Batch multiple images

batch-img.js

let imageLinks = []

const async = require('async')
let fs = require('fs')
let request = require('request')
let path = require('path')

const downloadImage = (src, dest, callback) => {
  request.head(src, (err, res, body) => {
    if (err) { console.log(err); return }
    src && request(src).pipe(fs.createWriteStream(dest)).on('close', () => {
      callback && callback(null, dest)
    })
  })
}

const getSuffix = str => str.slice(str.lastIndexOf('.'))

async.mapSeries(imageLinks, function (item, callback) {
  setTimeout(function () {
    var destImage = `${item.obs_code}.png`
    downloadImage(
      item,
      destImage,
      (err, data) => {
        err ? console.log(err) : console.log(path.resolve(data))
      })
    callback && callback(null, item)
  }, 100)
})