K8s: Add apimachinery and apiserver packages (#83190)

2024-02-23 15:15:43 -05:00
parent f4b432841b
commit e5a26a3f7c
84 changed files with 701 additions and 1020 deletions
@@ -1,115 +0,0 @@
-package builder
-
-import (
-	"fmt"
-	"net/http"
-
-	"github.com/gorilla/mux"
-	restclient "k8s.io/client-go/rest"
-	"k8s.io/kube-openapi/pkg/spec3"
-)
-
-type requestHandler struct {
-	router *mux.Router
-}
-
-func getAPIHandler(delegateHandler http.Handler, restConfig *restclient.Config, builders []APIGroupBuilder) (http.Handler, error) {
-	useful := false // only true if any routes exist anywhere
-	router := mux.NewRouter()
-
-	for _, builder := range builders {
-		routes := builder.GetAPIRoutes()
-		if routes == nil {
-			continue
-		}
-
-		gv := builder.GetGroupVersion()
-		prefix := "/apis/" + gv.String()
-
-		// Root handlers
-		var sub *mux.Router
-		for _, route := range routes.Root {
-			if sub == nil {
-				sub = router.PathPrefix(prefix).Subrouter()
-				sub.MethodNotAllowedHandler = &methodNotAllowedHandler{}
-			}
-
-			useful = true
-			methods, err := methodsFromSpec(route.Path, route.Spec)
-			if err != nil {
-				return nil, err
-			}
-			sub.HandleFunc("/"+route.Path, route.Handler).
-				Methods(methods...)
-		}
-
-		// Namespace handlers
-		sub = nil
-		prefix += "/namespaces/{namespace}"
-		for _, route := range routes.Namespace {
-			if sub == nil {
-				sub = router.PathPrefix(prefix).Subrouter()
-				sub.MethodNotAllowedHandler = &methodNotAllowedHandler{}
-			}
-
-			useful = true
-			methods, err := methodsFromSpec(route.Path, route.Spec)
-			if err != nil {
-				return nil, err
-			}
-			sub.HandleFunc("/"+route.Path, route.Handler).
-				Methods(methods...)
-		}
-	}
-
-	if !useful {
-		return delegateHandler, nil
-	}
-
-	// Per Gorilla Mux issue here: https://github.com/gorilla/mux/issues/616#issuecomment-798807509
-	// default handler must come last
-	router.PathPrefix("/").Handler(delegateHandler)
-
-	return &requestHandler{
-		router: router,
-	}, nil
-}
-
-func (h *requestHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
-	h.router.ServeHTTP(w, req)
-}
-
-func methodsFromSpec(slug string, props *spec3.PathProps) ([]string, error) {
-	if props == nil {
-		return []string{"GET", "POST", "PUT", "PATCH", "DELETE"}, nil
-	}
-
-	methods := make([]string, 0)
-	if props.Get != nil {
-		methods = append(methods, "GET")
-	}
-	if props.Post != nil {
-		methods = append(methods, "POST")
-	}
-	if props.Put != nil {
-		methods = append(methods, "PUT")
-	}
-	if props.Patch != nil {
-		methods = append(methods, "PATCH")
-	}
-	if props.Delete != nil {
-		methods = append(methods, "DELETE")
-	}
-
-	if len(methods) == 0 {
-		return nil, fmt.Errorf("invalid OpenAPI Spec for slug=%s without any methods in PathProps", slug)
-	}
-
-	return methods, nil
-}
-
-type methodNotAllowedHandler struct{}
-
-func (h *methodNotAllowedHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
-	w.WriteHeader(405) // method not allowed
-}