forked from TrueCloudLab/distribution
390 lines
10 KiB
Go
390 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/url"
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"strconv"
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log "github.com/Sirupsen/logrus"
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"github.com/docker/docker/utils"
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"github.com/gorilla/mux"
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)
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func newV2RegistryRouter() *mux.Router {
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router := mux.NewRouter()
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v2Router := router.PathPrefix("/v2/").Subrouter()
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// Version Info
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v2Router.Path("/version").Name("version")
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// Image Manifests
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v2Router.Path("/manifest/{imagename:[a-z0-9-._/]+}/{tagname:[a-zA-Z0-9-._]+}").Name("manifests")
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// List Image Tags
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v2Router.Path("/tags/{imagename:[a-z0-9-._/]+}").Name("tags")
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// Download a blob
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v2Router.Path("/blob/{imagename:[a-z0-9-._/]+}/{sumtype:[a-z0-9._+-]+}/{sum:[a-fA-F0-9]{4,}}").Name("downloadBlob")
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// Upload a blob
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v2Router.Path("/blob/{imagename:[a-z0-9-._/]+}/{sumtype:[a-z0-9._+-]+}").Name("uploadBlob")
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// Mounting a blob in an image
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v2Router.Path("/mountblob/{imagename:[a-z0-9-._/]+}/{sumtype:[a-z0-9._+-]+}/{sum:[a-fA-F0-9]{4,}}").Name("mountBlob")
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return router
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}
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// APIVersion2 /v2/
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var v2HTTPRoutes = newV2RegistryRouter()
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func getV2URL(e *Endpoint, routeName string, vars map[string]string) (*url.URL, error) {
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route := v2HTTPRoutes.Get(routeName)
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if route == nil {
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return nil, fmt.Errorf("unknown regisry v2 route name: %q", routeName)
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}
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varReplace := make([]string, 0, len(vars)*2)
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for key, val := range vars {
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varReplace = append(varReplace, key, val)
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}
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routePath, err := route.URLPath(varReplace...)
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if err != nil {
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return nil, fmt.Errorf("unable to make registry route %q with vars %v: %s", routeName, vars, err)
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}
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u, err := url.Parse(REGISTRYSERVER)
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if err != nil {
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return nil, fmt.Errorf("invalid registry url: %s", err)
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}
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return &url.URL{
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Scheme: u.Scheme,
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Host: u.Host,
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Path: routePath.Path,
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}, nil
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}
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// V2 Provenance POC
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func (r *Session) GetV2Version(token []string) (*RegistryInfo, error) {
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routeURL, err := getV2URL(r.indexEndpoint, "version", nil)
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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.String())
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req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
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if err != nil {
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return nil, err
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}
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setTokenAuth(req, token)
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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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return nil, utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d fetching Version", res.StatusCode), res)
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}
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decoder := json.NewDecoder(res.Body)
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versionInfo := new(RegistryInfo)
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err = decoder.Decode(versionInfo)
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if err != nil {
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return nil, fmt.Errorf("unable to decode GetV2Version JSON response: %s", err)
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}
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return versionInfo, 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(imageName, tagName string, token []string) ([]byte, error) {
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vars := map[string]string{
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"imagename": imageName,
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"tagname": tagName,
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}
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routeURL, err := getV2URL(r.indexEndpoint, "manifests", vars)
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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.String())
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req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
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if err != nil {
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return nil, err
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}
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setTokenAuth(req, token)
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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, nil
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}
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// - Succeeded to mount for this image scope
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// - Failed with no error (So continue to Push the Blob)
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// - Failed with error
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func (r *Session) PostV2ImageMountBlob(imageName, sumType, sum string, token []string) (bool, error) {
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vars := map[string]string{
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"imagename": imageName,
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"sumtype": sumType,
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"sum": sum,
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}
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routeURL, err := getV2URL(r.indexEndpoint, "mountBlob", vars)
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if err != nil {
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return false, err
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}
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method := "POST"
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log.Debugf("[registry] Calling %q %s", method, routeURL.String())
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req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
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if err != nil {
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return false, err
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}
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setTokenAuth(req, token)
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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 res.StatusCode {
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case 200:
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// return something indicating no push needed
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return true, nil
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case 300:
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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, fmt.Errorf("Failed to mount %q - %s:%s : %d", imageName, sumType, sum, res.StatusCode)
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}
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func (r *Session) GetV2ImageBlob(imageName, sumType, sum string, blobWrtr io.Writer, token []string) error {
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vars := map[string]string{
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"imagename": imageName,
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"sumtype": sumType,
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"sum": sum,
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}
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routeURL, err := getV2URL(r.indexEndpoint, "downloadBlob", vars)
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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.String())
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req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
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if err != nil {
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return err
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}
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setTokenAuth(req, token)
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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(imageName, sumType, sum string, token []string) (io.ReadCloser, int64, error) {
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vars := map[string]string{
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"imagename": imageName,
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"sumtype": sumType,
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"sum": sum,
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}
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routeURL, err := getV2URL(r.indexEndpoint, "downloadBlob", vars)
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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.String())
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req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
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if err != nil {
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return nil, 0, err
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}
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setTokenAuth(req, token)
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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", res.StatusCode, imageName), 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(imageName, sumType string, blobRdr io.Reader, token []string) (serverChecksum string, err error) {
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vars := map[string]string{
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"imagename": imageName,
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"sumtype": sumType,
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}
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routeURL, err := getV2URL(r.indexEndpoint, "uploadBlob", vars)
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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.String())
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req, err := r.reqFactory.NewRequest(method, routeURL.String(), blobRdr)
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if err != nil {
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return "", err
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}
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setTokenAuth(req, token)
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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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return "", utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to push %s blob", res.StatusCode, imageName), res)
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}
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type sumReturn struct {
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Checksum string `json:"checksum"`
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}
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decoder := json.NewDecoder(res.Body)
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var sumInfo sumReturn
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err = decoder.Decode(&sumInfo)
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if err != nil {
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return "", fmt.Errorf("unable to decode PutV2ImageBlob JSON response: %s", err)
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}
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// XXX this is a json struct from the registry, with its checksum
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return sumInfo.Checksum, nil
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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(imageName, tagName string, manifestRdr io.Reader, token []string) error {
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vars := map[string]string{
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"imagename": imageName,
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"tagname": tagName,
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}
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routeURL, err := getV2URL(r.indexEndpoint, "manifests", vars)
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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.String())
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req, err := r.reqFactory.NewRequest(method, routeURL.String(), manifestRdr)
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if err != nil {
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return err
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}
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setTokenAuth(req, token)
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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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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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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 nil
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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(imageName string, token []string) ([]string, error) {
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vars := map[string]string{
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"imagename": imageName,
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}
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routeURL, err := getV2URL(r.indexEndpoint, "tags", vars)
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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.String())
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req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
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if err != nil {
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return nil, err
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}
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setTokenAuth(req, token)
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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 tags []string
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err = decoder.Decode(&tags)
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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 tags, nil
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}
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