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()
}
}
}
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
}
// 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))
}
}
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)
}
}
})
}