Function PingV2Registry

internal/registry/auth.go:104–126

PingV2Registry attempts to ping a v2 registry and on success return a challenge manager for the supported authentication types. If a response is received but cannot be interpreted, a PingResponseError will be returned.

(endpoint *url.URL, authTransport http.RoundTripper)

// challenge manager for the supported authentication types.
// If a response is received but cannot be interpreted, a PingResponseError will be returned.
func PingV2Registry(endpoint *url.URL, authTransport http.RoundTripper) (challenge.Manager, error) {
	endpointStr := strings.TrimRight(endpoint.String(), "/") + "/v2/"
	req, err := http.NewRequest(http.MethodGet, endpointStr, http.NoBody)
	if err != nil {
		return nil, err
	}
	pingClient := &http.Client{
		Transport: authTransport,
		Timeout:   15 * time.Second,
	}
	resp, err := pingClient.Do(req)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()

	challengeManager := challenge.NewSimpleManager()
	if err := challengeManager.AddResponse(resp); err != nil {
		return nil, err
	}

	return challengeManager, nil
}