Nodejs：通过循环链接数组下载多个文件时出错

Question

var ultUrls = [{

  url: 'https://i.redd.it/kl44uq60z4631.png',

  name: 'pics/A bison in steam during winter at Yellowstone National Park.png'

}, {

  url: 'https://i.redd.it/9eocp20xr6631.jpg',

  name: 'pics/Athens at night.jpg'

}, {

  url: 'https://i.redd.it/0gezn9zjr6631.jpg',

  name: 'pics/This is Rayne. Her favorite color is orange. Her job is a clown for the circus. Her motto is *honk honk*..jpg'

}, {

  url: 'https://i.redd.it/fxcivargr6631.png',

  name: 'pics/Reddit your input is greatly appreciated.png'

}, {

  url: 'https://i.redd.it/xzpukskhr6631.jpg',

  name: 'pics/Cranberry lake Ontario.jpg'

}, {

  url: 'https://i.redd.it/4mplt3joh5631.jpg',

  name: 'pics/Pics of insects are the best.jpg'

}, {

  url: 'https://i.redd.it/03q4c5ndq6631.jpg',

  name: 'pics/Elvis Presley during his service in the U.S. Army.jpg'

}]

下载此数组中的文件时，我收到了 ENONENT：没有这样的文件或目录，请打开...

 var downloadImages = function(callback) {

    ultUrls.forEach( function(str) {

     download_file_httpget(str.url, str.name, function(){console.log('Finished Downloading' + filename)});

   });

 }

var download_file_httpget = function(url, dest, callback){

     request.get(url)

     .on('error', function(err) {console.log(err)} )

     .pipe(fs.createWriteStream(dest))

     .on('close', callback);

 };