node.js - 七牛nodejs-sdk ECONNREFUSED error

下面是我根据开发者文档中介绍的，自己写的上传图片的代码，但是总是报连接错误，查了后说是如果设置代理，可能会有问题，我就把代理去掉了，现在没有代理还是同样的错误，大家帮帮忙看看是问什么啊？多谢各位大侠！
代码如下：
var qiniuconfig = {
access_key: 'mykey',
secret_key: 'mykey2',
bucket: 'mybucket',
expires: 30243600 //s
}

var qiniu = require('qiniu');
qiniu.conf.ACCESS_KEY = qiniuconfig.access_key;
qiniu.conf.SECRET_KEY = qiniuconfig.secret_key;

var imagesBucket = qiniuconfig.bucket;
var policy = new qiniu.rs.PutPolicy(imagesBucket);
policy.expires = qiniuconfig.expires;
var uptoken = policy.token();
var extra = new qiniu.io.PutExtra();
name = 'yy.jpg';
filepath = './6bb4d00d-be70-48f0-ac44-49cf19662c18.jpg'
qiniu.io.putFile(uptoken,name,filepath,extra,function(err,ret){
if(!err){
console.log(ret);
console.log(name);
}else{
console.log(err);
}
});