mirror of
https://github.com/BobbyWibowo/lolisafe.git
synced 2024-12-13 07:56:23 +00:00
feat: busboy limits and multipart errors handler
unfortunately to capture multipart errors, we have to wrap the entire callback function with try-catch block but it appears overall processing is still slightly faster than expressjs + multer
This commit is contained in:
Bobby Wibowo
parent
68b230702e
commit
0f6409132a
@ -219,152 +219,189 @@ self.upload = async (req, res) => {
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req.body = {}
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// Initially try to parse as multipart
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await req.multipart(async field => {
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// Keep non-files fields in Request.body
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if (field.truncated) {
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// Re-map Dropzone chunked uploads keys so people can manually use the API without prepending 'dz'
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let name = field.name
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if (name.startsWith('dz')) name = name.replace(/^dz/, '')
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req.body[name] = field.value
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return
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const multipartErrors = []
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await req.multipart({
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// https://github.com/mscdex/busboy/tree/v1.6.0#exports
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limits: {
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fileSize: maxSizeBytes,
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// Maximum number of non-file fields.
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// Dropzone.js will add 6 extra fields for chunked uploads.
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// We don't use them for anything else.
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fields: 6,
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// Maximum number of file fields.
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// Chunked uploads still need to provide ONLY 1 file field.
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// Otherwise, only one of the files will end up being properly stored,
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// and that will also be as a chunk.
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files: maxFilesPerUpload
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}
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if (!field.file) {
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throw new Error(`Unexpected non-truncated and non-file field: ${field.name}`)
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}
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// Init Request.files array if not previously set
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if (req.files === undefined) {
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req.files = []
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}
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// NOTE: Since busboy@1, filenames are not automatically parsed as UTF-8, so we force it here
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const originalname = field.file.name &&
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Buffer.from(field.file.name, 'latin1').toString('utf8')
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const extname = utils.extname(originalname)
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if (self.isExtensionFiltered(extname)) {
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throw new ClientError(`${extname ? `${extname.substr(1).toUpperCase()} files` : 'Files with no extension'} are not permitted.`)
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}
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if (req.body.chunkindex !== undefined && !chunkedUploads) {
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throw new ClientError('Chunked uploads are disabled at the moment.')
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}
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// Is it a chunk file?
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const isChunk = chunkedUploads &&
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req.body.uuid !== undefined &&
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req.body.chunkindex !== undefined
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let chunksData
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let destination
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let filename
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if (isChunk) {
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// Calling this will also reset its timeout
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chunksData = await initChunks(req.body.uuid)
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destination = chunksData.root
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filename = chunksData.filename
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} else {
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const length = self.parseFileIdentifierLength(req.headers.filelength)
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destination = paths.uploads
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filename = await self.getUniqueRandomName(length, extname)
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}
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// Write the file into disk, and return an object containing the required file information
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const file = await new Promise((resolve, reject) => {
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// "weighted" resolve function, to be able to "await" multiple callbacks
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const REQUIRED_WEIGHT = 2
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let tempObject = { originalname, extname }
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let tempWeight = 0
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const _resolve = (result = {}, weight = 2) => {
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tempWeight += weight
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tempObject = Object.assign(result, tempObject)
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if (tempWeight >= REQUIRED_WEIGHT) {
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resolve(tempObject)
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}, async field => {
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// Wrap this to capture errors within this callback
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try {
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// Keep non-files fields in Request.body
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// Since fields get processed in sequence depending on the order at which they were defined,
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// chunked uploads data must be set before the files[] field which contain the actual file
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if (field.truncated) {
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// Re-map Dropzone chunked uploads keys so people can manually use the API without prepending 'dz'
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let name = field.name
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if (name.startsWith('dz')) {
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name = name.replace(/^dz/, '')
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}
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req.body[name] = field.value
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return
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}
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let outStream
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let hash
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let scanStream
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const onerror = error => {
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hash.dispose()
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reject(error)
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if (!field.file) {
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throw new ClientError(`Unexpected field: "${field.name}"`)
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}
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const finalPath = path.join(destination, filename)
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// Init Request.files array if not previously set
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if (req.files === undefined) {
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req.files = []
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}
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// NOTE: Since busboy@1, filenames no longer get automatically parsed as UTF-8, so we force it here
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const originalname = field.file.name &&
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Buffer.from(field.file.name, 'latin1').toString('utf8')
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const extname = utils.extname(originalname)
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if (self.isExtensionFiltered(extname)) {
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throw new ClientError(`${extname ? `${extname.substr(1).toUpperCase()} files` : 'Files with no extension'} are not permitted.`)
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}
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if (req.body.chunkindex !== undefined && !chunkedUploads) {
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throw new ClientError('Chunked uploads are disabled at the moment.')
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}
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// Is it a chunk file?
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const isChunk = chunkedUploads &&
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req.body.uuid !== undefined &&
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req.body.chunkindex !== undefined
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let chunksData
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let destination
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let filename
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if (isChunk) {
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if (!chunksData.stream) {
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chunksData.stream = fs.createWriteStream(finalPath, { flags: 'a' })
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chunksData.stream.on('error', onerror)
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}
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if (!chunksData.hasher) {
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chunksData.hasher = blake3.createHash()
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}
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outStream = chunksData.stream
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hash = chunksData.hasher
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// Calling this will also reset its timeout
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chunksData = await initChunks(req.body.uuid)
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destination = chunksData.root
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filename = chunksData.filename
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} else {
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outStream = fs.createWriteStream(finalPath)
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outStream.on('error', onerror)
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hash = blake3.createHash()
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const length = self.parseFileIdentifierLength(req.headers.filelength)
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destination = paths.uploads
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filename = await self.getUniqueRandomName(length, extname)
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}
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if (utils.scan.passthrough &&
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// Write the file into disk, and return an object containing the required file information
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const file = await new Promise((resolve, reject) => {
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// "weighted" resolve function, to be able to "await" multiple callbacks
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const REQUIRED_WEIGHT = 2
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let tempObject = { originalname, extname }
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let tempWeight = 0
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const _resolve = (result = {}, weight = 2) => {
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tempWeight += weight
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tempObject = Object.assign(result, tempObject)
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if (tempWeight >= REQUIRED_WEIGHT) {
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resolve(tempObject)
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}
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}
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let outStream
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let hash
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let scanStream
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const onerror = error => {
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hash.dispose()
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reject(error)
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}
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const finalPath = path.join(destination, filename)
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if (isChunk) {
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if (!chunksData.stream) {
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chunksData.stream = fs.createWriteStream(finalPath, { flags: 'a' })
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chunksData.stream.on('error', onerror)
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}
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if (!chunksData.hasher) {
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chunksData.hasher = blake3.createHash()
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}
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outStream = chunksData.stream
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hash = chunksData.hasher
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} else {
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outStream = fs.createWriteStream(finalPath)
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outStream.on('error', onerror)
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hash = blake3.createHash()
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if (utils.scan.passthrough &&
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!self.scanHelpers.assertUserBypass(req._user, filename) &&
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!self.scanHelpers.assertFileBypass({ filename })) {
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scanStream = utils.scan.instance.passthrough()
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scanStream = utils.scan.instance.passthrough()
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}
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}
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}
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field.file.stream.on('error', onerror)
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field.file.stream.on('data', d => hash.update(d))
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field.file.stream.on('error', onerror)
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field.file.stream.on('data', d => hash.update(d))
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if (isChunk) {
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field.file.stream.on('end', () => {
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_resolve({
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destination,
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filename,
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path: finalPath
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if (isChunk) {
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field.file.stream.on('end', () => {
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_resolve({
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destination,
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filename,
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path: finalPath
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})
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})
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})
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field.file.stream.pipe(outStream, { end: false })
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} else {
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outStream.on('finish', () => {
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_resolve({
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destination,
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filename,
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path: finalPath,
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size: outStream.bytesWritten,
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hash: hash.digest('hex')
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}, scanStream ? 1 : 2)
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})
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if (scanStream) {
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logger.debug(`[ClamAV]: ${filename}: Passthrough scanning\u2026`)
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scanStream.on('error', onerror)
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scanStream.on('scan-complete', scan => {
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_resolve({ scan }, 1)
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})
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field.file.stream.pipe(scanStream).pipe(outStream)
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field.file.stream.pipe(outStream, { end: false })
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} else {
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field.file.stream.pipe(outStream)
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}
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}
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})
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outStream.on('finish', () => {
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_resolve({
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destination,
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filename,
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path: finalPath,
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size: outStream.bytesWritten,
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hash: hash.digest('hex')
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}, scanStream ? 1 : 2)
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})
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// Push file to Request.files array
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req.files.push(file)
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if (scanStream) {
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logger.debug(`[ClamAV]: ${filename}: Passthrough scanning\u2026`)
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scanStream.on('error', onerror)
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scanStream.on('scan-complete', scan => {
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_resolve({ scan }, 1)
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})
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field.file.stream.pipe(scanStream).pipe(outStream)
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} else {
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field.file.stream.pipe(outStream)
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}
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}
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})
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// Push file to Request.files array
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req.files.push(file)
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} catch (error) {
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multipartErrors.push(error)
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}
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}).catch(error => {
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// MulipartField may throw string errors
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// res.multipart() itself may throw string errors
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if (typeof error === 'string') {
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throw new ServerError(error)
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throw new ClientError(error)
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} else {
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throw error
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}
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})
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if (multipartErrors.length) {
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for (let i = 1; i < multipartErrors.length; i++) {
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if (multipartErrors[i] instanceof ClientError ||
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multipartErrors[i] instanceof ServerError) {
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continue
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}
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// Log additional errors to console if they are not generic ClientError or ServeError
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logger.error(multipartErrors[i])
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}
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// Re-throw the first multipart error into global error handler
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throw multipartErrors[0]
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}
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if (Array.isArray(req.files)) {
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return self.actuallyUpload(req, res, user, albumid, age)
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} else {
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