pysolr.extract returns dict with empty values for contents and metadata

[khsater]

Using pysolr 3.10.0 with Solr 9.8.0, I'm getting empty values for the values 'contents' and 'metadata'. This is because Solr returns values for 'file' and 'file_metadata' instead of the aforementioned keys.

with open(file_path, 'rb') as temp_file:
            response = solr.extract(file_obj = temp_file,extractOnly=True)