Google Cloud Functions, Node JS 8.9.x (LTS) and KOA library

问题

How can I use Koa library, the express replacement, in Cloud Functions?

I know KOA use all great ES2017 and make more use of Async use of JavaScript.

or it might not be needed at all working with Cloud Functions because the Firebase system won't send multiple calls to the same Cloud Function until it ends the previous one?

it unclear to me.

it know demands Node 8.x and I know the NodeJs 8.9.x, has now LTS.

回答1:

Reading from cloud functions doc:

Base Image Cloud Functions uses a Debian-based execution environment and includes contents of the gcr.io/google-appengine/nodejs Docker image, with the Node.js runtime installed in the version, specified above:

FROM gcr.io/google-appengine/nodejs
RUN install_node v6.14.0

To see what is included in the image, you can check its GitHub project, or pull and inspect the image itself. Updates to the language runtime (Node.js) are generally done automatically (unless otherwise notified), and include any changes in the definition of the base image.

And I saw a pull request back in November 2017, adding Nodejs v8. Here's hoping it can finally land in Google Cloud Functions 🤞🏻

UPDATE: Google Cloud Functions now support Node.js 8 and even Python!

回答2:

Referring to the release notes from Google... Cloud Functions Release Notes

Node version supported is still at v6, same for firebase. You need to wait awhile before they release it in v8. Am pretty sure they will move to v8 when v6 no longer supported, but hopefully earlier...

回答3:

Use babel:

index.js:
----------=

'use strict';

require('@babel/register')
require('babel-polyfill')
const http = require('http')

const createApp = require('./app/app.js')
const handle = createApp().callback()

if (process.env.IS_LOCAL_DEPLOYMENT) {
    // to use same code in local server
    http.createServer(handle).listen(3000)
} else {
    module.exports.http = (request, response) => {
        handle(request, response)
    };
}

app.js:
--------

'use strict';

const Koa = require('koa')

module.exports = () => {
    const app = new Koa()

    app.use(......)

    return app
}

package.json
------------

  "scripts": {
       .
       .
    "start": "export IS_LOCAL_DEPLOYMENT=true && node index"
       .
       .
  }

回答4:

I just saw in Cloud Functions Console editor for one of my functions that Node 8 is now a runtime option. See screenshot:

来源：https://stackoverflow.com/questions/47712018/google-cloud-functions-node-js-8-9-x-lts-and-koa-library

标签

node.js

firebase

google-cloud-functions

koa