如何扩展缩短的网址

Question

我正在尝试构建URL缩写。我可以使用npm模块'shortid'成功缩短网址。但是无法将其扩展回去。我已经尝试过'resuest'，'unshort'和'url-unshort'npm模块。我可以使用哪个其他模块来扩展缩短的网址？

POST：http://localhost:7000/api/item

{     “ originalUrl”：“ https://www.amazon.in/Apple-iPhone-X-Silver-256GB/dp/B071P37652/ref=sr_1_1?s=electronics&ie=UTF8&qid=1522661136&sr=1-1&keywords=iphone”，     “ shortBaseUrl”：“ http://localhost” }

返回缩短的网址：http://localhost/HkEb8OAGm

let uu = require('url-unshort')();

 //to get the expanded url
app.get("/api/item/:code", async (req, res) => {

const urlCode = req.params.code;
console.log(req.params.code);
const item = await UrlShorten.findOne({ urlCode: urlCode });
if(item){
  var shortU = item.shortUrl;
  uu.expand(shortU)
.then(url => {
  if (url) console.log('Original url is: ${url}');

    else console.log('This url can\'t be expanded');
})
.catch(err => console.log(err));
}

});

Rest of the code

谢谢。