query string

xxx/checkpostcode/?postcode=11111

app.get('/checkpostcode', function(req, res) {
  let postcode = req.query.postcode;
  if(postcode!=11111){
    return res.status(400).send({"msg":"invalid postcode"})
  }
  return res.status(200).send({"msg":"valid postcode"})
});

params

如果通过params方式发送

axios.get('/user', {
    params: {
      ID: 12345
    }
  })

则通过以下方式来取

req.params.ID