How can i resume uploads?

[Babakinha]

I was trying out the upload_resumable feature, uploading videos with the youtube api, but it doesnt seem to have any clear way to use it? or to make it work.

I was looking at this part of the documentation

    /// Called during resumable uploads to provide a URL for the impending upload.
    /// It was saved after a previous call to `store_upload_url(...)`, and if not None,
    /// will be used instead of asking the server for a new upload URL.
    /// This is useful in case a previous resumable upload was aborted/canceled, but should now
    /// be resumed.
    /// The returned URL will be used exactly once - if it fails again and the delegate allows
    /// to retry, we will ask the server for a new upload URL.
    fn upload_url(&mut self) -> Option<String>

    /// Called after we have retrieved a new upload URL for a resumable upload to store it
    /// in case we fail or cancel. That way, we can attempt to resume the upload later,
    /// see `upload_url()`.
    /// It will also be called with None after a successful upload, which allows the delegate
    /// to forget the URL. That way, we will not attempt to resume an upload that has already
    /// finished.
    fn store_upload_url(&mut self, url: Option<&str>)

    /// Called before the given chunk is uploaded to the server.
    /// If true is returned, the upload will be interrupted.
    /// However, it may be resumable if you stored the upload URL in a previous call
    /// to `store_upload_url()`
    fn cancel_chunk_upload(&mut self, chunk: &ContentRange) -> bool

ive created a Delegate and have triggered for it to cancel with cancel_chunk_upload. i have been able to store the upload url with the store_upload_url and return it in upload_url. But it doesnt seem to do anything?

Upon looking a bit in the source code it seems that the upload_url method that it says it uses to resume the upload is not even called. and store_upload_url is never called with the value of None

Is there another way to trigger resuming the upload that im missing? was this never fully implemented?

[Byron]

It definitely worked once as it was made for the youtube API, and the CLI code for the YouTube API would have the code that uses the API with resumable uploads. Probably that's a place to look.
Of course, it may be that over time the feature broke, after all there are no tests for it.