retrieving content does not scale

[richard-jones]

[Migrated from https://bitbucket.org/richardjones/python-sword2/issue/6/retrieving-content-does-not-scale]

If you do:

resource = conn.get_resource(content_iri=receipt.cont_iri)

Where receipt is some deposit receipt from a previous deposit. The value or receipt.content is a string containing the response; this won't scale in the event that the content is a large binary object. Better if we can convert this into a file handle, either reading directly from the http stream, or from a temp file.