Unable to delete Firebase Storage Image with Cloud Function

Question

Changed Storage path from "yourmaps" to "users" for this question Attempting to delete an image from Firebase Storage. I have read similar stack overflow questions and attempted to solve this for days without effort.

const functions = require('firebase-functions');
const admin = require('firebase-admin');
const {Storage} = require('@google-cloud/storage');
admin.initializeApp();

A user uuid is passed to the cloud function when a users account has been deleted. i am attempting to delete the user image which has the same uuid in firebase Storage.

exports.storageImageDelete = functions.firestore
    .document('user/{userId}')
    .onDelete(async (snapshot, context) => {

      const userId = context.params.userId
      const path = `users/${userId}.jpg`;
      const bucketName = 'xxxxxxx.appspot.com/'
      const storage = new Storage();

      return storage.bucket(bucketName).file(path).delete()
        .then(function () {
          console.log(`File deleted successfully in path: ${path}`)
        })
        .catch(function (error) {
          console.error(storage.bucket(bucketName).file(path).delete())
          console.info(storage.bucket(bucketName).file(path).delete())
          console.log(`File NOT deleted: ${path}`)
        })
      });

Error message in Firebase Storage Log. Path is correct however there is no object...

Error: No such object: xxxxxx.appspot.com/users/XXXXXXXXXX-XXXX-XXXX-XXXXXXXXXXX.jpg

In Firebase Storage "Monitor rules" i can see that my attempts are allowed. Any help would be appreciated. What am i missing?

Answer 1

Since it is your default bucket, the following should do the trick (untested):

Version with then (not using async/await)

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

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

exports.storageImageDelete = functions.firestore
    .document('user/{userId}')
    .onDelete((snapshot, context) => {

      const userId = context.params.userId
      const path = `users/${userId}.jpg`;

      const bucket = admin.storage().bucket();
      
      return bucket.file(path).delete()
        .then(() => {
          console.log(`File deleted successfully in path: ${path}`)
          return null;
        })
        .catch(error => {
          console.log(`File NOT deleted: ${path}`);
          return null;
        })
      });

Version using async / await

exports.storageImageDelete = functions.firestore
.document('user/{userId}')
.onDelete(async (snapshot, context) => {
    
    try {
        const userId = context.params.userId
        const path = `users/${userId}.jpg`;
      
        const bucket = admin.storage().bucket();
        
        await bucket.file(path).delete();
        
        console.log(`File deleted successfully in path: ${path}`)
        return null;
        
    } catch (error) {
        console.log(`File NOT deleted: ${path}`);
        console.log(error);
        return null;
    }
    
  });

In other words, no need to declare the bucket as you do, you can directly declare it with admin.storage().bucket() .

Answer 2

I finally solved my issue. Here is the missing code that was required to correctly find my bucket.

admin.initializeApp({
  databaseURL: "https://xxxxxxxx.firebaseio.com",
  storageBucket: "xxxxxxxx.appspot.com"
});