ytmp3.ing [youtube] [downloader] [audio] [video] [api.ytmp3.ing]

/*
  base            : https://ytmp3.ing/
  by              : wolep
  last update     : 19 May 2025 - 07:00
  auditional note : sorry kalau code nya jelek :v, maklum masih belajar ehee
*/

(async () => {

  // main function
  const ytmp3ing = async (youtubeUrl, format = "mp3") => {

    // param 1 validation
    const regYoutubeId = /https:\/\/(www.youtube.com\/watch\?v=|youtu.be\/|youtube.com\/shorts\/|youtube.com\/watch\?v=)([^&|^?]+)/
    const videoId = youtubeUrl.match(regYoutubeId)?.[2]
    if (!videoId) throw Error("invalid youtube link")

    // param 2 validation
    const availableFormat = ["mp3", "mp4"]
    const formatIndex = availableFormat.findIndex(v => v == format.toLocaleLowerCase())
    if (formatIndex == -1) throw Error(`${format} is invalid format, available format : ${availableFormat.join(", ")}. pick one!`)
    const choosenUrlPath = ["/audio", "/video"][formatIndex]

    const getCookieAndToken = async () => {
      const res = await fetch("https://ytmp3.ing/")
      if (!res.ok) throw Error(`gagal fetch ${res.url} status ${res.status} ${res.statusText}`)
      const cookie = res.headers.getSetCookie() // [1 cookie csrftoken=tog1sW4B6...]
      const html = await res.text()
      const csrfmiddlewaretoken = html.match(/value="([^"]+)"/)?.[1] //1ayShcZ1K3
      if (!csrfmiddlewaretoken) throw Error(`gagal mendapatkan csrfmiddlewaretoken`)
      console.log("got cookie and csrfmiddleware token")
      return { cookie, csrfmiddlewaretoken }
    }

    const { cookie, csrfmiddlewaretoken } = await getCookieAndToken()

    const res2 = await fetch("https://ytmp3.ing" + choosenUrlPath, {
      "headers": {
        "content-type": "multipart/form-data; boundary=----WebKitFormBoundaryeByWolep",
        "x-csrftoken": csrfmiddlewaretoken,
        "cookie": cookie,
      },
      "body": "------WebKitFormBoundaryeByWolep\r\nContent-Disposition: form-data; name=\"url\"\r\n\r\n" + youtubeUrl + "\r\n------WebKitFormBoundaryeByWolep--\r\n",
      "method": "POST"
    })
    if (!res2.ok) throw Error(`gagal fetch ${res2.url}. kemungkinan karena video terlalu panjang / tidak di support. status ${res2.status} ${res2.statusText}`)
    let { url, filename } = await res2.json()
    url = atob(url)
    return ({ filename, url })
  }

  // how to use
  const yourLink = "https://www.youtube.com/watch?v=Hlyb9urvzck"

  ytmp3ing(yourLink, "mp3") // tambah param "mp4" jika mau download video
  .then(data => console.log(data))
  .catch(error => console.log(error.message))

})()

/* output
{
  filename: 'G Sounds - point the star 2 - G Sounds.mp3',
  url: 'https://api.ytmp3.ing/tunnel?id=qXAf7z_.....c8y3GSVGhDDt1nE5g'
}
  */