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import { basename } from 'path'
import { Upload, UploadOptions } from 'tus-js-client'
import { stat } from 'fs/promises'
import pMap from 'p-map'
import type { Readable } from 'stream'
import type { Assembly, UploadProgress } from './Transloadit'
const log = debug('transloadit')
interface SendTusRequestOptions {
streamsMap: Record<string, Stream>
assembly: Assembly
requestedChunkSize: number
uploadConcurrency: number
onProgress: (options: UploadProgress) => void
}
export async function sendTusRequest({
streamsMap,
assembly,
requestedChunkSize,
uploadConcurrency,
onProgress,
}: SendTusRequestOptions) {
const streamLabels = Object.keys(streamsMap)
let totalBytes = 0
let lastEmittedProgress = 0
const sizes: Record<string, number> = {}
const haveUnknownLengthStreams = streamLabels.some((label) => !streamsMap[label]!.path)
// Initialize size data
await pMap(
streamLabels,
async (label) => {
const { path } = streamsMap[label]!
if (path) {
const { size } = await stat(path)
sizes[label] = size
totalBytes += size
}
},
{ concurrency: 5 }
)
const uploadProgresses: Record<string, number> = {}
async function uploadSingleStream(label: string) {
uploadProgresses[label] = 0
const { stream, path } = streamsMap[label]!
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
if (chunkSize === 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
await new Promise<void>((resolve, reject) => {
const tusOptions: UploadOptions = {
endpoint: assembly.tus_url,
metadata: {
assembly_url: assembly.assembly_ssl_url,
fieldname: label,
filename,
},
onError: reject,
onProgress: onTusProgress,
onSuccess: resolve,
}
// tus-js-client doesn't like undefined/null
if (size != null) tusOptions.uploadSize = size
if (chunkSize) tusOptions.chunkSize = chunkSize
if (uploadLengthDeferred) tusOptions.uploadLengthDeferred = uploadLengthDeferred
const tusUpload = new Upload(stream, tusOptions)
tusUpload.start()
})
log(label, 'upload done')
}
await pMap(streamLabels, uploadSingleStream, { concurrency: uploadConcurrency })
}
export interface Stream {
path?: string
stream: Readable
}
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