Node.js 在控制台打印回未定义的属性

Question

我正在尝试打印 post 后返回的一些数据，但它打印时未定义。解析器设置是否正确？

服务器文件

const taskController = require("./controllers/registration");
const express = require('express')
const parser = require('body-parser');
const app = express()
const router = express.Router();

app.use(parser.urlencoded({extended:false}));
app.use(parser.json());

app.use("/api", router);

router.route("/register").post(taskController.register);
router.route("/login").get(taskController.login);
router.route("/logout").get(taskController.logout);
var server = app.listen(3000);

控制器

var server = require('../app.js')
const mysql = require('mysql');

exports.register = function(req, res){
  console.log(req.body.fName);
  console.log(req.body.lName);
  console.log(req.body.id);
  res.send("Registering");
};

谢谢。

Answer 1

我在本地收到了您的代码和运行。我做路由器更改最后我使用 curl 发出 post 请求。答案结束我附上结果。

Server.js

const taskController = require("./controllers/registration");
const express = require('express')
const parser = require('body-parser');
const app = express()
const router = express.Router();

app.use(parser.urlencoded({extended:false}));
app.use(parser.json());

app.use("/api", router);
// Here Change your router 
router.post("/register", taskController.register);

var server = app.listen(3000);

controllers/registration

exports.register = function(req, res){

    // console.log (req.body)
    console.log(req.body)

    // existing console.log
    console.log(req.body.fName);
    console.log(req.body.lName);
    console.log(req.body.id);
    res.send("Registering");
};

用户 curl 发出 post 请求 1.不带参数

curl -d '{}' -H "Content-Type: application/json" -X POST http://localhost:3000/api/register

// 控制台输出

{}
undefined
undefined
undefined

带参数 // fName : T, lName : Black, id : 1234

curl -d '{"fName":"T", "lName":"Black", "id" : 1234}' -H "Content-Type: application/json" -X POST http://localhost:3000/api/register

// 控制台输出

{ fName: 'T', lName: 'Black', id: 1234 }
T
Black
1234

这可能对你有帮助:)

Node.js 在控制台打印回未定义的属性

Node.js printing back undefined for properties in console

javascript

routing

node.js

express

body-parser