mirror of https://github.com/k3s-io/k3s
77 lines
2.6 KiB
Go
77 lines
2.6 KiB
Go
/*
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Copyright 2017 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 discovery
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import (
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"net/http"
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"github.com/emicklei/go-restful"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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utilnet "k8s.io/apimachinery/pkg/util/net"
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"k8s.io/apiserver/pkg/endpoints/handlers/negotiation"
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"k8s.io/apiserver/pkg/endpoints/handlers/responsewriters"
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)
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// legacyRootAPIHandler creates a webservice serving api group discovery.
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type legacyRootAPIHandler struct {
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// addresses is used to build cluster IPs for discovery.
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addresses Addresses
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apiPrefix string
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serializer runtime.NegotiatedSerializer
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}
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func NewLegacyRootAPIHandler(addresses Addresses, serializer runtime.NegotiatedSerializer, apiPrefix string) *legacyRootAPIHandler {
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// Because in release 1.1, /apis returns response with empty APIVersion, we
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// use stripVersionNegotiatedSerializer to keep the response backwards
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// compatible.
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serializer = stripVersionNegotiatedSerializer{serializer}
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return &legacyRootAPIHandler{
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addresses: addresses,
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apiPrefix: apiPrefix,
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serializer: serializer,
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}
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}
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// AddApiWebService adds a service to return the supported api versions at the legacy /api.
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func (s *legacyRootAPIHandler) WebService() *restful.WebService {
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mediaTypes, _ := negotiation.MediaTypesForSerializer(s.serializer)
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ws := new(restful.WebService)
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ws.Path(s.apiPrefix)
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ws.Doc("get available API versions")
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ws.Route(ws.GET("/").To(s.handle).
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Doc("get available API versions").
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Operation("getAPIVersions").
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Produces(mediaTypes...).
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Consumes(mediaTypes...).
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Writes(metav1.APIVersions{}))
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return ws
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}
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func (s *legacyRootAPIHandler) handle(req *restful.Request, resp *restful.Response) {
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clientIP := utilnet.GetClientIP(req.Request)
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apiVersions := &metav1.APIVersions{
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ServerAddressByClientCIDRs: s.addresses.ServerAddressByClientCIDRs(clientIP),
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Versions: []string{"v1"},
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}
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responsewriters.WriteObjectNegotiated(s.serializer, negotiation.DefaultEndpointRestrictions, schema.GroupVersion{}, resp.ResponseWriter, req.Request, http.StatusOK, apiVersions)
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}
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