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| 1 | +package kubernetes |
| 2 | + |
| 3 | +import ( |
| 4 | + "encoding/json" |
| 5 | + "errors" |
| 6 | + "io" |
| 7 | + v1 "k8s.io/api/core/v1" |
| 8 | + apierrors "k8s.io/apimachinery/pkg/api/errors" |
| 9 | + "k8s.io/apimachinery/pkg/runtime" |
| 10 | + "k8s.io/apimachinery/pkg/runtime/serializer" |
| 11 | + "k8s.io/apimachinery/pkg/util/httpstream" |
| 12 | + "k8s.io/apimachinery/pkg/util/httpstream/spdy" |
| 13 | + "k8s.io/client-go/kubernetes/fake" |
| 14 | + "k8s.io/client-go/rest" |
| 15 | + "net/http" |
| 16 | + "net/http/httptest" |
| 17 | +) |
| 18 | + |
| 19 | +type MockServer struct { |
| 20 | + server *httptest.Server |
| 21 | + config *rest.Config |
| 22 | + restClient *rest.RESTClient |
| 23 | + restHandlers []http.HandlerFunc |
| 24 | + clientSet *fake.Clientset |
| 25 | + parameterCodec runtime.ParameterCodec |
| 26 | +} |
| 27 | + |
| 28 | +func NewMockServer() *MockServer { |
| 29 | + ms := &MockServer{ |
| 30 | + clientSet: fake.NewClientset(), |
| 31 | + } |
| 32 | + scheme := runtime.NewScheme() |
| 33 | + codecs := serializer.NewCodecFactory(scheme) |
| 34 | + ms.parameterCodec = runtime.NewParameterCodec(scheme) |
| 35 | + ms.server = httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) { |
| 36 | + for _, handler := range ms.restHandlers { |
| 37 | + handler(w, req) |
| 38 | + } |
| 39 | + })) |
| 40 | + ms.config = &rest.Config{ |
| 41 | + Host: ms.server.URL, |
| 42 | + APIPath: "/api", |
| 43 | + ContentConfig: rest.ContentConfig{ |
| 44 | + NegotiatedSerializer: codecs, |
| 45 | + ContentType: runtime.ContentTypeJSON, |
| 46 | + GroupVersion: &v1.SchemeGroupVersion, |
| 47 | + }, |
| 48 | + } |
| 49 | + ms.restClient, _ = rest.RESTClientFor(ms.config) |
| 50 | + ms.restHandlers = make([]http.HandlerFunc, 0) |
| 51 | + return ms |
| 52 | +} |
| 53 | + |
| 54 | +func (m *MockServer) Close() { |
| 55 | + m.server.Close() |
| 56 | +} |
| 57 | + |
| 58 | +func (m *MockServer) ClientSet() *fake.Clientset { |
| 59 | + return m.clientSet |
| 60 | +} |
| 61 | + |
| 62 | +func (m *MockServer) Handle(handler http.Handler) { |
| 63 | + m.restHandlers = append(m.restHandlers, handler.ServeHTTP) |
| 64 | +} |
| 65 | + |
| 66 | +func (m *MockServer) NewKubernetes() *Kubernetes { |
| 67 | + return &Kubernetes{ |
| 68 | + cfg: m.config, |
| 69 | + restClient: m.restClient, |
| 70 | + clientSet: m.clientSet, |
| 71 | + parameterCodec: m.parameterCodec, |
| 72 | + } |
| 73 | +} |
| 74 | + |
| 75 | +type streamAndReply struct { |
| 76 | + httpstream.Stream |
| 77 | + replySent <-chan struct{} |
| 78 | +} |
| 79 | + |
| 80 | +type streamContext struct { |
| 81 | + conn io.Closer |
| 82 | + stdinStream io.ReadCloser |
| 83 | + stdoutStream io.WriteCloser |
| 84 | + stderrStream io.WriteCloser |
| 85 | + writeStatus func(status *apierrors.StatusError) error |
| 86 | +} |
| 87 | + |
| 88 | +type StreamOptions struct { |
| 89 | + Stdin io.Reader |
| 90 | + Stdout io.Writer |
| 91 | + Stderr io.Writer |
| 92 | +} |
| 93 | + |
| 94 | +func v4WriteStatusFunc(stream io.Writer) func(status *apierrors.StatusError) error { |
| 95 | + return func(status *apierrors.StatusError) error { |
| 96 | + bs, err := json.Marshal(status.Status()) |
| 97 | + if err != nil { |
| 98 | + return err |
| 99 | + } |
| 100 | + _, err = stream.Write(bs) |
| 101 | + return err |
| 102 | + } |
| 103 | +} |
| 104 | +func createHTTPStreams(w http.ResponseWriter, req *http.Request, opts *StreamOptions) (*streamContext, error) { |
| 105 | + _, err := httpstream.Handshake(req, w, []string{"v4.channel.k8s.io"}) |
| 106 | + if err != nil { |
| 107 | + return nil, err |
| 108 | + } |
| 109 | + |
| 110 | + upgrader := spdy.NewResponseUpgrader() |
| 111 | + streamCh := make(chan streamAndReply) |
| 112 | + conn := upgrader.UpgradeResponse(w, req, func(stream httpstream.Stream, replySent <-chan struct{}) error { |
| 113 | + streamCh <- streamAndReply{Stream: stream, replySent: replySent} |
| 114 | + return nil |
| 115 | + }) |
| 116 | + ctx := &streamContext{ |
| 117 | + conn: conn, |
| 118 | + } |
| 119 | + |
| 120 | + // wait for stream |
| 121 | + replyChan := make(chan struct{}, 4) |
| 122 | + defer close(replyChan) |
| 123 | + receivedStreams := 0 |
| 124 | + expectedStreams := 1 |
| 125 | + if opts.Stdout != nil { |
| 126 | + expectedStreams++ |
| 127 | + } |
| 128 | + if opts.Stdin != nil { |
| 129 | + expectedStreams++ |
| 130 | + } |
| 131 | + if opts.Stderr != nil { |
| 132 | + expectedStreams++ |
| 133 | + } |
| 134 | +WaitForStreams: |
| 135 | + for { |
| 136 | + select { |
| 137 | + case stream := <-streamCh: |
| 138 | + streamType := stream.Headers().Get(v1.StreamType) |
| 139 | + switch streamType { |
| 140 | + case v1.StreamTypeError: |
| 141 | + replyChan <- struct{}{} |
| 142 | + ctx.writeStatus = v4WriteStatusFunc(stream) |
| 143 | + case v1.StreamTypeStdout: |
| 144 | + replyChan <- struct{}{} |
| 145 | + ctx.stdoutStream = stream |
| 146 | + case v1.StreamTypeStdin: |
| 147 | + replyChan <- struct{}{} |
| 148 | + ctx.stdinStream = stream |
| 149 | + case v1.StreamTypeStderr: |
| 150 | + replyChan <- struct{}{} |
| 151 | + ctx.stderrStream = stream |
| 152 | + default: |
| 153 | + // add other stream ... |
| 154 | + return nil, errors.New("unimplemented stream type") |
| 155 | + } |
| 156 | + case <-replyChan: |
| 157 | + receivedStreams++ |
| 158 | + if receivedStreams == expectedStreams { |
| 159 | + break WaitForStreams |
| 160 | + } |
| 161 | + } |
| 162 | + } |
| 163 | + |
| 164 | + return ctx, nil |
| 165 | +} |
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