我想为Firebase创建多个云功能,并从一个项目同时部署它们。我还想将每个函数分离到一个单独的文件中。目前,我可以创建多个函数,如果我把它们都放在index.js,如:

exports.foo = functions.database.ref('/foo').onWrite(event => {
    ...
});

exports.bar = functions.database.ref('/bar').onWrite(event => {
    ...
});

然而,我想把foo和酒吧在单独的文件。我试了一下:

/functions
|--index.js (blank)
|--foo.js
|--bar.js
|--package.json

foo.js在哪里

exports.foo = functions.database.ref('/foo').onWrite(event => {
    ...
});

bar.js是

exports.bar = functions.database.ref('/bar').onWrite(event => {
    ...
});

有没有一种方法可以在不把所有函数都放在index.js中的情况下实现这一点?


当前回答

这种格式允许您的入口点查找其他函数文件,并自动导出每个文件中的每个函数。

主要入口脚本

找到functions文件夹中的所有.js文件,并导出从每个文件中导出的每个函数。

const fs = require('fs'); const path = require('path'); // Folder where all your individual Cloud Functions files are located. const FUNCTIONS_FOLDER = './scFunctions'; fs.readdirSync(path.resolve(__dirname, FUNCTIONS_FOLDER)).forEach(file => { // list files in the folder. if(file.endsWith('.js')) { const fileBaseName = file.slice(0, -3); // Remove the '.js' extension const thisFunction = require(`${FUNCTIONS_FOLDER}/${fileBaseName}`); for(var i in thisFunction) { exports[i] = thisFunction[i]; } } });

从一个文件导出多个函数

Const functions = require('firebase-functions'); Const query = functions.https。onRequest((req, res) => { Let query = req.query.q; res.send ({ “You searching For”:查询 }); }); const searchTest = functions.https。onRequest((req, res) => { res.send ({ "searchTest": "你好!" }); }); 模块。出口= { 查询 searchTest }

HTTP可访问端点有适当的命名

✔功能:查询:http://localhost:5001/PROJECT-NAME/us-central1/query function: helloWorlds: http://localhost:5001/PROJECT-NAME/us-central1/helloWorlds ✔功能:searchTest: http://localhost:5001/PROJECT-NAME/us-central1/searchTest

一个文件

如果你只有几个额外的文件(例如只有一个),你可以使用:

Const your_functions = require('./path_to_your_functions'); For (var I in your_functions) { export [i] = your_functions[i]; }

其他回答

我也在为云函数寻找最佳的文件夹结构,所以我决定分享我的想法:

+  /src
|    - index.ts
|    + /events
|    |    - moduleA_events.ts
|    |    - moduleB_events.ts
|    + /service
|    |    - moduleA_services.ts
|    |    - moduleB_services.ts
|    + /model
|    |    - objectA.ts
|    |    - objectB.ts
|    |    - objectC.ts

/ src /索引。Ts此文件作为应用程序中所有可用事件(函数)的入口点,如数据库事件,HTTPS请求,计划函数。然而,函数不是直接在index.js中声明的,而是在事件文件夹indead中声明的。代码示例: 出口。user = require("./events/userEvents") 出口。order = require("./events/orderEvents") 出口。product = require("./events/productEvents")

注意:根据GCF官方文档,这种方法会自动将所有函数重命名为“模块-函数”模式。示例:如果在userEvents中有"userCreated"函数。ts, firebase将重命名此函数为"user-userCreated"

/src/events this folder should only contain cloud functions declarations and should not handle business logic directly. For the actual business, you should call custom functions from your /service folder (which maps the same modules as in the events folder). Code sample for userEvents.ts: exports.userCreated = functions.firestore.document("/users/{documentId}").onCreate(async (snapshot) => { userServices.sendWelcomeEmail() } /src/service the actual busienss logic that will connect with other firebase services such as firestore, storage, auth. You can also import your /model layer here (typescript only). /src/model the interfaces used in typescript to ensure strong typed functions and objects.

正如您所注意到的,这种方法主要基于MVC和OOP原则。有很多关于我们是否应该在无服务器环境中使用函数式编程的争论。由于我的后台背景是Java和c#,我在这里介绍的文件夹结构对我来说似乎更自然,然而,我很想知道当转向函数式编程方法时,这种文件夹结构会有什么不同。

Node 8 LTS现在可以与Cloud/Firebase函数一起使用,您可以使用扩展操作符执行以下操作:

/ package.json

"engines": {
  "node": "8"
},

/ index.js

const functions = require("firebase-functions");
const admin = require("firebase-admin");
admin.initializeApp();

module.exports = {
  ...require("./lib/foo.js"),
  // ...require("./lib/bar.js") // add as many as you like
};

/lib/foo.js

const functions = require("firebase-functions");
const admin = require("firebase-admin");

exports.fooHandler = functions.database
  .ref("/food/{id}")
  .onCreate((snap, context) => {
    let id = context.params["id"];

    return admin
      .database()
      .ref(`/bar/${id}`)
      .set(true);
  });

我使用一个普通的JS引导加载器来自动包含我想使用的所有函数。

├── /functions
│   ├── /test/
│   │   ├── testA.js
│   │   └── testB.js
│   ├── index.js
│   └── package.json

index.js(引导)

/**
 * The bootloader reads all directories (single level, NOT recursively)
 * to include all known functions.
 */
const functions = require('firebase-functions');
const fs = require('fs')
const path = require('path')

fs.readdirSync(process.cwd()).forEach(location => {
  if (!location.startsWith('.')) {
    location = path.resolve(location)

    if (fs.statSync(location).isDirectory() && path.dirname(location).toLowerCase() !== 'node_modules') {
      fs.readdirSync(location).forEach(filepath => {
        filepath = path.join(location, filepath)

        if (fs.statSync(filepath).isFile() && path.extname(filepath).toLowerCase() === '.js') {
          Object.assign(exports, require(filepath))
        }
      })
    }
  }
})

这个例子index.js文件只在根目录中自动包含目录。它可以扩展到walk目录,honor .gitignore等。不过这对我来说已经足够了。

有了索引文件,添加新函数就很简单了。

/测试/ testA.js

const functions = require('firebase-functions');

exports.helloWorld = functions.https.onRequest((request, response) => {
 response.send("Hello from Firebase!");
});

/测试/ testB.js

const functions = require('firebase-functions');

exports.helloWorld2 = functions.https.onRequest((request, response) => {
 response.send("Hello again, from Firebase!");
});

NPM运行服务产生:

λ ~/Workspace/Ventures/Author.io/Firebase/functions/ npm run serve

> functions@ serve /Users/cbutler/Workspace/Ventures/Author.io/Firebase/functions
> firebase serve --only functions


=== Serving from '/Users/cbutler/Workspace/Ventures/Author.io/Firebase'...

i  functions: Preparing to emulate functions.
Warning: You're using Node.js v9.3.0 but Google Cloud Functions only supports v6.11.5.
✔  functions: helloWorld: http://localhost:5000/authorio-ecorventures/us-central1/helloWorld
✔  functions: helloWorld2: http://localhost:5000/authorio-ecorventures/us-central1/helloWorld2

这个工作流程基本上就是“编写并运行”,而不必在每次添加/修改/删除新函数/文件时修改index.js文件。

更新:Typescript现在完全支持,所以不需要下面的恶作剧。只需使用firebase cli


以下是我个人是如何使用typescript的:

/functions
   |--src
      |--index.ts
      |--http-functions.ts
      |--main.js
      |--db.ts
   |--package.json
   |--tsconfig.json

在此之前,我先提出两点警告:

进口/出口的顺序在index.ts中很重要 db必须是一个单独的文件

第二点,我不知道为什么。其次,你应该完全尊重我的index, main和db的配置(至少要尝试一下)。

索引。Ts:与出口有关。我觉得让索引更干净。贸易部门负责出口。

// main must be before functions
export * from './main';
export * from "./http-functions";

主要。ts:处理初始化。

import { config } from 'firebase-functions';
import { initializeApp } from 'firebase-admin';

initializeApp(config().firebase);
export * from "firebase-functions";

db。Ts:只是重新导出数据库,所以它的名字比database()短。

import { database } from "firebase-admin";

export const db = database();

http-functions.ts

// db must be imported like this
import { db } from './db';
// you can now import everything from index. 
import { https } from './index';  
// or (both work)
// import { https } from 'firebase-functions';

export let newComment = https.onRequest(createComment);

export async function createComment(req: any, res: any){
    db.ref('comments').push(req.body.comment);
    res.send(req.body.comment);
}

我花了很多时间寻找同样的东西,我认为这是实现它的最佳方法(我使用firebase@7.3.0):

https://codeburst.io/organizing-your-firebase-cloud-functions-67dc17b3b0da

毫不费力;)