Golang Digest.String方法代碼示例

// digestPathComponents provides a consistent path breakdown for a given
// digest. For a generic digest, it will be as follows:
//
// 	<algorithm>/<hex digest>
//
// Most importantly, for tarsum, the layout looks like this:
//
// 	tarsum/<version>/<digest algorithm>/<full digest>
//
// If multilevel is true, the first two bytes of the digest will separate
// groups of digest folder. It will be as follows:
//
// 	<algorithm>/<first two bytes of digest>/<full digest>
//
func digestPathComponents(dgst digest.Digest, multilevel bool) ([]string, error) {
	if err := dgst.Validate(); err != nil {
		return nil, err
	}

	algorithm := blobAlgorithmReplacer.Replace(string(dgst.Algorithm()))
	hex := dgst.Hex()
	prefix := []string{algorithm}

	var suffix []string

	if multilevel {
		suffix = append(suffix, hex[:2])
	}

	suffix = append(suffix, hex)

	if tsi, err := digest.ParseTarSum(dgst.String()); err == nil {
		// We have a tarsum!
		version := tsi.Version
		if version == "" {
			version = "v0"
		}

		prefix = []string{
			"tarsum",
			version,
			tsi.Algorithm,
		}
	}

	return append(prefix, suffix...), nil
}

func addTestFetch(repo string, dgst digest.Digest, content []byte, m *testutil.RequestResponseMap) {

	*m = append(*m, testutil.RequestResponseMapping{
		Request: testutil.Request{
			Method: "GET",
			Route:  "/v2/" + repo + "/blobs/" + dgst.String(),
		},
		Response: testutil.Response{
			StatusCode: http.StatusOK,
			Body:       content,
			Headers: http.Header(map[string][]string{
				"Content-Length": {fmt.Sprint(len(content))},
				"Last-Modified":  {time.Now().Add(-1 * time.Second).Format(time.ANSIC)},
			}),
		},
	})

	*m = append(*m, testutil.RequestResponseMapping{
		Request: testutil.Request{
			Method: "HEAD",
			Route:  "/v2/" + repo + "/blobs/" + dgst.String(),
		},
		Response: testutil.Response{
			StatusCode: http.StatusOK,
			Headers: http.Header(map[string][]string{
				"Content-Length": {fmt.Sprint(len(content))},
				"Last-Modified":  {time.Now().Add(-1 * time.Second).Format(time.ANSIC)},
			}),
		},
	})
}

// BuildBlobURL constructs the url for the blob identified by name and dgst.
func (ub *URLBuilder) BuildBlobURL(name string, dgst digest.Digest) (string, error) {
	route := ub.cloneRoute(RouteNameBlob)

	layerURL, err := route.URL("name", name, "digest", dgst.String())
	if err != nil {
		return "", err
	}

	return layerURL.String(), nil
}

func (ms *manifests) Delete(dgst digest.Digest) error {
	u, err := ms.ub.BuildManifestURL(ms.name, dgst.String())
	if err != nil {
		return err
	}
	req, err := http.NewRequest("DELETE", u, nil)
	if err != nil {
		return err
	}

	resp, err := ms.client.Do(req)
	if err != nil {
		return err
	}
	defer resp.Body.Close()

	if SuccessStatus(resp.StatusCode) {
		return nil
	}
	return handleErrorResponse(resp)
}

func finishUpload(t *testing.T, ub *v2.URLBuilder, name string, uploadURLBase string, dgst digest.Digest) string {
	resp, err := doPushLayer(t, ub, name, dgst, uploadURLBase, nil)
	if err != nil {
		t.Fatalf("unexpected error doing push layer request: %v", err)
	}
	defer resp.Body.Close()

	checkResponse(t, "putting monolithic chunk", resp, http.StatusCreated)

	expectedLayerURL, err := ub.BuildBlobURL(name, dgst)
	if err != nil {
		t.Fatalf("error building expected layer url: %v", err)
	}

	checkHeaders(t, resp, http.Header{
		"Location":              []string{expectedLayerURL},
		"Content-Length":        []string{"0"},
		"Docker-Content-Digest": []string{dgst.String()},
	})

	return resp.Header.Get("Location")
}

// doPushLayer pushes the layer content returning the url on success returning
// the response. If you're only expecting a successful response, use pushLayer.
func doPushLayer(t *testing.T, ub *v2.URLBuilder, name string, dgst digest.Digest, uploadURLBase string, body io.Reader) (*http.Response, error) {
	u, err := url.Parse(uploadURLBase)
	if err != nil {
		t.Fatalf("unexpected error parsing pushLayer url: %v", err)
	}

	u.RawQuery = url.Values{
		"_state": u.Query()["_state"],

		"digest": []string{dgst.String()},
	}.Encode()

	uploadURL := u.String()

	// Just do a monolithic upload
	req, err := http.NewRequest("PUT", uploadURL, body)
	if err != nil {
		t.Fatalf("unexpected error creating new request: %v", err)
	}

	return http.DefaultClient.Do(req)
}

func (rsrbds *repositoryScopedRedisBlobDescriptorService) blobDescriptorHashKey(dgst digest.Digest) string {
	return "repository::" + rsrbds.repo + "::blobs::" + dgst.String()
}

func (ms *manifests) Get(dgst digest.Digest) (*manifest.SignedManifest, error) {
	// Call by Tag endpoint since the API uses the same
	// URL endpoint for tags and digests.
	return ms.GetByTag(dgst.String())
}

func (ms *manifests) Exists(dgst digest.Digest) (bool, error) {
	// Call by Tag endpoint since the API uses the same
	// URL endpoint for tags and digests.
	return ms.ExistsByTag(dgst.String())
}