I'm trying to understand how to upload files in Firebase Storage, using Node.js. My first try was to use the Firebase library:

"use strict";



var firebase = require('firebase');



var config = {

    apiKey: "AIz...kBY",

    authDomain: "em....firebaseapp.com",

    databaseURL: "https://em....firebaseio.com",

    storageBucket: "em....appspot.com",

    messagingSenderId: "95...6"

};



firebase.initializeApp(config);



// Error: firebase.storage is undefined, so not a function

var storageRef = firebase.storage().ref();



var uploadTask = storageRef.child('images/octofez.png').put(file);



// Register three observers:

// 1. 'state_changed' observer, called any time the state changes

// 2. Error observer, called on failure

// 3. Completion observer, called on successful completion

uploadTask.on('state_changed', function(snapshot){

    ...

}, function(error) {

    console.error("Something nasty happened", error);

}, function() {

  var downloadURL = uploadTask.snapshot.downloadURL;

  console.log("Done. Enjoy.", downloadURL);

});

But it turns out that Firebase cannot upload files from the server side, as it clearly states in the docs:

Firebase Storage is not included in the server side Firebase npm module. Instead, you can use the gcloud Node.js client.

$ npm install --save gcloud

In your code, you can access your Storage bucket using:

var gcloud = require('gcloud')({ ... }); var gcs = gcloud.storage();

var bucket = gcs.bucket('<your-firebase-storage-bucket>');

• Can we use gcloud without having an account on Google Cloud Platform? How?

  
  



• If not, how come that uploading files to Firebase Storage from the client side is possible?

  
  



• Can't we just create a library that makes the same requests from the server side?

  
  



• How is Firebase Storage connected with Google Cloud Platform at all? Why Firebase allows us to upload images only from the client side?

  
  

My second try was to use the gcloud library, like mentioned in the docs:

var gcloud = require("gcloud");



// The following environment variables are set by app.yaml when running on GAE,

// but will need to be manually set when running locally.

// The storage client is used to communicate with Google Cloud Storage

var storage = gcloud.storage({

  projectId: "em...",

  keyFilename: 'auth.json'

});



storage.createBucket('octocats', function(err, bucket) {



    // Error: 403, accountDisabled

    // The account for the specified project has been disabled.



    // Create a new blob in the bucket and upload the file data.

    var blob = bucket.file("octofez.png");

    var blobStream = blob.createWriteStream();



    blobStream.on('error', function (err) {

        console.error(err);

    });



    blobStream.on('finish', function () {

        var publicUrl = `https://storage.googleapis.com/${bucket.name}/${blob.name}`;

        console.log(publicUrl);

    });



    fs.createReadStream("octofez.png").pipe(blobStream);

});