How to work with the form element correctly using the server on express?

Question

JavaScript

Wrote the simplest server on express. I want to practice building a simple app with authentication etc. The question arose, how to work with a form that sends data from the client?
the form itself sends data in a very interesting way.

peername: { address: '::ffff:127.0.0.1', family: 'IPv6', port: 55466 },
    timeout: 0,
    [Symbol(async_id_symbol)]: 10,
    [Symbol(kHandle)]: TCP {
      reading: true,
      onconnection: null,
      _consumed: true,
      [Symbol(owner_symbol)]: [Circular *1]
    },
    [Symbol(kSetNoDelay)]: false,
    [Symbol(lastWriteQueueSize)]: 0,
    [Symbol(timeout)]: Timeout {
      _idleTimeout: -1,
      _idlePrev: null,
      _idleNext: null,
      _idleStart: 380,
      _onTimeout: null,
      _timerArgs: undefined,
      _repeat: null,
      _destroyed: true,
      [Symbol(refed)]: false,
      [Symbol(kHasPrimitive)]: false,
      [Symbol(asyncId)]: 24,
      [Symbol(triggerId)]: 21
    },
    [Symbol(kBuffer)]: null,
    [Symbol(kBufferCb)]: null,
    [Symbol(kBufferGen)]: null,
    [Symbol(kCapture)]: false,
    [Symbol(kBytesRead)]: 0,
    [Symbol(kBytesWritten)]: 0,
    [Symbol(RequestTimeout)]: undefined
  },
  _consuming: false,
  _dumped: false,
  next: [Function: next],
  baseUrl: '',
  originalUrl: '/test',
  _parsedUrl: Url {
    protocol: null,
    slashes: null,
    auth: null,
    host: null,
    port: null,
    hostname: null,
    hash: null,
    search: null,
    query: null,
    pathname: '/test',
    path: '/test',
    href: '/test',
    _raw: '/test'
  },
  params: {},
  query: {},
  res: <ref *3> ServerResponse {
    _events: [Object: null prototype] {
      finish: [Array],
      end: [Function: onevent]
    },
    _eventsCount: 2,
    _maxListeners: undefined,
    outputData: [],
    outputSize: 0,
    writable: true,
    destroyed: false,
    _last: false,
    chunkedEncoding: false,
    shouldKeepAlive: true,
    maxRequestsOnConnectionReached: false,
    _defaultKeepAlive: true,
    useChunkedEncodingByDefault: true,
    sendDate: true,
    _removedConnection: false,
    _removedContLen: false,
    _removedTE: false,
    _contentLength: null,
    _hasBody: true,
    _trailer: '',
    finished: false,
    _headerSent: false,
    _closed: false,
    socket: <ref *1> Socket {
      connecting: false,
      _hadError: false,
      _parent: null,
      _host: null,
      _readableState: [ReadableState],
      _events: [Object: null prototype],
      _eventsCount: 8,
      _maxListeners: undefined,
      _writableState: [WritableState],
      allowHalfOpen: true,
      _sockname: null,
      _pendingData: null,
      _pendingEncoding: '',
      server: [Server],
      _server: [Server],
      parser: [HTTPParser],
      on: [Function: socketListenerWrap],
      addListener: [Function: socketListenerWrap],
      prependListener: [Function: socketListenerWrap],
      setEncoding: [Function: socketSetEncoding],
      _paused: false,
      _httpMessage: [Circular *3],
      _peername: [Object],
      timeout: 0,
      [Symbol(async_id_symbol)]: 10,
      [Symbol(kHandle)]: [TCP],
      [Symbol(kSetNoDelay)]: false,
      [Symbol(lastWriteQueueSize)]: 0,
      [Symbol(timeout)]: Timeout {
        _idleTimeout: -1,
        _idlePrev: null,
        _idleNext: null,
        _idleStart: 380,
        _onTimeout: null,
        _timerArgs: undefined,
        _repeat: null,
        _destroyed: true,
        [Symbol(refed)]: false,
        [Symbol(kHasPrimitive)]: false,
        [Symbol(asyncId)]: 24,
        [Symbol(triggerId)]: 21
      },
      [Symbol(kBuffer)]: null,
      [Symbol(kBufferCb)]: null,
      [Symbol(kBufferGen)]: null,
      [Symbol(kCapture)]: false,
      [Symbol(kBytesRead)]: 0,
      [Symbol(kBytesWritten)]: 0,
      [Symbol(RequestTimeout)]: undefined
    },
    _header: null,
    _keepAliveTimeout: 5000,
    _onPendingData: [Function: bound updateOutgoingData],
    req: [Circular *2],
    _sent100: false,
    _expect_continue: false,
    locals: [Object: null prototype] {},
    _startAt: undefined,
    _startTime: undefined,
    writeHead: [Function: writeHead],
    __onFinished: [Function: listener] { queue: [Array] },
    [Symbol(kCapture)]: false,
    [Symbol(kNeedDrain)]: false,
    [Symbol(corked)]: 0,
    [Symbol(kOutHeaders)]: [Object: null prototype] {
      'x-powered-by': [Array],
      'access-control-allow-origin': [Array]
    }
  },
  body: {},
  _body: true,
  length: undefined,
  _startAt: [ 62173, 229125300 ],
  _startTime: 2022-02-14T09:34:06.578Z,
  _remoteAddress: '::ffff:127.0.0.1',
  secret: undefined,
  cookies: [Object: null prototype] {},
  signedCookies: [Object: null prototype] {},
  route: Route { path: '/test', stack: [ [Layer] ], methods: { post: true } },
  [Symbol(kCapture)]: false,
  [Symbol(kHeaders)]: {
    host: 'localhost:3001',
    connection: 'keep-alive',
    'content-length': '0',
    'cache-control': 'max-age=0',
    'sec-ch-ua': '" Not A;Brand";v="99", "Chromium";v="98", "Google Chrome";v="98"',
    'sec-ch-ua-mobile': '?0',
    'sec-ch-ua-platform': '"Windows"',
    'upgrade-insecure-requests': '1',
    origin: 'http://127.0.0.1:5500',
    'content-type': 'application/x-www-form-urlencoded',
    'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.82 Safari/537.36',
    accept: 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
    'sec-fetch-site': 'cross-site',
    'sec-fetch-mode': 'navigate',
    'sec-fetch-user': '?1',
    'sec-fetch-dest': 'document',
    referer: 'http://127.0.0.1:5500/',
    'accept-encoding': 'gzip, deflate, br',
    'accept-language': 'ru-RU,ru;q=0.9,en-US;q=0.8,en;q=0.7'
  },
  [Symbol(kHeadersCount)]: 38,
  [Symbol(kTrailers)]: null,
  [Symbol(kTrailersCount)]: 0,
  [Symbol(RequestTimeout)]: undefined
}
POST /test 200 64.606 ms - 3

An object with a lot of code. Can this be handled normally on an express server? Or is it just not a good idea to use the default form behavior?

Answer 1

https://www.npmjs.com/package/body-parser