using google firebase storage without authentication

Question

I want to share some json file to all user without server and I use google firebase storage service (without user authentication). Code:

FirebaseStorage storage = FirebaseStorage.getInstance();
StorageReference storageRef = storage.getReferenceFromUrl("gs://xxxxxx.appspot.com/xxx-main.json");
Task<byte[]> task = storageRef.getBytes(1000000);
while (!task.isComplete())
    StaticTools.sleep(100);

byte[] b=task.getResult();

but it raise an exception:

com.google.android.gms.tasks.RuntimeExecutionException: com.google.firebase.storage.StorageException: User does not have permission to access this object.

Storage Rule:

service firebase.storage {
  match /b/XXXXXX.appspot.com/o {
    match /{allPaths=**} {
      allow read, write;
    }
  }
}

Answer 1

Use the new Firebase Storage Console at https://console.firebase.google.com. Navigate through your folders and select your uploaded file. Under the File location tab, there is this field called Download URL. Click on it to copy and you will be able to hotlink to this file in your website.

As long as there is no permission settings written in the rules tab, you should be able to use these files publicly.

Answer 2

Xavier's answer with Download URLs will work.

Your rules should allow public read, but it can take up to 5 minutes for your rules to update across the system.

Answer 3

I Use this for the latest firebase it worked

service firebase.storage {
  match /b/{bucket}/o {
    match /{allPaths=**} {
      allow read, write;
    }
  }
}

I just delete in if condition.