req.Header.Add("Access-Control-Request-Method", "PUT")
req.Header.Add("Access-Control-Request-Headers", "Authorization, X-Keep-Desired-Replicas")
resp, err := client.Do(req)
c.Check(err, Equals, nil)
c.Check(resp.StatusCode, Equals, 200)
body, err := ioutil.ReadAll(resp.Body)
req.Header.Add("Access-Control-Request-Method", "PUT")
req.Header.Add("Access-Control-Request-Headers", "Authorization, X-Keep-Desired-Replicas")
resp, err := client.Do(req)
c.Check(err, Equals, nil)
c.Check(resp.StatusCode, Equals, 200)
body, err := ioutil.ReadAll(resp.Body)