Golang httputils.HijackConnection函数代码示例

// TODO(vishh): Refactor the code to avoid having to specify stream config as part of both create and start.
func (s *containerRouter) postContainerExecStart(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if err := httputils.ParseForm(r); err != nil {
		return err
	}

	version := httputils.VersionFromContext(ctx)
	if versions.GreaterThan(version, "1.21") {
		if err := httputils.CheckForJSON(r); err != nil {
			return err
		}
	}

	var (
		execName                  = vars["name"]
		stdin, inStream           io.ReadCloser
		stdout, stderr, outStream io.Writer
	)

	execStartCheck := &types.ExecStartCheck{}
	if err := json.NewDecoder(r.Body).Decode(execStartCheck); err != nil {
		return err
	}

	if exists, err := s.backend.ExecExists(execName); !exists {
		return err
	}

	if !execStartCheck.Detach {
		var err error
		// Setting up the streaming http interface.
		inStream, outStream, err = httputils.HijackConnection(w)
		if err != nil {
			return err
		}
		defer httputils.CloseStreams(inStream, outStream)

		if _, ok := r.Header["Upgrade"]; ok {
			fmt.Fprintf(outStream, "HTTP/1.1 101 UPGRADED\r\nContent-Type: application/vnd.docker.raw-stream\r\nConnection: Upgrade\r\nUpgrade: tcp\r\n\r\n")
		} else {
			fmt.Fprintf(outStream, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
		}

		stdin = inStream
		stdout = outStream
		if !execStartCheck.Tty {
			stderr = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
			stdout = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
		}
	}

	// Now run the user process in container.
	if err := s.backend.ContainerExecStart(execName, stdin, stdout, stderr); err != nil {
		if execStartCheck.Detach {
			return err
		}
		stdout.Write([]byte(err.Error() + "\r\n"))
		logrus.Errorf("Error running exec in container: %v", err)
	}
	return nil
}

func (s *containerRouter) postContainerAttach(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if err := httputils.ParseForm(r); err != nil {
		return err
	}

	container := r.Form.Get("container")
	// Setting up the streaming http interface.
	inStream, outStream, err := httputils.HijackConnection(w)
	if err != nil {
		return err
	}
	defer httputils.CloseStreams(inStream, outStream)

	fmt.Fprintf(outStream, "HTTP/1.1 101 UPGRADED\r\nContent-Type: application/vnd.docker.raw-stream\r\nConnection: Upgrade\r\nUpgrade: tcp\r\n\r\n")

	return s.backend.CmdAttach(inStream, outStream.(io.WriteCloser), container)
}

// TODO(vishh): Refactor the code to avoid having to specify stream config as part of both create and start.
func (s *router) postContainerExecStart(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if err := httputils.ParseForm(r); err != nil {
		return err
	}
	var (
		execName                  = vars["name"]
		stdin, inStream           io.ReadCloser
		stdout, stderr, outStream io.Writer
	)

	execStartCheck := &types.ExecStartCheck{}
	if err := json.NewDecoder(r.Body).Decode(execStartCheck); err != nil {
		return err
	}

	if !execStartCheck.Detach {
		var err error
		// Setting up the streaming http interface.
		inStream, outStream, err = httputils.HijackConnection(w)
		if err != nil {
			return err
		}
		defer httputils.CloseStreams(inStream, outStream)

		if _, ok := r.Header["Upgrade"]; ok {
			fmt.Fprintf(outStream, "HTTP/1.1 101 UPGRADED\r\nContent-Type: application/vnd.docker.raw-stream\r\nConnection: Upgrade\r\nUpgrade: tcp\r\n\r\n")
		} else {
			fmt.Fprintf(outStream, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
		}

		stdin = inStream
		stdout = outStream
		if !execStartCheck.Tty {
			stderr = stdcopy.NewStdWriter(outStream, stdcopy.Stderr)
			stdout = stdcopy.NewStdWriter(outStream, stdcopy.Stdout)
		}
	} else {
		outStream = w
	}

	// Now run the user process in container.
	if err := s.daemon.ContainerExecStart(execName, stdin, stdout, stderr); err != nil {
		fmt.Fprintf(outStream, "Error running exec in container: %v\n", err)
	}
	return nil
}

func (s *router) postContainersAttach(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
	if err := httputils.ParseForm(r); err != nil {
		return err
	}
	containerName := vars["name"]

	if !s.daemon.Exists(containerName) {
		return derr.ErrorCodeNoSuchContainer.WithArgs(containerName)
	}

	if s.daemon.IsPaused(containerName) {
		return derr.ErrorCodePausedContainer.WithArgs(containerName)
	}

	inStream, outStream, err := httputils.HijackConnection(w)
	if err != nil {
		return err
	}
	defer httputils.CloseStreams(inStream, outStream)

	if _, ok := r.Header["Upgrade"]; ok {
		fmt.Fprintf(outStream, "HTTP/1.1 101 UPGRADED\r\nContent-Type: application/vnd.docker.raw-stream\r\nConnection: Upgrade\r\nUpgrade: tcp\r\n\r\n")
	} else {
		fmt.Fprintf(outStream, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
	}

	attachWithLogsConfig := &daemon.ContainerAttachWithLogsConfig{
		InStream:  inStream,
		OutStream: outStream,
		UseStdin:  httputils.BoolValue(r, "stdin"),
		UseStdout: httputils.BoolValue(r, "stdout"),
		UseStderr: httputils.BoolValue(r, "stderr"),
		Logs:      httputils.BoolValue(r, "logs"),
		Stream:    httputils.BoolValue(r, "stream"),
	}

	if err := s.daemon.ContainerAttachWithLogs(containerName, attachWithLogsConfig); err != nil {
		fmt.Fprintf(outStream, "Error attaching: %s\n", err)
	}

	return nil
}