Generate playlist config for APlayer from netease music automatically

aplayer.js

/*
* @Author: printempw
* @Date:   2016-07-25 13:03:12
* @Last Modified by:   printempw
* @Last Modified time: 2016-07-25 14:51:29
*/

var superagent = require('superagent');

// fill your ids here
var songs = [
    '40729832', 
    '629877', 
    '629880', 
    '29787857', 
    '399411850', 
    '4949085', 
    '32098023', 
    '29816800', 
    '34367795', 
    '27961148', 
    '29829320'
];

var configs = new Array();

function getSongJson(id, callback) {
    console.log('Getting details of song id.'+id)
    var url = "http://music.163.com/api/song/detail/?id="+id+"&ids=%5B"+id+"%5D";
    superagent.get(url)
              .set('Cookie', 'appver=1.5.0.75771;')
              .set('Referer','http://music.163.com/')
              .end(function(err, res) {
                  callback(JSON.parse(res.text));
              });
}

for (index in songs) {
    getSongJson(songs[index], function(json) {
        var artists = [];

        // parse artists
        for (artist in json['songs'][0]['artists']) {
            artists.push(json['songs'][0]['artists'][artist]['name']);
        }

        var config    = new Object();

        config.title  = json['songs'][0]['name'];
        config.author = artists.join(', ');

        if (json['songs'][0]['mp3Url']) {
            config.url    = json['songs'][0]['mp3Url'].replace('http://m', 'http://p');
        } else {
            console.log('Warning: Could not found song id.'+json['songs'][0]['id']+'\'s src');
        }

        config.pic    = json['songs'][0]['album']['picUrl'];

        configs.push(config);

        if (configs.length >= songs.length) {
            console.log('Parse netease music to APlayer config:\n')
            // pretty print
            console.log(JSON.stringify(configs, null, '    '));
        }
    });

}