无法读取 Firebase 函数中未定义错误的属性 https

Question

我正在关注这个youtube firebase official tutorial on cloud functions 进行服务器端反应渲染。

（顺便说一下，我按照视频的确切目录结构。）

但每当我尝试提供它时都会出错：

i  functions: Preparing to emulate functions.
⚠  hosting: Port 5000 is not available. Trying another port...
i  hosting: Serving hosting files from: dev
✔  hosting: Local server: http://localhost:5004

⚠  functions: Failed to load functions source code. Ensure that you have the latest SDK by running npm i --save firebase-functions inside the functions directory.
⚠  functions: Error from emulator. Error occurred while parsing your function triggers.

TypeError: Cannot read property 'https' of undefined
    at Object.<anonymous> (/Users/mac/Documents/React-Projects/React-js/Cards/functions/index.js:35:54)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at /Users/mac/.nvm/versions/node/v6.11.5/lib/node_modules/firebase-tools/lib/triggerParser.js:21:11
    at Object.<anonymous> (/Users/mac/.nvm/versions/node/v6.11.5/lib/node_modules/firebase-tools/lib/triggerParser.js:75:3)

我已经尝试npm i --save firebase-functions，但仍然出现错误。

firebase.json：

{
  "hosting": {
    "public": "dev",
    "ignore": [
      "firebase.json",
      "**/.*",
      "**/node_modules/**"
    ],
    "rewrites":[{
      "source": "**",
      "function": "main"
    }]
  }
}

index.js 在项目文件夹的根目录中：

import React from 'react';
import { renderToString } from 'react-dom';
import express from 'express';
import Test from './src/components/Test/Test';
import functions from 'firebase-functions';

const app = express();

app.get('**', (req, res) => {
    const html = renderToString(<Test />);
    res.send(html);
});

export let main = functions.https.onRequest(app);

package.json：

{
  "name": "Cards",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "dev": "webpack --mode development",
    "start": "webpack-dev-server --open --hot --mode development",
    "build": "webpack -p --config webpack.prod.config.js",
    "babel": "babel src -d functions/src && babel index.js -d functions"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@material-ui/core": "^1.3.0",
    "@material-ui/icons": "^1.1.0",
    "firebase": "^5.2.0",
    "react": "^16.4.1",
    "react-dom": "^16.4.1"
  },
  "devDependencies": {
    "babel-cli": "^6.26.0",
    "babel-core": "^6.26.3",
    "babel-loader": "^7.1.4",
    "babel-preset-env": "^1.7.0",
    "babel-preset-react": "^6.24.1",
    "firebase-admin": "^5.12.1",
    "firebase-functions": "^1.1.0",
    "firebase-tools": "^3.19.1",
    "webpack": "^4.14.0",
    "webpack-dev-server": "^3.1.4"
  }
}

通过查看错误，它指向 index.js 文件中的functions.https.onRequest(app); 行。

我还签入了functions get started guide，它有functions.https.onRequest(...)。

那么，问题出在哪里，我该如何解决呢？

系统详情：

macOS：10.13.4

非虚拟机：0.33.11

节点：6.11.5

npm: 3.10.10

Answer 1

你应该这样做：

import * as functions from 'firebase-functions'

因为 'firebase-functions' 显然似乎没有默认导出

或者你可以这样做：

import { https } from 'firebase-functions'

但请记住添加您可能在代码中使用的任何其他函数。