k8s.io/apiserver@v0.31.1/pkg/util/webhook/client_test.go (about) 1 /* 2 Copyright 2024 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 webhook 18 19 import ( 20 "testing" 21 22 "golang.org/x/net/http2" 23 "k8s.io/apimachinery/pkg/runtime/schema" 24 ) 25 26 func TestWebhookClientConfig(t *testing.T) { 27 cm, _ := NewClientManager([]schema.GroupVersion{}) 28 authInfoResolver, err := NewDefaultAuthenticationInfoResolver("") 29 if err != nil { 30 t.Fatal(err) 31 } 32 cm.SetAuthenticationInfoResolver(authInfoResolver) 33 cm.SetServiceResolver(NewDefaultServiceResolver()) 34 35 tests := []struct { 36 name string 37 url string 38 expectAllowHTTP2 bool 39 }{ 40 { 41 name: "force http1", 42 url: "https://webhook.example.com", 43 expectAllowHTTP2: false, 44 }, 45 { 46 name: "allow http2 for localhost", 47 url: "https://localhost", 48 expectAllowHTTP2: true, 49 }, 50 { 51 name: "allow http2 for 127.0.0.1", 52 url: "https://127.0.0.1", 53 expectAllowHTTP2: true, 54 }, 55 { 56 name: "allow http2 for [::1]:0", 57 url: "https://[::1]", 58 expectAllowHTTP2: true, 59 }, 60 } 61 for _, tc := range tests { 62 t.Run(tc.name, func(t *testing.T) { 63 64 cc := ClientConfig{ 65 URL: tc.url, 66 } 67 cfg, err := cm.hookClientConfig(cc) 68 if err != nil { 69 t.Fatal(err) 70 } 71 if tc.expectAllowHTTP2 && !allowHTTP2(cfg.NextProtos) { 72 t.Errorf("expected allow http/2, got: %v", cfg.NextProtos) 73 } 74 }) 75 } 76 } 77 78 func allowHTTP2(nextProtos []string) bool { 79 if len(nextProtos) == 0 { 80 // the transport expressed no NextProto preference, allow 81 return true 82 } 83 for _, p := range nextProtos { 84 if p == http2.NextProtoTLS { 85 // the transport explicitly allowed http/2 86 return true 87 } 88 } 89 // the transport explicitly set NextProtos and excluded http/2 90 return false 91 }