这几个url的值是固定的吗，如果不是，应该是什么值呢，还有如何获取返回的key和hash值呢

[mosquito18]

var getPolicy = new Auth.GetPolicy();
let url = getPolicy.makeRequest('http://7xp19y.com2.z0.glb.qiniucdn.com/5.jpg');
//fetch from this url

//image sync operation
var imgInfo = new ImgOps.ImageView(1,100,200);
let url = imgInfo.makeRequest('http://7xoaqn.com2.z0.glb.qiniucdn.com/16704/6806d20a359f43c88f1cb3c59980e5ef');
//fetch from this url

//image info
var self = this;
var imgInfo = new ImgOps.ImageInfo();
let url = imgInfo.makeRequest('http://7xoaqn.com2.z0.glb.qiniucdn.com/16704/6806d20a359f43c88f1cb3c59980e5ef'