Abp Angular FileUpload with upload progress

Question

There are good community articles out there that explain how to build the Back-End side of a file uploader. The gist of it is:

public async Task<string> UploadFile(IRemoteStreamContent file)
{
    // Save the file to Azure and get the file name
    return fileName;
}

But nothing seems to explain how to do file upload progress using the RestService in angular.

Can you please direct me to such a solution?