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session_prov.go
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session_prov.go
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package registry
import (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"log"
"net/url"
"github.com/docker/docker/registry/v2/routes"
"github.com/docker/docker/utils"
)
// APIVersion2 /v2/
var v2HTTPRoutes = routes.NewRegistryRouter()
func getV2URL(e *Endpoint, routeName string, vars map[string]string) (*url.URL, error) {
route := v2HTTPRoutes.Get(routeName)
if route == nil {
return nil, fmt.Errorf("unknown regisry v2 route name: %q", routeName)
}
varReplace := make([]string, 0, len(vars)*2)
for key, val := range vars {
varReplace = append(varReplace, key, val)
}
routePath, err := route.URLPath(varReplace...)
if err != nil {
return nil, fmt.Errorf("unable to make registry route %q with vars %v: %s", routeName, vars, err)
}
fmt.Println(e.URL.Scheme)
fmt.Println(e.URL.Host)
return &url.URL{
Scheme: e.URL.Scheme,
Host: e.URL.Host,
Path: routePath.Path,
}, nil
}
// V2 Provenance POC
func (r *Session) GetV2Version(token []string) (*RegistryInfo, error) {
if r.indexEndpoint.Version != APIVersion2 {
return nil, ErrIncorrectAPIVersion
}
routeURL, err := getV2URL(r.indexEndpoint, routes.VersionRoutename, nil)
if err != nil {
return nil, err
}
method := "GET"
log.Printf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
if err != nil {
return nil, err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
return nil, utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d fetching Version", res.StatusCode), res)
}
decoder := json.NewDecoder(res.Body)
versionInfo := new(RegistryInfo)
err = decoder.Decode(versionInfo)
if err != nil {
return nil, fmt.Errorf("unable to decode GetV2Version JSON response: %s", err)
}
return versionInfo, nil
}
//
// 1) Check if TarSum of each layer exists /v2/
// 1.a) if 200, continue
// 1.b) if 300, then push the
// 1.c) if anything else, err
// 2) PUT the created/signed manifest
//
func (r *Session) GetV2ImageManifest(imageName, tagName string, token []string) ([]byte, error) {
if r.indexEndpoint.Version != APIVersion2 {
return nil, ErrIncorrectAPIVersion
}
vars := map[string]string{
"imagename": imageName,
"tagname": tagName,
}
routeURL, err := getV2URL(r.indexEndpoint, routes.ManifestsRouteName, vars)
if err != nil {
return nil, err
}
method := "GET"
log.Printf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
if err != nil {
return nil, err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
if res.StatusCode == 401 {
return nil, errLoginRequired
}
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 buf, nil
}
// - Succeeded to mount for this image scope
// - Failed with no error (So continue to Push the Blob)
// - Failed with error
func (r *Session) PostV2ImageMountBlob(imageName, sumType, sum string, token []string) (bool, error) {
if r.indexEndpoint.Version != APIVersion2 {
return false, ErrIncorrectAPIVersion
}
vars := map[string]string{
"imagename": imageName,
"sumtype": sumType,
"sum": sum,
}
routeURL, err := getV2URL(r.indexEndpoint, routes.MountBlobRouteName, vars)
if err != nil {
return false, err
}
method := "POST"
log.Printf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), nil)
if err != nil {
return false, err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return false, err
}
res.Body.Close() // close early, since we're not needing a body on this call .. yet?
switch res.StatusCode {
case 200:
// return something indicating no push needed
return true, nil
case 300:
// return something indicating blob push needed
return false, nil
}
return false, fmt.Errorf("Failed to mount %q - %s:%s : %d", imageName, sumType, sum, res.StatusCode)
}
// 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(imageName, sumType string, blobRdr io.Reader, token []string) (serverChecksum string, err error) {
if r.indexEndpoint.Version != APIVersion2 {
return "", ErrIncorrectAPIVersion
}
vars := map[string]string{
"imagename": imageName,
"sumtype": sumType,
}
routeURL, err := getV2URL(r.indexEndpoint, routes.UploadBlobRouteName, vars)
if err != nil {
return "", err
}
method := "PUT"
log.Printf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), blobRdr)
if err != nil {
return "", err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return "", err
}
defer res.Body.Close()
if res.StatusCode != 201 {
if res.StatusCode == 401 {
return "", errLoginRequired
}
return "", utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to push %s blob", res.StatusCode, imageName), res)
}
type sumReturn struct {
Checksum string `json:"checksum"`
}
decoder := json.NewDecoder(res.Body)
var sumInfo sumReturn
err = decoder.Decode(&sumInfo)
if err != nil {
return "", fmt.Errorf("unable to decode PutV2ImageBlob JSON response: %s", err)
}
// XXX this is a json struct from the registry, with its checksum
return sumInfo.Checksum, nil
}
// Finally Push the (signed) manifest of the blobs we've just pushed
func (r *Session) PutV2ImageManifest(imageName, tagName string, manifestRdr io.Reader, token []string) error {
if r.indexEndpoint.Version != APIVersion2 {
return ErrIncorrectAPIVersion
}
vars := map[string]string{
"imagename": imageName,
"tagname": tagName,
}
routeURL, err := getV2URL(r.indexEndpoint, routes.ManifestsRouteName, vars)
if err != nil {
return err
}
method := "PUT"
log.Printf("[registry] Calling %q %s", method, routeURL.String())
req, err := r.reqFactory.NewRequest(method, routeURL.String(), manifestRdr)
if err != nil {
return err
}
setTokenAuth(req, token)
res, _, err := r.doRequest(req)
if err != nil {
return err
}
res.Body.Close()
if res.StatusCode != 201 {
if res.StatusCode == 401 {
return errLoginRequired
}
return utils.NewHTTPRequestError(fmt.Sprintf("Server error: %d trying to push %s:%s manifest", res.StatusCode, imageName, tagName), res)
}
return nil
}