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Merge pull request #11109 from ncdc/pull-by-digest

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Add support for referring to images by digest
This commit is contained in:
Arnaud Porterie 2015-03-17 08:15:45 -07:00
commit 00889e1519
5 changed files with 37 additions and 32 deletions
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40
docs/session_v2.go
View file

@ -12,6 +12,8 @@ import (
"github.com/docker/docker/utils"
)
const DockerDigestHeader = "Docker-Content-Digest"
func getV2Builder(e *Endpoint) *v2.URLBuilder {
if e.URLBuilder == nil {
e.URLBuilder = v2.NewURLBuilder(e.URL)
@ -63,10 +65,10 @@ func (r *Session) GetV2Authorization(ep *Endpoint, imageName string, readOnly bo
// 1.c) if anything else, err
// 2) PUT the created/signed manifest
//
func (r *Session) GetV2ImageManifest(ep *Endpoint, imageName, tagName string, auth *RequestAuthorization) ([]byte, error) {
func (r *Session) GetV2ImageManifest(ep *Endpoint, imageName, tagName string, auth *RequestAuthorization) ([]byte, string, error) {
routeURL, err := getV2Builder(ep).BuildManifestURL(imageName, tagName)
if err != nil {
return nil, err
return nil, "", err
}
method := "GET"
@ -74,30 +76,30 @@ func (r *Session) GetV2ImageManifest(ep *Endpoint, imageName, tagName string, au
req, err := r.reqFactory.NewRequest(method, routeURL, nil)
if err != nil {
return nil, err
return nil, "", err
}
if err := auth.Authorize(req); err != nil {
return nil, err
return nil, "", err
}
res, _, err := r.doRequest(req)
if err != nil {
return nil, err
return nil, "", err
}
defer res.Body.Close()
if res.StatusCode != 200 {
if res.StatusCode == 401 {
return nil, errLoginRequired
return nil, "", errLoginRequired
} else if res.StatusCode == 404 {
return nil, ErrDoesNotExist
return nil, "", ErrDoesNotExist
}
return nil, utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to fetch for %s:%s", res.StatusCode, imageName, tagName), res)
return nil, "", utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to fetch for %s:%s", res.StatusCode, imageName, tagName), res)
}
buf, err := ioutil.ReadAll(res.Body)
if err != nil {
return nil, fmt.Errorf("Error while reading the http response: %s", err)
return nil, "", fmt.Errorf("Error while reading the http response: %s", err)
}
return buf, nil
return buf, res.Header.Get(DockerDigestHeader), nil
}
// - Succeeded to head image blob (already exists)
@ -261,41 +263,41 @@ func (r *Session) PutV2ImageBlob(ep *Endpoint, imageName, sumType, sumStr string
}
// Finally Push the (signed) manifest of the blobs we've just pushed
func (r *Session) PutV2ImageManifest(ep *Endpoint, imageName, tagName string, manifestRdr io.Reader, auth *RequestAuthorization) error {
func (r *Session) PutV2ImageManifest(ep *Endpoint, imageName, tagName string, manifestRdr io.Reader, auth *RequestAuthorization) (string, error) {
routeURL, err := getV2Builder(ep).BuildManifestURL(imageName, tagName)
if err != nil {
return err
return "", err
}
method := "PUT"
log.Debugf("[registry] Calling %q %s", method, routeURL)
req, err := r.reqFactory.NewRequest(method, routeURL, manifestRdr)
if err != nil {
return err
return "", err
}
if err := auth.Authorize(req); err != nil {
return err
return "", err
}
res, _, err := r.doRequest(req)
if err != nil {
return err
return "", err
}
defer res.Body.Close()
// All 2xx and 3xx responses can be accepted for a put.
if res.StatusCode >= 400 {
if res.StatusCode == 401 {
return errLoginRequired
return "", errLoginRequired
}
errBody, err := ioutil.ReadAll(res.Body)
if err != nil {
return err
return "", err
}
log.Debugf("Unexpected response from server: %q %#v", errBody, res.Header)
return utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to push %s:%s manifest", res.StatusCode, imageName, tagName), res)
return "", utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to push %s:%s manifest", res.StatusCode, imageName, tagName), res)
}
return nil
return res.Header.Get(DockerDigestHeader), nil
}
type remoteTags struct {

3
docs/v2/regexp.go
View file

@ -17,3 +17,6 @@ var RepositoryNameRegexp = regexp.MustCompile(`(?:` + RepositoryNameComponentReg
// TagNameRegexp matches valid tag names. From docker/docker:graph/tags.go.
var TagNameRegexp = regexp.MustCompile(`[\w][\w.-]{0,127}`)
// DigestRegexp matches valid digest types.
var DigestRegexp = regexp.MustCompile(`[a-zA-Z0-9-_+.]+:[a-zA-Z0-9-_+.=]+`)

8
docs/v2/routes.go
View file

@ -33,11 +33,11 @@ func Router() *mux.Router {
Path("/v2/").
Name(RouteNameBase)
// GET /v2/<name>/manifest/<tag> Image Manifest Fetch the image manifest identified by name and tag.
// PUT /v2/<name>/manifest/<tag> Image Manifest Upload the image manifest identified by name and tag.
// DELETE /v2/<name>/manifest/<tag> Image Manifest Delete the image identified by name and tag.
// GET /v2/<name>/manifest/<reference> Image Manifest Fetch the image manifest identified by name and reference where reference can be a tag or digest.
// PUT /v2/<name>/manifest/<reference> Image Manifest Upload the image manifest identified by name and reference where reference can be a tag or digest.
// DELETE /v2/<name>/manifest/<reference> Image Manifest Delete the image identified by name and reference where reference can be a tag or digest.
router.
Path("/v2/{name:" + RepositoryNameRegexp.String() + "}/manifests/{tag:" + TagNameRegexp.String() + "}").
Path("/v2/{name:" + RepositoryNameRegexp.String() + "}/manifests/{reference:" + TagNameRegexp.String() + "|" + DigestRegexp.String() + "}").
Name(RouteNameManifest)
// GET /v2/<name>/tags/list Tags Fetch the tags under the repository identified by name.

6
docs/v2/routes_test.go
View file

@ -56,7 +56,7 @@ func TestRouter(t *testing.T) {
RequestURI: "/v2/foo/manifests/bar",
Vars: map[string]string{
"name": "foo",
"tag": "bar",
"reference": "bar",
},
},
{
@ -64,7 +64,7 @@ func TestRouter(t *testing.T) {
RequestURI: "/v2/foo/bar/manifests/tag",
Vars: map[string]string{
"name": "foo/bar",
"tag": "tag",
"reference": "tag",
},
},
{
@ -129,7 +129,7 @@ func TestRouter(t *testing.T) {
RequestURI: "/v2/foo/bar/manifests/manifests/tags",
Vars: map[string]string{
"name": "foo/bar/manifests",
"tag": "tags",
"reference": "tags",
},
},
{

6
docs/v2/urls.go
View file

@ -74,11 +74,11 @@ func (ub *URLBuilder) BuildTagsURL(name string) (string, error) {
return tagsURL.String(), nil
}
// BuildManifestURL constructs a url for the manifest identified by name and tag.
func (ub *URLBuilder) BuildManifestURL(name, tag string) (string, error) {
// BuildManifestURL constructs a url for the manifest identified by name and reference.
func (ub *URLBuilder) BuildManifestURL(name, reference string) (string, error) {
route := ub.cloneRoute(RouteNameManifest)
manifestURL, err := route.URL("name", name, "tag", tag)
manifestURL, err := route.URL("name", name, "reference", reference)
if err != nil {
return "", err
}