90216ce721
- move rest handler into handlers package - move errors into handlers/errors package - move negotation code into handlers/negotation package - move http response writer helpers into handlers/responsewriter package - split up pkg/apiserver/apiserver.go Note: this is only an intermediate step towards a proper genericapiserver package hierarchy.
96 lines
3.5 KiB
Go
96 lines
3.5 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package handlers
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import (
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"net/http"
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"strings"
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metav1 "k8s.io/kubernetes/pkg/apis/meta/v1"
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"k8s.io/kubernetes/pkg/apiserver/handlers/responsewriters"
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"k8s.io/kubernetes/pkg/runtime"
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"k8s.io/kubernetes/pkg/runtime/schema"
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"k8s.io/kubernetes/pkg/util/sets"
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utilversion "k8s.io/kubernetes/pkg/util/version"
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"github.com/emicklei/go-restful"
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)
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type APIResourceLister interface {
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ListAPIResources() []metav1.APIResource
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}
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// RootAPIHandler returns a handler which will list the provided groups and versions as available.
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func RootAPIHandler(s runtime.NegotiatedSerializer, f func(req *restful.Request) []metav1.APIGroup) restful.RouteFunction {
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return func(req *restful.Request, resp *restful.Response) {
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responsewriters.WriteObjectNegotiated(s, schema.GroupVersion{}, resp.ResponseWriter, req.Request, http.StatusOK, &metav1.APIGroupList{Groups: filterAPIGroups(req, f(req))})
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}
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}
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// GroupHandler returns a handler which will return the api.GroupAndVersion of
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// the group.
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func GroupHandler(s runtime.NegotiatedSerializer, group metav1.APIGroup) restful.RouteFunction {
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return func(req *restful.Request, resp *restful.Response) {
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responsewriters.WriteObjectNegotiated(s, schema.GroupVersion{}, resp.ResponseWriter, req.Request, http.StatusOK, &group)
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}
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}
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// SupportedResourcesHandler returns a handler which will list the provided resources as available.
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func SupportedResourcesHandler(s runtime.NegotiatedSerializer, groupVersion schema.GroupVersion, lister APIResourceLister) restful.RouteFunction {
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return func(req *restful.Request, resp *restful.Response) {
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responsewriters.WriteObjectNegotiated(s, schema.GroupVersion{}, resp.ResponseWriter, req.Request, http.StatusOK, &metav1.APIResourceList{GroupVersion: groupVersion.String(), APIResources: lister.ListAPIResources()})
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}
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}
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// TODO: Remove in 1.6. This is for backward compatibility with 1.4 kubectl.
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// See https://github.com/kubernetes/kubernetes/issues/35791
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var groupsWithNewVersionsIn1_5 = sets.NewString("apps", "policy")
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// TODO: Remove in 1.6.
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func filterAPIGroups(req *restful.Request, groups []metav1.APIGroup) []metav1.APIGroup {
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if !isOldKubectl(req.HeaderParameter("User-Agent")) {
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return groups
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}
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// hide API group that has new versions added in 1.5.
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var ret []metav1.APIGroup
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for _, group := range groups {
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if groupsWithNewVersionsIn1_5.Has(group.Name) {
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continue
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}
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ret = append(ret, group)
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}
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return ret
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}
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// TODO: Remove in 1.6. Returns if kubectl is older than v1.5.0
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func isOldKubectl(userAgent string) bool {
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// example userAgent string: kubectl-1.3/v1.3.8 (linux/amd64) kubernetes/e328d5b
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if !strings.Contains(userAgent, "kubectl") {
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return false
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}
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userAgent = strings.Split(userAgent, " ")[0]
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subs := strings.Split(userAgent, "/")
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if len(subs) != 2 {
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return false
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}
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kubectlVersion, versionErr := utilversion.ParseSemantic(subs[1])
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if versionErr != nil {
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return false
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}
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return kubectlVersion.LessThan(utilversion.MustParseSemantic("v1.5.0"))
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}
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