mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
296 lines
7.8 KiB
Go
296 lines
7.8 KiB
Go
package client
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/base64"
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"net/url"
|
|
"os"
|
|
gosignal "os/signal"
|
|
"strconv"
|
|
"strings"
|
|
|
|
log "github.com/Sirupsen/logrus"
|
|
"github.com/docker/docker/api"
|
|
"github.com/docker/docker/autogen/dockerversion"
|
|
"github.com/docker/docker/engine"
|
|
"github.com/docker/docker/pkg/signal"
|
|
"github.com/docker/docker/pkg/stdcopy"
|
|
"github.com/docker/docker/pkg/term"
|
|
"github.com/docker/docker/registry"
|
|
"github.com/docker/docker/utils"
|
|
)
|
|
|
|
var (
|
|
ErrConnectionRefused = errors.New("Cannot connect to the Docker daemon. Is 'docker -d' running on this host?")
|
|
)
|
|
|
|
func (cli *DockerCli) HTTPClient() *http.Client {
|
|
return &http.Client{Transport: cli.transport}
|
|
}
|
|
|
|
func (cli *DockerCli) encodeData(data interface{}) (*bytes.Buffer, error) {
|
|
params := bytes.NewBuffer(nil)
|
|
if data != nil {
|
|
if env, ok := data.(engine.Env); ok {
|
|
if err := env.Encode(params); err != nil {
|
|
return nil, err
|
|
}
|
|
} else {
|
|
buf, err := json.Marshal(data)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if _, err := params.Write(buf); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
}
|
|
return params, nil
|
|
}
|
|
|
|
func (cli *DockerCli) call(method, path string, data interface{}, passAuthInfo bool) (io.ReadCloser, int, error) {
|
|
params, err := cli.encodeData(data)
|
|
if err != nil {
|
|
return nil, -1, err
|
|
}
|
|
req, err := http.NewRequest(method, fmt.Sprintf("/v%s%s", api.APIVERSION, path), params)
|
|
if err != nil {
|
|
return nil, -1, err
|
|
}
|
|
if passAuthInfo {
|
|
cli.LoadConfigFile()
|
|
// Resolve the Auth config relevant for this server
|
|
authConfig := cli.configFile.Configs[registry.IndexServerAddress()]
|
|
getHeaders := func(authConfig registry.AuthConfig) (map[string][]string, error) {
|
|
buf, err := json.Marshal(authConfig)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
registryAuthHeader := []string{
|
|
base64.URLEncoding.EncodeToString(buf),
|
|
}
|
|
return map[string][]string{"X-Registry-Auth": registryAuthHeader}, nil
|
|
}
|
|
if headers, err := getHeaders(authConfig); err == nil && headers != nil {
|
|
for k, v := range headers {
|
|
req.Header[k] = v
|
|
}
|
|
}
|
|
}
|
|
req.Header.Set("User-Agent", "Docker-Client/"+dockerversion.VERSION)
|
|
req.URL.Host = cli.addr
|
|
req.URL.Scheme = cli.scheme
|
|
if data != nil {
|
|
req.Header.Set("Content-Type", "application/json")
|
|
} else if method == "POST" {
|
|
req.Header.Set("Content-Type", "text/plain")
|
|
}
|
|
resp, err := cli.HTTPClient().Do(req)
|
|
if err != nil {
|
|
if strings.Contains(err.Error(), "connection refused") {
|
|
return nil, -1, ErrConnectionRefused
|
|
}
|
|
|
|
if cli.tlsConfig == nil {
|
|
return nil, -1, fmt.Errorf("%v. Are you trying to connect to a TLS-enabled daemon without TLS?", err)
|
|
}
|
|
return nil, -1, fmt.Errorf("An error occurred trying to connect: %v", err)
|
|
|
|
}
|
|
|
|
if resp.StatusCode < 200 || resp.StatusCode >= 400 {
|
|
body, err := ioutil.ReadAll(resp.Body)
|
|
if err != nil {
|
|
return nil, -1, err
|
|
}
|
|
if len(body) == 0 {
|
|
return nil, resp.StatusCode, fmt.Errorf("Error: request returned %s for API route and version %s, check if the server supports the requested API version", http.StatusText(resp.StatusCode), req.URL)
|
|
}
|
|
return nil, resp.StatusCode, fmt.Errorf("Error response from daemon: %s", bytes.TrimSpace(body))
|
|
}
|
|
|
|
return resp.Body, resp.StatusCode, nil
|
|
}
|
|
|
|
func (cli *DockerCli) stream(method, path string, in io.Reader, out io.Writer, headers map[string][]string) error {
|
|
return cli.streamHelper(method, path, true, in, out, nil, headers)
|
|
}
|
|
|
|
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("/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", "text/plain")
|
|
}
|
|
|
|
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.outFd, cli.isTerminalOut)
|
|
}
|
|
if stdout != nil || stderr != nil {
|
|
// When TTY is ON, use regular copy
|
|
if setRawTerminal {
|
|
_, err = io.Copy(stdout, resp.Body)
|
|
} else {
|
|
_, err = stdcopy.StdCopy(stdout, stderr, resp.Body)
|
|
}
|
|
log.Debugf("[stream] End of stdout")
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (cli *DockerCli) resizeTty(id string, isExec bool) {
|
|
height, width := cli.getTtySize()
|
|
if height == 0 && width == 0 {
|
|
return
|
|
}
|
|
v := url.Values{}
|
|
v.Set("h", strconv.Itoa(height))
|
|
v.Set("w", strconv.Itoa(width))
|
|
|
|
path := ""
|
|
if !isExec {
|
|
path = "/containers/" + id + "/resize?"
|
|
} else {
|
|
path = "/exec/" + id + "/resize?"
|
|
}
|
|
|
|
if _, _, err := readBody(cli.call("POST", path+v.Encode(), nil, false)); err != nil {
|
|
log.Debugf("Error resize: %s", err)
|
|
}
|
|
}
|
|
|
|
func waitForExit(cli *DockerCli, containerId string) (int, error) {
|
|
stream, _, err := cli.call("POST", "/containers/"+containerId+"/wait", nil, false)
|
|
if err != nil {
|
|
return -1, err
|
|
}
|
|
|
|
var out engine.Env
|
|
if err := out.Decode(stream); err != nil {
|
|
return -1, err
|
|
}
|
|
return out.GetInt("StatusCode"), nil
|
|
}
|
|
|
|
// getExitCode perform an inspect on the container. It returns
|
|
// the running state and the exit code.
|
|
func getExitCode(cli *DockerCli, containerId string) (bool, int, error) {
|
|
stream, _, err := cli.call("GET", "/containers/"+containerId+"/json", nil, false)
|
|
if err != nil {
|
|
// If we can't connect, then the daemon probably died.
|
|
if err != ErrConnectionRefused {
|
|
return false, -1, err
|
|
}
|
|
return false, -1, nil
|
|
}
|
|
|
|
var result engine.Env
|
|
if err := result.Decode(stream); err != nil {
|
|
return false, -1, err
|
|
}
|
|
|
|
state := result.GetSubEnv("State")
|
|
return state.GetBool("Running"), state.GetInt("ExitCode"), nil
|
|
}
|
|
|
|
// getExecExitCode perform an inspect on the exec command. It returns
|
|
// the running state and the exit code.
|
|
func getExecExitCode(cli *DockerCli, execId string) (bool, int, error) {
|
|
stream, _, err := cli.call("GET", "/exec/"+execId+"/json", nil, false)
|
|
if err != nil {
|
|
// If we can't connect, then the daemon probably died.
|
|
if err != ErrConnectionRefused {
|
|
return false, -1, err
|
|
}
|
|
return false, -1, nil
|
|
}
|
|
|
|
var result engine.Env
|
|
if err := result.Decode(stream); err != nil {
|
|
return false, -1, err
|
|
}
|
|
|
|
return result.GetBool("Running"), result.GetInt("ExitCode"), nil
|
|
}
|
|
|
|
func (cli *DockerCli) monitorTtySize(id string, isExec bool) error {
|
|
cli.resizeTty(id, isExec)
|
|
|
|
sigchan := make(chan os.Signal, 1)
|
|
gosignal.Notify(sigchan, signal.SIGWINCH)
|
|
go func() {
|
|
for _ = range sigchan {
|
|
cli.resizeTty(id, isExec)
|
|
}
|
|
}()
|
|
return nil
|
|
}
|
|
|
|
func (cli *DockerCli) getTtySize() (int, int) {
|
|
if !cli.isTerminalOut {
|
|
return 0, 0
|
|
}
|
|
ws, err := term.GetWinsize(cli.outFd)
|
|
if err != nil {
|
|
log.Debugf("Error getting size: %s", err)
|
|
if ws == nil {
|
|
return 0, 0
|
|
}
|
|
}
|
|
return int(ws.Height), int(ws.Width)
|
|
}
|
|
|
|
func readBody(stream io.ReadCloser, statusCode int, err error) ([]byte, int, error) {
|
|
if stream != nil {
|
|
defer stream.Close()
|
|
}
|
|
if err != nil {
|
|
return nil, statusCode, err
|
|
}
|
|
body, err := ioutil.ReadAll(stream)
|
|
if err != nil {
|
|
return nil, -1, err
|
|
}
|
|
return body, statusCode, nil
|
|
}
|