Unable to fetch html hidden input values into express app

问题

I'm trying to fetch some hidden form values in post route of my express app,but getting undefined objects in post route,below is some code snippet

const express = require("express")
const app   =   express();

const bodyParser = require('body-parser');
app.use(bodyParser.json());

app.listen(3000, () => {
    console.log('Authentication service started on port 3000');
});

app.get("/link",(req,res)=>{
    let token = 124578
   let link="http://"+req.get('host')+"/postmethod";
    console.log("hyperlink:"+link)
    let formHtmlPostLink="<form method='post' action='"+link+"'>    <input type='hidden' name='bearer' value='"+token+"'> <input type='hidden' name='test' value='test'> <button type='submit' name='submit_param' value='submit_value' class='link-button'>      Reset Password         </button>       </form>"
    res.send(formHtmlPostLink)
})
app.post("/postmethod",(req,res)=>{
    res.send(req.body)//undefined objects
})

回答1:

If you are able to submit form to /postmethod, add middleware bodyParser.urlencoded()

app.use(bodyParser.urlencoded());

If form is not being submitted, change link to relative url

  let link = "/postmethod";

Check codesandbox

来源：https://stackoverflow.com/questions/62064535/unable-to-fetch-html-hidden-input-values-into-express-app