mirror of https://github.com/docker/docs.git
134 lines
3.1 KiB
Go
134 lines
3.1 KiB
Go
package client
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import (
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"crypto/tls"
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"fmt"
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"io"
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"net"
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"net/http"
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"net/http/httputil"
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"os"
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"runtime"
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"strings"
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"github.com/dotcloud/docker/api"
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"github.com/dotcloud/docker/dockerversion"
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"github.com/dotcloud/docker/pkg/term"
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"github.com/dotcloud/docker/utils"
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)
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func (cli *DockerCli) dial() (net.Conn, error) {
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if cli.tlsConfig != nil && cli.proto != "unix" {
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return tls.Dial(cli.proto, cli.addr, cli.tlsConfig)
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}
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return net.Dial(cli.proto, cli.addr)
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}
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func (cli *DockerCli) hijack(method, path string, setRawTerminal bool, in io.ReadCloser, stdout, stderr io.Writer, started chan io.Closer) error {
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defer func() {
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if started != nil {
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close(started)
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}
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}()
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req, err := http.NewRequest(method, fmt.Sprintf("/v%s%s", api.APIVERSION, path), nil)
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if err != nil {
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return err
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}
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req.Header.Set("User-Agent", "Docker-Client/"+dockerversion.VERSION)
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req.Header.Set("Content-Type", "plain/text")
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req.Host = cli.addr
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dial, err := cli.dial()
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if err != nil {
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if strings.Contains(err.Error(), "connection refused") {
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return fmt.Errorf("Cannot connect to the Docker daemon. Is 'docker -d' running on this host?")
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}
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return err
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}
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clientconn := httputil.NewClientConn(dial, nil)
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defer clientconn.Close()
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// Server hijacks the connection, error 'connection closed' expected
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clientconn.Do(req)
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rwc, br := clientconn.Hijack()
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defer rwc.Close()
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if started != nil {
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started <- rwc
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}
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var receiveStdout chan error
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var oldState *term.State
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if in != nil && setRawTerminal && cli.isTerminal && os.Getenv("NORAW") == "" {
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oldState, err = term.SetRawTerminal(cli.terminalFd)
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if err != nil {
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return err
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}
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defer term.RestoreTerminal(cli.terminalFd, oldState)
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}
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if stdout != nil || stderr != nil {
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receiveStdout = utils.Go(func() (err error) {
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defer func() {
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if in != nil {
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if setRawTerminal && cli.isTerminal {
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term.RestoreTerminal(cli.terminalFd, oldState)
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}
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// For some reason this Close call blocks on darwin..
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// As the client exists right after, simply discard the close
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// until we find a better solution.
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if runtime.GOOS != "darwin" {
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in.Close()
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}
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}
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}()
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// When TTY is ON, use regular copy
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if setRawTerminal {
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_, err = io.Copy(stdout, br)
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} else {
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_, err = utils.StdCopy(stdout, stderr, br)
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}
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utils.Debugf("[hijack] End of stdout")
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return err
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})
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}
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sendStdin := utils.Go(func() error {
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if in != nil {
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io.Copy(rwc, in)
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utils.Debugf("[hijack] End of stdin")
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}
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if tcpc, ok := rwc.(*net.TCPConn); ok {
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if err := tcpc.CloseWrite(); err != nil {
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utils.Debugf("Couldn't send EOF: %s\n", err)
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}
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} else if unixc, ok := rwc.(*net.UnixConn); ok {
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if err := unixc.CloseWrite(); err != nil {
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utils.Debugf("Couldn't send EOF: %s\n", err)
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}
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}
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// Discard errors due to pipe interruption
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return nil
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})
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if stdout != nil || stderr != nil {
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if err := <-receiveStdout; err != nil {
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utils.Debugf("Error receiveStdout: %s", err)
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return err
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}
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}
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if !cli.isTerminal {
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if err := <-sendStdin; err != nil {
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utils.Debugf("Error sendStdin: %s", err)
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return err
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}
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}
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return nil
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}
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