distribution/api/urls/urls.go

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package registry
import (
"net/http"
"net/url"
"github.com/docker/docker-registry/api/urls"
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"github.com/docker/docker-registry/digest"
"github.com/docker/docker-registry/storage"
"github.com/gorilla/mux"
)
type urlBuilder struct {
url *url.URL // url root (ie http://localhost/)
router *mux.Router
}
func newURLBuilder(root *url.URL) *urlBuilder {
return &urlBuilder{
url: root,
router: urls.Router(),
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}
}
func newURLBuilderFromRequest(r *http.Request) *urlBuilder {
u := &url.URL{
Scheme: r.URL.Scheme,
Host: r.Host,
}
return newURLBuilder(u)
}
func newURLBuilderFromString(root string) (*urlBuilder, error) {
u, err := url.Parse(root)
if err != nil {
return nil, err
}
return newURLBuilder(u), nil
}
func (ub *urlBuilder) buildBaseURL() (string, error) {
route := clonedRoute(ub.router, urls.RouteNameBase)
baseURL, err := route.
Schemes(ub.url.Scheme).
Host(ub.url.Host).
URL()
if err != nil {
return "", err
}
return baseURL.String(), nil
}
func (ub *urlBuilder) buildTagsURL(name string) (string, error) {
route := clonedRoute(ub.router, urls.RouteNameTags)
tagsURL, err := route.
Schemes(ub.url.Scheme).
Host(ub.url.Host).
URL("name", name)
if err != nil {
return "", err
}
return tagsURL.String(), nil
}
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func (ub *urlBuilder) forManifest(m *storage.Manifest) (string, error) {
return ub.buildManifestURL(m.Name, m.Tag)
}
func (ub *urlBuilder) buildManifestURL(name, tag string) (string, error) {
route := clonedRoute(ub.router, urls.RouteNameManifest)
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manifestURL, err := route.
Schemes(ub.url.Scheme).
Host(ub.url.Host).
URL("name", name, "tag", tag)
if err != nil {
return "", err
}
return manifestURL.String(), nil
}
func (ub *urlBuilder) forLayer(l storage.Layer) (string, error) {
return ub.buildLayerURL(l.Name(), l.Digest())
}
func (ub *urlBuilder) buildLayerURL(name string, dgst digest.Digest) (string, error) {
route := clonedRoute(ub.router, urls.RouteNameBlob)
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layerURL, err := route.
Schemes(ub.url.Scheme).
Host(ub.url.Host).
URL("name", name, "digest", dgst.String())
if err != nil {
return "", err
}
return layerURL.String(), nil
}
func (ub *urlBuilder) buildLayerUploadURL(name string) (string, error) {
route := clonedRoute(ub.router, urls.RouteNameBlobUpload)
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uploadURL, err := route.
Schemes(ub.url.Scheme).
Host(ub.url.Host).
URL("name", name)
if err != nil {
return "", err
}
return uploadURL.String(), nil
}
func (ub *urlBuilder) forLayerUpload(layerUpload storage.LayerUpload) (string, error) {
return ub.buildLayerUploadResumeURL(layerUpload.Name(), layerUpload.UUID())
}
func (ub *urlBuilder) buildLayerUploadResumeURL(name, uuid string, values ...url.Values) (string, error) {
route := clonedRoute(ub.router, urls.RouteNameBlobUploadChunk)
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uploadURL, err := route.
Schemes(ub.url.Scheme).
Host(ub.url.Host).
URL("name", name, "uuid", uuid)
if err != nil {
return "", err
}
return appendValuesURL(uploadURL, values...).String(), nil
}
// appendValuesURL appends the parameters to the url.
func appendValuesURL(u *url.URL, values ...url.Values) *url.URL {
merged := u.Query()
for _, v := range values {
for k, vv := range v {
merged[k] = append(merged[k], vv...)
}
}
u.RawQuery = merged.Encode()
return u
}
// appendValues appends the parameters to the url. Panics if the string is not
// a url.
func appendValues(u string, values ...url.Values) string {
up, err := url.Parse(u)
if err != nil {
panic(err) // should never happen
}
return appendValuesURL(up, values...).String()
}
// clondedRoute returns a clone of the named route from the router.
func clonedRoute(router *mux.Router, name string) *mux.Route {
route := new(mux.Route)
*route = *router.GetRoute(name) // clone the route
return route
}