391 lines
9.9 KiB
Go
391 lines
9.9 KiB
Go
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package client
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import (
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"bytes"
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"crypto/tls"
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"encoding/base64"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"net"
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"net/http"
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"net/http/httputil"
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"net/url"
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"os"
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gosignal "os/signal"
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"regexp"
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goruntime "runtime"
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"strconv"
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"strings"
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"syscall"
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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/engine"
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"github.com/dotcloud/docker/pkg/term"
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"github.com/dotcloud/docker/registry"
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"github.com/dotcloud/docker/utils"
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)
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var (
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ErrConnectionRefused = errors.New("Cannot connect to the Docker daemon. Is 'docker -d' running on this host?")
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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) call(method, path string, data interface{}, passAuthInfo bool) (io.ReadCloser, int, error) {
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params := bytes.NewBuffer(nil)
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if data != nil {
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if env, ok := data.(engine.Env); ok {
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if err := env.Encode(params); err != nil {
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return nil, -1, err
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}
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} else {
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buf, err := json.Marshal(data)
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if err != nil {
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return nil, -1, err
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}
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if _, err := params.Write(buf); err != nil {
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return nil, -1, err
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}
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}
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}
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// fixme: refactor client to support redirect
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re := regexp.MustCompile("/+")
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path = re.ReplaceAllString(path, "/")
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req, err := http.NewRequest(method, fmt.Sprintf("/v%s%s", api.APIVERSION, path), params)
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if err != nil {
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return nil, -1, err
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}
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if passAuthInfo {
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cli.LoadConfigFile()
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// Resolve the Auth config relevant for this server
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authConfig := cli.configFile.ResolveAuthConfig(registry.IndexServerAddress())
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getHeaders := func(authConfig registry.AuthConfig) (map[string][]string, error) {
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buf, err := json.Marshal(authConfig)
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if err != nil {
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return nil, err
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}
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registryAuthHeader := []string{
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base64.URLEncoding.EncodeToString(buf),
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}
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return map[string][]string{"X-Registry-Auth": registryAuthHeader}, nil
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}
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if headers, err := getHeaders(authConfig); err == nil && headers != nil {
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for k, v := range headers {
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req.Header[k] = v
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}
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}
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}
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req.Header.Set("User-Agent", "Docker-Client/"+dockerversion.VERSION)
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req.Host = cli.addr
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if data != nil {
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req.Header.Set("Content-Type", "application/json")
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} else if method == "POST" {
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req.Header.Set("Content-Type", "plain/text")
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}
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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 nil, -1, ErrConnectionRefused
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}
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return nil, -1, err
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}
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clientconn := httputil.NewClientConn(dial, nil)
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resp, err := clientconn.Do(req)
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if err != nil {
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clientconn.Close()
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if strings.Contains(err.Error(), "connection refused") {
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return nil, -1, ErrConnectionRefused
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}
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return nil, -1, err
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}
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if resp.StatusCode < 200 || resp.StatusCode >= 400 {
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return nil, -1, err
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}
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if len(body) == 0 {
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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)
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}
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return nil, resp.StatusCode, fmt.Errorf("Error: %s", bytes.TrimSpace(body))
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}
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wrapper := utils.NewReadCloserWrapper(resp.Body, func() error {
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if resp != nil && resp.Body != nil {
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resp.Body.Close()
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}
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return clientconn.Close()
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})
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return wrapper, resp.StatusCode, nil
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}
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func (cli *DockerCli) stream(method, path string, in io.Reader, out io.Writer, headers map[string][]string) error {
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if (method == "POST" || method == "PUT") && in == nil {
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in = bytes.NewReader([]byte{})
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}
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// fixme: refactor client to support redirect
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re := regexp.MustCompile("/+")
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path = re.ReplaceAllString(path, "/")
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req, err := http.NewRequest(method, fmt.Sprintf("/v%s%s", api.APIVERSION, path), in)
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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.Host = cli.addr
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if method == "POST" {
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req.Header.Set("Content-Type", "plain/text")
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}
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if headers != nil {
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for k, v := range headers {
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req.Header[k] = v
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}
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}
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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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resp, err := clientconn.Do(req)
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defer clientconn.Close()
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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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defer resp.Body.Close()
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if resp.StatusCode < 200 || resp.StatusCode >= 400 {
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return err
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}
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if len(body) == 0 {
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return fmt.Errorf("Error :%s", http.StatusText(resp.StatusCode))
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}
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return fmt.Errorf("Error: %s", bytes.TrimSpace(body))
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}
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if api.MatchesContentType(resp.Header.Get("Content-Type"), "application/json") {
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return utils.DisplayJSONMessagesStream(resp.Body, out, cli.terminalFd, cli.isTerminal)
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}
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if _, err := io.Copy(out, resp.Body); err != nil {
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return err
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}
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return nil
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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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// fixme: refactor client to support redirect
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re := regexp.MustCompile("/+")
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path = re.ReplaceAllString(path, "/")
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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 goruntime.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.Errorf("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.Errorf("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.Errorf("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.Errorf("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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func (cli *DockerCli) resizeTty(id string) {
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height, width := cli.getTtySize()
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if height == 0 && width == 0 {
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return
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}
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v := url.Values{}
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v.Set("h", strconv.Itoa(height))
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v.Set("w", strconv.Itoa(width))
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if _, _, err := readBody(cli.call("POST", "/containers/"+id+"/resize?"+v.Encode(), nil, false)); err != nil {
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utils.Errorf("Error resize: %s", err)
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}
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}
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func waitForExit(cli *DockerCli, containerId string) (int, error) {
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stream, _, err := cli.call("POST", "/containers/"+containerId+"/wait", nil, false)
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if err != nil {
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return -1, err
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}
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var out engine.Env
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if err := out.Decode(stream); err != nil {
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return -1, err
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}
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return out.GetInt("StatusCode"), nil
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}
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// getExitCode perform an inspect on the container. It returns
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// the running state and the exit code.
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func getExitCode(cli *DockerCli, containerId string) (bool, int, error) {
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body, _, err := readBody(cli.call("GET", "/containers/"+containerId+"/json", nil, false))
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if err != nil {
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// If we can't connect, then the daemon probably died.
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if err != ErrConnectionRefused {
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return false, -1, err
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}
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return false, -1, nil
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}
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c := &api.Container{}
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if err := json.Unmarshal(body, c); err != nil {
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return false, -1, err
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}
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return c.State.Running, c.State.ExitCode, nil
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}
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func (cli *DockerCli) monitorTtySize(id string) error {
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cli.resizeTty(id)
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sigchan := make(chan os.Signal, 1)
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gosignal.Notify(sigchan, syscall.SIGWINCH)
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go func() {
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for _ = range sigchan {
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cli.resizeTty(id)
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}
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}()
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return nil
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}
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func (cli *DockerCli) getTtySize() (int, int) {
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if !cli.isTerminal {
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return 0, 0
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}
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ws, err := term.GetWinsize(cli.terminalFd)
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if err != nil {
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utils.Errorf("Error getting size: %s", err)
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if ws == nil {
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return 0, 0
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}
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}
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return int(ws.Height), int(ws.Width)
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}
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func readBody(stream io.ReadCloser, statusCode int, err error) ([]byte, int, error) {
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|
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
|
||
|
|
}
|