func NewDockerCli(in io.ReadCloser, out, err io.Writer, proto, addr string, tlsConfig *tls.Config) *DockerCli {
var (
isTerminal = false
terminalFd uintptr
)
if in != nil {
if file, ok := in.(*os.File); ok {
terminalFd = file.Fd()
isTerminal = term.IsTerminal(terminalFd)
}
}
if err == nil {
err = out
}
return &DockerCli{
proto: proto,
addr: addr,
in: in,
out: out,
err: err,
isTerminal: isTerminal,
terminalFd: terminalFd,
tlsConfig: tlsConfig,
}
}
func (c *DockerClient) hijack(method, path string, setRawTerminal bool, in io.Reader, errStream io.Writer, out io.Writer) error {
req, err := http.NewRequest(method, c.getURL(path), nil)
if err != nil {
return err
}
req.Header.Set("Content-Type", "plain/text")
protocol := c.endpointURL.Scheme
address := c.endpointURL.Path
if protocol != "unix" {
protocol = "tcp"
address = c.endpointURL.Host
}
dial, err := net.Dial(protocol, address)
if err != nil {
return err
}
clientconn := httputil.NewClientConn(dial, nil)
clientconn.Do(req)
defer clientconn.Close()
rwc, br := clientconn.Hijack()
defer rwc.Close()
errStdout := make(chan error, 1)
go func() {
var err error
if setRawTerminal {
_, err = io.Copy(out, br)
} else {
_, err = utils.StdCopy(out, errStream, br)
}
errStdout <- err
}()
if inFile, ok := in.(*os.File); ok && setRawTerminal && term.IsTerminal(inFile.Fd()) && os.Getenv("NORAW") == "" {
oldState, err := term.SetRawTerminal(inFile.Fd())
if err != nil {
return err
}
defer term.RestoreTerminal(inFile.Fd(), oldState)
}
go func() {
if in != nil {
io.Copy(rwc, in)
}
if err := rwc.(interface {
CloseWrite() error
}).CloseWrite(); err != nil && errStream != nil {
fmt.Fprintf(errStream, "Couldn't send EOF: %s\n", err)
}
}()
if err := <-errStdout; err != nil {
return err
}
return nil
}
func CmdPrompt(args []string, stdout, stderr io.Writer, in beam.Receiver, out beam.Sender) {
if len(args) < 2 {
fmt.Fprintf(stderr, "usage: %s PROMPT...\n", args[0])
return
}
if !term.IsTerminal(0) {
fmt.Fprintf(stderr, "can't prompt: no tty available...\n")
return
}
fmt.Printf("%s: ", strings.Join(args[1:], " "))
oldState, _ := term.SaveState(0)
term.DisableEcho(0, oldState)
line, _, err := bufio.NewReader(os.Stdin).ReadLine()
if err != nil {
fmt.Fprintln(stderr, err.Error())
return
}
val := string(line)
fmt.Printf("\n")
term.RestoreTerminal(0, oldState)
out.Send(data.Empty().Set("fromcmd", args...).Set("value", val).Bytes(), nil)
}
func (c *Client) stream(method, path string, in io.Reader, out io.Writer, headers http.Header) error {
if (method == "POST" || method == "PUT") && in == nil {
in = bytes.NewReader(nil)
}
// setup the request
req, err := http.NewRequest(method, fmt.Sprintf("/v%g%s", APIVERSION, path), in)
if err != nil {
return err
}
// set default headers
req.Header = headers
req.Header.Set("User-Agent", "Docker-Client/0.6.4")
req.Header.Set("Content-Type", "plain/text")
// dial the host server
req.Host = c.addr
dial, err := net.Dial(c.proto, c.addr)
if err != nil {
return err
}
// make the request
conn := httputil.NewClientConn(dial, nil)
resp, err := conn.Do(req)
defer conn.Close()
if err != nil {
return err
}
// make sure we defer close the body
defer resp.Body.Close()
// Check for an http error status (ie not 200 StatusOK)
switch resp.StatusCode {
case 404:
return ErrNotFound
case 403:
return ErrForbidden
case 401:
return ErrNotAuthorized
case 400:
return ErrBadRequest
}
// If no output we exit now with no errors
if out == nil {
return nil
}
// copy the output stream to the writer
if resp.Header.Get("Content-Type") == "application/json" {
var terminalFd = os.Stdin.Fd()
var isTerminal = term.IsTerminal(terminalFd)
// it may not make sense to put this code here, but it works for
// us at the moment, and I don't feel like refactoring
return utils.DisplayJSONMessagesStream(resp.Body, out, terminalFd, isTerminal)
}
// otherwise plain text
if _, err := io.Copy(out, resp.Body); err != nil {
return err
}
return nil
}
func main() {
fd3 := os.NewFile(3, "beam-introspect")
if introsp, err := beam.FileConn(fd3); err == nil {
introspect = introsp
Logf("introspection enabled\n")
} else {
Logf("introspection disabled\n")
}
fd3.Close()
flag.BoolVar(&flX, "x", false, "print commands as they are being executed")
flag.Parse()
if flag.NArg() == 0 {
if term.IsTerminal(0) {
// No arguments, stdin is terminal --> interactive mode
input := bufio.NewScanner(os.Stdin)
for {
fmt.Printf("[%d] beamsh> ", os.Getpid())
if !input.Scan() {
break
}
line := input.Text()
if len(line) != 0 {
cmd, err := dockerscript.Parse(strings.NewReader(line))
if err != nil {
fmt.Fprintf(os.Stderr, "error: %v\n", err)
continue
}
if err := executeRootScript(cmd); err != nil {
Fatal(err)
}
}
if err := input.Err(); err == io.EOF {
break
} else if err != nil {
Fatal(err)
}
}
} else {
// No arguments, stdin not terminal --> batch mode
script, err := dockerscript.Parse(os.Stdin)
if err != nil {
Fatal("parse error: %v\n", err)
}
if err := executeRootScript(script); err != nil {
Fatal(err)
}
}
} else {
// 1+ arguments: parse them as script files
for _, scriptpath := range flag.Args() {
f, err := os.Open(scriptpath)
if err != nil {
Fatal(err)
}
script, err := dockerscript.Parse(f)
if err != nil {
Fatal("parse error: %v\n", err)
}
if err := executeRootScript(script); err != nil {
Fatal(err)
}
}
}
}
func init() {
if term.IsTerminal(1) {
Colorize = true
}
}