From what I've just learned from the Gnip API user guide, it does not return a "file" (or regular response with limited length) but a potentially endless stream of data. I'm afraid this won't be easy with the built-in components in Clover at this moment (ver. 4.0.6), since Clover does not support the stream mode. For more information about the HTTPConnector stream mode in Clover refer to the following ticket: https://bug.javlin.eu/browse/CLO-6590
Hope this helps.