Example #1
0
func (s *Server) handlePortForward(w http.ResponseWriter, req *http.Request) {
	u, err := url.ParseRequestURI(req.RequestURI)
	if err != nil {
		s.error(w, err)
		return
	}
	podNamespace, podID, uid, err := parsePodCoordinates(u.Path)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	pod, ok := s.host.GetPodByName(podNamespace, podID)
	if !ok {
		http.Error(w, "Pod does not exist", http.StatusNotFound)
		return
	}

	streamChan := make(chan httpstream.Stream, 1)
	upgrader := spdy.NewResponseUpgrader()
	conn := upgrader.UpgradeResponse(w, req, func(stream httpstream.Stream) error {
		portString := stream.Headers().Get(api.PortHeader)
		port, err := strconv.ParseUint(portString, 10, 16)
		if err != nil {
			return fmt.Errorf("Unable to parse '%s' as a port: %v", portString, err)
		}
		if port < 1 {
			return fmt.Errorf("Port '%d' must be greater than 0", port)
		}
		streamChan <- stream
		return nil
	})
	if conn == nil {
		return
	}
	defer conn.Close()
	conn.SetIdleTimeout(s.host.StreamingConnectionIdleTimeout())

	var dataStreamLock sync.Mutex
	dataStreamChans := make(map[string]chan httpstream.Stream)

Loop:
	for {
		select {
		case <-conn.CloseChan():
			break Loop
		case stream := <-streamChan:
			streamType := stream.Headers().Get(api.StreamType)
			port := stream.Headers().Get(api.PortHeader)
			dataStreamLock.Lock()
			switch streamType {
			case "error":
				ch := make(chan httpstream.Stream)
				dataStreamChans[port] = ch
				go waitForPortForwardDataStreamAndRun(kubecontainer.GetPodFullName(pod), uid, stream, ch, s.host)
			case "data":
				ch, ok := dataStreamChans[port]
				if ok {
					ch <- stream
					delete(dataStreamChans, port)
				} else {
					glog.Errorf("Unable to locate data stream channel for port %s", port)
				}
			default:
				glog.Errorf("streamType header must be 'error' or 'data', got: '%s'", streamType)
				stream.Reset()
			}
			dataStreamLock.Unlock()
		}
	}
}
Example #2
0
func (s *Server) createStreams(w http.ResponseWriter, req *http.Request) (io.Reader, io.WriteCloser, io.WriteCloser, io.WriteCloser, httpstream.Connection, bool, bool) {
	req.ParseForm()
	// start at 1 for error stream
	expectedStreams := 1
	if req.FormValue(api.ExecStdinParam) == "1" {
		expectedStreams++
	}
	if req.FormValue(api.ExecStdoutParam) == "1" {
		expectedStreams++
	}
	tty := req.FormValue(api.ExecTTYParam) == "1"
	if !tty && req.FormValue(api.ExecStderrParam) == "1" {
		expectedStreams++
	}

	if expectedStreams == 1 {
		http.Error(w, "You must specify at least 1 of stdin, stdout, stderr", http.StatusBadRequest)
		return nil, nil, nil, nil, nil, false, false
	}

	streamCh := make(chan httpstream.Stream)

	upgrader := spdy.NewResponseUpgrader()
	conn := upgrader.UpgradeResponse(w, req, func(stream httpstream.Stream) error {
		streamCh <- stream
		return nil
	})
	// from this point on, we can no longer call methods on w
	if conn == nil {
		// The upgrader is responsible for notifying the client of any errors that
		// occurred during upgrading. All we can do is return here at this point
		// if we weren't successful in upgrading.
		return nil, nil, nil, nil, nil, false, false
	}

	conn.SetIdleTimeout(s.host.StreamingConnectionIdleTimeout())

	// TODO make it configurable?
	expired := time.NewTimer(streamCreationTimeout)

	var errorStream, stdinStream, stdoutStream, stderrStream httpstream.Stream
	receivedStreams := 0
WaitForStreams:
	for {
		select {
		case stream := <-streamCh:
			streamType := stream.Headers().Get(api.StreamType)
			switch streamType {
			case api.StreamTypeError:
				errorStream = stream
				defer errorStream.Reset()
				receivedStreams++
			case api.StreamTypeStdin:
				stdinStream = stream
				receivedStreams++
			case api.StreamTypeStdout:
				stdoutStream = stream
				receivedStreams++
			case api.StreamTypeStderr:
				stderrStream = stream
				receivedStreams++
			default:
				glog.Errorf("Unexpected stream type: '%s'", streamType)
			}
			if receivedStreams == expectedStreams {
				break WaitForStreams
			}
		case <-expired.C:
			// TODO find a way to return the error to the user. Maybe use a separate
			// stream to report errors?
			glog.Error("Timed out waiting for client to create streams")
			return nil, nil, nil, nil, nil, false, false
		}
	}

	if stdinStream != nil {
		// close our half of the input stream, since we won't be writing to it
		stdinStream.Close()
	}

	return stdinStream, stdoutStream, stderrStream, errorStream, conn, tty, true
}
Example #3
0
// handleExec handles requests to run a command inside a container.
func (s *Server) handleExec(w http.ResponseWriter, req *http.Request) {
	u, err := url.ParseRequestURI(req.RequestURI)
	if err != nil {
		s.error(w, err)
		return
	}
	podNamespace, podID, uid, container, err := parseContainerCoordinates(u.Path)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
	pod, ok := s.host.GetPodByName(podNamespace, podID)
	if !ok {
		http.Error(w, "Pod does not exist", http.StatusNotFound)
		return
	}

	req.ParseForm()
	// start at 1 for error stream
	expectedStreams := 1
	if req.FormValue(api.ExecStdinParam) == "1" {
		expectedStreams++
	}
	if req.FormValue(api.ExecStdoutParam) == "1" {
		expectedStreams++
	}
	tty := req.FormValue(api.ExecTTYParam) == "1"
	if !tty && req.FormValue(api.ExecStderrParam) == "1" {
		expectedStreams++
	}

	if expectedStreams == 1 {
		http.Error(w, "You must specify at least 1 of stdin, stdout, stderr", http.StatusBadRequest)
		return
	}

	streamCh := make(chan httpstream.Stream)

	upgrader := spdy.NewResponseUpgrader()
	conn := upgrader.UpgradeResponse(w, req, func(stream httpstream.Stream) error {
		streamCh <- stream
		return nil
	})
	// from this point on, we can no longer call methods on w
	if conn == nil {
		// The upgrader is responsible for notifying the client of any errors that
		// occurred during upgrading. All we can do is return here at this point
		// if we weren't successful in upgrading.
		return
	}
	defer conn.Close()

	conn.SetIdleTimeout(s.host.StreamingConnectionIdleTimeout())

	// TODO make it configurable?
	expired := time.NewTimer(streamCreationTimeout)

	var errorStream, stdinStream, stdoutStream, stderrStream httpstream.Stream
	receivedStreams := 0
WaitForStreams:
	for {
		select {
		case stream := <-streamCh:
			streamType := stream.Headers().Get(api.StreamType)
			switch streamType {
			case api.StreamTypeError:
				errorStream = stream
				defer errorStream.Reset()
				receivedStreams++
			case api.StreamTypeStdin:
				stdinStream = stream
				receivedStreams++
			case api.StreamTypeStdout:
				stdoutStream = stream
				receivedStreams++
			case api.StreamTypeStderr:
				stderrStream = stream
				receivedStreams++
			default:
				glog.Errorf("Unexpected stream type: '%s'", streamType)
			}
			if receivedStreams == expectedStreams {
				break WaitForStreams
			}
		case <-expired.C:
			// TODO find a way to return the error to the user. Maybe use a separate
			// stream to report errors?
			glog.Error("Timed out waiting for client to create streams")
			return
		}
	}

	if stdinStream != nil {
		// close our half of the input stream, since we won't be writing to it
		stdinStream.Close()
	}

	err = s.host.ExecInContainer(kubecontainer.GetPodFullName(pod), uid, container, u.Query()[api.ExecCommandParamm], stdinStream, stdoutStream, stderrStream, tty)
	if err != nil {
		msg := fmt.Sprintf("Error executing command in container: %v", err)
		glog.Error(msg)
		errorStream.Write([]byte(msg))
	}
}
Example #4
0
func fakeExecServer(t *testing.T, i int, stdinData, stdoutData, stderrData, errorData string, tty bool) http.HandlerFunc {
	// error + stdin + stdout
	expectedStreams := 3
	if !tty {
		// stderr
		expectedStreams++
	}

	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
		streamCh := make(chan httpstream.Stream)

		upgrader := spdy.NewResponseUpgrader()
		conn := upgrader.UpgradeResponse(w, req, func(stream httpstream.Stream) error {
			streamCh <- stream
			return nil
		})
		// from this point on, we can no longer call methods on w
		if conn == nil {
			// The upgrader is responsible for notifying the client of any errors that
			// occurred during upgrading. All we can do is return here at this point
			// if we weren't successful in upgrading.
			return
		}
		defer conn.Close()

		var errorStream, stdinStream, stdoutStream, stderrStream httpstream.Stream
		receivedStreams := 0
	WaitForStreams:
		for {
			select {
			case stream := <-streamCh:
				streamType := stream.Headers().Get(api.StreamType)
				switch streamType {
				case api.StreamTypeError:
					errorStream = stream
					receivedStreams++
				case api.StreamTypeStdin:
					stdinStream = stream
					stdinStream.Close()
					receivedStreams++
				case api.StreamTypeStdout:
					stdoutStream = stream
					receivedStreams++
				case api.StreamTypeStderr:
					stderrStream = stream
					receivedStreams++
				default:
					t.Errorf("%d: unexpected stream type: %q", i, streamType)
				}

				defer stream.Reset()

				if receivedStreams == expectedStreams {
					break WaitForStreams
				}
			}
		}

		if len(errorData) > 0 {
			fmt.Fprint(errorStream, errorData)
			errorStream.Close()
		}

		if len(stdoutData) > 0 {
			fmt.Fprint(stdoutStream, stdoutData)
			stdoutStream.Close()
		}
		if len(stderrData) > 0 {
			fmt.Fprint(stderrStream, stderrData)
			stderrStream.Close()
		}
		if len(stdinData) > 0 {
			data, err := ioutil.ReadAll(stdinStream)
			if err != nil {
				t.Errorf("%d: error reading stdin stream: %v", i, err)
			}
			if e, a := stdinData, string(data); e != a {
				t.Errorf("%d: stdin: expected %q, got %q", i, e, a)
			}
		}
	})
}