req.body 在 Express 中返回 null

Question

我遇到了一個問題，並嘗試了無數在線解決方案。問題是 req.body 返回 null 或空，如下所示：{} 我一直在使用的代碼是這樣的：

import express from "express";
import bodyParser from "body-parser";

const app = express();
const PORT = process.env.PORT || 8348;

app.use(
  bodyParser.urlencoded({
    extended: true,
  })
);
app.use(bodyParser.json());

app.post("/", (req, res) => {
  console.log(req.body);
  res.send(req.body);
  res.end();
});

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

package.json 是這樣的：

{
  "name": "backend",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "type": "module",
  "scripts": {
    "start": "nodemon index.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.19.0",
    "express": "^4.17.1",
    "nodemon": "^2.0.15"
  }
}

Answer 1

您不再需要 bodyParser，而是使用 express 內置方法：

const express = requrie('express');
const app = express();

app.use(express.json()); // to parse json bodies and not only form-urlencoded
app.use(express.urlencoded({ extended: true }));