func Login()

in cmd/network.go [53:102]
44 lines of code
8 McCabe index (conditional complexity)

func Login(r *Request) (string, error) {
	params := make(url.Values)
	params.Add("command", "login")
	params.Add("username", r.Config.ActiveProfile.Username)
	params.Add("password", r.Config.ActiveProfile.Password)
	params.Add("domain", r.Config.ActiveProfile.Domain)
	params.Add("response", "json")

	msURL, _ := url.Parse(r.Config.ActiveProfile.URL)
	if sessionCookie := findSessionCookie(r.Client().Jar.Cookies(msURL)); sessionCookie != nil {
		return sessionCookie.Value, nil
	}

	config.Debug("Login POST URL:", msURL, params)
	spinner := r.Config.StartSpinner("trying to log in...")
	resp, err := r.Client().PostForm(msURL.String(), params)
	r.Config.StopSpinner(spinner)

	if err != nil {
		return "", errors.New("failed to authenticate with the CloudStack server, please check the settings: " + err.Error())
	}

	config.Debug("Login POST response status code:", resp.StatusCode)
	if resp.StatusCode != http.StatusOK {
		e := errors.New("failed to authenticate, please check the credentials")
		if err != nil {
			e = errors.New("failed to authenticate due to " + err.Error())
		}
		return "", e
	}

	var sessionKey string
	curTime := time.Now()
	expiryDuration := 15 * time.Minute
	for _, cookie := range resp.Cookies() {
		if cookie.Expires.After(curTime) {
			expiryDuration = cookie.Expires.Sub(curTime)
		}
		if cookie.Name == "sessionkey" {
			sessionKey = cookie.Value
		}
	}
	go func() {
		time.Sleep(expiryDuration)
		r.Client().Jar, _ = cookiejar.New(nil)
	}()

	config.Debug("Login sessionkey:", sessionKey)
	return sessionKey, nil
}