server.js

express_app.js

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

app.listen(3000, () => {
  console.log("Server running on port 3000");
});

app.all("/", (req, res) => {
  res.set({
    "Content-Type": "application/json",
  });

  const itemUrl = req.query.item_url || (req.body && req.body.item_url); // itemUrl passed in GET query params / POST body

  // send back to client
  res.send({
    details: {
      /* parsed payload goes here */
    },
  });
});