harbor/utils/registry/registry.go

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/*
Copyright (c) 2016 VMware, Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package registry
import (
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"encoding/json"
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"fmt"
"io/ioutil"
"net/http"
"net/url"
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"github.com/docker/distribution/manifest"
"github.com/docker/distribution/manifest/schema1"
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"github.com/docker/distribution/manifest/schema2"
"github.com/vmware/harbor/utils/registry/errors"
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)
// Registry holds information of a registry entiry
type Registry struct {
Endpoint *url.URL
client *http.Client
ub *uRLBuilder
}
type uRLBuilder struct {
root *url.URL
}
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var (
// ManifestVersion1 : schema 1
ManifestVersion1 = manifest.Versioned{
SchemaVersion: 1,
MediaType: schema1.MediaTypeManifest,
}
// ManifestVersion2 : schema 2
ManifestVersion2 = manifest.Versioned{
SchemaVersion: 2,
MediaType: schema2.MediaTypeManifest,
}
)
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// New returns an instance of Registry
func New(endpoint string, client *http.Client) (*Registry, error) {
u, err := url.Parse(endpoint)
if err != nil {
return nil, err
}
return &Registry{
Endpoint: u,
client: client,
ub: &uRLBuilder{
root: u,
},
}, nil
}
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// Catalog ...
func (r *Registry) Catalog() ([]string, error) {
repos := []string{}
req, err := http.NewRequest("GET", r.ub.buildCatalogURL(), nil)
if err != nil {
return repos, err
}
resp, err := r.client.Do(req)
if err != nil {
return repos, err
}
defer resp.Body.Close()
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return repos, err
}
if resp.StatusCode == http.StatusOK {
catalogResp := struct {
Repositories []string `json:"repositories"`
}{}
if err := json.Unmarshal(b, &catalogResp); err != nil {
return repos, err
}
repos = catalogResp.Repositories
return repos, nil
}
return repos, errors.Error{
StatusCode: resp.StatusCode,
Message: string(b),
}
}
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// ListTag ...
func (r *Registry) ListTag(name string) ([]string, error) {
tags := []string{}
req, err := http.NewRequest("GET", r.ub.buildTagListURL(name), nil)
if err != nil {
return tags, err
}
resp, err := r.client.Do(req)
if err != nil {
return tags, err
}
defer resp.Body.Close()
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return tags, err
}
if resp.StatusCode == http.StatusOK {
tagsResp := struct {
Tags []string `json:"tags"`
}{}
if err := json.Unmarshal(b, &tagsResp); err != nil {
return tags, err
}
tags = tagsResp.Tags
return tags, nil
}
return tags, errors.Error{
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StatusCode: resp.StatusCode,
Message: string(b),
}
}
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// ManifestExist ...
func (r *Registry) ManifestExist(name, reference string) (digest string, exist bool, err error) {
req, err := http.NewRequest("HEAD", r.ub.buildManifestURL(name, reference), nil)
if err != nil {
return
}
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// request Schema 2 manifest, if the registry does not support it,
// Schema 1 manifest will be returned
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req.Header.Set(http.CanonicalHeaderKey("Accept"), schema2.MediaTypeManifest)
resp, err := r.client.Do(req)
if err != nil {
return
}
if resp.StatusCode == http.StatusOK {
exist = true
digest = resp.Header.Get(http.CanonicalHeaderKey("Docker-Content-Digest"))
return
}
if resp.StatusCode == http.StatusNotFound {
return
}
defer resp.Body.Close()
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b, err := ioutil.ReadAll(resp.Body)
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if err != nil {
return
}
err = errors.Error{
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StatusCode: resp.StatusCode,
Message: string(b),
}
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return
}
// PullManifest ...
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func (r *Registry) PullManifest(name, reference string, version manifest.Versioned) (digest, mediaType string, payload []byte, err error) {
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req, err := http.NewRequest("GET", r.ub.buildManifestURL(name, reference), nil)
if err != nil {
return
}
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// if the registry does not support schema 2, schema 1 manifest will be returned
req.Header.Set(http.CanonicalHeaderKey("Accept"), version.MediaType)
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resp, err := r.client.Do(req)
if err != nil {
return
}
defer resp.Body.Close()
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b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return
}
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if resp.StatusCode == http.StatusOK {
digest = resp.Header.Get(http.CanonicalHeaderKey("Docker-Content-Digest"))
mediaType = resp.Header.Get(http.CanonicalHeaderKey("Content-Type"))
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payload = b
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return
}
err = errors.Error{
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StatusCode: resp.StatusCode,
Message: string(b),
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}
return
}
// DeleteManifest ...
func (r *Registry) DeleteManifest(name, digest string) error {
req, err := http.NewRequest("DELETE", r.ub.buildManifestURL(name, digest), nil)
if err != nil {
return err
}
resp, err := r.client.Do(req)
if err != nil {
return err
}
if resp.StatusCode == http.StatusAccepted {
return nil
}
defer resp.Body.Close()
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b, err := ioutil.ReadAll(resp.Body)
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if err != nil {
return err
}
return errors.Error{
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StatusCode: resp.StatusCode,
Message: string(b),
}
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}
// DeleteTag ...
func (r *Registry) DeleteTag(name, tag string) error {
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digest, exist, err := r.ManifestExist(name, tag)
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if err != nil {
return err
}
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if !exist {
return errors.Error{
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StatusCode: http.StatusNotFound,
}
}
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return r.DeleteManifest(name, digest)
}
// DeleteBlob ...
func (r *Registry) DeleteBlob(name, digest string) error {
req, err := http.NewRequest("DELETE", r.ub.buildBlobURL(name, digest), nil)
if err != nil {
return err
}
resp, err := r.client.Do(req)
if err != nil {
return err
}
if resp.StatusCode == http.StatusAccepted {
return nil
}
defer resp.Body.Close()
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b, err := ioutil.ReadAll(resp.Body)
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if err != nil {
return err
}
return errors.Error{
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StatusCode: resp.StatusCode,
Message: string(b),
}
}
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func (u *uRLBuilder) buildCatalogURL() string {
return fmt.Sprintf("%s/v2/_catalog", u.root.String())
}
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func (u *uRLBuilder) buildTagListURL(name string) string {
return fmt.Sprintf("%s/v2/%s/tags/list", u.root.String(), name)
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}
func (u *uRLBuilder) buildManifestURL(name, reference string) string {
return fmt.Sprintf("%s/v2/%s/manifests/%s", u.root.String(), name, reference)
}
func (u *uRLBuilder) buildBlobURL(name, reference string) string {
return fmt.Sprintf("%s/v2/%s/blobs/%s", u.root.String(), name, reference)
}