit max response body size
timeout: urlFetchTimeout
})
if (head.status === 200) {
const contentLength = parseInt(head.headers.get('content-length'))
if (!Number.isNaN(contentLength)) {
assertSize(contentLength, true)
}
}
} catch (ex) {
// Re-throw only if ClientError, otherwise ignore
if (ex instanceof ClientError) {
throw ex
}
}
const length = self.parseFileIdentifierLength(req.headers.filelength)
const identifier = await self.getUniqueUploadIdentifier(length, '.tmp', res)
// Temporarily store to disk as a .tmp file
file.filename = identifier + '.tmp'
file.path = path.join(paths.uploads, file.filename)
let writeStream
let hashStream
return Promise.resolve().then(async () => {
writeStream = fs.createWriteStream(file.path)
hashStream = enableHashing && blake3.createHash()
// Reduce GET timeout by time already spent for HEAD request
const _timeout = urlFetchTimeout - (Date.now() - headStart)
// Skip early if HEAD fetch took too long
if (_timeout <= 0) {
throw new ClientError('Fetch timed out. Try again?')
}
const fetchFile = await utils.fetch(url, {
method: 'GET',
size: urlMaxSizeBytes, // limit max response body size
timeout: _timeout
})
.then(res => new Promise((resolve, reject) => {
if (res.status !== 200) {
return resolve(res)
}
writeStream.once('error', reject)
res.body.once('error', reject)
if (hashStream) {
hashStream.once('error', reject)
res.body.on('data', d => hashStream.update(d))
}
res.body.pipe(writeStream)
writeStream.once('finish', () => resolve(res))
}))
if (fetchFile.status !== 200) {
throw new ServerError(`${fetchFile.status} ${fetchFile.statusText}`)
}
// Re-test size via actual bytes written to physical file
assertSize(writeStream.bytesWritten)
// Try to determine filename from Content-Disposition header if available
const contentDispositionHeader = fetchFile.headers.get('content-disposition')
if (contentDispositionHeader) {
const parsed = contentDisposition.parse(contentDispositionHeader)
if (parsed && parsed.parameters) {
file.originalname = parsed.parameters.filename
}
}
if (!file.originalname) {
file.originalname = path.basename(url).split(/[?#]/)[0]
}
file.extname = utils.extname(file.originalname)
// Extensions filter
let filtered = false
if (urlExtensionsFilter && ['blacklist', 'whitelist'].includes(config.uploads.urlExtensionsFilterMode)) {
const match = config.uploads.urlExtensionsFilter.includes(file.extname.toLowerCase())
const whitelist = config.uploads.urlExtensionsFilterMode === 'whitelist'
filtered = ((!whitelist && match) || (whitelist && !match))
} else {
filtered = self.isExtensionFiltered(file.extname)
}
if (filtered) {
throw new ClientError(`${file.extname ? `${file.extname.substr(1).toUpperCase()} files` : 'Files with no extension'} are not permitted.`)
}
// Generate a new filename with actual extname
// Also generate a new random identifier if required
const _identifier = queryDatabaseForIdentifierMatch
? identifier
: await self.getUniqueUploadIdentifier(length, file.extname, res)
const _name = _identifier + file.extname
// Move .tmp file to the new filename
const destination = path.join(paths.uploads, _name)
await paths.rename(file.path, destination)
// Then update the props with renewed information
file.filename = _name
file.path = destination
// Finalize other file props
const contentType = fetchFile.headers.get('content-type')
file.mimetype = contentType ? contentType.split(';')[0] : 'application/octet-stream'
file.size = writeStream.bytesWritten
file.hash = hashStream
? hashStream.digest('hex')
: null
}).catch(err => {
// Dispose of unfinished write & hasher streams
if (writeStream && !writeStream.destroyed) {
writeStream.destroy()
}
if (hashStream && hashStream.hash.hash) {
hashStream.dispose()
}
// Re-throw errors
throw err
})
})).catch(async error => {
// Unlink temp files (do not wait)
if (filesData.length) {
Promise.all(filesData.map(async file => {
if (!file.filename) return
return utils.unlinkFile(file.filename).catch(logger.error)
}))
}
// Re-throw suppressed errors as ClientError, otherwise as-is
const errorString = error.toString()
const suppress = [
/ network timeout at:/,
/ over limit:/
]
if (suppress.some(t => t.test(errorString))) {
throw new ClientError(errorString)
} else if (errorString.startsWith('AbortError:')) {
throw new ClientError('Fetch timed out. Try again?')
} else {
throw error
}
})
if (utils.scan.instance) {
const scanResult = await self.scanFiles(req, filesData)
if (scanResult) {
throw new ClientError(scanResult)
}
}
const result = await self.storeFilesToDb(req, res, filesData)
return self.sendUploadResponse(req, res, result)
}
/** Chunk uploads */
self.finishChunks = async (req, res) => {
if (!chunkedUploads) {
throw new ClientError('Chunked upload is disabled.', { statusCode: 403 })
}
const files = req.body.files
if (!Array.isArray(files) || !files.length) {
throw new ClientError('Bad request.')
}
// Re-map UUID property to IP-specific UUID
files.forEach(file => {
file.uuid = `${req.ip}_${file.uuid}`
})
return self.actuallyFinishChunks(req, res, files)
.catch(error => {
// Unlink temp files (do not wait)
Promise.all(files.map(async file => {
if (file.uuid && chunksData[file.uuid]) {
return self.cleanUpChunks(file.uuid).catch(logger.error)
}
}))
// Re-throw errors
throw error
})
}
self.actuallyFinishChunks = async (req, res, files) => {
const filesData = []
await Promise.all(files.map(async file => {
if (!file.uuid || typeof chunksData[file.uuid] === 'undefined') {
throw new ClientError('Invalid file UUID, or chunks data had already timed out. Try again?')
}
if (chunksData[file.uuid].processing) {
throw new ClientError('Previous chunk upload is still being processed. Try again?')
}
// Suspend timeout
// If the chunk errors out there, it will be immediately cleaned up anyway
chunksData[file.uuid].clearTimeout()
// Conclude write and hasher streams
chunksData[file.uuid].writeStream.end()
const bytesWritten = chunksData[file.uuid].writeStream.bytesWritten
const hash = chunksData[file.uuid].hashStream
? chunksData[file.uuid].hashStream.digest('hex')
: null
if (chunksData[file.uuid].chunks < 2 || chunksData[file.uuid].chunks > maxChunksCount) {
throw new ClientError('Invalid chunks count.')
}
const extname = typeof file.original === 'string' ? utils.extname(file.original) : ''
if (self.isExtensionFiltered(extname)) {
throw new ClientError(`${extname ? `${extname.substr(1).toUpperCase()} files` : 'Files with no extension'} are not permitted.`)
}
const age = self.assertRetentionPeriod(req.locals.user, file.age)
let size = file.size
if (size === undefined) {
size = bytesWritten
} else if (size !== bytesWritten) {
// If client reports actual total size, confirm match
throw new ClientError(`Written bytes (${bytesWritten}) does not match actual size reported by client (${size}).`)
}
if (config.filterEmptyFile && size === 0) {
throw new ClientError('Empty files are not allowed.')
} else if (size > maxSizeBytes) {
throw new ClientError(`File too large. Chunks are bigger than ${maxSize} MB.`)
}
const tmpfile = path.join(chunksData[file.uuid].root, chunksData[file.uuid].filename)
// Double-check file size
const lstat = await paths.lstat(tmpfile)
if (lstat.size !== size) {
throw new ClientError(`Resulting physical file size (${lstat.size}) does not match expected size (${size}).`)
}
// Generate name
const length = self.parseFileIdentifierLength(file.filelength)
const identifier = await self.getUniqueUploadIdentifier(length, extname, res)
const name = identifier + extname
// Move tmp file to final destination
// For fs.copyFile(), tmpfile will eventually be unlinked by self.cleanUpChunks()
const destination = path.join(paths.uploads, name)
if (chunksCopyFile) {
await paths.copyFile(tmpfile, destination)
} else {
await paths.rename(tmpfile, destination)
}
// Continue even when encountering errors
await self.cleanUpChunks(file.uuid).catch(logger.error)
let albumid = parseInt(file.albumid)
if (isNaN(albumid)) {
albumid = null
}
filesData.push({
filename: name,
originalname: file.original || '',
extname,
mimetype: file.type || '',
path: destination,
size,
hash,
albumid,
age
})
}))
if (utils.scan.instance) {
const scanResult = await self.scanFiles(req, filesData)
if (scanResult) {
throw new ClientError(scanResult)
}
}
await self.stripTags(req, filesData)
const result = await self.storeFilesToDb(req, res, filesData)
return self.sendUploadResponse(req, res, result)
}
self.cleanUpChunks = async uuid => {
// Dispose of unfinished write & hasher streams
if (chunksData[uuid].writeStream && !chunksData[uuid].writeStream.destroyed) {
chunksData[uuid].writeStream.destroy()
}
if (chunksData[uuid].hashStream && chunksData[uuid].hashStream.hash.hash) {
chunksData[uuid].hashStream.dispose()
}
// Remove tmp file
await paths.unlink(path.join(chunksData[uuid].root, chunksData[uuid].filename))
.catch(error => {
// Re-throw non-ENOENT error
if (error.code !== 'ENOENT') logger.error(error)
})
// Remove UUID dir
await paths.rmdir(chunksData[uuid].root)
// Delete cached chunks data
delete chunksData[uuid]
}
/** Virus scanning (ClamAV) */
self.assertScanUserBypass = (user, filenames) => {
if (!user || !utils.scan.groupBypass) {
return false
}
if (!Array.isArray(filenames)) {
filenames = [filenames]
}
logger.debug(`[ClamAV]: ${filenames.join(', ')}: Skipped, uploaded by ${user.username} (${utils.scan.groupBypass})`)
return perms.is(user, utils.scan.groupBypass)
}
self.assertScanFileBypass = data => {
if (typeof data !== 'object' || !data.filename) {
return false
}
const extname = data.extname || utils.extname(data.filename)
if (utils.scan.whitelistExtensions && utils.scan.whitelistExtensions.includes(extname)) {
logger.debug(`[ClamAV]: ${data.filename}: Skipped, extension whitelisted`)
return true
}
if (utils.scan.maxSize && data.size !== undefined && data.size > utils.scan.maxSize) {
logger.debug(`[ClamAV]: ${data.filename}: Skipped, size ${data.size} > ${utils.scan.maxSize}`)
return true
}
return false
}
self.scanFiles = async (req, filesData) => {
const filenames = filesData.map(file => file.filename)
if (self.assertScanUserBypass(req.locals.user, filenames)) {
return false
}
const foundThreats = []
const unableToScan = []
const result = await Promise.all(filesData.map(async file => {
if (self.assertScanFileBypass(file)) return
logger.debug(`[ClamAV]: ${file.filename}: Scanning\u2026`)
const response = await utils.scan.instance.isInfected(file.path)
if (response.isInfected) {
logger.log(`[ClamAV]: ${file.filename}: ${response.viruses.join(', ')}`)
foundThreats.push(...response.viruses)
} else if (response.isInfected === null) {
logger.log(`[ClamAV]: ${file.filename}: Unable to scan`)
unableToScan.push(file.filename)
} else {
logger.debug(`[ClamAV]: ${file.filename}: File is clean`)
}
})).then(() => {
if (foundThreats.length) {
const more = foundThreats.length > 1
return `Threat${more ? 's' : ''} detected: ${foundThreats[0]}${more ? ', and more' : ''}.`
} else if (unableToScan.length) {
const more = unableToScan.length > 1
return `Unable to scan: ${unableToScan[0]}${more ? ', and more' : ''}.`
}
}).catch(error => {
logger.error(`[ClamAV]: ${filenames.join(', ')}: ${error.toString()}`)
return 'An unexpected error occurred with ClamAV, please contact the site owner.'
})
if (result) {
// Unlink temp files (do not wait)
Promise.all(filesData.map(async file =>
utils.unlinkFile(file.filename).catch(logger.error)
))
}
return result
}
/** Strip tags (EXIF, etc.) */
self.stripTags = async (req, filesData) => {
if (!self.parseStripTags(req.headers.striptags)) return
try {
await Promise.all(filesData.map(async file =>
utils.stripTags(file.filename, file.extname)
))
} catch (error) {
// Unlink temp files (do not wait)
Promise.all(filesData.map(async file =>
utils.unlinkFile(file.filename).catch(logger.error)
))
// Re-throw error
throw error
}
}
/** Database functions */
self.storeFilesToDb = async (req, res, filesData) => {
const files = []
const exists = []
const albumids = []
await Promise.all(filesData.map(async file => {
if (enableHashing) {
// Check if the file exists by checking its hash and size
const dbFile = await utils.db.table('files')
.where(function () {
if (req.locals.user) {
this.where('userid', req.locals.user.id)
} else {
this.whereNull('userid')
}
})
.where({
hash: file.hash,
size: String(file.size)
})
// Select expirydate to display expiration date of existing files as well
.select('name', 'expirydate')
.first()
if (dbFile) {
// Continue even when encountering errors
await utils.unlinkFile(file.filename).catch(logger.error)
logger.debug(`Unlinked ${file.filename} since a duplicate named ${dbFile.name} exists`)
// If on /nojs route, append original name reported by client,
// instead of the actual original name from database
if (req.path === '/nojs') {
dbFile.original = file.originalname
}
exists.push(dbFile)
return
}
}
const timestamp = Math.floor(Date.now() / 1000)
const data = {
name: file.filename,
original: file.originalname,
type: file.mimetype,
size: String(file.size),
hash: file.hash,
// Only disable if explicitly set to false in config
ip: config.uploads.storeIP !== false ? req.ip : null,
timestamp
}
if (req.locals.user) {
data.userid = req.locals.user.id
data.albumid = file.albumid
if (data.albumid !== null && !albumids.includes(data.albumid)) {
albumids.push(data.albumid)
}
}
if (file.age) {
data.expirydate = data.timestamp + (file.age * 3600) // Hours to seconds
}
files.push(data)
// Generate thumbs, but do not wait
if (utils.mayGenerateThumb(file.extname)) {
utils.generateThumbs(file.filename, file.extname, true).catch(logger.error)
}
}))
if (files.length) {
// albumids should be empty if non-registerd users (no auth requests)
let authorizedIds = []
if (albumids.length) {
authorizedIds = await utils.db.table('albums')
.where({ userid: req.locals.user.id })
.whereIn('id', albumids)
.select('id')
.then(rows => rows.map(row => row.id))
// Remove albumid if user do not own the album
for (const file of files) {
if (file.albumid !== null && !authorizedIds.includes(file.albumid)) {
file.albumid = null
}
}
}
await utils.db.transaction(async trx => {
// Insert new files to DB
await trx('files')
.insert(files)
utils.invalidateStatsCache('uploads')
// Update albums' timestamp
if (authorizedIds.length) {
await trx('albums')
.whereIn('id', authorizedIds)
.update('editedAt', Math.floor(Date.now() / 1000))
utils.deleteStoredAlbumRenders(authorizedIds)
}
})
}
return [...files, ...exists]
}
/** Final response */
self.sendUploadResponse = async (req, res, result) => {
// Send response
return res.json({
success: true,
files: result.map(file => {
const map = {
name: file.name,
url: `${utils.conf.domain ? `${utils.conf.domain}/` : ''}${file.name}`
}
// If a temporary upload, add expiry date
if (file.expirydate) {
map.expirydate = file.expirydate
}
// If on /nojs route, add original name
if (req.path === '/nojs') {
map.original = file.original
}
// If uploaded by user, add delete URL (intended for ShareX and its derivatives)
// Homepage uploader will not use this (use dashboard instead)
if (req.locals.user) {
map.deleteUrl = `${utils.conf.homeDomain || ''}/file/${file.name}?delete`
}
return map
})
})
}
/** Delete uploads */
self.delete = async (req, res) => {
// Re-map Request.body for .bulkDelete()
// This is the legacy API used by lolisafe v3's frontend
// Meanwhile this fork's frontend uses .bulkDelete() straight away
const id = parseInt(req.body.id)
req.body = {
_legacy: true,
field: 'id',
values: isNaN(id) ? undefined : [id]
}
return self.bulkDelete(req, res)
}
self.bulkDelete = async (req, res) => {
const field = req.body.field || 'id'
const values = req.body.values
if (!Array.isArray(values) || !values.length) {
throw new ClientError('No array of files specified.')
}
const failed = await utils.bulkDeleteFromDb(field, values, req.locals.user)
return res.json({ success: true, failed })
}
/** List uploads */
self.list = async (req, res) => {
const all = req.headers.all === '1'
const filters = req.headers.filters
const minoffset = Number(req.headers.minoffset) || 0
const ismoderator = perms.is(req.locals.user, 'moderator')
if (all && !ismoderator) {
return res.status(403).end()
}
const albumid = req.path_parameters && Number(req.path_parameters.albumid)
const basedomain = utils.conf.domain
// Thresholds for regular users (usergroups lower than moderator)
const MAX_WILDCARDS_IN_KEY = 2
const MAX_TEXT_QUERIES = 3 // non-keyed keywords
const MAX_SORT_KEYS = 2
const MAX_IS_KEYS = 1
const filterObj = {
uploaders: [],
excludeUploaders: [],
queries: {
exclude: {}
},
typeIs: [
'image',
'video',
'audio'
],
flags: {}
}
const sortObj = {
// Cast columns to specific type if they are stored differently
casts: {
size: 'integer'
},
// Columns mapping
maps: {
date: 'timestamp',
expiry: 'expirydate',
originalname: 'original'
},
// Columns with which to use SQLite's NULLS LAST option
nullsLast: [
'userid',
'albumid',
'expirydate',
'ip'
],
parsed: []
}
// Parse glob wildcards into SQL wildcards
function sqlLikeParser (pattern) {
// Escape SQL operators
const escaped = pattern
.replace(/(?<!\\)%/g, '\\%')
.replace(/(?<!\\)_/g, '\\_')
// Look for any glob operators
const match = pattern.match(/(?<!\\)(\*|\?)/g)
if (match && match.length) {
return {
count: match.length,
// Replace glob operators with their SQL equivalents
escaped: escaped
.replace(/(?<!\\)\*/g, '%')
.replace(/(?<!\\)\?/g, '_')
}
} else {
return {
count: 0,
// Assume partial match
escaped: `%${escaped}%`
}
}
}
if (filters) {
const keywords = []
// Only allow filtering by 'albumid' when not listing a specific album's uploads
if (isNaN(albumid)) {
keywords.push('albumid')
}
// Only allow filtering by 'ip' and 'user' keys when listing all uploads
if (all) {
keywords.push('ip', 'user')
}
const ranges = [
'date',
'expiry'
]
keywords.push('is', 'sort', 'orderby')
filterObj.queries = searchQuery.parse(filters, {
keywords,
ranges,
tokenize: true,
alwaysArray: true,
offsets: false
})
// Accept orderby as alternative for sort
if (filterObj.queries.orderby) {
if (!filterObj.queries.sort) filterObj.queries.sort = []
filterObj.queries.sort.push(...filterObj.queries.orderby)
delete filterObj.queries.orderby
}
// For some reason, single value won't be in Array even with 'alwaysArray' option
if (typeof filterObj.queries.exclude.text === 'string') {
filterObj.queries.exclude.text = [filterObj.queries.exclude.text]
}
// Text (non-keyed keywords) queries
let textQueries = 0
if (filterObj.queries.text) textQueries += filterObj.queries.text.length
if (filterObj.queries.exclude.text) textQueries += filterObj.queries.exclude.text.length
// Regular user threshold check
if (!ismoderator && textQueries > MAX_TEXT_QUERIES) {
throw new ClientError(`Users are only allowed to use ${MAX_TEXT_QUERIES} non-keyed keyword${MAX_TEXT_QUERIES === 1 ? '' : 's'} at a time.`)
}
if (filterObj.queries.text) {
for (let i = 0; i < filterObj.queries.text.length; i++) {
const result = sqlLikeParser(filterObj.queries.text[i])
if (!ismoderator && result.count > MAX_WILDCARDS_IN_KEY) {
throw new ClientError(`Users are only allowed to use ${MAX_WILDCARDS_IN_KEY} wildcard${MAX_WILDCARDS_IN_KEY === 1 ? '' : 's'} per key.`)
}
filterObj.queries.text[i] = result.escaped
}
}
if (filterObj.queries.exclude.text) {
for (let i = 0; i < filterObj.queries.exclude.text.length; i++) {
const result = sqlLikeParser(filterObj.queries.exclude.text[i])
if (!ismoderator && result.count > MAX_WILDCARDS_IN_KEY) {
throw new ClientError(`Users are only allowed to use ${MAX_WILDCARDS_IN_KEY} wildcard${MAX_WILDCARDS_IN_KEY === 1 ? '' : 's'} per key.`)
}
filterObj.queries.exclude.text[i] = result.escaped
}
}
for (const key of keywords) {
let queryIndex = -1
let excludeIndex = -1
// Make sure keyword arrays only contain unique values
if (filterObj.queries[key]) {
filterObj.queries[key] = filterObj.queries[key].filter((v, i, a) => a.indexOf(v) === i)
queryIndex = filterObj.queries[key].indexOf('-')
}
if (filterObj.queries.exclude[key]) {
filterObj.queries.exclude[key] = filterObj.queries.exclude[key].filter((v, i, a) => a.indexOf(v) === i)
excludeIndex = filterObj.queries.exclude[key].indexOf('-')
}
// Flag to match NULL values
const inQuery = queryIndex !== -1
const inExclude = excludeIndex !== -1
if (inQuery || inExclude) {
// Prioritize exclude keys when both types found
filterObj.flags[`${key}Null`] = inExclude ? false : inQuery
if (inQuery) {
if (filterObj.queries[key].length === 1) {
// Delete key to avoid unexpected behavior
delete filterObj.queries[key]
} else {
filterObj.queries[key].splice(queryIndex, 1)
}
}
if (inExclude) {
if (filterObj.queries.exclude[key].length === 1) {
// Delete key to avoid unexpected behavior
delete filterObj.queries.exclude[key]
} else {
filterObj.queries.exclude[key].splice(excludeIndex, 1)
}
}
}
}
const parseDate = (date, minoffset, resetMs) => {
// [YYYY][/MM][/DD] [HH][:MM][:SS]
// e.g. 2020/01/01 00:00:00, 2018/01/01 06, 2019/11, 12:34:00
const match = date.match(/^(\d{4})?(\/\d{2})?(\/\d{2})?\s?(\d{2})?(:\d{2})?(:\d{2})?$/)
if (match) {
let offset = 0
if (minoffset !== undefined) {
offset = 60000 * (utils.timezoneOffset - minoffset)
}
const dateObj = new Date(Date.now() + offset)
if (match[1] !== undefined) {
dateObj.setFullYear(Number(match[1]), // full year
match[2] !== undefined ? (Number(match[2].slice(1)) - 1) : 0, // month, zero-based
match[3] !== undefined ? Number(match[3].slice(1)) : 1) // date
}
if (match[4] !== undefined) {
dateObj.setHours(Number(match[4]), // hours
match[5] !== undefined ? Number(match[5].slice(1)) : 0, // minutes
match[6] !== undefined ? Number(match[6].slice(1)) : 0) // seconds
}
if (resetMs) {
dateObj.setMilliseconds(0)
}
// Calculate timezone differences
return new Date(dateObj.getTime() - offset)
} else {
return null
}
}
// Parse dates to timestamps
for (const range of ranges) {
if (filterObj.queries[range]) {
if (filterObj.queries[range].from) {
const parsed = parseDate(filterObj.queries[range].from, minoffset, true)
filterObj.queries[range].from = parsed ? Math.floor(parsed / 1000) : null
}
if (filterObj.queries[range].to) {
const parsed = parseDate(filterObj.queries[range].to, minoffset, true)
filterObj.queries[range].to = parsed ? Math.ceil(parsed / 1000) : null
}
}
}
// Query users table for user IDs
if (filterObj.queries.user || filterObj.queries.exclude.user) {
const usernames = []
if (filterObj.queries.user) {
usernames.push(...filterObj.queries.user)
}
if (filterObj.queries.exclude.user) {
usernames.push(...filterObj.queries.exclude.user)
}
const uploaders = await utils.db.table('users')
.whereIn('username', usernames)
.select('id', 'username')
// If no matches, or mismatched results
if (!uploaders || (uploaders.length !== usernames.length)) {
const notFound = usernames.filter(username => {
return !uploaders.find(uploader => uploader.username === username)
})
if (notFound) {
throw new ClientError(`User${notFound.length === 1 ? '' : 's'} not found: ${notFound.join(', ')}.`)
}
}
for (const uploader of uploaders) {
if (filterObj.queries.user && filterObj.queries.user.includes(uploader.username)) {
filterObj.uploaders.push(uploader)
} else {
filterObj.excludeUploaders.push(uploader)
}
}
// Delete keys to avoid unexpected behavior
delete filterObj.queries.user
delete filterObj.queries.exclude.user
}
// Parse sort keys
if (filterObj.queries.sort) {
const allowed = [
'expirydate',
'id',
'name',
'original',
'size',
'timestamp'
]
// Only allow sorting by 'albumid' when not listing a specific album's uploads
if (isNaN(albumid)) {
allowed.push('albumid')
}
// Only allow sorting by 'ip' and 'userid' columns when listing all uploads
if (all) {
allowed.push('ip', 'userid')
}
for (const obQuery of filterObj.queries.sort) {
const tmp = obQuery.toLowerCase().split(':')
const column = sortObj.maps[tmp[0]] || tmp[0]
if (!allowed.includes(column)) {
// Alert users if using disallowed/missing columns
throw new ClientError(`Column "${column}" cannot be used for sorting.\n\nTry the following instead:\n${allowed.join(', ')}`)
}
sortObj.parsed.push({
column,
order: (tmp[1] && /^d/.test(tmp[1])) ? 'desc' : 'asc',
clause: sortObj.nullsLast.includes(column) ? 'nulls last' : '',
cast: sortObj.casts[column] || null
})
}
// Regular user threshold check
if (!ismoderator && sortObj.parsed.length > MAX_SORT_KEYS) {
throw new ClientError(`Users are only allowed to use ${MAX_SORT_KEYS} sort key${MAX_SORT_KEYS === 1 ? '' : 's'} at a time.`)
}
// Delete key to avoid unexpected behavior
delete filterObj.queries.sort
}
// Parse is keys
let isKeys = 0
let isLast
if (filterObj.queries.is || filterObj.queries.exclude.is) {
for (const type of filterObj.typeIs) {
const inQuery = filterObj.queries.is && filterObj.queries.is.includes(type)
const inExclude = filterObj.queries.exclude.is && filterObj.queries.exclude.is.includes(type)
// Prioritize exclude keys when both types found
if (inQuery || inExclude) {
filterObj.flags[`is${type}`] = inExclude ? false : inQuery
if (isLast !== undefined && isLast !== filterObj.flags[`is${type}`]) {
throw new ClientError('Cannot mix inclusion and exclusion type-is keys.')
}
isKeys++
isLast = filterObj.flags[`is${type}`]
}
}
// Delete keys to avoid unexpected behavior
delete filterObj.queries.is
delete filterObj.queries.exclude.is
}
// Regular user threshold check
if (!ismoderator && isKeys > MAX_IS_KEYS) {
throw new ClientError(`Users are only allowed to use ${MAX_IS_KEYS} type-is key${MAX_IS_KEYS === 1 ? '' : 's'} at a time.`)
}
}
function filter () {
// If listing all uploads
if (all) {
this.where(function () {
// Filter uploads matching any of the supplied 'user' keys and/or NULL flag
// Prioritze exclude keys when both types found
this.orWhere(function () {
if (filterObj.excludeUploaders.length) {
this.whereNotIn('userid', filterObj.excludeUploaders.map(v => v.id))
} else if (filterObj.uploaders.length) {
this.orWhereIn('userid', filterObj.uploaders.map(v => v.id))
}
// Such overbearing logic for NULL values, smh...
if ((filterObj.excludeUploaders.length && filterObj.flags.userNull !== false) ||
(filterObj.uploaders.length && filterObj.flags.userNull) ||
(!filterObj.excludeUploaders.length && !filterObj.uploaders.length && filterObj.flags.userNull)) {
this.orWhereNull('userid')
} else if (filterObj.flags.userNull === false) {
this.whereNotNull('userid')
}
})
// Filter uploads matching any of the supplied 'ip' keys and/or NULL flag
// Same prioritization logic as above
this.orWhere(function () {
if (filterObj.queries.exclude.ip) {
this.whereNotIn('ip', filterObj.queries.exclude.ip)
} else if (filterObj.queries.ip) {
this.orWhereIn('ip', filterObj.queries.ip)
}
// ...
if ((filterObj.queries.exclude.ip && filterObj.flags.ipNull !== false) ||
(filterObj.queries.ip && filterObj.flags.ipNull) ||
(!filterObj.queries.exclude.ip && !filterObj.queries.ip && filterObj.flags.ipNull)) {
this.orWhereNull('ip')
} else if (filterObj.flags.ipNull === false) {
this.whereNotNull('ip')
}
})
})
} else {
// If not listing all uploads, list user's uploads
this.where('userid', req.locals.user.id)
}
// Then, refine using any of the supplied 'albumid' keys and/or NULL flag
// Same prioritization logic as 'userid' and 'ip' above
if (isNaN(albumid)) {
this.andWhere(function () {
if (filterObj.queries.exclude.albumid) {
this.whereNotIn('albumid', filterObj.queries.exclude.albumid)
} else if (filterObj.queries.albumid) {
this.orWhereIn('albumid', filterObj.queries.albumid)
}
// ...
if ((filterObj.queries.exclude.albumid && filterObj.flags.albumidNull !== false) ||
(filterObj.queries.albumid && filterObj.flags.albumidNull) ||
(!filterObj.queries.exclude.albumid && !filterObj.queries.albumid && filterObj.flags.albumidNull)) {
this.orWhereNull('albumid')
} else if (filterObj.flags.albumidNull === false) {
this.whereNotNull('albumid')
}
})
} else if (!all) {
// If not listing all uploads, list uploads from user's album
this.andWhere('albumid', req.path_parameters.albumid)
}
// Then, refine using the supplied 'date' ranges
this.andWhere(function () {
if (!filterObj.queries.date ||
(!filterObj.queries.date.from && !filterObj.queries.date.to)) {
return
}
if (typeof filterObj.queries.date.from === 'number') {
if (typeof filterObj.queries.date.to === 'number') {
this.andWhereBetween('timestamp', [filterObj.queries.date.from, filterObj.queries.date.to])
} else {
this.andWhere('timestamp', '>=', filterObj.queries.date.from)
}
} else {
this.andWhere('timestamp', '<=', filterObj.queries.date.to)
}
})
// Then, refine using the supplied 'expiry' ranges
this.andWhere(function () {
if (!filterObj.queries.expiry ||
(!filterObj.queries.expiry.from && !filterObj.queries.expiry.to)) {
return
}
if (typeof filterObj.queries.expiry.from === 'number') {
if (typeof filterObj.queries.expiry.to === 'number') {
this.andWhereBetween('expirydate', [filterObj.queries.expiry.from, filterObj.queries.expiry.to])
} else {
this.andWhere('expirydate', '>=', filterObj.queries.expiry.from)
}
} else {
this.andWhere('expirydate', '<=', filterObj.queries.expiry.to)
}
})
// Then, refine using type-is flags
this.andWhere(function () {
for (const type of filterObj.typeIs) {
let func
let operator
if (filterObj.flags[`is${type}`] === true) {
func = 'orWhere'
operator = 'like'
} else if (filterObj.flags[`is${type}`] === false) {
func = 'andWhere'
operator = 'not like'
}
if (func) {
for (const pattern of utils[`${type}Exts`].map(ext => `%${ext}`)) {
this[func]('name', operator, pattern)
}
}
}
})
// Then, refine using the supplied keywords against their file names
this.andWhere(function () {
if (!filterObj.queries.text) return
for (const pattern of filterObj.queries.text) {
this.orWhereRaw('?? like ? escape ?', ['name', pattern, '\\'])
this.orWhereRaw('?? like ? escape ?', ['original', pattern, '\\'])
}
})
// Finally, refine using the supplied exclusions against their file names
this.andWhere(function () {
if (!filterObj.queries.exclude.text) return
for (const pattern of filterObj.queries.exclude.text) {
this.andWhereRaw('?? not like ? escape ?', ['name', pattern, '\\'])
this.andWhereRaw('?? not like ? escape ?', ['original', pattern, '\\'])
}
})
}
// Base result object
const result = { success: true, files: [], uploadsPerPage, count: 0, basedomain }
// Query uploads count for pagination
result.count = await utils.db.table('files')
.where(filter)
.count('id as count')
.then(rows => rows[0].count)
if (!result.count) {
return res.json(result)
}
let offset = req.path_parameters && Number(req.path_parameters.page)
if (isNaN(offset)) {
offset = 0
} else if (offset < 0) {
offset = Math.max(0, Math.ceil(result.count / uploadsPerPage) + offset)
}
// Database columns to query
const columns = ['id', 'name', 'original', 'userid', 'size', 'timestamp']
if (utils.retentions.enabled) {
columns.push('expirydate')
}
const filterByAlbums = filterObj.queries.albumid ||
filterObj.queries.exclude.albumid ||
filterObj.flags.albumidNull !== undefined
// If not listing all uploads, OR specifically filtering by album IDs
if (!all || filterByAlbums) {
columns.push('albumid')
}
// Only select IPs if we are listing all uploads
if (all) {
columns.push('ip')
}
// Build raw query for order by (sorting) operation
let orderByRaw
if (sortObj.parsed.length) {
orderByRaw = sortObj.parsed.map(sort => {
// Use Knex.raw() to sanitize user inputs
if (sort.cast) {
return utils.db.raw(`cast (?? as ${sort.cast}) ${sort.order} ${sort.clause}`.trim(), sort.column)
} else {
return utils.db.raw(`?? ${sort.order} ${sort.clause}`.trim(), sort.column)
}
}).join(', ')
} else {
orderByRaw = '`id` desc'
}
result.files = await utils.db.table('files')
.where(filter)
.orderByRaw(orderByRaw)
.limit(uploadsPerPage)
.offset(uploadsPerPage * offset)
.select(columns)
if (!result.files.length) {
return res.json(result)
}
for (const file of result.files) {
file.extname = utils.extname(file.name)
if (utils.mayGenerateThumb(file.extname)) {
file.thumb = `thumbs/${file.name.slice(0, -file.extname.length)}.png`
}
}
result.albums = {}
// If not listing all uploads, OR specifically filtering by album IDs
if (!all || filterByAlbums) {
const albumids = result.files
.map(file => file.albumid)
.filter(utils.filterUniquifySqlArray)
result.albums = await utils.db.table('albums')
.where(function () {
this.whereIn('id', albumids)
// Only include data of disabled albums if listing all uploads
// and filtering by album IDs
if (!all) {
this.andWhere('enabled', 1)
}
})
.select('id', 'name', 'enabled')
.then(rows => {
// Build Object indexed by their IDs
const obj = {}
for (const row of rows) {
obj[row.id] = row.name
}
return obj
})
// If filtering by album IDs,
// then filter out uploads with missing albums data (assume disabled/deleted)
if (filterByAlbums) {
result.files = result.files.filter(file => result.albums[file.albumid] !== undefined)
}
}
// If we are not listing all uploads, send response
if (!all) {
return res.json(result)
}
// Otherwise proceed to querying usernames
let usersTable = filterObj.uploaders
if (!usersTable.length) {
const userids = result.files
.map(file => file.userid)
.filter(utils.filterUniquifySqlArray)
// If there are no uploads attached to a registered user, send response
if (!userids.length) {
return res.json(result)
}
// Query usernames of user IDs from currently selected files
usersTable = await utils.db.table('users')
.whereIn('id', userids)
.select('id', 'username')
}
result.users = {}
for (const user of usersTable) {
result.users[user.id] = user.username
}
return res.json(result)
}
/** Get file info */
self.get = async (req, res) => {
const ismoderator = perms.is(req.locals.user, 'moderator')
const identifier = req.path_parameters && req.path_parameters.identifier
if (identifier === undefined) {
throw new ClientError('No identifier provided.')
}
const file = await utils.db.table('files')
.where('name', identifier)
.where(function () {
// Only allow moderators to get any files' information
if (!ismoderator) {
this.where('userid', req.locals.user.id)
}
})
.first()
if (!file) {
throw new ClientError('File not found.', { statusCode: 404 })
}
return res.json({ success: true, file })
}
module.exports = self