package registry import ( "encoding/json" "fmt" "net/http" "github.com/docker/distribution/api/v2" "github.com/docker/distribution/digest" "github.com/docker/distribution/storage" "github.com/gorilla/handlers" ) // imageManifestDispatcher takes the request context and builds the // appropriate handler for handling image manifest requests. func imageManifestDispatcher(ctx *Context, r *http.Request) http.Handler { imageManifestHandler := &imageManifestHandler{ Context: ctx, Tag: ctx.vars["tag"], } imageManifestHandler.log = imageManifestHandler.log.WithField("tag", imageManifestHandler.Tag) return handlers.MethodHandler{ "GET": http.HandlerFunc(imageManifestHandler.GetImageManifest), "PUT": http.HandlerFunc(imageManifestHandler.PutImageManifest), "DELETE": http.HandlerFunc(imageManifestHandler.DeleteImageManifest), } } // imageManifestHandler handles http operations on image manifests. type imageManifestHandler struct { *Context Tag string } // GetImageManifest fetches the image manifest from the storage backend, if it exists. func (imh *imageManifestHandler) GetImageManifest(w http.ResponseWriter, r *http.Request) { manifests := imh.services.Manifests() manifest, err := manifests.Get(imh.Name, imh.Tag) if err != nil { imh.Errors.Push(v2.ErrorCodeManifestUnknown, err) w.WriteHeader(http.StatusNotFound) return } w.Header().Set("Content-Type", "application/json") w.Header().Set("Content-Length", fmt.Sprint(len(manifest.Raw))) w.Write(manifest.Raw) } // PutImageManifest validates and stores and image in the registry. func (imh *imageManifestHandler) PutImageManifest(w http.ResponseWriter, r *http.Request) { manifests := imh.services.Manifests() dec := json.NewDecoder(r.Body) var manifest storage.SignedManifest if err := dec.Decode(&manifest); err != nil { imh.Errors.Push(v2.ErrorCodeManifestInvalid, err) w.WriteHeader(http.StatusBadRequest) return } if err := manifests.Put(imh.Name, imh.Tag, &manifest); err != nil { // TODO(stevvooe): These error handling switches really need to be // handled by an app global mapper. switch err := err.(type) { case storage.ErrManifestVerification: for _, verificationError := range err { switch verificationError := verificationError.(type) { case storage.ErrUnknownLayer: imh.Errors.Push(v2.ErrorCodeBlobUnknown, verificationError.FSLayer) case storage.ErrManifestUnverified: imh.Errors.Push(v2.ErrorCodeManifestUnverified) default: if verificationError == digest.ErrDigestInvalidFormat { // TODO(stevvooe): We need to really need to move all // errors to types. Its much more straightforward. imh.Errors.Push(v2.ErrorCodeDigestInvalid) } else { imh.Errors.PushErr(verificationError) } } } default: imh.Errors.PushErr(err) } w.WriteHeader(http.StatusBadRequest) return } } // DeleteImageManifest removes the image with the given tag from the registry. func (imh *imageManifestHandler) DeleteImageManifest(w http.ResponseWriter, r *http.Request) { manifests := imh.services.Manifests() if err := manifests.Delete(imh.Name, imh.Tag); err != nil { switch err := err.(type) { case storage.ErrUnknownManifest: imh.Errors.Push(v2.ErrorCodeManifestUnknown, err) w.WriteHeader(http.StatusNotFound) default: imh.Errors.Push(v2.ErrorCodeUnknown, err) w.WriteHeader(http.StatusBadRequest) } return } w.Header().Set("Content-Length", "0") w.WriteHeader(http.StatusAccepted) }