// GetRemoteTags retrieves all tags from the given repository. It queries each
// of the registries supplied in the registries argument, and returns data from
// the first one that answers the query successfully. It returns a map with
// tag names as the keys and image IDs as the values.
func (r *Session) GetRemoteTags(registries []string, repositoryRef reference.Named) (map[string]string, error) {
repository := repositoryRef.RemoteName()
if strings.Count(repository, "/") == 0 {
// This will be removed once the registry supports auto-resolution on
// the "library" namespace
repository = "library/" + repository
}
for _, host := range registries {
endpoint := fmt.Sprintf("%srepositories/%s/tags", host, repository)
res, err := r.client.Get(endpoint)
if err != nil {
return nil, err
}
logrus.Debugf("Got status code %d from %s", res.StatusCode, endpoint)
defer res.Body.Close()
if res.StatusCode == 404 {
return nil, ErrRepoNotFound
}
if res.StatusCode != 200 {
continue
}
result := make(map[string]string)
if err := json.NewDecoder(res.Body).Decode(&result); err != nil {
return nil, err
}
return result, nil
}
return nil, fmt.Errorf("Could not reach any registry endpoint")
}
// PushRegistryTag pushes a tag on the registry.
// Remote has the format '<user>/<repo>
func (r *Session) PushRegistryTag(remote reference.Named, revision, tag, registry string) error {
// "jsonify" the string
revision = "\"" + revision + "\""
path := fmt.Sprintf("repositories/%s/tags/%s", remote.RemoteName(), tag)
req, err := http.NewRequest("PUT", registry+path, strings.NewReader(revision))
if err != nil {
return err
}
req.Header.Add("Content-type", "application/json")
req.ContentLength = int64(len(revision))
res, err := r.client.Do(req)
if err != nil {
return err
}
res.Body.Close()
if res.StatusCode != 200 && res.StatusCode != 201 {
return httputils.NewHTTPRequestError(fmt.Sprintf("Internal server error: %d trying to push tag %s on %s", res.StatusCode, tag, remote.RemoteName()), res)
}
return nil
}
// PushImageJSONIndex uploads an image list to the repository
func (r *Session) PushImageJSONIndex(remote reference.Named, imgList []*ImgData, validate bool, regs []string) (*RepositoryData, error) {
cleanImgList := []*ImgData{}
if validate {
for _, elem := range imgList {
if elem.Checksum != "" {
cleanImgList = append(cleanImgList, elem)
}
}
} else {
cleanImgList = imgList
}
imgListJSON, err := json.Marshal(cleanImgList)
if err != nil {
return nil, err
}
var suffix string
if validate {
suffix = "images"
}
u := fmt.Sprintf("%srepositories/%s/%s", r.indexEndpoint.String(), remote.RemoteName(), suffix)
logrus.Debugf("[registry] PUT %s", u)
logrus.Debugf("Image list pushed to index:\n%s", imgListJSON)
headers := map[string][]string{
"Content-type": {"application/json"},
// this will set basic auth in r.client.Transport and send cached X-Docker-Token headers for all subsequent requests
"X-Docker-Token": {"true"},
}
if validate {
headers["X-Docker-Endpoints"] = regs
}
// Redirect if necessary
var res *http.Response
for {
if res, err = r.putImageRequest(u, headers, imgListJSON); err != nil {
return nil, err
}
if !shouldRedirect(res) {
break
}
res.Body.Close()
u = res.Header.Get("Location")
logrus.Debugf("Redirected to %s", u)
}
defer res.Body.Close()
if res.StatusCode == 401 {
return nil, errcode.ErrorCodeUnauthorized.WithArgs()
}
var tokens, endpoints []string
if !validate {
if res.StatusCode != 200 && res.StatusCode != 201 {
errBody, err := ioutil.ReadAll(res.Body)
if err != nil {
logrus.Debugf("Error reading response body: %s", err)
}
return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Error: Status %d trying to push repository %s: %q", res.StatusCode, remote.RemoteName(), errBody), res)
}
tokens = res.Header["X-Docker-Token"]
logrus.Debugf("Auth token: %v", tokens)
if res.Header.Get("X-Docker-Endpoints") == "" {
return nil, fmt.Errorf("Index response didn't contain any endpoints")
}
endpoints, err = buildEndpointsList(res.Header["X-Docker-Endpoints"], r.indexEndpoint.String())
if err != nil {
return nil, err
}
} else {
if res.StatusCode != 204 {
errBody, err := ioutil.ReadAll(res.Body)
if err != nil {
logrus.Debugf("Error reading response body: %s", err)
}
return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Error: Status %d trying to push checksums %s: %q", res.StatusCode, remote.RemoteName(), errBody), res)
}
}
return &RepositoryData{
Endpoints: endpoints,
}, nil
}
// GetRepositoryData returns lists of images and endpoints for the repository
func (r *Session) GetRepositoryData(name reference.Named) (*RepositoryData, error) {
repositoryTarget := fmt.Sprintf("%srepositories/%s/images", r.indexEndpoint.String(), name.RemoteName())
logrus.Debugf("[registry] Calling GET %s", repositoryTarget)
req, err := http.NewRequest("GET", repositoryTarget, nil)
if err != nil {
return nil, err
}
// this will set basic auth in r.client.Transport and send cached X-Docker-Token headers for all subsequent requests
req.Header.Set("X-Docker-Token", "true")
res, err := r.client.Do(req)
if err != nil {
// check if the error is because of i/o timeout
// and return a non-obtuse error message for users
// "Get https://index.docker.io/v1/repositories/library/busybox/images: i/o timeout"
// was a top search on the docker user forum
if isTimeout(err) {
return nil, fmt.Errorf("Network timed out while trying to connect to %s. You may want to check your internet connection or if you are behind a proxy.", repositoryTarget)
}
return nil, fmt.Errorf("Error while pulling image: %v", err)
}
defer res.Body.Close()
if res.StatusCode == 401 {
return nil, errcode.ErrorCodeUnauthorized.WithArgs()
}
// TODO: Right now we're ignoring checksums in the response body.
// In the future, we need to use them to check image validity.
if res.StatusCode == 404 {
return nil, httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code: %d", res.StatusCode), res)
} else if res.StatusCode != 200 {
errBody, err := ioutil.ReadAll(res.Body)
if err != nil {
logrus.Debugf("Error reading response body: %s", err)
}
return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Error: Status %d trying to pull repository %s: %q", res.StatusCode, name.RemoteName(), errBody), res)
}
var endpoints []string
if res.Header.Get("X-Docker-Endpoints") != "" {
endpoints, err = buildEndpointsList(res.Header["X-Docker-Endpoints"], r.indexEndpoint.String())
if err != nil {
return nil, err
}
} else {
// Assume the endpoint is on the same host
endpoints = append(endpoints, fmt.Sprintf("%s://%s/v1/", r.indexEndpoint.URL.Scheme, req.URL.Host))
}
remoteChecksums := []*ImgData{}
if err := json.NewDecoder(res.Body).Decode(&remoteChecksums); err != nil {
return nil, err
}
// Forge a better object from the retrieved data
imgsData := make(map[string]*ImgData, len(remoteChecksums))
for _, elem := range remoteChecksums {
imgsData[elem.ID] = elem
}
return &RepositoryData{
ImgList: imgsData,
Endpoints: endpoints,
}, nil
}
