distribution/registry/client/repository.go

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package client
import (
"bytes"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"strconv"
"time"
"github.com/docker/distribution/manifest"
"github.com/docker/distribution/digest"
"github.com/docker/distribution"
"github.com/docker/distribution/context"
"github.com/docker/distribution/registry/api/v2"
"github.com/docker/distribution/registry/storage/cache"
)
// NewRepository creates a new Repository for the given repository name and endpoint
func NewRepository(ctx context.Context, name, endpoint string, transport http.RoundTripper) (distribution.Repository, error) {
if err := v2.ValidateRespositoryName(name); err != nil {
return nil, err
}
ub, err := v2.NewURLBuilderFromString(endpoint)
if err != nil {
return nil, err
}
client := &http.Client{
Transport: transport,
Timeout: 1 * time.Minute,
// TODO(dmcgowan): create cookie jar
}
return &repository{
client: client,
ub: ub,
name: name,
context: ctx,
}, nil
}
type repository struct {
client *http.Client
ub *v2.URLBuilder
context context.Context
name string
}
func (r *repository) Name() string {
return r.name
}
func (r *repository) Blobs(ctx context.Context) distribution.BlobStore {
statter := &blobStatter{
repository: r,
}
return &blobs{
repository: r,
statter: cache.NewCachedBlobStatter(cache.NewInMemoryBlobDescriptorCacheProvider(), statter),
}
}
func (r *repository) Manifests() distribution.ManifestService {
return &manifests{
repository: r,
}
}
func (r *repository) Signatures() distribution.SignatureService {
return &signatures{
repository: r,
}
}
type signatures struct {
*repository
}
func (s *signatures) Get(dgst digest.Digest) ([][]byte, error) {
panic("not implemented")
}
func (s *signatures) Put(dgst digest.Digest, signatures ...[]byte) error {
panic("not implemented")
}
type manifests struct {
*repository
}
func (ms *manifests) Tags() ([]string, error) {
u, err := ms.ub.BuildTagsURL(ms.name)
if err != nil {
return nil, err
}
resp, err := ms.client.Get(u)
if err != nil {
return nil, err
}
defer resp.Body.Close()
switch {
case resp.StatusCode == http.StatusOK:
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
tagsResponse := struct {
Tags []string `json:"tags"`
}{}
if err := json.Unmarshal(b, &tagsResponse); err != nil {
return nil, err
}
return tagsResponse.Tags, nil
case resp.StatusCode == http.StatusNotFound:
return nil, nil
default:
return nil, handleErrorResponse(resp)
}
}
func (ms *manifests) Exists(dgst digest.Digest) (bool, error) {
return ms.ExistsByTag(dgst.String())
}
func (ms *manifests) ExistsByTag(tag string) (bool, error) {
u, err := ms.ub.BuildManifestURL(ms.name, tag)
if err != nil {
return false, err
}
resp, err := ms.client.Head(u)
if err != nil {
return false, err
}
switch {
case resp.StatusCode == http.StatusOK:
return true, nil
case resp.StatusCode == http.StatusNotFound:
return false, nil
default:
return false, handleErrorResponse(resp)
}
}
func (ms *manifests) Get(dgst digest.Digest) (*manifest.SignedManifest, error) {
return ms.GetByTag(dgst.String())
}
func (ms *manifests) GetByTag(tag string) (*manifest.SignedManifest, error) {
u, err := ms.ub.BuildManifestURL(ms.name, tag)
if err != nil {
return nil, err
}
resp, err := ms.client.Get(u)
if err != nil {
return nil, err
}
defer resp.Body.Close()
switch {
case resp.StatusCode == http.StatusOK:
var sm manifest.SignedManifest
decoder := json.NewDecoder(resp.Body)
if err := decoder.Decode(&sm); err != nil {
return nil, err
}
return &sm, nil
default:
return nil, handleErrorResponse(resp)
}
}
func (ms *manifests) Put(m *manifest.SignedManifest) error {
manifestURL, err := ms.ub.BuildManifestURL(ms.name, m.Tag)
if err != nil {
return err
}
putRequest, err := http.NewRequest("PUT", manifestURL, bytes.NewReader(m.Raw))
if err != nil {
return err
}
resp, err := ms.client.Do(putRequest)
if err != nil {
return err
}
defer resp.Body.Close()
switch {
case resp.StatusCode == http.StatusAccepted:
// TODO(dmcgowan): Use or check digest header
return nil
default:
return handleErrorResponse(resp)
}
}
func (ms *manifests) Delete(dgst digest.Digest) error {
u, err := ms.ub.BuildManifestURL(ms.name, dgst.String())
if err != nil {
return err
}
req, err := http.NewRequest("DELETE", u, nil)
if err != nil {
return err
}
resp, err := ms.client.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
switch {
case resp.StatusCode == http.StatusOK:
return nil
default:
return handleErrorResponse(resp)
}
}
type blobs struct {
*repository
statter distribution.BlobStatter
}
func sanitizeLocation(location, source string) (string, error) {
locationURL, err := url.Parse(location)
if err != nil {
return "", err
}
if locationURL.Scheme == "" {
sourceURL, err := url.Parse(source)
if err != nil {
return "", err
}
locationURL = &url.URL{
Scheme: sourceURL.Scheme,
Host: sourceURL.Host,
Path: location,
}
location = locationURL.String()
}
return location, nil
}
func (ls *blobs) Stat(ctx context.Context, dgst digest.Digest) (distribution.Descriptor, error) {
return ls.statter.Stat(ctx, dgst)
}
func (ls *blobs) Get(ctx context.Context, dgst digest.Digest) ([]byte, error) {
desc, err := ls.Stat(ctx, dgst)
if err != nil {
return nil, err
}
reader, err := ls.Open(ctx, desc.Digest)
if err != nil {
return nil, err
}
defer reader.Close()
return ioutil.ReadAll(reader)
}
func (ls *blobs) Open(ctx context.Context, dgst digest.Digest) (distribution.ReadSeekCloser, error) {
stat, err := ls.statter.Stat(ctx, dgst)
if err != nil {
return nil, err
}
blobURL, err := ls.ub.BuildBlobURL(ls.Name(), stat.Digest)
if err != nil {
return nil, err
}
return NewHTTPReadSeeker(ls.repository.client, blobURL, stat.Length), nil
}
func (ls *blobs) ServeBlob(ctx context.Context, w http.ResponseWriter, r *http.Request, dgst digest.Digest) error {
return nil
}
func (ls *blobs) Put(ctx context.Context, mediaType string, p []byte) (distribution.Descriptor, error) {
writer, err := ls.Create(ctx)
if err != nil {
return distribution.Descriptor{}, err
}
dgstr := digest.NewCanonicalDigester()
n, err := io.Copy(writer, io.TeeReader(bytes.NewReader(p), dgstr))
if err != nil {
return distribution.Descriptor{}, err
}
if n < int64(len(p)) {
return distribution.Descriptor{}, fmt.Errorf("short copy: wrote %d of %d", n, len(p))
}
desc := distribution.Descriptor{
MediaType: mediaType,
Length: int64(len(p)),
Digest: dgstr.Digest(),
}
return writer.Commit(ctx, desc)
}
func (ls *blobs) Create(ctx context.Context) (distribution.BlobWriter, error) {
u, err := ls.ub.BuildBlobUploadURL(ls.name)
resp, err := ls.client.Post(u, "", nil)
if err != nil {
return nil, err
}
defer resp.Body.Close()
switch {
case resp.StatusCode == http.StatusAccepted:
// TODO(dmcgowan): Check for invalid UUID
uuid := resp.Header.Get("Docker-Upload-UUID")
location, err := sanitizeLocation(resp.Header.Get("Location"), u)
if err != nil {
return nil, err
}
return &httpBlobUpload{
repo: ls.repository,
client: ls.client,
uuid: uuid,
startedAt: time.Now(),
location: location,
}, nil
default:
return nil, handleErrorResponse(resp)
}
}
func (ls *blobs) Resume(ctx context.Context, id string) (distribution.BlobWriter, error) {
panic("not implemented")
}
type blobStatter struct {
*repository
}
func (ls *blobStatter) Stat(ctx context.Context, dgst digest.Digest) (distribution.Descriptor, error) {
u, err := ls.ub.BuildBlobURL(ls.name, dgst)
if err != nil {
return distribution.Descriptor{}, err
}
resp, err := ls.client.Head(u)
if err != nil {
return distribution.Descriptor{}, err
}
defer resp.Body.Close()
switch {
case resp.StatusCode == http.StatusOK:
lengthHeader := resp.Header.Get("Content-Length")
length, err := strconv.ParseInt(lengthHeader, 10, 64)
if err != nil {
return distribution.Descriptor{}, fmt.Errorf("error parsing content-length: %v", err)
}
return distribution.Descriptor{
MediaType: resp.Header.Get("Content-Type"),
Length: length,
Digest: dgst,
}, nil
case resp.StatusCode == http.StatusNotFound:
return distribution.Descriptor{}, distribution.ErrBlobUnknown
default:
return distribution.Descriptor{}, handleErrorResponse(resp)
}
}