mirror of https://github.com/k3s-io/k3s
887 lines
32 KiB
Go
887 lines
32 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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 apiserver
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import (
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"fmt"
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"net/http"
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"net/url"
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gpath "path"
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"reflect"
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"sort"
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"strings"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/errors"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/meta"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/rest"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/conversion"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
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watchjson "github.com/GoogleCloudPlatform/kubernetes/pkg/watch/json"
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"github.com/emicklei/go-restful"
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)
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type APIInstaller struct {
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group *APIGroupVersion
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info *APIRequestInfoResolver
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prefix string // Path prefix where API resources are to be registered.
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}
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// Struct capturing information about an action ("GET", "POST", "WATCH", PROXY", etc).
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type action struct {
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Verb string // Verb identifying the action ("GET", "POST", "WATCH", PROXY", etc).
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Path string // The path of the action
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Params []*restful.Parameter // List of parameters associated with the action.
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Namer ScopeNamer
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}
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// errEmptyName is returned when API requests do not fill the name section of the path.
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var errEmptyName = errors.NewBadRequest("name must be provided")
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// Installs handlers for API resources.
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func (a *APIInstaller) Install() (ws *restful.WebService, errors []error) {
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errors = make([]error, 0)
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// Create the WebService.
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ws = a.newWebService()
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redirectHandler := (&RedirectHandler{a.group.Storage, a.group.Codec, a.group.Context, a.info})
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proxyHandler := (&ProxyHandler{a.prefix + "/proxy/", a.group.Storage, a.group.Codec, a.group.Context, a.info})
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// Register the paths in a deterministic (sorted) order to get a deterministic swagger spec.
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paths := make([]string, len(a.group.Storage))
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var i int = 0
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for path := range a.group.Storage {
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paths[i] = path
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i++
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}
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sort.Strings(paths)
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for _, path := range paths {
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if err := a.registerResourceHandlers(path, a.group.Storage[path], ws, redirectHandler, proxyHandler); err != nil {
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errors = append(errors, err)
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}
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}
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return ws, errors
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}
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func (a *APIInstaller) newWebService() *restful.WebService {
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ws := new(restful.WebService)
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ws.Path(a.prefix)
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ws.Doc("API at " + a.prefix + " version " + a.group.Version)
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// TODO: change to restful.MIME_JSON when we set content type in client
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ws.Consumes("*/*")
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ws.Produces(restful.MIME_JSON)
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ws.ApiVersion(a.group.Version)
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return ws
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}
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func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storage, ws *restful.WebService, redirectHandler, proxyHandler http.Handler) error {
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admit := a.group.Admit
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context := a.group.Context
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serverVersion := a.group.ServerVersion
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if len(serverVersion) == 0 {
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serverVersion = a.group.Version
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}
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var resource, subresource string
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switch parts := strings.Split(path, "/"); len(parts) {
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case 2:
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resource, subresource = parts[0], parts[1]
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case 1:
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resource = parts[0]
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default:
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// TODO: support deeper paths
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return fmt.Errorf("api_installer allows only one or two segment paths (resource or resource/subresource)")
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}
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hasSubresource := len(subresource) > 0
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object := storage.New()
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_, kind, err := a.group.Typer.ObjectVersionAndKind(object)
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if err != nil {
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return err
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}
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versionedPtr, err := a.group.Creater.New(a.group.Version, kind)
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if err != nil {
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return err
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}
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versionedObject := indirectArbitraryPointer(versionedPtr)
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mapping, err := a.group.Mapper.RESTMapping(kind, a.group.Version)
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if err != nil {
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return err
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}
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// subresources must have parent resources, and follow the namespacing rules of their parent
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if hasSubresource {
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parentStorage, ok := a.group.Storage[resource]
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if !ok {
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return fmt.Errorf("subresources can only be declared when the parent is also registered: %s needs %s", path, resource)
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}
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parentObject := parentStorage.New()
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_, parentKind, err := a.group.Typer.ObjectVersionAndKind(parentObject)
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if err != nil {
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return err
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}
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parentMapping, err := a.group.Mapper.RESTMapping(parentKind, a.group.Version)
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if err != nil {
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return err
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}
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mapping.Scope = parentMapping.Scope
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}
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// what verbs are supported by the storage, used to know what verbs we support per path
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creater, isCreater := storage.(rest.Creater)
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namedCreater, isNamedCreater := storage.(rest.NamedCreater)
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lister, isLister := storage.(rest.Lister)
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getter, isGetter := storage.(rest.Getter)
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getterWithOptions, isGetterWithOptions := storage.(rest.GetterWithOptions)
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deleter, isDeleter := storage.(rest.Deleter)
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gracefulDeleter, isGracefulDeleter := storage.(rest.GracefulDeleter)
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updater, isUpdater := storage.(rest.Updater)
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patcher, isPatcher := storage.(rest.Patcher)
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watcher, isWatcher := storage.(rest.Watcher)
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_, isRedirector := storage.(rest.Redirector)
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connecter, isConnecter := storage.(rest.Connecter)
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storageMeta, isMetadata := storage.(rest.StorageMetadata)
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if !isMetadata {
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storageMeta = defaultStorageMetadata{}
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}
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if isNamedCreater {
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isCreater = true
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}
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var versionedList interface{}
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if isLister {
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list := lister.NewList()
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_, listKind, err := a.group.Typer.ObjectVersionAndKind(list)
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versionedListPtr, err := a.group.Creater.New(a.group.Version, listKind)
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if err != nil {
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return err
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}
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versionedList = indirectArbitraryPointer(versionedListPtr)
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}
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versionedListOptions, err := a.group.Creater.New(serverVersion, "ListOptions")
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if err != nil {
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return err
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}
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var versionedDeleterObject interface{}
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switch {
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case isGracefulDeleter:
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objectPtr, err := a.group.Creater.New(serverVersion, "DeleteOptions")
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if err != nil {
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return err
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}
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versionedDeleterObject = indirectArbitraryPointer(objectPtr)
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isDeleter = true
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case isDeleter:
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gracefulDeleter = rest.GracefulDeleteAdapter{deleter}
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}
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versionedStatusPtr, err := a.group.Creater.New(serverVersion, "Status")
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if err != nil {
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return err
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}
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versionedStatus := indirectArbitraryPointer(versionedStatusPtr)
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var (
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getOptions runtime.Object
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getOptionsKind string
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getSubpath bool
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getSubpathKey string
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)
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if isGetterWithOptions {
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getOptions, getSubpath, getSubpathKey = getterWithOptions.NewGetOptions()
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_, getOptionsKind, err = a.group.Typer.ObjectVersionAndKind(getOptions)
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if err != nil {
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return err
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}
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isGetter = true
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}
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var (
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connectOptions runtime.Object
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connectOptionsKind string
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connectSubpath bool
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connectSubpathKey string
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)
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if isConnecter {
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connectOptions, connectSubpath, connectSubpathKey = connecter.NewConnectOptions()
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if connectOptions != nil {
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_, connectOptionsKind, err = a.group.Typer.ObjectVersionAndKind(connectOptions)
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if err != nil {
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return err
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}
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}
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}
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var ctxFn ContextFunc
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ctxFn = func(req *restful.Request) api.Context {
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if ctx, ok := context.Get(req.Request); ok {
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return ctx
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}
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return api.NewContext()
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}
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allowWatchList := isWatcher && isLister // watching on lists is allowed only for kinds that support both watch and list.
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scope := mapping.Scope
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nameParam := ws.PathParameter("name", "name of the "+kind).DataType("string")
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pathParam := ws.PathParameter("path:*", "path to the resource").DataType("string")
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params := []*restful.Parameter{}
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actions := []action{}
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// Get the list of actions for the given scope.
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if scope.Name() != meta.RESTScopeNameNamespace {
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resourcePath := resource
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resourceParams := params
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itemPath := resourcePath + "/{name}"
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nameParams := append(params, nameParam)
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proxyParams := append(nameParams, pathParam)
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if hasSubresource {
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itemPath = itemPath + "/" + subresource
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resourcePath = itemPath
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resourceParams = nameParams
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}
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namer := rootScopeNaming{scope, a.group.Linker, gpath.Join(a.prefix, itemPath)}
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// Handler for standard REST verbs (GET, PUT, POST and DELETE).
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actions = appendIf(actions, action{"LIST", resourcePath, resourceParams, namer}, isLister)
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actions = appendIf(actions, action{"POST", resourcePath, resourceParams, namer}, isCreater)
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actions = appendIf(actions, action{"WATCHLIST", "watch/" + resourcePath, resourceParams, namer}, allowWatchList)
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actions = appendIf(actions, action{"GET", itemPath, nameParams, namer}, isGetter)
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if getSubpath {
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actions = appendIf(actions, action{"GET", itemPath + "/{path:*}", proxyParams, namer}, isGetter)
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}
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actions = appendIf(actions, action{"PUT", itemPath, nameParams, namer}, isUpdater)
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actions = appendIf(actions, action{"PATCH", itemPath, nameParams, namer}, isPatcher)
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actions = appendIf(actions, action{"DELETE", itemPath, nameParams, namer}, isDeleter)
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actions = appendIf(actions, action{"WATCH", "watch/" + itemPath, nameParams, namer}, isWatcher)
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actions = appendIf(actions, action{"REDIRECT", "redirect/" + itemPath, nameParams, namer}, isRedirector)
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actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath + "/{path:*}", proxyParams, namer}, isRedirector)
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actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath, nameParams, namer}, isRedirector)
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actions = appendIf(actions, action{"CONNECT", itemPath, nameParams, namer}, isConnecter)
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actions = appendIf(actions, action{"CONNECT", itemPath + "/{path:*}", nameParams, namer}, isConnecter && connectSubpath)
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} else {
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// v1beta3 format with namespace in path
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if scope.ParamPath() {
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// Handler for standard REST verbs (GET, PUT, POST and DELETE).
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namespaceParam := ws.PathParameter(scope.ParamName(), scope.ParamDescription()).DataType("string")
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namespacedPath := scope.ParamName() + "/{" + scope.ParamName() + "}/" + resource
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namespaceParams := []*restful.Parameter{namespaceParam}
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resourcePath := namespacedPath
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resourceParams := namespaceParams
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itemPath := namespacedPath + "/{name}"
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nameParams := append(namespaceParams, nameParam)
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proxyParams := append(nameParams, pathParam)
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if hasSubresource {
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itemPath = itemPath + "/" + subresource
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resourcePath = itemPath
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resourceParams = nameParams
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}
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namer := scopeNaming{scope, a.group.Linker, gpath.Join(a.prefix, itemPath), false}
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actions = appendIf(actions, action{"LIST", resourcePath, resourceParams, namer}, isLister)
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actions = appendIf(actions, action{"POST", resourcePath, resourceParams, namer}, isCreater)
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// DEPRECATED
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actions = appendIf(actions, action{"WATCHLIST", "watch/" + resourcePath, resourceParams, namer}, allowWatchList)
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actions = appendIf(actions, action{"GET", itemPath, nameParams, namer}, isGetter)
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if getSubpath {
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actions = appendIf(actions, action{"GET", itemPath + "/{path:*}", proxyParams, namer}, isGetter)
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}
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actions = appendIf(actions, action{"PUT", itemPath, nameParams, namer}, isUpdater)
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actions = appendIf(actions, action{"PATCH", itemPath, nameParams, namer}, isPatcher)
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actions = appendIf(actions, action{"DELETE", itemPath, nameParams, namer}, isDeleter)
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actions = appendIf(actions, action{"WATCH", "watch/" + itemPath, nameParams, namer}, isWatcher)
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actions = appendIf(actions, action{"REDIRECT", "redirect/" + itemPath, nameParams, namer}, isRedirector)
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actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath + "/{path:*}", proxyParams, namer}, isRedirector)
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actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath, nameParams, namer}, isRedirector)
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actions = appendIf(actions, action{"CONNECT", itemPath, nameParams, namer}, isConnecter)
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actions = appendIf(actions, action{"CONNECT", itemPath + "/{path:*}", nameParams, namer}, isConnecter && connectSubpath)
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// list or post across namespace.
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// TODO: more strongly type whether a resource allows these actions on "all namespaces" (bulk delete)
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namer = scopeNaming{scope, a.group.Linker, gpath.Join(a.prefix, itemPath), true}
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actions = appendIf(actions, action{"LIST", resource, params, namer}, isLister)
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actions = appendIf(actions, action{"POST", resource, params, namer}, isCreater)
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actions = appendIf(actions, action{"WATCHLIST", "watch/" + resource, params, namer}, allowWatchList)
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} else {
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// Handler for standard REST verbs (GET, PUT, POST and DELETE).
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// v1beta1/v1beta2 format where namespace was a query parameter
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namespaceParam := ws.QueryParameter(scope.ParamName(), scope.ParamDescription()).DataType("string")
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namespaceParams := []*restful.Parameter{namespaceParam}
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basePath := resource
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resourcePath := basePath
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resourceParams := namespaceParams
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itemPath := resourcePath + "/{name}"
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nameParams := append(namespaceParams, nameParam)
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proxyParams := append(nameParams, pathParam)
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if hasSubresource {
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itemPath = itemPath + "/" + subresource
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resourcePath = itemPath
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resourceParams = nameParams
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}
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namer := legacyScopeNaming{scope, a.group.Linker, gpath.Join(a.prefix, itemPath)}
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actions = appendIf(actions, action{"LIST", resourcePath, resourceParams, namer}, isLister)
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actions = appendIf(actions, action{"POST", resourcePath, resourceParams, namer}, isCreater)
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actions = appendIf(actions, action{"WATCHLIST", "watch/" + resourcePath, resourceParams, namer}, allowWatchList)
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actions = appendIf(actions, action{"GET", itemPath, nameParams, namer}, isGetter)
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if getSubpath {
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actions = appendIf(actions, action{"GET", itemPath + "/{path:*}", proxyParams, namer}, isGetter)
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}
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actions = appendIf(actions, action{"PUT", itemPath, nameParams, namer}, isUpdater)
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actions = appendIf(actions, action{"PATCH", itemPath, nameParams, namer}, isPatcher)
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actions = appendIf(actions, action{"DELETE", itemPath, nameParams, namer}, isDeleter)
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actions = appendIf(actions, action{"WATCH", "watch/" + itemPath, nameParams, namer}, isWatcher)
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actions = appendIf(actions, action{"REDIRECT", "redirect/" + itemPath, nameParams, namer}, isRedirector)
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actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath + "/{path:*}", proxyParams, namer}, isRedirector)
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actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath, nameParams, namer}, isRedirector)
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actions = appendIf(actions, action{"CONNECT", itemPath, nameParams, namer}, isConnecter)
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actions = appendIf(actions, action{"CONNECT", itemPath + "/{path:*}", nameParams, namer}, isConnecter && connectSubpath)
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}
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}
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// Create Routes for the actions.
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// TODO: Add status documentation using Returns()
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// Errors (see api/errors/errors.go as well as go-restful router):
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// http.StatusNotFound, http.StatusMethodNotAllowed,
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// http.StatusUnsupportedMediaType, http.StatusNotAcceptable,
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// http.StatusBadRequest, http.StatusUnauthorized, http.StatusForbidden,
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// http.StatusRequestTimeout, http.StatusConflict, http.StatusPreconditionFailed,
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// 422 (StatusUnprocessableEntity), http.StatusInternalServerError,
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// http.StatusServiceUnavailable
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// and api error codes
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// Note that if we specify a versioned Status object here, we may need to
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// create one for the tests, also
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// Success:
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// http.StatusOK, http.StatusCreated, http.StatusAccepted, http.StatusNoContent
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//
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// test/integration/auth_test.go is currently the most comprehensive status code test
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reqScope := RequestScope{
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ContextFunc: ctxFn,
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Creater: a.group.Creater,
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Convertor: a.group.Convertor,
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Codec: mapping.Codec,
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APIVersion: a.group.Version,
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ServerAPIVersion: serverVersion,
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Resource: resource,
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Kind: kind,
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}
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for _, action := range actions {
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reqScope.Namer = action.Namer
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m := monitorFilter(action.Verb, resource)
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switch action.Verb {
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case "GET": // Get a resource.
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var handler restful.RouteFunction
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if isGetterWithOptions {
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handler = GetResourceWithOptions(getterWithOptions, reqScope, getOptionsKind, getSubpath, getSubpathKey)
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} else {
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handler = GetResource(getter, reqScope)
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}
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route := ws.GET(action.Path).To(handler).
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Filter(m).
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Doc("read the specified "+kind).
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Operation("read"+kind).
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Produces(append(storageMeta.ProducesMIMETypes(action.Verb), "application/json")...).
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Returns(http.StatusOK, "OK", versionedObject).
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Writes(versionedObject)
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if isGetterWithOptions {
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if err := addObjectParams(ws, route, getOptions); err != nil {
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return err
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}
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}
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addParams(route, action.Params)
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ws.Route(route)
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case "LIST": // List all resources of a kind.
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route := ws.GET(action.Path).To(ListResource(lister, watcher, reqScope, false)).
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Filter(m).
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Doc("list objects of kind "+kind).
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Operation("list"+kind).
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Produces("application/json").
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Returns(http.StatusOK, "OK", versionedList).
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Writes(versionedList)
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if err := addObjectParams(ws, route, versionedListOptions); err != nil {
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return err
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}
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switch {
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case isLister && isWatcher:
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route.Doc("list or watch objects of kind " + kind)
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case isWatcher:
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route.Doc("watch objects of kind " + kind)
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}
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addParams(route, action.Params)
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ws.Route(route)
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case "PUT": // Update a resource.
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route := ws.PUT(action.Path).To(UpdateResource(updater, reqScope, a.group.Typer, admit)).
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Filter(m).
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Doc("replace the specified "+kind).
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Operation("replace"+kind).
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Produces(append(storageMeta.ProducesMIMETypes(action.Verb), "application/json")...).
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Returns(http.StatusOK, "OK", versionedObject).
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Reads(versionedObject).
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Writes(versionedObject)
|
|
addParams(route, action.Params)
|
|
ws.Route(route)
|
|
case "PATCH": // Partially update a resource
|
|
route := ws.PATCH(action.Path).To(PatchResource(patcher, reqScope, a.group.Typer, admit, mapping.ObjectConvertor)).
|
|
Filter(m).
|
|
Doc("partially update the specified "+kind).
|
|
Consumes(string(api.JSONPatchType), string(api.MergePatchType), string(api.StrategicMergePatchType)).
|
|
Operation("patch"+kind).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), "application/json")...).
|
|
Returns(http.StatusOK, "OK", "string").
|
|
Reads("string").
|
|
Writes(versionedObject)
|
|
addParams(route, action.Params)
|
|
ws.Route(route)
|
|
case "POST": // Create a resource.
|
|
var handler restful.RouteFunction
|
|
if isNamedCreater {
|
|
handler = CreateNamedResource(namedCreater, reqScope, a.group.Typer, admit)
|
|
} else {
|
|
handler = CreateResource(creater, reqScope, a.group.Typer, admit)
|
|
}
|
|
route := ws.POST(action.Path).To(handler).
|
|
Filter(m).
|
|
Doc("create a "+kind).
|
|
Operation("create"+kind).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), "application/json")...).
|
|
Returns(http.StatusOK, "OK", versionedObject).
|
|
Reads(versionedObject).
|
|
Writes(versionedObject)
|
|
addParams(route, action.Params)
|
|
ws.Route(route)
|
|
case "DELETE": // Delete a resource.
|
|
route := ws.DELETE(action.Path).To(DeleteResource(gracefulDeleter, isGracefulDeleter, reqScope, admit)).
|
|
Filter(m).
|
|
Doc("delete a "+kind).
|
|
Operation("delete"+kind).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), "application/json")...).
|
|
Writes(versionedStatus).
|
|
Returns(http.StatusOK, "OK", versionedStatus)
|
|
if isGracefulDeleter {
|
|
route.Reads(versionedDeleterObject)
|
|
}
|
|
addParams(route, action.Params)
|
|
ws.Route(route)
|
|
// TODO: deprecated
|
|
case "WATCH": // Watch a resource.
|
|
route := ws.GET(action.Path).To(ListResource(lister, watcher, reqScope, true)).
|
|
Filter(m).
|
|
Doc("watch changes to an object of kind "+kind).
|
|
Operation("watch"+kind).
|
|
Produces("application/json").
|
|
Returns(http.StatusOK, "OK", watchjson.WatchEvent{}).
|
|
Writes(watchjson.WatchEvent{})
|
|
if err := addObjectParams(ws, route, versionedListOptions); err != nil {
|
|
return err
|
|
}
|
|
addParams(route, action.Params)
|
|
ws.Route(route)
|
|
// TODO: deprecated
|
|
case "WATCHLIST": // Watch all resources of a kind.
|
|
route := ws.GET(action.Path).To(ListResource(lister, watcher, reqScope, true)).
|
|
Filter(m).
|
|
Doc("watch individual changes to a list of "+kind).
|
|
Operation("watch"+kind+"list").
|
|
Produces("application/json").
|
|
Returns(http.StatusOK, "OK", watchjson.WatchEvent{}).
|
|
Writes(watchjson.WatchEvent{})
|
|
if err := addObjectParams(ws, route, versionedListOptions); err != nil {
|
|
return err
|
|
}
|
|
addParams(route, action.Params)
|
|
ws.Route(route)
|
|
case "REDIRECT": // Get the redirect URL for a resource.
|
|
route := ws.GET(action.Path).To(routeFunction(redirectHandler)).
|
|
Filter(m).
|
|
Doc("redirect GET request to " + kind).
|
|
Operation("redirect" + kind).
|
|
Produces("*/*").
|
|
Consumes("*/*").
|
|
Writes("string")
|
|
addParams(route, action.Params)
|
|
ws.Route(route)
|
|
case "PROXY": // Proxy requests to a resource.
|
|
// Accept all methods as per https://github.com/GoogleCloudPlatform/kubernetes/issues/3996
|
|
addProxyRoute(ws, "GET", a.prefix, action.Path, proxyHandler, kind, resource, action.Params)
|
|
addProxyRoute(ws, "PUT", a.prefix, action.Path, proxyHandler, kind, resource, action.Params)
|
|
addProxyRoute(ws, "POST", a.prefix, action.Path, proxyHandler, kind, resource, action.Params)
|
|
addProxyRoute(ws, "DELETE", a.prefix, action.Path, proxyHandler, kind, resource, action.Params)
|
|
addProxyRoute(ws, "HEAD", a.prefix, action.Path, proxyHandler, kind, resource, action.Params)
|
|
addProxyRoute(ws, "TRACE", a.prefix, action.Path, proxyHandler, kind, resource, action.Params)
|
|
case "CONNECT":
|
|
for _, method := range connecter.ConnectMethods() {
|
|
route := ws.Method(method).Path(action.Path).
|
|
To(ConnectResource(connecter, reqScope, admit, connectOptionsKind, path, connectSubpath, connectSubpathKey)).
|
|
Filter(m).
|
|
Doc("connect " + method + " requests to " + kind).
|
|
Operation("connect" + method + kind).
|
|
Produces("*/*").
|
|
Consumes("*/*").
|
|
Writes("string")
|
|
if connectOptions != nil {
|
|
if err := addObjectParams(ws, route, connectOptions); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
ws.Route(route)
|
|
}
|
|
default:
|
|
return fmt.Errorf("unrecognized action verb: %s", action.Verb)
|
|
}
|
|
// Note: update GetAttribs() when adding a custom handler.
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// rootScopeNaming reads only names from a request and ignores namespaces. It implements ScopeNamer
|
|
// for root scoped resources.
|
|
type rootScopeNaming struct {
|
|
scope meta.RESTScope
|
|
runtime.SelfLinker
|
|
itemPath string
|
|
}
|
|
|
|
// rootScopeNaming implements ScopeNamer
|
|
var _ ScopeNamer = rootScopeNaming{}
|
|
|
|
// Namespace returns an empty string because root scoped objects have no namespace.
|
|
func (n rootScopeNaming) Namespace(req *restful.Request) (namespace string, err error) {
|
|
return "", nil
|
|
}
|
|
|
|
// Name returns the name from the path and an empty string for namespace, or an error if the
|
|
// name is empty.
|
|
func (n rootScopeNaming) Name(req *restful.Request) (namespace, name string, err error) {
|
|
name = req.PathParameter("name")
|
|
if len(name) == 0 {
|
|
return "", "", errEmptyName
|
|
}
|
|
return "", name, nil
|
|
}
|
|
|
|
// GenerateLink returns the appropriate path and query to locate an object by its canonical path.
|
|
func (n rootScopeNaming) GenerateLink(req *restful.Request, obj runtime.Object) (path, query string, err error) {
|
|
_, name, err := n.ObjectName(obj)
|
|
if err != nil {
|
|
return "", "", err
|
|
}
|
|
if len(name) == 0 {
|
|
_, name, err = n.Name(req)
|
|
if err != nil {
|
|
return "", "", err
|
|
}
|
|
}
|
|
path = strings.Replace(n.itemPath, "{name}", name, 1)
|
|
return path, "", nil
|
|
}
|
|
|
|
// GenerateListLink returns the appropriate path and query to locate a list by its canonical path.
|
|
func (n rootScopeNaming) GenerateListLink(req *restful.Request) (path, query string, err error) {
|
|
path = req.Request.URL.Path
|
|
return path, "", nil
|
|
}
|
|
|
|
// ObjectName returns the name set on the object, or an error if the
|
|
// name cannot be returned. Namespace is empty
|
|
// TODO: distinguish between objects with name/namespace and without via a specific error.
|
|
func (n rootScopeNaming) ObjectName(obj runtime.Object) (namespace, name string, err error) {
|
|
name, err = n.SelfLinker.Name(obj)
|
|
if err != nil {
|
|
return "", "", err
|
|
}
|
|
if len(name) == 0 {
|
|
return "", "", errEmptyName
|
|
}
|
|
return "", name, nil
|
|
}
|
|
|
|
// scopeNaming returns naming information from a request. It implements ScopeNamer for
|
|
// namespace scoped resources.
|
|
type scopeNaming struct {
|
|
scope meta.RESTScope
|
|
runtime.SelfLinker
|
|
itemPath string
|
|
allNamespaces bool
|
|
}
|
|
|
|
// scopeNaming implements ScopeNamer
|
|
var _ ScopeNamer = scopeNaming{}
|
|
|
|
// Namespace returns the namespace from the path or the default.
|
|
func (n scopeNaming) Namespace(req *restful.Request) (namespace string, err error) {
|
|
if n.allNamespaces {
|
|
return "", nil
|
|
}
|
|
namespace = req.PathParameter(n.scope.ParamName())
|
|
if len(namespace) == 0 {
|
|
// a URL was constructed without the namespace, or this method was invoked
|
|
// on an object without a namespace path parameter.
|
|
return "", fmt.Errorf("no namespace parameter found on request")
|
|
}
|
|
return namespace, nil
|
|
}
|
|
|
|
// Name returns the name from the path, the namespace (or default), or an error if the
|
|
// name is empty.
|
|
func (n scopeNaming) Name(req *restful.Request) (namespace, name string, err error) {
|
|
namespace, _ = n.Namespace(req)
|
|
name = req.PathParameter("name")
|
|
if len(name) == 0 {
|
|
return "", "", errEmptyName
|
|
}
|
|
return
|
|
}
|
|
|
|
// GenerateLink returns the appropriate path and query to locate an object by its canonical path.
|
|
func (n scopeNaming) GenerateLink(req *restful.Request, obj runtime.Object) (path, query string, err error) {
|
|
namespace, name, err := n.ObjectName(obj)
|
|
if err != nil {
|
|
return "", "", err
|
|
}
|
|
if len(namespace) == 0 && len(name) == 0 {
|
|
namespace, name, err = n.Name(req)
|
|
if err != nil {
|
|
return "", "", err
|
|
}
|
|
}
|
|
path = strings.Replace(n.itemPath, "{name}", name, 1)
|
|
path = strings.Replace(path, "{"+n.scope.ParamName()+"}", namespace, 1)
|
|
return path, "", nil
|
|
}
|
|
|
|
// GenerateListLink returns the appropriate path and query to locate a list by its canonical path.
|
|
func (n scopeNaming) GenerateListLink(req *restful.Request) (path, query string, err error) {
|
|
path = req.Request.URL.Path
|
|
return path, "", nil
|
|
}
|
|
|
|
// ObjectName returns the name and namespace set on the object, or an error if the
|
|
// name cannot be returned.
|
|
// TODO: distinguish between objects with name/namespace and without via a specific error.
|
|
func (n scopeNaming) ObjectName(obj runtime.Object) (namespace, name string, err error) {
|
|
name, err = n.SelfLinker.Name(obj)
|
|
if err != nil {
|
|
return "", "", err
|
|
}
|
|
namespace, err = n.SelfLinker.Namespace(obj)
|
|
if err != nil {
|
|
return "", "", err
|
|
}
|
|
return namespace, name, err
|
|
}
|
|
|
|
// legacyScopeNaming modifies a scopeNaming to read namespace from the query. It implements
|
|
// ScopeNamer for older query based namespace parameters.
|
|
type legacyScopeNaming struct {
|
|
scope meta.RESTScope
|
|
runtime.SelfLinker
|
|
itemPath string
|
|
}
|
|
|
|
// legacyScopeNaming implements ScopeNamer
|
|
var _ ScopeNamer = legacyScopeNaming{}
|
|
|
|
// Namespace returns the namespace from the query or the default.
|
|
func (n legacyScopeNaming) Namespace(req *restful.Request) (namespace string, err error) {
|
|
if n.scope.Name() == meta.RESTScopeNameRoot {
|
|
return api.NamespaceNone, nil
|
|
}
|
|
values, ok := req.Request.URL.Query()[n.scope.ParamName()]
|
|
if !ok || len(values) == 0 {
|
|
// legacy behavior
|
|
if req.Request.Method == "POST" || len(req.PathParameter("name")) > 0 {
|
|
return api.NamespaceDefault, nil
|
|
}
|
|
return api.NamespaceAll, nil
|
|
}
|
|
return values[0], nil
|
|
}
|
|
|
|
// Name returns the name from the path, the namespace (or default), or an error if the
|
|
// name is empty.
|
|
func (n legacyScopeNaming) Name(req *restful.Request) (namespace, name string, err error) {
|
|
namespace, _ = n.Namespace(req)
|
|
name = req.PathParameter("name")
|
|
if len(name) == 0 {
|
|
return "", "", errEmptyName
|
|
}
|
|
return namespace, name, nil
|
|
}
|
|
|
|
// GenerateLink returns the appropriate path and query to locate an object by its canonical path.
|
|
func (n legacyScopeNaming) GenerateLink(req *restful.Request, obj runtime.Object) (path, query string, err error) {
|
|
namespace, name, err := n.ObjectName(obj)
|
|
if err != nil {
|
|
return "", "", err
|
|
}
|
|
if len(name) == 0 {
|
|
return "", "", errEmptyName
|
|
}
|
|
path = strings.Replace(n.itemPath, "{name}", name, -1)
|
|
values := make(url.Values)
|
|
values.Set(n.scope.ParamName(), namespace)
|
|
query = values.Encode()
|
|
return path, query, nil
|
|
}
|
|
|
|
// GenerateListLink returns the appropriate path and query to locate a list by its canonical path.
|
|
func (n legacyScopeNaming) GenerateListLink(req *restful.Request) (path, query string, err error) {
|
|
namespace, err := n.Namespace(req)
|
|
if err != nil {
|
|
return "", "", err
|
|
}
|
|
path = req.Request.URL.Path
|
|
values := make(url.Values)
|
|
values.Set(n.scope.ParamName(), namespace)
|
|
query = values.Encode()
|
|
return path, query, nil
|
|
}
|
|
|
|
// ObjectName returns the name and namespace set on the object, or an error if the
|
|
// name cannot be returned.
|
|
// TODO: distinguish between objects with name/namespace and without via a specific error.
|
|
func (n legacyScopeNaming) ObjectName(obj runtime.Object) (namespace, name string, err error) {
|
|
name, err = n.SelfLinker.Name(obj)
|
|
if err != nil {
|
|
return "", "", err
|
|
}
|
|
namespace, err = n.SelfLinker.Namespace(obj)
|
|
if err != nil {
|
|
return "", "", err
|
|
}
|
|
return namespace, name, err
|
|
}
|
|
|
|
// This magic incantation returns *ptrToObject for an arbitrary pointer
|
|
func indirectArbitraryPointer(ptrToObject interface{}) interface{} {
|
|
return reflect.Indirect(reflect.ValueOf(ptrToObject)).Interface()
|
|
}
|
|
|
|
func appendIf(actions []action, a action, shouldAppend bool) []action {
|
|
if shouldAppend {
|
|
actions = append(actions, a)
|
|
}
|
|
return actions
|
|
}
|
|
|
|
// Wraps a http.Handler function inside a restful.RouteFunction
|
|
func routeFunction(handler http.Handler) restful.RouteFunction {
|
|
return func(restReq *restful.Request, restResp *restful.Response) {
|
|
handler.ServeHTTP(restResp.ResponseWriter, restReq.Request)
|
|
}
|
|
}
|
|
|
|
func addProxyRoute(ws *restful.WebService, method string, prefix string, path string, proxyHandler http.Handler, kind, resource string, params []*restful.Parameter) {
|
|
proxyRoute := ws.Method(method).Path(path).To(routeFunction(proxyHandler)).
|
|
Filter(monitorFilter("PROXY", resource)).
|
|
Doc("proxy " + method + " requests to " + kind).
|
|
Operation("proxy" + method + kind).
|
|
Produces("*/*").
|
|
Consumes("*/*").
|
|
Writes("string")
|
|
addParams(proxyRoute, params)
|
|
ws.Route(proxyRoute)
|
|
}
|
|
|
|
func addParams(route *restful.RouteBuilder, params []*restful.Parameter) {
|
|
for _, param := range params {
|
|
route.Param(param)
|
|
}
|
|
}
|
|
|
|
// addObjectParams converts a runtime.Object into a set of go-restful Param() definitions on the route.
|
|
// The object must be a pointer to a struct; only fields at the top level of the struct that are not
|
|
// themselves interfaces or structs are used; only fields with a json tag that is non empty (the standard
|
|
// Go JSON behavior for omitting a field) become query parameters. The name of the query parameter is
|
|
// the JSON field name. If a description struct tag is set on the field, that description is used on the
|
|
// query parameter. In essence, it converts a standard JSON top level object into a query param schema.
|
|
func addObjectParams(ws *restful.WebService, route *restful.RouteBuilder, obj interface{}) error {
|
|
sv, err := conversion.EnforcePtr(obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
st := sv.Type()
|
|
switch st.Kind() {
|
|
case reflect.Struct:
|
|
for i := 0; i < st.NumField(); i++ {
|
|
name := st.Field(i).Name
|
|
sf, ok := st.FieldByName(name)
|
|
if !ok {
|
|
continue
|
|
}
|
|
switch sf.Type.Kind() {
|
|
case reflect.Interface, reflect.Struct:
|
|
default:
|
|
jsonTag := sf.Tag.Get("json")
|
|
if len(jsonTag) == 0 {
|
|
continue
|
|
}
|
|
jsonName := strings.SplitN(jsonTag, ",", 2)[0]
|
|
if len(jsonName) == 0 {
|
|
continue
|
|
}
|
|
desc := sf.Tag.Get("description")
|
|
route.Param(ws.QueryParameter(jsonName, desc).DataType(typeToJSON(sf.Type.Name())))
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// TODO: this is incomplete, expand as needed.
|
|
// Convert the name of a golang type to the name of a JSON type
|
|
func typeToJSON(typeName string) string {
|
|
switch typeName {
|
|
case "bool":
|
|
return "boolean"
|
|
case "uint8", "int", "int32", "int64", "uint32", "uint64":
|
|
return "integer"
|
|
case "byte":
|
|
return "string"
|
|
case "float64", "float32":
|
|
return "number"
|
|
case "util.Time":
|
|
return "string"
|
|
default:
|
|
return typeName
|
|
}
|
|
}
|
|
|
|
// defaultStorageMetadata provides default answers to rest.StorageMetadata.
|
|
type defaultStorageMetadata struct{}
|
|
|
|
// defaultStorageMetadata implements rest.StorageMetadata
|
|
var _ rest.StorageMetadata = defaultStorageMetadata{}
|
|
|
|
func (defaultStorageMetadata) ProducesMIMETypes(verb string) []string {
|
|
return nil
|
|
}
|