Download file by http with progress (ES6, promises, NodeJS 12.x)

download.js

import fs from 'fs'
import http from 'http'
import { basename } from 'path'
import { URL } from 'url'

const TIMEOUT = 10000

export default function (url, path) {
  const uri = new URL(url)
  if (!path) {
    path = basename(uri.pathname)
  }

  return new Promise(function (resolve, reject) {
    const request = http.get(uri.href).on('response', function (res) {
      const len = parseInt(res.headers['content-length'] as string, 10)
      let downloaded = 0
      let percent = '0.00'

      if (res.statusCode !== 200) {
        reject(new Error(`Download request failed, response status: ${res.statusCode} ${res.statusMessage}`))
        return
      }
      const file = fs.createWriteStream(path, { flags: 'wx' })
      res
        .on('data', function (chunk) {
          file.write(chunk)
          downloaded += chunk.length
          percent = (100.0 * downloaded / len).toFixed(2)
          process.stdout.write(`Downloading ${percent}% ${downloaded} bytes\r`)
        })
        .on('end', function () {
          file.end()
          // console.log(`${uri.pathname} downloaded to: ${path}`)
          resolve()
        })
        .on('error', function (err) {
          file.destroy()
          // eslint-disable-next-line @typescript-eslint/no-empty-function
          fs.unlink(path, () => { })
          reject(err)
        })
    })
    request.setTimeout(TIMEOUT, function () {
      request.abort()
      reject(new Error(`request timeout after ${TIMEOUT / 1000.0}s`))
    })
  })
}