// Push a local image to the registry
func (r *Session) PushImageJSONRegistry(imgData *ImgData, jsonRaw []byte, registry string) error {
u := registry + "images/" + imgData.ID + "/json"
glog.V(1).Infof("[registry] Calling PUT %s", u)
req, err := http.NewRequest("PUT", u, bytes.NewReader(jsonRaw))
if err != nil {
return err
}
req.Header.Add("Content-type", "application/json")
res, err := r.client.Do(req)
if err != nil {
return fmt.Errorf("Failed to upload metadata: %s", err)
}
defer res.Body.Close()
if res.StatusCode == 401 && strings.HasPrefix(registry, "http://") {
return httputils.NewHTTPRequestError("HTTP code 401, Docker will not send auth headers over HTTP.", res)
}
if res.StatusCode != 200 {
errBody, err := ioutil.ReadAll(res.Body)
if err != nil {
return httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d while uploading metadata and error when trying to parse response body: %s", res.StatusCode, err), res)
}
var jsonBody map[string]string
if err := json.Unmarshal(errBody, &jsonBody); err != nil {
errBody = []byte(err.Error())
} else if jsonBody["error"] == "Image already exists" {
return ErrAlreadyExists
}
return httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d while uploading metadata: %q", res.StatusCode, errBody), res)
}
return nil
}
func (r *Session) GetRepositoryData(remote string) (*RepositoryData, error) {
repositoryTarget := fmt.Sprintf("%srepositories/%s/images", r.indexEndpoint.VersionString(1), remote)
glog.V(1).Infof("[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 {
return nil, err
}
defer res.Body.Close()
if res.StatusCode == 401 {
return nil, errLoginRequired
}
// 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 {
glog.V(1).Infof("Error reading response body: %s", err)
}
return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Error: Status %d trying to pull repository %s: %q", res.StatusCode, remote, errBody), res)
}
var endpoints []string
if res.Header.Get("X-Docker-Endpoints") != "" {
endpoints, err = buildEndpointsList(res.Header["X-Docker-Endpoints"], r.indexEndpoint.VersionString(1))
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)
for _, elem := range remoteChecksums {
imgsData[elem.ID] = elem
}
return &RepositoryData{
ImgList: imgsData,
Endpoints: endpoints,
}, nil
}
func (r *Session) GetV2ImageBlob(ep *Endpoint, imageName string, dgst digest.Digest, blobWrtr io.Writer, auth *RequestAuthorization) error {
routeURL, err := getV2Builder(ep).BuildBlobURL(imageName, dgst)
if err != nil {
return err
}
method := "GET"
glog.V(1).Infof("[registry] Calling %q %s", method, routeURL)
req, err := http.NewRequest(method, routeURL, nil)
if err != nil {
return err
}
if err := auth.Authorize(req); err != nil {
return err
}
res, err := r.client.Do(req)
if err != nil {
return err
}
defer res.Body.Close()
if res.StatusCode != 200 {
if res.StatusCode == 401 {
return errLoginRequired
}
return httputils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to pull %s blob", res.StatusCode, imageName), res)
}
_, err = io.Copy(blobWrtr, res.Body)
return err
}
func (r *Session) GetV2ImageBlobReader(ep *Endpoint, imageName string, dgst digest.Digest, auth *RequestAuthorization) (io.ReadCloser, int64, error) {
routeURL, err := getV2Builder(ep).BuildBlobURL(imageName, dgst)
if err != nil {
return nil, 0, err
}
method := "GET"
glog.V(1).Infof("[registry] Calling %q %s", method, routeURL)
req, err := http.NewRequest(method, routeURL, nil)
if err != nil {
return nil, 0, err
}
if err := auth.Authorize(req); err != nil {
return nil, 0, err
}
res, err := r.client.Do(req)
if err != nil {
return nil, 0, err
}
if res.StatusCode != 200 {
if res.StatusCode == 401 {
return nil, 0, errLoginRequired
}
return nil, 0, httputils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to pull %s blob - %s", res.StatusCode, imageName, dgst), res)
}
lenStr := res.Header.Get("Content-Length")
l, err := strconv.ParseInt(lenStr, 10, 64)
if err != nil {
return nil, 0, err
}
return res.Body, l, err
}
// - Succeeded to head image blob (already exists)
// - Failed with no error (continue to Push the Blob)
// - Failed with error
func (r *Session) HeadV2ImageBlob(ep *Endpoint, imageName string, dgst digest.Digest, auth *RequestAuthorization) (bool, error) {
routeURL, err := getV2Builder(ep).BuildBlobURL(imageName, dgst)
if err != nil {
return false, err
}
method := "HEAD"
glog.V(1).Infof("[registry] Calling %q %s", method, routeURL)
req, err := http.NewRequest(method, routeURL, nil)
if err != nil {
return false, err
}
if err := auth.Authorize(req); err != nil {
return false, err
}
res, err := r.client.Do(req)
if err != nil {
return false, err
}
res.Body.Close() // close early, since we're not needing a body on this call .. yet?
switch {
case res.StatusCode >= 200 && res.StatusCode < 400:
// return something indicating no push needed
return true, nil
case res.StatusCode == 401:
return false, errLoginRequired
case res.StatusCode == 404:
// return something indicating blob push needed
return false, nil
}
return false, httputils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying head request for %s - %s", res.StatusCode, imageName, dgst), res)
}
func (r *Session) PushImageLayerRegistry(imgID string, layer io.Reader, registry string, jsonRaw []byte) (checksum string, checksumPayload string, err error) {
u := registry + "images/" + imgID + "/layer"
glog.V(1).Infof("[registry] Calling PUT %s", u)
tarsumLayer, err := tarsum.NewTarSum(layer, false, tarsum.Version0)
if err != nil {
return "", "", err
}
h := sha256.New()
h.Write(jsonRaw)
h.Write([]byte{'\n'})
checksumLayer := io.TeeReader(tarsumLayer, h)
req, err := http.NewRequest("PUT", u, checksumLayer)
if err != nil {
return "", "", err
}
req.Header.Add("Content-Type", "application/octet-stream")
req.ContentLength = -1
req.TransferEncoding = []string{"chunked"}
res, err := r.client.Do(req)
if err != nil {
return "", "", fmt.Errorf("Failed to upload layer: %v", err)
}
if rc, ok := layer.(io.Closer); ok {
if err := rc.Close(); err != nil {
return "", "", err
}
}
defer res.Body.Close()
if res.StatusCode != 200 {
errBody, err := ioutil.ReadAll(res.Body)
if err != nil {
return "", "", httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d while uploading metadata and error when trying to parse response body: %s", res.StatusCode, err), res)
}
return "", "", httputils.NewHTTPRequestError(fmt.Sprintf("Received HTTP code %d while uploading layer: %q", res.StatusCode, errBody), res)
}
checksumPayload = "sha256:" + hex.EncodeToString(h.Sum(nil))
return tarsumLayer.Sum(jsonRaw), checksumPayload, nil
}
// Check if an image exists in the Registry
func (r *Session) LookupRemoteImage(imgID, registry string) error {
res, err := r.client.Get(registry + "images/" + imgID + "/json")
if err != nil {
return err
}
res.Body.Close()
if res.StatusCode != 200 {
return httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d", res.StatusCode), res)
}
return nil
}
// Finally Push the (signed) manifest of the blobs we've just pushed
func (r *Session) PutV2ImageManifest(ep *Endpoint, imageName, tagName string, signedManifest, rawManifest []byte, auth *RequestAuthorization) (digest.Digest, error) {
routeURL, err := getV2Builder(ep).BuildManifestURL(imageName, tagName)
if err != nil {
return "", err
}
method := "PUT"
glog.V(1).Infof("[registry] Calling %q %s", method, routeURL)
req, err := http.NewRequest(method, routeURL, bytes.NewReader(signedManifest))
if err != nil {
return "", err
}
if err := auth.Authorize(req); err != nil {
return "", err
}
res, err := r.client.Do(req)
if err != nil {
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
}
errBody, err := ioutil.ReadAll(res.Body)
if err != nil {
return "", err
}
glog.V(1).Infof("Unexpected response from server: %q %#v", errBody, res.Header)
return "", httputils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to push %s:%s manifest", res.StatusCode, imageName, tagName), res)
}
hdrDigest, err := digest.ParseDigest(res.Header.Get(DockerDigestHeader))
if err != nil {
return "", fmt.Errorf("invalid manifest digest from registry: %s", err)
}
dgstVerifier, err := digest.NewDigestVerifier(hdrDigest)
if err != nil {
return "", fmt.Errorf("invalid manifest digest from registry: %s", err)
}
dgstVerifier.Write(rawManifest)
if !dgstVerifier.Verified() {
computedDigest, _ := digest.FromBytes(rawManifest)
return "", fmt.Errorf("unable to verify manifest digest: registry has %q, computed %q", hdrDigest, computedDigest)
}
return hdrDigest, nil
}
// GetV2ImageManifest simply fetches the bytes of a manifest and the remote
// digest, if available in the request. Note that the application shouldn't
// rely on the untrusted remoteDigest, and should also verify against a
// locally provided digest, if applicable.
func (r *Session) GetV2ImageManifest(ep *Endpoint, imageName, tagName string, auth *RequestAuthorization) (remoteDigest digest.Digest, p []byte, err error) {
routeURL, err := getV2Builder(ep).BuildManifestURL(imageName, tagName)
if err != nil {
return "", nil, err
}
method := "GET"
glog.V(1).Infof("[registry] Calling %q %s", method, routeURL)
req, err := http.NewRequest(method, routeURL, nil)
if err != nil {
return "", nil, err
}
if err := auth.Authorize(req); err != nil {
return "", nil, err
}
res, err := r.client.Do(req)
if err != nil {
return "", nil, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
if res.StatusCode == 401 {
return "", nil, errLoginRequired
} else if res.StatusCode == 404 {
return "", nil, ErrDoesNotExist
}
return "", nil, httputils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to fetch for %s:%s", res.StatusCode, imageName, tagName), res)
}
p, err = ioutil.ReadAll(res.Body)
if err != nil {
return "", nil, fmt.Errorf("Error while reading the http response: %s", err)
}
dgstHdr := res.Header.Get(DockerDigestHeader)
if dgstHdr != "" {
remoteDigest, err = digest.ParseDigest(dgstHdr)
if err != nil {
// NOTE(stevvooe): Including the remote digest is optional. We
// don't need to verify against it, but it is good practice.
remoteDigest = ""
glog.V(1).Infof("error parsing remote digest when fetching %v: %v", routeURL, err)
}
}
return
}
func (r *Session) SearchRepositories(term string) (*SearchResults, error) {
glog.V(1).Infof("Index server: %s", r.indexEndpoint)
u := r.indexEndpoint.VersionString(1) + "search?q=" + url.QueryEscape(term)
res, err := r.client.Get(u)
if err != nil {
return nil, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Unexpected status code %d", res.StatusCode), res)
}
result := new(SearchResults)
return result, json.NewDecoder(res.Body).Decode(result)
}
// initiateBlobUpload gets the blob upload location for the given image name.
func (r *Session) initiateBlobUpload(ep *Endpoint, imageName string, auth *RequestAuthorization) (location string, err error) {
routeURL, err := getV2Builder(ep).BuildBlobUploadURL(imageName)
if err != nil {
return "", err
}
glog.V(1).Infof("[registry] Calling %q %s", "POST", routeURL)
req, err := http.NewRequest("POST", routeURL, nil)
if err != nil {
return "", err
}
if err := auth.Authorize(req); err != nil {
return "", err
}
res, err := r.client.Do(req)
if err != nil {
return "", err
}
if res.StatusCode != http.StatusAccepted {
if res.StatusCode == http.StatusUnauthorized {
return "", errLoginRequired
}
if res.StatusCode == http.StatusNotFound {
return "", ErrDoesNotExist
}
errBody, err := ioutil.ReadAll(res.Body)
if err != nil {
return "", err
}
glog.V(1).Infof("Unexpected response from server: %q %#v", errBody, res.Header)
return "", httputils.NewHTTPRequestError(fmt.Sprintf("Server error: unexpected %d response status trying to initiate upload of %s", res.StatusCode, imageName), res)
}
if location = res.Header.Get("Location"); location == "" {
return "", fmt.Errorf("registry did not return a Location header for resumable blob upload for image %s", imageName)
}
return
}
// Retrieve the history of a given image from the Registry.
// Return a list of the parent's json (requested image included)
func (r *Session) GetRemoteHistory(imgID, registry string) ([]string, error) {
res, err := r.client.Get(registry + "images/" + imgID + "/ancestry")
if err != nil {
return nil, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
if res.StatusCode == 401 {
return nil, errLoginRequired
}
return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to fetch remote history for %s", res.StatusCode, imgID), res)
}
var history []string
if err := json.NewDecoder(res.Body).Decode(&history); err != nil {
return nil, fmt.Errorf("Error while reading the http response: %v", err)
}
glog.V(1).Infof("Ancestry: %v", history)
return history, nil
}
// push a tag on the registry.
// Remote has the format '<user>/<repo>
func (r *Session) PushRegistryTag(remote, revision, tag, registry string) error {
// "jsonify" the string
revision = "\"" + revision + "\""
path := fmt.Sprintf("repositories/%s/tags/%s", remote, 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), res)
}
return nil
}
// Push the image to the server for storage.
// 'layer' is an uncompressed reader of the blob to be pushed.
// The server will generate it's own checksum calculation.
func (r *Session) PutV2ImageBlob(ep *Endpoint, imageName string, dgst digest.Digest, blobRdr io.Reader, auth *RequestAuthorization) error {
location, err := r.initiateBlobUpload(ep, imageName, auth)
if err != nil {
return err
}
method := "PUT"
glog.V(1).Infof("[registry] Calling %q %s", method, location)
req, err := http.NewRequest(method, location, ioutil.NopCloser(blobRdr))
if err != nil {
return err
}
queryParams := req.URL.Query()
queryParams.Add("digest", dgst.String())
req.URL.RawQuery = queryParams.Encode()
if err := auth.Authorize(req); err != nil {
return err
}
res, err := r.client.Do(req)
if err != nil {
return err
}
defer res.Body.Close()
if res.StatusCode != 201 {
if res.StatusCode == 401 {
return errLoginRequired
}
errBody, err := ioutil.ReadAll(res.Body)
if err != nil {
return err
}
glog.V(1).Infof("Unexpected response from server: %q %#v", errBody, res.Header)
return httputils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to push %s blob - %s", res.StatusCode, imageName, dgst), res)
}
return nil
}
// Given a repository name, returns a json array of string tags
func (r *Session) GetV2RemoteTags(ep *Endpoint, imageName string, auth *RequestAuthorization) ([]string, error) {
routeURL, err := getV2Builder(ep).BuildTagsURL(imageName)
if err != nil {
return nil, err
}
method := "GET"
glog.V(1).Infof("[registry] Calling %q %s", method, routeURL)
req, err := http.NewRequest(method, routeURL, nil)
if err != nil {
return nil, err
}
if err := auth.Authorize(req); err != nil {
return nil, err
}
res, err := r.client.Do(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
if res.StatusCode == 401 {
return nil, errLoginRequired
} else if res.StatusCode == 404 {
return nil, ErrDoesNotExist
}
return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to fetch for %s", res.StatusCode, imageName), res)
}
var remote remoteTags
if err := json.NewDecoder(res.Body).Decode(&remote); err != nil {
return nil, fmt.Errorf("Error while decoding the http response: %s", err)
}
return remote.Tags, nil
}
// Retrieve an image from the Registry.
func (r *Session) GetRemoteImageJSON(imgID, registry string) ([]byte, int, error) {
res, err := r.client.Get(registry + "images/" + imgID + "/json")
if err != nil {
return nil, -1, fmt.Errorf("Failed to download json: %s", err)
}
defer res.Body.Close()
if res.StatusCode != 200 {
return nil, -1, httputils.NewHTTPRequestError(fmt.Sprintf("HTTP code %d", res.StatusCode), res)
}
// if the size header is not present, then set it to '-1'
imageSize := -1
if hdr := res.Header.Get("X-Docker-Size"); hdr != "" {
imageSize, err = strconv.Atoi(hdr)
if err != nil {
return nil, -1, err
}
}
jsonString, err := ioutil.ReadAll(res.Body)
if err != nil {
return nil, -1, fmt.Errorf("Failed to parse downloaded json: %v (%s)", err, jsonString)
}
return jsonString, imageSize, nil
}
func (r *Session) PushImageJSONIndex(remote string, 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.VersionString(1), remote, suffix)
glog.V(1).Infof("[registry] PUT %s", u)
glog.V(1).Infof("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")
glog.V(1).Infof("Redirected to %s", u)
}
defer res.Body.Close()
if res.StatusCode == 401 {
return nil, errLoginRequired
}
var tokens, endpoints []string
if !validate {
if res.StatusCode != 200 && res.StatusCode != 201 {
errBody, err := ioutil.ReadAll(res.Body)
if err != nil {
glog.V(1).Infof("Error reading response body: %s", err)
}
return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Error: Status %d trying to push repository %s: %q", res.StatusCode, remote, errBody), res)
}
tokens = res.Header["X-Docker-Token"]
glog.V(1).Infof("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.VersionString(1))
if err != nil {
return nil, err
}
} else {
if res.StatusCode != 204 {
errBody, err := ioutil.ReadAll(res.Body)
if err != nil {
glog.V(1).Infof("Error reading response body: %s", err)
}
return nil, httputils.NewHTTPRequestError(fmt.Sprintf("Error: Status %d trying to push checksums %s: %q", res.StatusCode, remote, errBody), res)
}
}
return &RepositoryData{
Endpoints: endpoints,
}, nil
}