nodejs express 无法从节点服务器获取 url 和数据

Question

编写简单的应用程序从 nodejs 服务器获取数据。

但它似乎没有在浏览器以及 POSTMAN 中获取文件。 我曾多次尝试检查网址，但无济于事。

这是我的文件：

应用程序.js

const express = require('express');
const bodyParser = require('body-parser');
const router = require('./Routes/routes');

const hostname = "localhost";
const port = "8055";

const app = express();

app.use(bodyParser.json());

// CORS
 app.use((req, res, next) => {
    res.setHeader('Access-Control-Allow-Origin', '*');
    res.setHeader('Access-Control-Allow-Methods','GET,POST,PUT,PATCH,DELETE');
    res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Authorization');
    next();
    });

    app.use('/', router);
    app.listen(port,hostname, () => {
    console.log('Server is running on http://${hostname}:${port}');
    })

路由.js

    const express = require('express')

var CityListController = require('../Controllers/City')
var RestaurantCityController = require('../Controllers/Restaurants')
var MenuController = require('../Controllers/Menu')


const router = express.Router();

router.get('/getCityList',CityListController.getCityList);
router.get('/getRestaurantsByCity/:cityname', RestaurantCityController.getRestaurantsByCity);
router.get('/getMenu', MenuController.getMenu);

module.exports = router;

菜单.js

const mealtypes = require('../Models/menu.json');

exports.getMenu = (req, res) => {
const resultname = mealtypes.map(items => items.name)

res.status(200).json({
    message: "widgets data fetched successfully",
    name : resultname
 
   })
 }

menu.json是这样的

[
{
    "_id": "1",
    "name": "Breakfast",
    "content": "Start your day with exclusive breakfast options",
    "image": "assets/breakfast.png"
},
{
    "_id": "2",
    "name": "Lunch",
    "content": "Start your day with exclusive breakfast options",
    "image": "assets/lunch.png"
}
 ]

错误是无法获取 /getMenu

不确定错误在哪里，因为它是一条简单的路线..不确定缺少什么。 谢谢

Answer 1

尝试访问http://localhost:8055导致错误Cannot GET /

• 生成它是因为根目录http://localhost:8055/没有使用路径/在express中的路由。

• 这是http://localhost:8055/getMenu的路线，效果很好。

测试代码

const express = require('express');

const getMenu = (req,res) => res.status(200).json({ test_data: "test_data"});
const router = express.Router();
router.get('/getMenu', getMenu);

const hostname = "localhost";
const port = "8055";

const app = express();
app.use('/', router);
app.listen(port,hostname, () => {
    console.log(`Server is running on http://${hostname}:${port}`);
})

Answer 2

您的代码应该适用于 http://localhost:8055/getMenu。 我复制了您的代码并为我工作链接到 repo 。

{
    "message": "widgets data fetched successfully",
    "name": [
        "Breakfast",
        "Lunch"
    ]
}

Answer 3

似乎出现了技术错误。

现在工作正常。 我刚刚重新启动了 nodemon app.js。

它现在正在工作。 一直在尝试修复 url。

谢谢大家的帮助