Html 使用节点JS向XDB提交表单

我试图在NodeJS中创建一个web应用程序，以可视化一些图形，并从表单和按钮接收用户反馈，然后将它们写入一个inflow数据库。但是，我无法理解如何处理post数据并将其正确写入db

const Influx = require("influx");
const express = require("express");
const http = require("http");
const os = require("os");
let fs = require('fs');
const app = express();
const influx = new Influx.InfluxDB({
  host: "localhost",
  database: "trial",
  schema: [
    {
      measurement: "form",
      fields: {
        name: Influx.FieldType.STRING,
        surname: Influx.FieldType.STRING
      },
      tags: ["host"],
    },
  ],
});

influx
  .getDatabaseNames()
  .then((names) => {
    if (!names.includes("trial")) {
      return influx.createDatabase("trial");
    }
  })
  .then(() => {
    http.createServer(app).listen(8000, function () {
      console.log("Listening on port 8000");
  })
  .catch((err) => {
    console.error(`Error creating Influx database!`);
  });
});

app.use((req, res, next) => {
  res.writeHead(200, {
      'Content-Type': 'text/html'
  });
  fs.readFile('grafana.html', null, function (error, data) {
      if (error) {
          res.writeHead(404);
          res.write('Whoops! File not found!');
      } else {
          res.write(data);
      }
      res.end();
  });
});

到目前为止一切正常，我能够基于HTML代码可视化网页

<form action="/info" method="post">
  First name:<br>
  <input type="text" name="name"<br>
  Last name:<br>
  <input type="text" name="surname"><br>
  <input type="submit" value="Submit">
</form>

我无法将表单数据写入数据库-数据库仍然为空，控制台不输出任何内容。我知道可能会有多个错误，因为我是web开发领域的完全初学者。我希望任何人都能帮忙

app.get('/info', function (req, res) {
  res.send('info')
});
app.post('/', function (req, res) {
  var form = {
    name: req.body.name,
    surname: req.body.surname
  };
     influx
       .writePoints([
         {
           measurement: "form",
           tags: { host: os.hostname() },
           fields: { form, path: req.path },
         },
       ])
       .catch((err) => {
         console.error(`Error saving data to InfluxDB! ${err.stack}`);
       });
    console.log(form);
 });