从可调用的 https 云 function 将图像上传到 Firebase 存储

Question

I would like to upload an image into Firebase Storage from a callable https cloud function but I don't know how to do that.

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

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

admin.initializeApp();

const storageBucket = admin.storage().bucket('gs://xxxxx.appspot.com');

exports.test_upload = functions.https.onRequest(async (request, response) => {

    var base64Img = "data:image/jpeg;base64,/9j/4AAQSkZJRg...AoNDQoIC";

    let filename = new Date().getTime() + '.jpg';

    await storageRef.child('/destination/'+filename).putString(base64Img, 'data_url').then(function(snapshot) {

        snapshot.ref.getDownloadURL().then(async (url) => { 
            
            console.log(url);

        });

    });


    response.status(200).send("Done!");

});

Can you help me to understand, how to do that?

Thank you so much

UPDATE: 2020/07/22

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

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

admin.initializeApp();

const storageBucket = admin.storage().bucket('perfume-group.appspot');

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

const storage = new Storage({keyFilename: 'perfume-group-key.json'});

exports.test_upload = functions.https.onRequest(async (request, response) => {

    /// CAS 1: Don't works
    // Source: https://stackoverflow.com/questions/53969468/how-to-store-files-in-firebase-using-node-js

    const fileUrl = 'https://i.pinimg.com/originals/4a/9d/f8/4a9df83774219e0d02bbb9e5dc9be125.jpg';

    const opts = {
        destination: 'destination/file1.jpg',
        metadata: {
            contentType: 'image/jpeg'
        }
    };

    firebase.storage().bucket().upload(fileUrl, opts);

    //////////////////////////////////////////////////

    /// CASE 2: Don't works

    const bucket = storage.bucket('perfume-group.appspot.com');

    bucket.upload(fileUrl, {
        destination: 'destination/file2.jpg',
        metadata: {
            contentType: 'image/jpeg'
        }
    });

    //////////////////////////////////////////////////

    /// CASE 3: Don't works

    const options = {
      destination: 'destination/file3.jpg',
    };

    // Downloads the file
    await storage.bucket('perfume-group.appspot.com').file(fileUrl).download(options);

    //////////////////////////////////////////////////


    response.status(200).send("Done!");

});

is it possible to have examples that work?
Like this page: https://firebase.google.com/docs/storage/web/upload-files

I understood how to add data to the Database but to add files to the Storage it is not clear.

Why this explain don't works? ->https://googleapis.dev/nodejs/storage/latest/Bucket.html#upload

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

await bucket.upload('https://i.pinimg.com/originals/4a/9d/f8/4a9df83774219e0d02bbb9e5dc9be125.jpg', function(err, file, apiResponse) {
      
});

After all, my storage still empty.

Answer 1

You seem to be trying to use the Firebase JavaScript SDK for Cloud Storage inside your Cloud Functions code, which is not possible. The Firebase JavaScript SDK for Cloud Storage is only usable in web clients.

Within server-side environments, you'll need to use the Firebase Admin SDK to interact with Cloud Storage. In this case you'll end up using a pre-initialized version of the Node.js SDK for Cloud Storage .

So to learn how to upload an image in your Cloud Functions, I'd search for Node.js SDK for Cloud Storage upload file . This leads to:

• How to store files in firebase using node.js for uploading files
• Get Download URL from file uploaded with Cloud Functions for Firebase for getting a signed URL

Answer 2

Took me a while to figure it out so posting it here in case it helps others in the same boat. I am using formidable serverless to parse the request.

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

exports.uploadFile = functions.https.onRequest((req, res) => {
  var form = new formidable.IncomingForm();
  form.parse(req, async (err, fields, files) => {
    var file = files.fileToUpload;
    if (err || !file) {
      res.status(500).send(err);
      return;
    }
    var filePath = file.path;
    var filename = file.name;
    var bucket = admin.storage().bucket("nameOfBucket.appspot.com");

    const options = {
      destination: "profile/" + filename,
      contentType: "image/jpeg", //file.path
    };

    //upload image
    await bucket
      .upload(output, options)
      .catch((error) => res.status(500).send(error));
    await res.status(200).send("success");
  });
});

Html form code:

<form action="https://yourCloudFunctionsUrl.cloudfunctions.net/uploadFile" method="post" enctype="multipart/form-data">
        <input type="file" accept="image/*" name="fileToUpload" >
        <input type="submit" value="upload">
</form>