133 lines
3.8 KiB
Go
133 lines
3.8 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 webhook
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import (
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stdjson "encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"os"
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"reflect"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/runtime/serializer/json"
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auditinternal "k8s.io/apiserver/pkg/apis/audit"
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auditv1 "k8s.io/apiserver/pkg/apis/audit/v1"
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auditv1beta1 "k8s.io/apiserver/pkg/apis/audit/v1beta1"
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"k8s.io/apiserver/pkg/audit"
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"k8s.io/client-go/tools/clientcmd/api/v1"
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)
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// newWebhookHandler returns a handler which receives webhook events and decodes the
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// request body. The caller passes a callback which is called on each webhook POST.
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// The object passed to cb is of the same type as list.
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func newWebhookHandler(t *testing.T, list runtime.Object, cb func(events runtime.Object)) http.Handler {
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s := json.NewSerializer(json.DefaultMetaFactory, audit.Scheme, audit.Scheme, false)
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return &testWebhookHandler{
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t: t,
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list: list,
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onEvents: cb,
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serializer: s,
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}
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}
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type testWebhookHandler struct {
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t *testing.T
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list runtime.Object
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onEvents func(events runtime.Object)
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serializer runtime.Serializer
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}
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func (t *testWebhookHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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err := func() error {
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body, err := ioutil.ReadAll(r.Body)
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if err != nil {
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return fmt.Errorf("read webhook request body: %v", err)
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}
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obj, _, err := t.serializer.Decode(body, nil, t.list.DeepCopyObject())
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if err != nil {
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return fmt.Errorf("decode request body: %v", err)
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}
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if reflect.TypeOf(obj).Elem() != reflect.TypeOf(t.list).Elem() {
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return fmt.Errorf("expected %T, got %T", t.list, obj)
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}
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t.onEvents(obj)
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return nil
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}()
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if err == nil {
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io.WriteString(w, "{}")
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return
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}
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// In a goroutine, can't call Fatal.
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assert.NoError(t.t, err, "failed to read request body")
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http.Error(w, err.Error(), http.StatusInternalServerError)
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}
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func newWebhook(t *testing.T, endpoint string, groupVersion schema.GroupVersion) *backend {
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config := v1.Config{
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Clusters: []v1.NamedCluster{
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{Cluster: v1.Cluster{Server: endpoint, InsecureSkipTLSVerify: true}},
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},
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}
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f, err := ioutil.TempFile("", "k8s_audit_webhook_test_")
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require.NoError(t, err, "creating temp file")
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defer func() {
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f.Close()
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os.Remove(f.Name())
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}()
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// NOTE(ericchiang): Do we need to use a proper serializer?
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require.NoError(t, stdjson.NewEncoder(f).Encode(config), "writing kubeconfig")
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b, err := NewBackend(f.Name(), groupVersion, DefaultInitialBackoff, nil)
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require.NoError(t, err, "initializing backend")
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return b.(*backend)
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}
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func TestWebhook(t *testing.T) {
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versions := []schema.GroupVersion{auditv1.SchemeGroupVersion, auditv1beta1.SchemeGroupVersion}
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for _, version := range versions {
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gotEvents := false
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s := httptest.NewServer(newWebhookHandler(t, &auditv1.EventList{}, func(events runtime.Object) {
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gotEvents = true
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}))
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defer s.Close()
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backend := newWebhook(t, s.URL, auditv1.SchemeGroupVersion)
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// Ensure this doesn't return a serialization error.
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event := &auditinternal.Event{}
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require.NoError(t, backend.processEvents(event), fmt.Sprintf("failed to send events, apiVersion: %s", version))
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require.True(t, gotEvents, fmt.Sprintf("no events received, apiVersion: %s", version))
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}
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}
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