Ejemplo n.º 1
0
func (cli *DockerCli) streamHelper(method, path string, setRawTerminal bool, in io.Reader, stdout, stderr io.Writer, headers map[string][]string) error {
	if (method == "POST" || method == "PUT") && in == nil {
		in = bytes.NewReader([]byte{})
	}

	req, err := http.NewRequest(method, fmt.Sprintf("http://v%s%s", api.APIVERSION, path), in)
	if err != nil {
		return err
	}
	req.Header.Set("User-Agent", "Docker-Client/"+dockerversion.VERSION)
	req.URL.Host = cli.addr
	req.URL.Scheme = cli.scheme
	if method == "POST" {
		req.Header.Set("Content-Type", "plain/text")
	}

	if headers != nil {
		for k, v := range headers {
			req.Header[k] = v
		}
	}
	resp, err := cli.HTTPClient().Do(req)
	if err != nil {
		if strings.Contains(err.Error(), "connection refused") {
			return fmt.Errorf("Cannot connect to the Docker daemon. Is 'docker -d' running on this host?")
		}
		return err
	}
	defer resp.Body.Close()

	if resp.StatusCode < 200 || resp.StatusCode >= 400 {
		body, err := ioutil.ReadAll(resp.Body)
		if err != nil {
			return err
		}
		if len(body) == 0 {
			return fmt.Errorf("Error :%s", http.StatusText(resp.StatusCode))
		}
		return fmt.Errorf("Error: %s", bytes.TrimSpace(body))
	}

	if api.MatchesContentType(resp.Header.Get("Content-Type"), "application/json") {
		return utils.DisplayJSONMessagesStream(resp.Body, stdout, cli.terminalFd, cli.isTerminal)
	}
	if stdout != nil || stderr != nil {
		// When TTY is ON, use regular copy
		if setRawTerminal {
			_, err = io.Copy(stdout, resp.Body)
		} else {
			_, err = utils.StdCopy(stdout, stderr, resp.Body)
		}
		log.Debugf("[stream] End of stdout")
		return err
	}
	return nil
}
Ejemplo n.º 2
0
func (cli *DockerCli) hijack(method, path string, setRawTerminal bool, in io.ReadCloser, stdout, stderr io.Writer, started chan io.Closer) error {
	defer func() {
		if started != nil {
			close(started)
		}
	}()

	req, err := http.NewRequest(method, fmt.Sprintf("/v%s%s", api.APIVERSION, path), nil)
	if err != nil {
		return err
	}
	req.Header.Set("User-Agent", "Docker-Client/"+dockerversion.VERSION)
	req.Header.Set("Content-Type", "plain/text")
	req.Host = cli.addr

	dial, err := cli.dial()
	if err != nil {
		if strings.Contains(err.Error(), "connection refused") {
			return fmt.Errorf("Cannot connect to the Docker daemon. Is 'docker -d' running on this host?")
		}
		return err
	}
	clientconn := httputil.NewClientConn(dial, nil)
	defer clientconn.Close()

	// Server hijacks the connection, error 'connection closed' expected
	clientconn.Do(req)

	rwc, br := clientconn.Hijack()
	defer rwc.Close()

	if started != nil {
		started <- rwc
	}

	var receiveStdout chan error

	var oldState *term.State

	if in != nil && setRawTerminal && cli.isTerminal && os.Getenv("NORAW") == "" {
		oldState, err = term.SetRawTerminal(cli.terminalFd)
		if err != nil {
			return err
		}
		defer term.RestoreTerminal(cli.terminalFd, oldState)
	}

	if stdout != nil || stderr != nil {
		receiveStdout = utils.Go(func() (err error) {
			defer func() {
				if in != nil {
					if setRawTerminal && cli.isTerminal {
						term.RestoreTerminal(cli.terminalFd, oldState)
					}
					// For some reason this Close call blocks on darwin..
					// As the client exists right after, simply discard the close
					// until we find a better solution.
					if runtime.GOOS != "darwin" {
						in.Close()
					}
				}
			}()

			// When TTY is ON, use regular copy
			if setRawTerminal && stdout != nil {
				_, err = io.Copy(stdout, br)
			} else {
				_, err = utils.StdCopy(stdout, stderr, br)
			}
			log.Debugf("[hijack] End of stdout")
			return err
		})
	}

	sendStdin := utils.Go(func() error {
		if in != nil {
			io.Copy(rwc, in)
			log.Debugf("[hijack] End of stdin")
		}
		if tcpc, ok := rwc.(*net.TCPConn); ok {
			if err := tcpc.CloseWrite(); err != nil {
				log.Debugf("Couldn't send EOF: %s", err)
			}
		} else if unixc, ok := rwc.(*net.UnixConn); ok {
			if err := unixc.CloseWrite(); err != nil {
				log.Debugf("Couldn't send EOF: %s", err)
			}
		}
		// Discard errors due to pipe interruption
		return nil
	})

	if stdout != nil || stderr != nil {
		if err := <-receiveStdout; err != nil {
			log.Debugf("Error receiveStdout: %s", err)
			return err
		}
	}

	if !cli.isTerminal {
		if err := <-sendStdin; err != nil {
			log.Debugf("Error sendStdin: %s", err)
			return err
		}
	}
	return nil
}