'GET responder.
Captures `req`, `resp`, and `kwargs`. Also sets up a sample response.
Args:
req: Falcon ``Request`` instance.
resp: Falcon ``Response`` instance.
kwargs: URI template *name=value* pairs, if any, along with
any extra args injected by middleware.'

def on_get(self, req, resp, **kwargs):

    (self.req, self.resp, self.kwargs) = (req, resp, kwargs)
    self.called = True
    resp.status = falcon.HTTP_200
    resp.body = self.sample_body
    resp.set_headers(self.resp_headers)
