你需要使用req.headers.host + req.url来构造它。当然，如果你是在不同的端口，你得到的想法;-)

我的代码是这样的，

params['host_url'] = req.protocol + '：//' + req.headers.host + req.url;

你可以使用node.js API来获取url，并将来自express的信息传递给URL.format()，而不是自己将这些东西连接在一起。

例子:

var url = require('url');

function fullUrl(req) {
  return url.format({
    protocol: req.protocol,
    host: req.get('host'),
    pathname: req.originalUrl
  });
}

const fullUrl = `${protocol}://${host}:${port}${url}`
      
    const responseString = `Full URL is: ${fullUrl}`;                       
    res.send(responseString);  
})

var full_address = req.protocol + "://" + req.headers.host + req.originalUrl;

or

var full_address = req.protocol + "://" + req.headers.host + req.baseUrl;

async function (request, response, next) {
  const url = request.rawHeaders[9] + request.originalUrl;
  //or
  const url = request.headers.host + request.originalUrl;
}