尝试连接到本地主机时连接被拒绝

Question

我开始了我在 IT 世界的旅程，从自定义 Url Shortner 服务构建 API 并使用 mongodb Atlas。

我一直在学习本教程以了解更多信息，但每次我发送请求时都会收到此错误：

'POST http://localhost:5000/api/url/shorten

org.apache.http.conn.HttpHostConnectException：连接到本地主机：5000 [localhost/127.0.0.1] 失败：连接被拒绝：连接'

这里是这样的：

index.js

const express = require('express');
const connectDB = require('./config/db');

const app = express();

// Connect to database
connectDB();

app.use(express.json({ extented: false}));

// Define Routes
app.use('/', require('./routes/index'));
app.use('/api/url', require('./routes/url'));

const PORT = 5000;

app.listen(PORT, () => console.log(`Server running on port ${PORT}`));

`

package.json

{
  "name": "url_shortner_service",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "node index",
    "dev": "nodemon index"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "config": "^3.3.9",
    "express": "^4.18.2",
    "mongoose": "^7.0.1",
    "shortid": "^2.2.16",
    "valid-url": "^1.0.9"
  },
  "devDependencies": {
    "nodemon": "^2.0.21"
  }
} 
`

溃败\

url.js

{
  "name": "url_shortner_service",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "node index",
    "dev": "nodemon index"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "config": "^3.3.9",
    "express": "^4.18.2",
    "mongoose": "^7.0.1",
    "shortid": "^2.2.16",
    "valid-url": "^1.0.9"
  },
  "devDependencies": {
    "nodemon": "^2.0.21"
  }
}
`

index.js

`    const express = require('express');
    const router = express.Router();

    module.exports = router;

`

要求\

api.http

POST http://localhost:5000/api/url/shorten
Accept: application/json

  {
  "longUrl": "https://stackoverflow.com/questions/48419801/org-apache-http-conn-httphostconnectexception-connect-to-localhost19538-local"
  }

模型\

  const mongoose = require('mongoose');

    const urlSchema = new mongoose.Schema({
        urlCode: String,
        longUrl: String,
        shortUrl: String,
        date: { type: String, default: Date.now}
    });

    module.exports = mongoose.model('Url', urlSchema);

配置
默认.json

{
   "mongoURI": "mongodb+srv://apishort:<apishort>@cluster0.30vcjuk.mongodb.net/?retryWrites=true&w=majority",
    "baseUrl": "http://localhost:5000"
}`

db.js

const mongoose = require('mongoose');
const config = require('config');
const db = config.get('mongoURI');

const connectDB = async () => {
    try {
        await mongoose.connect(db,
            {
                useNewUrlParser: true
            });

        console.log('MongoDB Connected...');
    } catch (err) {
        console.error(err.message);
        process.exit(1);
    }
};

module.exports = connectDB;

我很确定它超级容易修复，但因为我是新手，我整天都在努力寻找解决方案，但就是找不到。

有人能帮忙吗？

教程中使用了 REST Client 插件。我试图在intellij中安装它但出现错误：

"Plugin "RESTClient" version was marked as incompatible."

也许这就是为什么 api.http 是红色的

所以我不知道是否有其他插件或其他方式来使用它并使其工作。