slack emoji exporter written in Node.js

slack-emoji-exporter.js

var request = require('request');
var fs = require('fs');
var url = "https://slack.com/api/emoji.list?pretty=1";
var token = "Bearer <token here>"; 

request.get({
    url : url,
    headers : {
        "Authorization" : token
    }
  }, function(error, response, body) {
    jsonBlob = JSON.parse(body);
    emojilist = jsonBlob.emoji
    for(key in emojilist){
        url = emojilist[key];
        // ignore alias
        if(url.match(/alias/)){
            continue;
        }

        extention = url.match(/\.[^\.]+$/);
        request
        .get(url)
        .on('response', function (res) {
        })
        .pipe(fs.createWriteStream('image/' + key + extention));
    }
  });