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import type {
FileSource,
HttpRequest,
HttpResponse,
OnSuccessPayload,
SliceResult,
UploadOptions,
} from 'tus-js-client'
import type { AssemblyStatus } from './alphalib/types/assemblyStatus.ts'
import type { UploadProgress } from './Transloadit.ts'
import { ReadStream } from 'node:fs'
import { stat } from 'node:fs/promises'
import { basename } from 'node:path'
import debug from 'debug'
import pMap from 'p-map'
import { defaultOptions, Upload } from 'tus-js-client'
const log = debug('transloadit')
const logWarn = debug('transloadit:warn')
export type UploadBehavior = 'await' | 'background' | 'none'
export interface Stream {
path?: string
stream: Readable
}
interface SendTusRequestOptions {
streamsMap: Record<string, Stream>
assembly: AssemblyStatus
requestedChunkSize: number
uploadConcurrency: number
onProgress: (options: UploadProgress) => void
signal?: AbortSignal
uploadUrls?: Record<string, string>
uploadBehavior?: UploadBehavior
onFileStreamOpened?: (stream: ReadStream) => void
onFileSliceStarted?: (slice: Promise<unknown>) => void
}
interface SendTusRequestResult {
uploadUrls: Record<string, string>
uploadsComplete?: Promise<unknown>
}
export async function sendTusRequest({
streamsMap,
assembly,
requestedChunkSize,
uploadConcurrency,
onProgress,
signal,
uploadUrls,
uploadBehavior = 'await',
onFileStreamOpened,
onFileSliceStarted,
}: SendTusRequestOptions): Promise<SendTusRequestResult> {
const streamLabels = Object.keys(streamsMap)
let totalBytes = 0
let lastEmittedProgress = 0
const sizes: Record<string, number> = {}
const uploadUrlsResult: Record<string, string> = { ...(uploadUrls ?? {}) }
const haveUnknownLengthStreams = streamLabels.some((label) => !streamsMap[label]?.path)
// Initialize size data
await pMap(
streamLabels,
async (label) => {
// Check if aborted before each operation
Iif (signal?.aborted) throw new Error('Upload aborted')
const streamInfo = streamsMap[label]
Iif (!streamInfo) {
throw new Error(`Stream info not found for label: ${label}`)
}
const { path } = streamInfo
if (path) {
const { size } = await stat(path)
sizes[label] = size
totalBytes += size
}
},
{ concurrency: 5, signal },
)
const uploadProgresses: Record<string, number> = {}
const completionPromises: Array<Promise<void>> = []
const uploadUrlPromises: Array<Promise<void>> = []
async function uploadSingleStream(label: string) {
uploadProgresses[label] = 0
const streamInfo = streamsMap[label]
Iif (!streamInfo) {
throw new Error(`Stream info not found for label: ${label}`)
}
const { stream, path } = streamInfo
const size = sizes[label]
let chunkSize = requestedChunkSize
let uploadLengthDeferred: boolean
const isStreamLengthKnown = !!path
if (!isStreamLengthKnown) {
// tus-js-client requires these options to be set for unknown size streams
// https://github.com/tus/tus-js-client/blob/master/docs/api.md#uploadlengthdeferred
uploadLengthDeferred = true
Eif (chunkSize === Number.POSITIVE_INFINITY) chunkSize = 50e6
}
const onTusProgress = (bytesUploaded: number): void => {
uploadProgresses[label] = bytesUploaded
// get all uploaded bytes for all files
let uploadedBytes = 0
for (const l of streamLabels) {
uploadedBytes += uploadProgresses[l] ?? 0
}
// don't send redundant progress
if (lastEmittedProgress < uploadedBytes) {
lastEmittedProgress = uploadedBytes
// If we have any unknown length streams, we cannot trust totalBytes
// totalBytes should then be undefined to mimic behavior of form uploads.
onProgress({
uploadedBytes,
totalBytes: haveUnknownLengthStreams ? undefined : totalBytes,
})
}
}
const filename = path ? basename(path) : label
Iif (uploadBehavior === 'none' && uploadUrls?.[label]) {
uploadUrlsResult[label] = uploadUrls[label]
uploadUrlPromises.push(Promise.resolve())
completionPromises.push(Promise.resolve())
return
}
let urlResolved = false
let resolveUrl: () => void = () => {}
let rejectUrl: (err: Error) => void = () => {}
const uploadUrlPromise = new Promise<void>((resolve, reject) => {
resolveUrl = () => {
if (urlResolved) return
urlResolved = true
resolve()
}
rejectUrl = (err) => {
if (urlResolved) return
urlResolved = true
reject(err)
}
})
let resolveCompletion: () => void = () => {}
let rejectCompletion: (err: Error) => void = () => {}
const completionPromise = new Promise<void>((resolve, reject) => {
resolveCompletion = resolve
rejectCompletion = reject
})
// If startPromise rejects first, pMap aborts before sendTusRequest reaches the aggregate awaits
// below. These bookkeeping promises still need handlers so the startPromise rejection remains
// the single error surface.
uploadUrlPromise.catch(() => {})
completionPromise.catch(() => {})
uploadUrlPromises.push(uploadUrlPromise)
completionPromises.push(completionPromise)
if (uploadUrls?.[label]) {
uploadUrlsResult[label] = uploadUrls[label]
resolveUrl()
}
const startPromise = new Promise<void>((resolvePromise, rejectPromise) => {
if (!assembly.assembly_ssl_url) {
rejectPromise(new Error('assembly_ssl_url is not present in the assembly status'))
return
}
// Check if already aborted before starting
Iif (signal?.aborted) {
rejectPromise(new Error('Upload aborted'))
return
}
// Wrap resolve/reject to clean up abort listener
let abortHandler: (() => void) | undefined
const resolve = (_payload: OnSuccessPayload) => {
if (abortHandler) signal?.removeEventListener('abort', abortHandler)
resolveCompletion()
resolveUrl()
resolvePromise()
}
const reject = (err: unknown) => {
if (abortHandler) signal?.removeEventListener('abort', abortHandler)
rejectCompletion(err as Error)
rejectUrl(err as Error)
rejectPromise(err)
}
let tusUpload: Upload
const tusOptions: UploadOptions = {
endpoint: assembly.tus_url,
uploadUrl: uploadUrls?.[label],
metadata: {
assembly_url: assembly.assembly_ssl_url,
fieldname: label,
filename,
},
httpStack: {
createRequest(method: string, url: string): HttpRequest {
const request = defaultOptions.httpStack.createRequest(method, url)
const send = request.send.bind(request)
request.send = (body: unknown): Promise<HttpResponse> => {
// tus awaits pre-request hooks, so queued aborts must be checked at send itself.
if (signal?.aborted) {
// File setup can finish after abort() and reset tus's aborted state.
tusUpload.abort()
return Promise.reject(new Error('Upload aborted'))
}
return send(body)
}
return request
},
getName(): string {
return defaultOptions.httpStack.getName()
},
},
onError: reject,
onProgress: onTusProgress,
onSuccess: resolve,
onUploadUrlAvailable: () => {
const url = tusUpload?.url
Eif (url) {
uploadUrlsResult[label] = url
}
resolveUrl()
Iif (uploadBehavior === 'none') {
tusUpload.abort()
resolveCompletion()
}
},
}
if (onFileStreamOpened) {
// tus opens a separate ReadStream for each chunk; abort() leaves those streams open.
// Track those chunks even when the original file stream belongs to the caller.
tusOptions.fileReader = {
async openFile(input: unknown, chunkSize: number): Promise<FileSource> {
const source = await defaultOptions.fileReader.openFile(input, chunkSize)
return {
size: source.size,
async slice(start: number, end: number): Promise<SliceResult> {
Iif (signal?.aborted) throw new Error('Upload aborted')
const reading = source.slice(start, end).then((chunk) => {
// tus-js-client declares platform-specific chunk values as any.
const value: unknown = chunk.value
if (value instanceof ReadStream) onFileStreamOpened(value)
if (signal?.aborted) throw new Error('Upload aborted')
return chunk
})
// A file slice can open its stream before the promise resolves.
if (input instanceof ReadStream && input.path != null) {
onFileSliceStarted?.(reading)
}
return await reading
},
close() {
source.close()
},
}
},
}
}
// tus-js-client doesn't like undefined/null
if (size != null) tusOptions.uploadSize = size
Eif (chunkSize) tusOptions.chunkSize = chunkSize
if (uploadLengthDeferred) tusOptions.uploadLengthDeferred = uploadLengthDeferred
tusUpload = new Upload(stream, tusOptions)
// Handle abort signal
if (signal) {
abortHandler = () => {
tusUpload.abort()
reject(new Error('Upload aborted'))
}
signal.addEventListener('abort', abortHandler, { once: true })
}
tusUpload.start()
})
Eif (uploadBehavior === 'await') {
await startPromise
log(label, 'upload done')
return
}
startPromise.catch((err) => {
logWarn('Background upload failed', err)
})
await uploadUrlPromise
log(label, 'upload started')
}
await pMap(streamLabels, uploadSingleStream, { concurrency: uploadConcurrency, signal })
await Promise.all(uploadUrlPromises)
const uploadsComplete = Promise.allSettled(completionPromises)
if (uploadBehavior === 'await') {
await Promise.all(completionPromises)
} else E{
uploadsComplete.catch((err) => {
logWarn('Background upload failed', err)
})
}
return { uploadUrls: uploadUrlsResult, uploadsComplete }
}
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