bcccf35bb2
Pushing a v2 image layer has two steps: - POST to get a new upload URL - PUT to that upload URL We were previously not checking the response code of the POST request and the PUT would fail in weird ways. Docker-DCO-1.1-Signed-off-by: Josh Hawn <josh.hawn@docker.com> (github: jlhawn)
378 lines
10 KiB
Go
378 lines
10 KiB
Go
package registry
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import (
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"strconv"
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log "github.com/Sirupsen/logrus"
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"github.com/docker/docker/registry/v2"
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"github.com/docker/docker/utils"
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)
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const DockerDigestHeader = "Docker-Content-Digest"
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func getV2Builder(e *Endpoint) *v2.URLBuilder {
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if e.URLBuilder == nil {
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e.URLBuilder = v2.NewURLBuilder(e.URL)
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}
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return e.URLBuilder
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}
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func (r *Session) V2RegistryEndpoint(index *IndexInfo) (ep *Endpoint, err error) {
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// TODO check if should use Mirror
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if index.Official {
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ep, err = newEndpoint(REGISTRYSERVER, true)
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if err != nil {
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return
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}
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err = validateEndpoint(ep)
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if err != nil {
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return
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}
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} else if r.indexEndpoint.String() == index.GetAuthConfigKey() {
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ep = r.indexEndpoint
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} else {
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ep, err = NewEndpoint(index)
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if err != nil {
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return
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}
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}
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ep.URLBuilder = v2.NewURLBuilder(ep.URL)
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return
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}
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// GetV2Authorization gets the authorization needed to the given image
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// If readonly access is requested, then only the authorization may
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// only be used for Get operations.
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func (r *Session) GetV2Authorization(ep *Endpoint, imageName string, readOnly bool) (auth *RequestAuthorization, err error) {
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scopes := []string{"pull"}
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if !readOnly {
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scopes = append(scopes, "push")
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}
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log.Debugf("Getting authorization for %s %s", imageName, scopes)
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return NewRequestAuthorization(r.GetAuthConfig(true), ep, "repository", imageName, scopes), nil
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}
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//
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// 1) Check if TarSum of each layer exists /v2/
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// 1.a) if 200, continue
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// 1.b) if 300, then push the
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// 1.c) if anything else, err
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// 2) PUT the created/signed manifest
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//
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func (r *Session) GetV2ImageManifest(ep *Endpoint, imageName, tagName string, auth *RequestAuthorization) ([]byte, string, error) {
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routeURL, err := getV2Builder(ep).BuildManifestURL(imageName, tagName)
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if err != nil {
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return nil, "", err
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}
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method := "GET"
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log.Debugf("[registry] Calling %q %s", method, routeURL)
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req, err := r.reqFactory.NewRequest(method, routeURL, nil)
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if err != nil {
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return nil, "", err
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}
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if err := auth.Authorize(req); err != nil {
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return nil, "", err
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}
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res, _, err := r.doRequest(req)
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if err != nil {
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return nil, "", err
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}
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defer res.Body.Close()
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if res.StatusCode != 200 {
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if res.StatusCode == 401 {
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return nil, "", errLoginRequired
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} else if res.StatusCode == 404 {
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return nil, "", ErrDoesNotExist
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}
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return nil, "", utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to fetch for %s:%s", res.StatusCode, imageName, tagName), res)
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}
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buf, err := ioutil.ReadAll(res.Body)
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if err != nil {
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return nil, "", fmt.Errorf("Error while reading the http response: %s", err)
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}
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return buf, res.Header.Get(DockerDigestHeader), nil
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}
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// - Succeeded to head image blob (already exists)
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// - Failed with no error (continue to Push the Blob)
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// - Failed with error
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func (r *Session) HeadV2ImageBlob(ep *Endpoint, imageName, sumType, sum string, auth *RequestAuthorization) (bool, error) {
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routeURL, err := getV2Builder(ep).BuildBlobURL(imageName, sumType+":"+sum)
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if err != nil {
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return false, err
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}
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method := "HEAD"
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log.Debugf("[registry] Calling %q %s", method, routeURL)
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req, err := r.reqFactory.NewRequest(method, routeURL, nil)
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if err != nil {
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return false, err
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}
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if err := auth.Authorize(req); err != nil {
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return false, err
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}
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res, _, err := r.doRequest(req)
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if err != nil {
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return false, err
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}
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res.Body.Close() // close early, since we're not needing a body on this call .. yet?
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switch {
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case res.StatusCode >= 200 && res.StatusCode < 400:
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// return something indicating no push needed
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return true, nil
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case res.StatusCode == 401:
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return false, errLoginRequired
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case res.StatusCode == 404:
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// return something indicating blob push needed
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return false, nil
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}
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return false, utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying head request for %s - %s:%s", res.StatusCode, imageName, sumType, sum), res)
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}
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func (r *Session) GetV2ImageBlob(ep *Endpoint, imageName, sumType, sum string, blobWrtr io.Writer, auth *RequestAuthorization) error {
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routeURL, err := getV2Builder(ep).BuildBlobURL(imageName, sumType+":"+sum)
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if err != nil {
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return err
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}
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method := "GET"
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log.Debugf("[registry] Calling %q %s", method, routeURL)
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req, err := r.reqFactory.NewRequest(method, routeURL, nil)
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if err != nil {
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return err
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}
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if err := auth.Authorize(req); err != nil {
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return err
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}
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res, _, err := r.doRequest(req)
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if err != nil {
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return err
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}
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defer res.Body.Close()
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if res.StatusCode != 200 {
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if res.StatusCode == 401 {
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return errLoginRequired
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}
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return utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to pull %s blob", res.StatusCode, imageName), res)
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}
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_, err = io.Copy(blobWrtr, res.Body)
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return err
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}
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func (r *Session) GetV2ImageBlobReader(ep *Endpoint, imageName, sumType, sum string, auth *RequestAuthorization) (io.ReadCloser, int64, error) {
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routeURL, err := getV2Builder(ep).BuildBlobURL(imageName, sumType+":"+sum)
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if err != nil {
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return nil, 0, err
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}
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method := "GET"
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log.Debugf("[registry] Calling %q %s", method, routeURL)
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req, err := r.reqFactory.NewRequest(method, routeURL, nil)
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if err != nil {
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return nil, 0, err
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}
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if err := auth.Authorize(req); err != nil {
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return nil, 0, err
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}
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res, _, err := r.doRequest(req)
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if err != nil {
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return nil, 0, err
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}
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if res.StatusCode != 200 {
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if res.StatusCode == 401 {
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return nil, 0, errLoginRequired
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}
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return nil, 0, utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to pull %s blob - %s:%s", res.StatusCode, imageName, sumType, sum), res)
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}
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lenStr := res.Header.Get("Content-Length")
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l, err := strconv.ParseInt(lenStr, 10, 64)
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if err != nil {
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return nil, 0, err
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}
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return res.Body, l, err
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}
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// Push the image to the server for storage.
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// 'layer' is an uncompressed reader of the blob to be pushed.
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// The server will generate it's own checksum calculation.
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func (r *Session) PutV2ImageBlob(ep *Endpoint, imageName, sumType, sumStr string, blobRdr io.Reader, auth *RequestAuthorization) error {
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location, err := r.initiateBlobUpload(ep, imageName, auth)
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if err != nil {
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return err
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}
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method := "PUT"
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log.Debugf("[registry] Calling %q %s", method, location)
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req, err := r.reqFactory.NewRequest(method, location, ioutil.NopCloser(blobRdr))
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if err != nil {
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return err
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}
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queryParams := req.URL.Query()
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queryParams.Add("digest", sumType+":"+sumStr)
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req.URL.RawQuery = queryParams.Encode()
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if err := auth.Authorize(req); err != nil {
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return err
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}
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res, _, err := r.doRequest(req)
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if err != nil {
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return err
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}
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defer res.Body.Close()
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if res.StatusCode != 201 {
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if res.StatusCode == 401 {
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return errLoginRequired
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}
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errBody, err := ioutil.ReadAll(res.Body)
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if err != nil {
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return err
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}
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log.Debugf("Unexpected response from server: %q %#v", errBody, res.Header)
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return utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to push %s blob - %s:%s", res.StatusCode, imageName, sumType, sumStr), res)
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}
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return nil
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}
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// initiateBlobUpload gets the blob upload location for the given image name.
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func (r *Session) initiateBlobUpload(ep *Endpoint, imageName string, auth *RequestAuthorization) (location string, err error) {
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routeURL, err := getV2Builder(ep).BuildBlobUploadURL(imageName)
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if err != nil {
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return "", err
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}
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log.Debugf("[registry] Calling %q %s", "POST", routeURL)
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req, err := r.reqFactory.NewRequest("POST", routeURL, nil)
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if err != nil {
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return "", err
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}
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if err := auth.Authorize(req); err != nil {
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return "", err
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}
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res, _, err := r.doRequest(req)
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if err != nil {
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return "", err
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}
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if res.StatusCode != http.StatusAccepted {
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if res.StatusCode == http.StatusUnauthorized {
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return "", errLoginRequired
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}
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if res.StatusCode == http.StatusNotFound {
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return "", ErrDoesNotExist
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}
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errBody, err := ioutil.ReadAll(res.Body)
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if err != nil {
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return "", err
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}
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log.Debugf("Unexpected response from server: %q %#v", errBody, res.Header)
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return "", utils.NewHTTPRequestError(fmt.Sprintf("Server error: unexpected %d response status trying to initiate upload of %s", res.StatusCode, imageName), res)
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}
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if location = res.Header.Get("Location"); location == "" {
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return "", fmt.Errorf("registry did not return a Location header for resumable blob upload for image %s", imageName)
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}
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return
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}
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// Finally Push the (signed) manifest of the blobs we've just pushed
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func (r *Session) PutV2ImageManifest(ep *Endpoint, imageName, tagName string, manifestRdr io.Reader, auth *RequestAuthorization) (string, error) {
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routeURL, err := getV2Builder(ep).BuildManifestURL(imageName, tagName)
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if err != nil {
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return "", err
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}
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method := "PUT"
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log.Debugf("[registry] Calling %q %s", method, routeURL)
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req, err := r.reqFactory.NewRequest(method, routeURL, manifestRdr)
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if err != nil {
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return "", err
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}
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if err := auth.Authorize(req); err != nil {
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return "", err
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}
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res, _, err := r.doRequest(req)
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if err != nil {
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return "", err
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}
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defer res.Body.Close()
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// All 2xx and 3xx responses can be accepted for a put.
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if res.StatusCode >= 400 {
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if res.StatusCode == 401 {
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return "", errLoginRequired
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}
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errBody, err := ioutil.ReadAll(res.Body)
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if err != nil {
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return "", err
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}
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log.Debugf("Unexpected response from server: %q %#v", errBody, res.Header)
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return "", utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to push %s:%s manifest", res.StatusCode, imageName, tagName), res)
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}
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return res.Header.Get(DockerDigestHeader), nil
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}
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type remoteTags struct {
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name string
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tags []string
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}
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// Given a repository name, returns a json array of string tags
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func (r *Session) GetV2RemoteTags(ep *Endpoint, imageName string, auth *RequestAuthorization) ([]string, error) {
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routeURL, err := getV2Builder(ep).BuildTagsURL(imageName)
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if err != nil {
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return nil, err
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}
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method := "GET"
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log.Debugf("[registry] Calling %q %s", method, routeURL)
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req, err := r.reqFactory.NewRequest(method, routeURL, nil)
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if err != nil {
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return nil, err
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}
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if err := auth.Authorize(req); err != nil {
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return nil, err
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}
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res, _, err := r.doRequest(req)
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if err != nil {
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return nil, err
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}
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defer res.Body.Close()
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if res.StatusCode != 200 {
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if res.StatusCode == 401 {
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return nil, errLoginRequired
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} else if res.StatusCode == 404 {
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return nil, ErrDoesNotExist
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}
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return nil, utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to fetch for %s", res.StatusCode, imageName), res)
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}
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decoder := json.NewDecoder(res.Body)
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var remote remoteTags
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err = decoder.Decode(&remote)
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if err != nil {
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return nil, fmt.Errorf("Error while decoding the http response: %s", err)
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}
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return remote.tags, nil
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}
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