Flutter web - Upload Image File to Firebase Storage

Question

On flutter web, I pick an image file from the computer and get a File image object. Then I want to upload it to Firebase Storage. For Android and iOS versions of the app I was using a Firebase Cloud Function and an http multipart request. It worked, but for the web version of the app it doesn't. So,

How can I upload an html image file to Firebase Storage, either directly or through a Cloud Function?

Answer 1

Finally I managed to find a solution to this issue. To achieve this I needed to install two dependencies, firebase and universal_html. Yet difficult to find out the solution, its implementation was actually simple. Here is the code of the function I used to upload the html image file to Firebase Storage, into the "images" folder:

import 'dart:async';
import 'package:universal_html/prefer_universal/html.dart' as html;
import 'package:firebase/firebase.dart' as fb;

Future<Uri> uploadImageFile(html.File image,
      {String imageName}) async {
    fb.StorageReference storageRef = fb.storage().ref('images/$imageName');
    fb.UploadTaskSnapshot uploadTaskSnapshot = await storageRef.put(image).future;
    
    Uri imageUri = await uploadTaskSnapshot.ref.getDownloadURL();
    return imageUri;
}

I hope it helps someone with the same need as me.