rxFire's storage `fromTask` can cancel uploads unexpectedly

[jhuleatt]

• Firebase SDK version: rxFire, latest
• Firebase Product: storage

rxfire/storage's fromTask cancels uploads unexpectedly

expected behavior

using pipe(first()) or pipe(take(1)) on the fromTask observable lets me get the initial snapshot returned from the Storage upload task, but doesn't affect the upload itself.

actual behavior

using pipe(first()) or pipe(take(1)) on the fromTask cancels the UploadTask in its unsubscribe. This is problematic when using take or first on the observable, which automatically call the unsubscribe and therefore cancel the upload.

[jhuleatt]

cc @jamesdaniels @davideast

[SaliZumberi]

Any updates on this?

[jamesdaniels]

Addressing in FirebaseExtended/rxfire#8