Matthias Andreas Benkard | 832a54e | 2019-01-29 09:27:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | Copyright 2017 The Kubernetes Authors. |
| 3 | |
| 4 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | you may not use this file except in compliance with the License. |
| 6 | You may obtain a copy of the License at |
| 7 | |
| 8 | http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | Unless required by applicable law or agreed to in writing, software |
| 11 | distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | See the License for the specific language governing permissions and |
| 14 | limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package handlers |
| 18 | |
| 19 | import ( |
| 20 | "context" |
| 21 | "fmt" |
| 22 | "net/http" |
| 23 | "time" |
| 24 | |
| 25 | "k8s.io/apimachinery/pkg/api/errors" |
| 26 | "k8s.io/apimachinery/pkg/api/meta" |
| 27 | metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 28 | "k8s.io/apimachinery/pkg/runtime" |
| 29 | "k8s.io/apimachinery/pkg/runtime/schema" |
| 30 | "k8s.io/apiserver/pkg/admission" |
| 31 | "k8s.io/apiserver/pkg/audit" |
| 32 | "k8s.io/apiserver/pkg/endpoints/handlers/negotiation" |
| 33 | "k8s.io/apiserver/pkg/endpoints/request" |
| 34 | "k8s.io/apiserver/pkg/registry/rest" |
| 35 | utiltrace "k8s.io/apiserver/pkg/util/trace" |
| 36 | ) |
| 37 | |
| 38 | func createHandler(r rest.NamedCreater, scope RequestScope, admit admission.Interface, includeName bool) http.HandlerFunc { |
| 39 | return func(w http.ResponseWriter, req *http.Request) { |
| 40 | // For performance tracking purposes. |
| 41 | trace := utiltrace.New("Create " + req.URL.Path) |
| 42 | defer trace.LogIfLong(500 * time.Millisecond) |
| 43 | |
| 44 | if isDryRun(req.URL) { |
| 45 | scope.err(errors.NewBadRequest("dryRun is not supported yet"), w, req) |
| 46 | return |
| 47 | } |
| 48 | |
| 49 | // TODO: we either want to remove timeout or document it (if we document, move timeout out of this function and declare it in api_installer) |
| 50 | timeout := parseTimeout(req.URL.Query().Get("timeout")) |
| 51 | |
| 52 | var ( |
| 53 | namespace, name string |
| 54 | err error |
| 55 | ) |
| 56 | if includeName { |
| 57 | namespace, name, err = scope.Namer.Name(req) |
| 58 | } else { |
| 59 | namespace, err = scope.Namer.Namespace(req) |
| 60 | } |
| 61 | if err != nil { |
| 62 | scope.err(err, w, req) |
| 63 | return |
| 64 | } |
| 65 | |
| 66 | ctx := req.Context() |
| 67 | ctx = request.WithNamespace(ctx, namespace) |
| 68 | |
| 69 | gv := scope.Kind.GroupVersion() |
| 70 | s, err := negotiation.NegotiateInputSerializer(req, false, scope.Serializer) |
| 71 | if err != nil { |
| 72 | scope.err(err, w, req) |
| 73 | return |
| 74 | } |
| 75 | decoder := scope.Serializer.DecoderToVersion(s.Serializer, schema.GroupVersion{Group: gv.Group, Version: runtime.APIVersionInternal}) |
| 76 | |
| 77 | body, err := readBody(req) |
| 78 | if err != nil { |
| 79 | scope.err(err, w, req) |
| 80 | return |
| 81 | } |
| 82 | |
| 83 | defaultGVK := scope.Kind |
| 84 | original := r.New() |
| 85 | trace.Step("About to convert to expected version") |
| 86 | obj, gvk, err := decoder.Decode(body, &defaultGVK, original) |
| 87 | if err != nil { |
| 88 | err = transformDecodeError(scope.Typer, err, original, gvk, body) |
| 89 | scope.err(err, w, req) |
| 90 | return |
| 91 | } |
| 92 | if gvk.GroupVersion() != gv { |
| 93 | err = errors.NewBadRequest(fmt.Sprintf("the API version in the data (%s) does not match the expected API version (%v)", gvk.GroupVersion().String(), gv.String())) |
| 94 | scope.err(err, w, req) |
| 95 | return |
| 96 | } |
| 97 | trace.Step("Conversion done") |
| 98 | |
| 99 | ae := request.AuditEventFrom(ctx) |
| 100 | admit = admission.WithAudit(admit, ae) |
| 101 | audit.LogRequestObject(ae, obj, scope.Resource, scope.Subresource, scope.Serializer) |
| 102 | |
| 103 | userInfo, _ := request.UserFrom(ctx) |
| 104 | admissionAttributes := admission.NewAttributesRecord(obj, nil, scope.Kind, namespace, name, scope.Resource, scope.Subresource, admission.Create, userInfo) |
| 105 | if mutatingAdmission, ok := admit.(admission.MutationInterface); ok && mutatingAdmission.Handles(admission.Create) { |
| 106 | err = mutatingAdmission.Admit(admissionAttributes) |
| 107 | if err != nil { |
| 108 | scope.err(err, w, req) |
| 109 | return |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | // TODO: replace with content type negotiation? |
| 114 | includeUninitialized := req.URL.Query().Get("includeUninitialized") == "1" |
| 115 | |
| 116 | trace.Step("About to store object in database") |
| 117 | result, err := finishRequest(timeout, func() (runtime.Object, error) { |
| 118 | return r.Create( |
| 119 | ctx, |
| 120 | name, |
| 121 | obj, |
| 122 | rest.AdmissionToValidateObjectFunc(admit, admissionAttributes), |
| 123 | includeUninitialized, |
| 124 | ) |
| 125 | }) |
| 126 | if err != nil { |
| 127 | scope.err(err, w, req) |
| 128 | return |
| 129 | } |
| 130 | trace.Step("Object stored in database") |
| 131 | |
| 132 | requestInfo, ok := request.RequestInfoFrom(ctx) |
| 133 | if !ok { |
| 134 | scope.err(fmt.Errorf("missing requestInfo"), w, req) |
| 135 | return |
| 136 | } |
| 137 | if err := setSelfLink(result, requestInfo, scope.Namer); err != nil { |
| 138 | scope.err(err, w, req) |
| 139 | return |
| 140 | } |
| 141 | trace.Step("Self-link added") |
| 142 | |
| 143 | // If the object is partially initialized, always indicate it via StatusAccepted |
| 144 | code := http.StatusCreated |
| 145 | if accessor, err := meta.Accessor(result); err == nil { |
| 146 | if accessor.GetInitializers() != nil { |
| 147 | code = http.StatusAccepted |
| 148 | } |
| 149 | } |
| 150 | status, ok := result.(*metav1.Status) |
| 151 | if ok && err == nil && status.Code == 0 { |
| 152 | status.Code = int32(code) |
| 153 | } |
| 154 | |
| 155 | transformResponseObject(ctx, scope, req, w, code, result) |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | // CreateNamedResource returns a function that will handle a resource creation with name. |
| 160 | func CreateNamedResource(r rest.NamedCreater, scope RequestScope, admission admission.Interface) http.HandlerFunc { |
| 161 | return createHandler(r, scope, admission, true) |
| 162 | } |
| 163 | |
| 164 | // CreateResource returns a function that will handle a resource creation. |
| 165 | func CreateResource(r rest.Creater, scope RequestScope, admission admission.Interface) http.HandlerFunc { |
| 166 | return createHandler(&namedCreaterAdapter{r}, scope, admission, false) |
| 167 | } |
| 168 | |
| 169 | type namedCreaterAdapter struct { |
| 170 | rest.Creater |
| 171 | } |
| 172 | |
| 173 | func (c *namedCreaterAdapter) Create(ctx context.Context, name string, obj runtime.Object, createValidatingAdmission rest.ValidateObjectFunc, includeUninitialized bool) (runtime.Object, error) { |
| 174 | return c.Creater.Create(ctx, obj, createValidatingAdmission, includeUninitialized) |
| 175 | } |