package registry import ( "encoding/json" "net/http" "github.com/docker/docker-registry/storage" "github.com/gorilla/handlers" ) // tagsDispatcher constructs the tags handler api endpoint. func tagsDispatcher(ctx *Context, r *http.Request) http.Handler { tagsHandler := &tagsHandler{ Context: ctx, } return handlers.MethodHandler{ "GET": http.HandlerFunc(tagsHandler.GetTags), } } // tagsHandler handles requests for lists of tags under a repository name. type tagsHandler struct { *Context } type tagsAPIResponse struct { Name string `json:"name"` Tags []string `json:"tags"` } // GetTags returns a json list of tags for a specific image name. func (th *tagsHandler) GetTags(w http.ResponseWriter, r *http.Request) { defer r.Body.Close() manifests := th.services.Manifests() tags, err := manifests.Tags(th.Name) if err != nil { switch err := err.(type) { case storage.ErrUnknownRepository: w.WriteHeader(404) th.Errors.Push(ErrorCodeUnknownRepository, map[string]string{"name": th.Name}) default: th.Errors.PushErr(err) } return } enc := json.NewEncoder(w) if err := enc.Encode(tagsAPIResponse{ Name: th.Name, Tags: tags, }); err != nil { th.Errors.PushErr(err) return } }