将文件从Firebase Cloud Functions上传到Cloud Storage [英] Uploading files from Firebase Cloud Functions to Cloud Storage

问题描述

文档对于我来说太复杂了.它显示了如何将文件从Cloud Storage下载到Cloud Functions，如何处理文件，然后将新文件上传到Cloud Storage.我只是想了解有关将文件从Cloud Functions上载到Cloud Storage的基本，最低限度的说明.为什么这样行不通:

The documentation is too complex for me to understand. It shows how to download a file from Cloud Storage to Cloud Functions, manipulate the file, and then upload the new file to Cloud Storage. I just want to see the basic, minimum instructions for uploading a file from Cloud Functions to Cloud Storage. Why doesn't this work:

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

admin.initializeApp();

exports.storage = functions.firestore.document('Test_Value').onUpdate((change, context) => {

  var metadata = {
    contentType: 'text',
  };

  admin.storage().ref().put( {'test': 'test'}, metadata)
  .then(function() {
    console.log("Document written.");
  })
  .catch(function(error) {
    console.error(error);
  })

});

错误消息是admin.storage(...).ref is not a function.我猜想firebase-admin包括Firestore但不包括Storage?我应该使用@google-cloud/storage代替firebase-admin吗?为什么这样行不通:

The error message is admin.storage(...).ref is not a function. I'm guessing that firebase-admin includes Firestore but not Storage? Instead of firebase-admin should I use @google-cloud/storage? Why doesn't this work:

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

const {Storage} = require('@google-cloud/storage')();
const storage = new Storage();

admin.initializeApp();

exports.storage = functions.firestore.document('Test_Value').onUpdate((change, context) => {

  storage.bucket().upload( {'test': 'test'} , {
    metadata: {
      contentType: 'text'
    }
  })

});

我什至无法部署此代码，错误消息是

I can't even deploy this code, the error message is

Error parsing triggers: Cannot find module './clone.js'

显然缺少npm模块依赖项?但是该模块不称为clone.js吗?我试过要求child-process-promise，path，os和fs；没有一个可以解决丢失的clone.js错误.

Apparently a npm module dependency is missing? But the module isn't called clone.js? I tried requiring child-process-promise, path, os, and fs; none fixed the missing clone.js error.

为什么admin.initializeApp();缺少参数，而在我的index.html文件中却有:

Why does admin.initializeApp(); lack parameters, when in my index.html file I have:

firebase.initializeApp({
    apiKey: 'swordfish',
    authDomain: 'myapp.firebaseapp.com',
    databaseURL: "https://myapp.firebaseio.com",
    projectId: 'myapp',
    storageBucket: "myapp.appspot.com"
  });

我看到的另一个问题:

npm list -g --depth=0       

/Users/TDK/.nvm/versions/node/v6.11.2/lib
├── child_process@1.0.2
├── UNMET PEER DEPENDENCY  error: ENOENT: no such file or directory, open '/Users/TDK/.nvm/versions/node/v6.11.2/lib/node_modules/firebase-admin/package.json
├── firebase-functions@2.1.0
├── firebase-tools@6.0.1
├── firestore-backup-restore@1.3.1
├── fs@0.0.2
├── npm@6.4.1
├── npm-check@5.9.0
├── protractor@5.4.1
├── request@2.88.0
└── watson-developer-cloud@3.13.0

换句话说，firebase-admin或Node 6.11.2出了点问题.我应该使用节点版本管理器还原到旧版本的节点吗?

In other words, there's something wrong with firebase-admin, or with Node 6.11.2. Should I use a Node Version Manager to revert to an older version of Node?

推荐答案

我通过Google Cloud Functions将文件从硬盘驱动器上传到Firebase Cloud Storage.首先，我找到了Google Cloud Functions的文档 bucket.upload .

I uploaded a file from my hard drive to Firebase Cloud Storage via Google Cloud Functions. First, I found the documentation for Google Cloud Functions bucket.upload.

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

exports.Storage = functions.firestore.document('Storage_Value').onUpdate((change, context) => {

  const {Storage} = require('@google-cloud/storage');
  const storage = new Storage();
  const bucket = storage.bucket('myapp.appspot.com');

  const options = {
    destination: 'Test_Folder/hello_world.dog'
  };

  bucket.upload('hello_world.ogg', options).then(function(data) {
    const file = data[0];
  });

  return 0;
});

前三行是Cloud Functions样板.下一行

The first three lines are Cloud Functions boilerplate. The next line

exports.Storage = functions.firestore.document('Storage_Value').onUpdate((change, context) => {

创建云功能并设置触发器.接下来的三行是Google Cloud的样板.

creates the Cloud Function and sets the trigger. The next three lines are more Google Cloud boilerplate.

其余代码在我的项目目录的functions文件夹中的计算机硬盘驱动器上找到文件hello_world.ogg，并将其上载到目录Test_Folder中，并将文件名更改为hello_world.dog我的Firebase云存储.这将返回一个承诺，并且除非要对文件进行其他操作，否则下一行const file = data[0];是不必要的.

The rest of the code locates the file hello_world.ogg on my computer's hard drive in the functions folder of my project directory and uploads it to the directory Test_Folder and changes the name of the file to hello_world.dog in my Firebase Cloud Storage. This returns a promise, and the next line const file = data[0]; is unnecessary unless you want to do something else with the file.

最后我们return 0;.该行除了防止出现错误消息外没有任何作用

Lastly we return 0;. This line does nothing except prevent the error message

Function returned undefined, expected Promise or Value

这篇关于将文件从Firebase Cloud Functions上传到Cloud Storage的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！