无法在 firebase 函数模拟器上提供 express 应用程序 | EADDRINUSE：地址已在使用中：：：：3000

Question

我正在使用 firebase 函数在 firebase 上测试快速应用程序部署。但是在使用命令firebase serve之后。我得到 EADDRINUSE: address already in use :::3000。这是我的 index.js

const functions = require('firebase-functions');
const express = require('express');
const validator = require('email-validator');
const PORT = 3000;
const app = express();

/* JSON body parse*/
const bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());

app.get('/hello', (req, res, next) => {
  console.info('/hello call success ');
  res.send('Welcome to Firebase Cloud Functions');
});

app.post('/emailValidate', async (req, res, next) => {
  const postData = req.body;
  if (postData.email) {
    console.info('/emailValidate call success ');
    res.json({ 'status': validator.validate(postData.email) });
  } else {
    console.warn('/emailValidate wrong input ');
    res.status(500).json({ 'status': 'wrong input' });
  }
});


app.listen(PORT, () => {
  console.info('Server is running on PORT:', PORT);
});

exports.app = functions.https.onRequest(app);

package.json

{
  "name": "functions",
  "description": "Cloud Functions for Firebase",
  "scripts": {
    "serve": "firebase emulators:start --only functions",
    "shell": "firebase functions:shell",
    "start": "npm run shell",
    "deploy": "firebase deploy --only functions",
    "logs": "firebase functions:log"
  },
  "engines": {
    "node": "16"
  },
  "main": "index.js",
  "dependencies": {
    "body-parser": "^1.19.1",
    "email-validator": "^2.0.4",
    "express": "^4.17.2",
    "firebase-admin": "^9.8.0",
    "firebase-functions": "^3.14.1"
  },
  "devDependencies": {
    "firebase-functions-test": "^0.2.0"
  },
  "private": true
}

打开时出错 URL functions[us-central1-app]: http function initialized (http://localhost:5001/{app-name}/us-central1/app).

 node:events:368
>        throw er; // Unhandled 'error' event
>        ^
>
>  Error: listen EADDRINUSE: address already in use :::3000
>      at Server.setupListenHandle [as _listen2] (node:net:1334:16)
>      at listenInCluster (node:net:1382:12)
>      at Server.listen (node:net:1469:7)
>      at Function.listen (\home\development\express-firebase\functions\node_modules\express\lib\application.js:618:24)
>      at Object.<anonymous> (D:[=12=]2_Research_Development\Web\development\express-firebase\functions\index.js:29:5)
>      at Module._compile (node:internal/modules/cjs/loader:1101:14)
>      at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
>      at Module.load (node:internal/modules/cjs/loader:981:32)
>      at Function.Module._load (node:internal/modules/cjs/loader:822:12)
>      at Module.require (node:internal/modules/cjs/loader:1005:19)
>  Emitted 'error' event on Server instance at:
>      at emitErrorNT (node:net:1361:8)
>      at processTicksAndRejections (node:internal/process/task_queues:83:21) {
>    code: 'EADDRINUSE',
>    errno: -4091,
>    syscall: 'listen',
>    address: '::',
>    port: 3000
>  }

此外，我已经检查过在定义的端口上已经没有任何东西运行。甚至尝试更改 index.js 中的端口号，但问题仍然存在。

如有任何帮助，我们将不胜感激。 :)

Answer 1

另一个应用程序正在使用端口 3000，您需要停止该应用程序and/or 终止端口，具体取决于您的操作系统。

无法在 firebase 函数模拟器上提供 express 应用程序 | EADDRINUSE：地址已在使用中：：：：3000

Can't serve express app on firebase functions emulator | EADDRINUSE: address already in use :::3000

javascript

node.js

express

firebase

google-cloud-functions