Files
video-downloader/worker/processor.ts
T
anthonyandClaude Sonnet 5 27ba48d181 feat: gate download options on real-time yt-dlp video analysis
Options (quality, subtitles) are now derived from a yt-dlp -J probe of
the submitted URL instead of a static list, so users can't pick
combinations the source video doesn't actually support. Submission is
blocked until the probe succeeds.

- New /api/probe endpoint + src/lib/ytdlp-probe.ts, with its own rate
  limiter (rate-limit.ts refactored into a createRateLimiter factory).
- New options: subtitle language selection, clip start/end trim, MP3
  audio quality.
- Fixed buildYtdlpArgs: format=mp3 never triggered audio extraction
  (-x/--audio-format), and quality=best never applied --merge-output-format,
  so the chosen container had no real effect.
- Cross-platform yt-dlp invocation: the bundled bin/yt-dlp is a Python
  zipapp relying on a shebang, which Windows' spawn() can't run
  directly. buildYtdlpCommand() runs it through `python` on Windows and
  execs it directly on Linux/o2switch, where the shebang works natively.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-08-11 14:13:38 +02:00

67 lines
2.1 KiB
TypeScript

import { spawn } from 'child_process'
import { readdirSync, statSync } from 'fs'
import path from 'path'
import { prisma } from '@/lib/prisma'
import { buildYtdlpArgs, buildYtdlpCommand } from '@/lib/ytdlp'
import { createToken } from '@/lib/token'
import { config } from '../config/app.config'
export async function processDownload(downloadId: string): Promise<void> {
const download = await prisma.download.findUnique({ where: { id: downloadId } })
if (!download) return
const args = buildYtdlpArgs({
url: download.url,
uuid: download.uuid,
format: download.format,
quality: download.quality,
subtitles: download.subtitles,
subtitleLangs: download.subtitleLangs ? download.subtitleLangs.split(',') : null,
clipStart: download.clipStart,
clipEnd: download.clipEnd,
audioQuality: download.audioQuality,
extraArgs: download.extraArgs,
})
let stderr = ''
const { command, args: spawnArgs } = buildYtdlpCommand(args)
await new Promise<void>((resolve) => {
const proc = spawn(command, spawnArgs)
proc.stderr.on('data', (chunk: Buffer) => { stderr += chunk.toString() })
proc.on('close', async (code) => {
if (code === 0) {
const files = readdirSync(config.STORAGE_PATH).filter((f) =>
f.startsWith(download.uuid)
)
const relFile = files[0] ?? null
const filePath = relFile ? path.join(config.STORAGE_PATH, relFile) : null
const fileSize = filePath ? BigInt(statSync(filePath).size) : null
await prisma.download.update({
where: { id: downloadId },
data: {
status: 'DONE',
filePath,
fileName: relFile,
fileSize,
completedAt: new Date(),
},
})
await createToken(downloadId)
} else {
await prisma.download.update({
where: { id: downloadId },
data: {
status: 'FAILED',
errorMsg: stderr || `yt-dlp exited with code ${code}`,
completedAt: new Date(),
},
})
}
resolve()
})
})
}