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moby--moby/api.go
Victor Vieux 16ca6a1c12 move legacy stuff outside the job
Docker-DCO-1.1-Signed-off-by: Victor Vieux <victor.vieux@docker.com> (github: vieux)
2014-01-13 16:20:05 -08:00

1246 lines
34 KiB
Go

package docker
import (
"bufio"
"bytes"
"code.google.com/p/go.net/websocket"
"encoding/base64"
"encoding/json"
"expvar"
"fmt"
"github.com/dotcloud/docker/archive"
"github.com/dotcloud/docker/auth"
"github.com/dotcloud/docker/engine"
"github.com/dotcloud/docker/pkg/systemd"
"github.com/dotcloud/docker/utils"
"github.com/gorilla/mux"
"io"
"io/ioutil"
"log"
"mime"
"net"
"net/http"
"net/http/pprof"
"os"
"os/exec"
"regexp"
"strconv"
"strings"
)
const (
APIVERSION = 1.9
DEFAULTHTTPHOST = "127.0.0.1"
DEFAULTHTTPPORT = 4243
DEFAULTUNIXSOCKET = "/var/run/docker.sock"
)
type HttpApiFunc func(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error
func hijackServer(w http.ResponseWriter) (io.ReadCloser, io.Writer, error) {
conn, _, err := w.(http.Hijacker).Hijack()
if err != nil {
return nil, nil, err
}
// Flush the options to make sure the client sets the raw mode
conn.Write([]byte{})
return conn, conn, nil
}
//If we don't do this, POST method without Content-type (even with empty body) will fail
func parseForm(r *http.Request) error {
if r == nil {
return nil
}
if err := r.ParseForm(); err != nil && !strings.HasPrefix(err.Error(), "mime:") {
return err
}
return nil
}
func parseMultipartForm(r *http.Request) error {
if err := r.ParseMultipartForm(4096); err != nil && !strings.HasPrefix(err.Error(), "mime:") {
return err
}
return nil
}
func httpError(w http.ResponseWriter, err error) {
statusCode := http.StatusInternalServerError
// FIXME: this is brittle and should not be necessary.
// If we need to differentiate between different possible error types, we should
// create appropriate error types with clearly defined meaning.
if strings.Contains(err.Error(), "No such") {
statusCode = http.StatusNotFound
} else if strings.Contains(err.Error(), "Bad parameter") {
statusCode = http.StatusBadRequest
} else if strings.Contains(err.Error(), "Conflict") {
statusCode = http.StatusConflict
} else if strings.Contains(err.Error(), "Impossible") {
statusCode = http.StatusNotAcceptable
} else if strings.Contains(err.Error(), "Wrong login/password") {
statusCode = http.StatusUnauthorized
} else if strings.Contains(err.Error(), "hasn't been activated") {
statusCode = http.StatusForbidden
}
if err != nil {
utils.Errorf("HTTP Error: statusCode=%d %s", statusCode, err.Error())
http.Error(w, err.Error(), statusCode)
}
}
func writeJSON(w http.ResponseWriter, code int, v interface{}) error {
b, err := json.Marshal(v)
if err != nil {
return err
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(code)
w.Write(b)
return nil
}
func getBoolParam(value string) (bool, error) {
if value == "" {
return false, nil
}
ret, err := strconv.ParseBool(value)
if err != nil {
return false, fmt.Errorf("Bad parameter")
}
return ret, nil
}
func matchesContentType(contentType, expectedType string) bool {
mimetype, _, err := mime.ParseMediaType(contentType)
if err != nil {
utils.Errorf("Error parsing media type: %s error: %s", contentType, err.Error())
}
return err == nil && mimetype == expectedType
}
func postAuth(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
authConfig := &auth.AuthConfig{}
err := json.NewDecoder(r.Body).Decode(authConfig)
if err != nil {
return err
}
status, err := auth.Login(authConfig, srv.HTTPRequestFactory(nil))
if err != nil {
return err
}
if status != "" {
return writeJSON(w, http.StatusOK, &APIAuth{Status: status})
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func getVersion(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
w.Header().Set("Content-Type", "application/json")
srv.Eng.ServeHTTP(w, r)
return nil
}
func postContainersKill(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if vars == nil {
return fmt.Errorf("Missing parameter")
}
if err := parseForm(r); err != nil {
return err
}
job := srv.Eng.Job("kill", vars["name"])
if sig := r.Form.Get("signal"); sig != "" {
job.Args = append(job.Args, sig)
}
if err := job.Run(); err != nil {
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func getContainersExport(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if vars == nil {
return fmt.Errorf("Missing parameter")
}
job := srv.Eng.Job("export", vars["name"])
if err := job.Stdout.Add(w); err != nil {
return err
}
if err := job.Run(); err != nil {
return err
}
return nil
}
func getImagesJSON(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
var (
buffer *bytes.Buffer
job = srv.Eng.Job("images")
)
job.Setenv("filter", r.Form.Get("filter"))
job.Setenv("all", r.Form.Get("all"))
if version >= 1.9 {
job.Stdout.Add(w)
} else {
buffer = bytes.NewBuffer(nil)
job.Stdout.Add(buffer)
}
if err := job.Run(); err != nil {
return err
}
if version < 1.9 { // Send as a valide JSON array
outs := engine.NewTable("Created", 0)
if _, err := outs.ReadFrom(buffer); err != nil {
return err
}
if version < 1.8 { // Convert to legacy format
outsLegacy := engine.NewTable("Created", 0)
for _, out := range outs.Data {
for _, repoTag := range out.GetList("RepoTags") {
parts := strings.Split(repoTag, ":")
outLegacy := &engine.Env{}
outLegacy.Set("Repository", parts[0])
outLegacy.Set("Tag", parts[1])
outLegacy.Set("ID", out.Get("ID"))
outLegacy.SetInt64("Created", out.GetInt64("Created"))
outLegacy.SetInt64("Size", out.GetInt64("Size"))
outLegacy.SetInt64("VirtualSize", out.GetInt64("VirtualSize"))
outsLegacy.Add(outLegacy)
}
}
if _, err := outsLegacy.WriteListTo(w); err != nil {
return err
}
} else if _, err := outs.WriteListTo(w); err != nil {
return err
}
}
return nil
}
func getImagesViz(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if version > 1.6 {
w.WriteHeader(http.StatusNotFound)
return fmt.Errorf("This is now implemented in the client.")
}
if err := srv.ImagesViz(w); err != nil {
return err
}
return nil
}
func getInfo(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
w.Header().Set("Content-Type", "application/json")
srv.Eng.ServeHTTP(w, r)
return nil
}
func getEvents(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
sendEvent := func(wf *utils.WriteFlusher, event *utils.JSONMessage) error {
b, err := json.Marshal(event)
if err != nil {
return fmt.Errorf("JSON error")
}
_, err = wf.Write(b)
if err != nil {
// On error, evict the listener
utils.Errorf("%s", err)
srv.Lock()
delete(srv.listeners, r.RemoteAddr)
srv.Unlock()
return err
}
return nil
}
if err := parseForm(r); err != nil {
return err
}
listener := make(chan utils.JSONMessage)
srv.Lock()
srv.listeners[r.RemoteAddr] = listener
srv.Unlock()
since, err := strconv.ParseInt(r.Form.Get("since"), 10, 0)
if err != nil {
since = 0
}
w.Header().Set("Content-Type", "application/json")
wf := utils.NewWriteFlusher(w)
wf.Flush()
if since != 0 {
// If since, send previous events that happened after the timestamp
for _, event := range srv.GetEvents() {
if event.Time >= since {
err := sendEvent(wf, &event)
if err != nil && err.Error() == "JSON error" {
continue
}
if err != nil {
return err
}
}
}
}
for event := range listener {
err := sendEvent(wf, &event)
if err != nil && err.Error() == "JSON error" {
continue
}
if err != nil {
return err
}
}
return nil
}
func getImagesHistory(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if vars == nil {
return fmt.Errorf("Missing parameter")
}
name := vars["name"]
outs, err := srv.ImageHistory(name)
if err != nil {
return err
}
return writeJSON(w, http.StatusOK, outs)
}
func getContainersChanges(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if vars == nil {
return fmt.Errorf("Missing parameter")
}
name := vars["name"]
changesStr, err := srv.ContainerChanges(name)
if err != nil {
return err
}
return writeJSON(w, http.StatusOK, changesStr)
}
func getContainersTop(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if version < 1.4 {
return fmt.Errorf("top was improved a lot since 1.3, Please upgrade your docker client.")
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
if err := parseForm(r); err != nil {
return err
}
procsStr, err := srv.ContainerTop(vars["name"], r.Form.Get("ps_args"))
if err != nil {
return err
}
return writeJSON(w, http.StatusOK, procsStr)
}
func getContainersJSON(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
all, err := getBoolParam(r.Form.Get("all"))
if err != nil {
return err
}
size, err := getBoolParam(r.Form.Get("size"))
if err != nil {
return err
}
since := r.Form.Get("since")
before := r.Form.Get("before")
n, err := strconv.Atoi(r.Form.Get("limit"))
if err != nil {
n = -1
}
outs := srv.Containers(all, size, n, since, before)
if version < 1.5 {
outs2 := []APIContainersOld{}
for _, ctnr := range outs {
outs2 = append(outs2, *ctnr.ToLegacy())
}
return writeJSON(w, http.StatusOK, outs2)
}
return writeJSON(w, http.StatusOK, outs)
}
func postImagesTag(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
job := srv.Eng.Job("tag", vars["name"], r.Form.Get("repo"), r.Form.Get("tag"))
job.Setenv("force", r.Form.Get("force"))
if err := job.Run(); err != nil {
return err
}
w.WriteHeader(http.StatusCreated)
return nil
}
func postCommit(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
config := &Config{}
if err := json.NewDecoder(r.Body).Decode(config); err != nil && err != io.EOF {
utils.Errorf("%s", err)
}
job := srv.Eng.Job("commit", r.Form.Get("container"))
job.Setenv("repo", r.Form.Get("repo"))
job.Setenv("tag", r.Form.Get("tag"))
job.Setenv("author", r.Form.Get("author"))
job.Setenv("comment", r.Form.Get("comment"))
job.SetenvJson("config", config)
var id string
job.Stdout.AddString(&id)
if err := job.Run(); err != nil {
return err
}
return writeJSON(w, http.StatusCreated, &APIID{id})
}
// Creates an image from Pull or from Import
func postImagesCreate(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
src := r.Form.Get("fromSrc")
image := r.Form.Get("fromImage")
tag := r.Form.Get("tag")
repo := r.Form.Get("repo")
authEncoded := r.Header.Get("X-Registry-Auth")
authConfig := &auth.AuthConfig{}
if authEncoded != "" {
authJson := base64.NewDecoder(base64.URLEncoding, strings.NewReader(authEncoded))
if err := json.NewDecoder(authJson).Decode(authConfig); err != nil {
// for a pull it is not an error if no auth was given
// to increase compatibility with the existing api it is defaulting to be empty
authConfig = &auth.AuthConfig{}
}
}
if version > 1.0 {
w.Header().Set("Content-Type", "application/json")
}
sf := utils.NewStreamFormatter(version > 1.0)
if image != "" { //pull
metaHeaders := map[string][]string{}
for k, v := range r.Header {
if strings.HasPrefix(k, "X-Meta-") {
metaHeaders[k] = v
}
}
if err := srv.ImagePull(image, tag, w, sf, authConfig, metaHeaders, version > 1.3); err != nil {
if sf.Used() {
w.Write(sf.FormatError(err))
return nil
}
return err
}
} else { //import
if err := srv.ImageImport(src, repo, tag, r.Body, w, sf); err != nil {
if sf.Used() {
w.Write(sf.FormatError(err))
return nil
}
return err
}
}
return nil
}
func getImagesSearch(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
term := r.Form.Get("term")
outs, err := srv.ImagesSearch(term)
if err != nil {
return err
}
return writeJSON(w, http.StatusOK, outs)
}
func postImagesInsert(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
url := r.Form.Get("url")
path := r.Form.Get("path")
if vars == nil {
return fmt.Errorf("Missing parameter")
}
name := vars["name"]
if version > 1.0 {
w.Header().Set("Content-Type", "application/json")
}
sf := utils.NewStreamFormatter(version > 1.0)
err := srv.ImageInsert(name, url, path, w, sf)
if err != nil {
if sf.Used() {
w.Write(sf.FormatError(err))
return nil
}
return err
}
return nil
}
func postImagesPush(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
metaHeaders := map[string][]string{}
for k, v := range r.Header {
if strings.HasPrefix(k, "X-Meta-") {
metaHeaders[k] = v
}
}
if err := parseForm(r); err != nil {
return err
}
authConfig := &auth.AuthConfig{}
authEncoded := r.Header.Get("X-Registry-Auth")
if authEncoded != "" {
// the new format is to handle the authConfig as a header
authJson := base64.NewDecoder(base64.URLEncoding, strings.NewReader(authEncoded))
if err := json.NewDecoder(authJson).Decode(authConfig); err != nil {
// to increase compatibility to existing api it is defaulting to be empty
authConfig = &auth.AuthConfig{}
}
} else {
// the old format is supported for compatibility if there was no authConfig header
if err := json.NewDecoder(r.Body).Decode(authConfig); err != nil {
return err
}
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
name := vars["name"]
if version > 1.0 {
w.Header().Set("Content-Type", "application/json")
}
sf := utils.NewStreamFormatter(version > 1.0)
if err := srv.ImagePush(name, w, sf, authConfig, metaHeaders); err != nil {
if sf.Used() {
w.Write(sf.FormatError(err))
return nil
}
return err
}
return nil
}
func getImagesGet(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if vars == nil {
return fmt.Errorf("Missing parameter")
}
if version > 1.0 {
w.Header().Set("Content-Type", "application/x-tar")
}
job := srv.Eng.Job("image_export", vars["name"])
if err := job.Stdout.Add(w); err != nil {
return err
}
return job.Run()
}
func postImagesLoad(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
return srv.ImageLoad(r.Body)
}
func postContainersCreate(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return nil
}
out := &APIRun{}
job := srv.Eng.Job("create", r.Form.Get("name"))
if err := job.DecodeEnv(r.Body); err != nil {
return err
}
resolvConf, err := utils.GetResolvConf()
if err != nil {
return err
}
if !job.GetenvBool("NetworkDisabled") && len(job.Getenv("Dns")) == 0 && len(srv.runtime.config.Dns) == 0 && utils.CheckLocalDns(resolvConf) {
out.Warnings = append(out.Warnings, fmt.Sprintf("Docker detected local DNS server on resolv.conf. Using default external servers: %v", defaultDns))
job.SetenvList("Dns", defaultDns)
}
// Read container ID from the first line of stdout
job.Stdout.AddString(&out.ID)
// Read warnings from stderr
warnings := &bytes.Buffer{}
job.Stderr.Add(warnings)
if err := job.Run(); err != nil {
return err
}
// Parse warnings from stderr
scanner := bufio.NewScanner(warnings)
for scanner.Scan() {
out.Warnings = append(out.Warnings, scanner.Text())
}
if job.GetenvInt("Memory") > 0 && !srv.runtime.capabilities.MemoryLimit {
log.Println("WARNING: Your kernel does not support memory limit capabilities. Limitation discarded.")
out.Warnings = append(out.Warnings, "Your kernel does not support memory limit capabilities. Limitation discarded.")
}
if job.GetenvInt("Memory") > 0 && !srv.runtime.capabilities.SwapLimit {
log.Println("WARNING: Your kernel does not support swap limit capabilities. Limitation discarded.")
out.Warnings = append(out.Warnings, "Your kernel does not support memory swap capabilities. Limitation discarded.")
}
if !job.GetenvBool("NetworkDisabled") && srv.runtime.capabilities.IPv4ForwardingDisabled {
log.Println("Warning: IPv4 forwarding is disabled.")
out.Warnings = append(out.Warnings, "IPv4 forwarding is disabled.")
}
return writeJSON(w, http.StatusCreated, out)
}
func postContainersRestart(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
job := srv.Eng.Job("restart", vars["name"])
job.Setenv("t", r.Form.Get("t"))
if err := job.Run(); err != nil {
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func deleteContainers(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
job := srv.Eng.Job("container_delete", vars["name"])
job.Setenv("removeVolume", r.Form.Get("v"))
job.Setenv("removeLink", r.Form.Get("link"))
if err := job.Run(); err != nil {
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func deleteImages(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
name := vars["name"]
imgs, err := srv.ImageDelete(name, version > 1.1)
if err != nil {
return err
}
if imgs != nil {
if len(imgs) != 0 {
return writeJSON(w, http.StatusOK, imgs)
}
return fmt.Errorf("Conflict, %s wasn't deleted", name)
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func postContainersStart(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if vars == nil {
return fmt.Errorf("Missing parameter")
}
name := vars["name"]
job := srv.Eng.Job("start", name)
// allow a nil body for backwards compatibility
if r.Body != nil {
if matchesContentType(r.Header.Get("Content-Type"), "application/json") {
if err := job.DecodeEnv(r.Body); err != nil {
return err
}
}
}
if err := job.Run(); err != nil {
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func postContainersStop(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
job := srv.Eng.Job("stop", vars["name"])
job.Setenv("t", r.Form.Get("t"))
if err := job.Run(); err != nil {
return err
}
w.WriteHeader(http.StatusNoContent)
return nil
}
func postContainersWait(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if vars == nil {
return fmt.Errorf("Missing parameter")
}
job := srv.Eng.Job("wait", vars["name"])
var statusStr string
job.Stdout.AddString(&statusStr)
if err := job.Run(); err != nil {
return err
}
// Parse a 16-bit encoded integer to map typical unix exit status.
status, err := strconv.ParseInt(statusStr, 10, 16)
if err != nil {
return err
}
return writeJSON(w, http.StatusOK, &APIWait{StatusCode: int(status)})
}
func postContainersResize(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
if err := srv.Eng.Job("resize", vars["name"], r.Form.Get("h"), r.Form.Get("w")).Run(); err != nil {
return err
}
return nil
}
func postContainersAttach(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
logs, err := getBoolParam(r.Form.Get("logs"))
if err != nil {
return err
}
stream, err := getBoolParam(r.Form.Get("stream"))
if err != nil {
return err
}
stdin, err := getBoolParam(r.Form.Get("stdin"))
if err != nil {
return err
}
stdout, err := getBoolParam(r.Form.Get("stdout"))
if err != nil {
return err
}
stderr, err := getBoolParam(r.Form.Get("stderr"))
if err != nil {
return err
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
name := vars["name"]
c, err := srv.ContainerInspect(name)
if err != nil {
return err
}
inStream, outStream, err := hijackServer(w)
if err != nil {
return err
}
defer func() {
if tcpc, ok := inStream.(*net.TCPConn); ok {
tcpc.CloseWrite()
} else {
inStream.Close()
}
}()
defer func() {
if tcpc, ok := outStream.(*net.TCPConn); ok {
tcpc.CloseWrite()
} else if closer, ok := outStream.(io.Closer); ok {
closer.Close()
}
}()
var errStream io.Writer
fmt.Fprintf(outStream, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
if !c.Config.Tty && version >= 1.6 {
errStream = utils.NewStdWriter(outStream, utils.Stderr)
outStream = utils.NewStdWriter(outStream, utils.Stdout)
} else {
errStream = outStream
}
if err := srv.ContainerAttach(name, logs, stream, stdin, stdout, stderr, inStream, outStream, errStream); err != nil {
fmt.Fprintf(outStream, "Error: %s\n", err)
}
return nil
}
func wsContainersAttach(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
logs, err := getBoolParam(r.Form.Get("logs"))
if err != nil {
return err
}
stream, err := getBoolParam(r.Form.Get("stream"))
if err != nil {
return err
}
stdin, err := getBoolParam(r.Form.Get("stdin"))
if err != nil {
return err
}
stdout, err := getBoolParam(r.Form.Get("stdout"))
if err != nil {
return err
}
stderr, err := getBoolParam(r.Form.Get("stderr"))
if err != nil {
return err
}
if vars == nil {
return fmt.Errorf("Missing parameter")
}
name := vars["name"]
if _, err := srv.ContainerInspect(name); err != nil {
return err
}
h := websocket.Handler(func(ws *websocket.Conn) {
defer ws.Close()
if err := srv.ContainerAttach(name, logs, stream, stdin, stdout, stderr, ws, ws, ws); err != nil {
utils.Errorf("Error: %s", err)
}
})
h.ServeHTTP(w, r)
return nil
}
func getContainersByName(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if vars == nil {
return fmt.Errorf("Missing parameter")
}
name := vars["name"]
container, err := srv.ContainerInspect(name)
if err != nil {
return err
}
_, err = srv.ImageInspect(name)
if err == nil {
return fmt.Errorf("Conflict between containers and images")
}
container.readHostConfig()
c := APIContainer{container, container.hostConfig}
return writeJSON(w, http.StatusOK, c)
}
func getImagesByName(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if vars == nil {
return fmt.Errorf("Missing parameter")
}
name := vars["name"]
image, err := srv.ImageInspect(name)
if err != nil {
return err
}
_, err = srv.ContainerInspect(name)
if err == nil {
return fmt.Errorf("Conflict between containers and images")
}
return writeJSON(w, http.StatusOK, image)
}
func postBuild(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if version < 1.3 {
return fmt.Errorf("Multipart upload for build is no longer supported. Please upgrade your docker client.")
}
var (
remoteURL = r.FormValue("remote")
repoName = r.FormValue("t")
rawSuppressOutput = r.FormValue("q")
rawNoCache = r.FormValue("nocache")
rawRm = r.FormValue("rm")
authEncoded = r.Header.Get("X-Registry-Auth")
authConfig = &auth.AuthConfig{}
tag string
)
repoName, tag = utils.ParseRepositoryTag(repoName)
if authEncoded != "" {
authJson := base64.NewDecoder(base64.URLEncoding, strings.NewReader(authEncoded))
if err := json.NewDecoder(authJson).Decode(authConfig); err != nil {
// for a pull it is not an error if no auth was given
// to increase compatibility with the existing api it is defaulting to be empty
authConfig = &auth.AuthConfig{}
}
}
var context io.Reader
if remoteURL == "" {
context = r.Body
} else if utils.IsGIT(remoteURL) {
if !strings.HasPrefix(remoteURL, "git://") {
remoteURL = "https://" + remoteURL
}
root, err := ioutil.TempDir("", "docker-build-git")
if err != nil {
return err
}
defer os.RemoveAll(root)
if output, err := exec.Command("git", "clone", remoteURL, root).CombinedOutput(); err != nil {
return fmt.Errorf("Error trying to use git: %s (%s)", err, output)
}
c, err := archive.Tar(root, archive.Uncompressed)
if err != nil {
return err
}
context = c
} else if utils.IsURL(remoteURL) {
f, err := utils.Download(remoteURL)
if err != nil {
return err
}
defer f.Body.Close()
dockerFile, err := ioutil.ReadAll(f.Body)
if err != nil {
return err
}
c, err := MkBuildContext(string(dockerFile), nil)
if err != nil {
return err
}
context = c
}
suppressOutput, err := getBoolParam(rawSuppressOutput)
if err != nil {
return err
}
noCache, err := getBoolParam(rawNoCache)
if err != nil {
return err
}
rm, err := getBoolParam(rawRm)
if err != nil {
return err
}
if version >= 1.8 {
w.Header().Set("Content-Type", "application/json")
}
sf := utils.NewStreamFormatter(version >= 1.8)
b := NewBuildFile(srv,
&StdoutFormater{
Writer: utils.NewWriteFlusher(w),
StreamFormatter: sf,
},
&StderrFormater{
Writer: utils.NewWriteFlusher(w),
StreamFormatter: sf,
},
!suppressOutput, !noCache, rm, utils.NewWriteFlusher(w), sf, authConfig)
id, err := b.Build(context)
if err != nil {
if sf.Used() {
w.Write(sf.FormatError(err))
return nil
}
return fmt.Errorf("Error build: %s", err)
}
if repoName != "" {
srv.runtime.repositories.Set(repoName, tag, id, false)
}
return nil
}
func postContainersCopy(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if vars == nil {
return fmt.Errorf("Missing parameter")
}
name := vars["name"]
copyData := &APICopy{}
contentType := r.Header.Get("Content-Type")
if contentType == "application/json" {
if err := json.NewDecoder(r.Body).Decode(copyData); err != nil {
return err
}
} else {
return fmt.Errorf("Content-Type not supported: %s", contentType)
}
if copyData.Resource == "" {
return fmt.Errorf("Path cannot be empty")
}
if copyData.Resource[0] == '/' {
copyData.Resource = copyData.Resource[1:]
}
if err := srv.ContainerCopy(name, copyData.Resource, w); err != nil {
utils.Errorf("%s", err.Error())
return err
}
return nil
}
func optionsHandler(srv *Server, version float64, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
w.WriteHeader(http.StatusOK)
return nil
}
func writeCorsHeaders(w http.ResponseWriter, r *http.Request) {
w.Header().Add("Access-Control-Allow-Origin", "*")
w.Header().Add("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept")
w.Header().Add("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT, OPTIONS")
}
func makeHttpHandler(srv *Server, logging bool, localMethod string, localRoute string, handlerFunc HttpApiFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
// log the request
utils.Debugf("Calling %s %s", localMethod, localRoute)
if logging {
log.Println(r.Method, r.RequestURI)
}
if strings.Contains(r.Header.Get("User-Agent"), "Docker-Client/") {
userAgent := strings.Split(r.Header.Get("User-Agent"), "/")
if len(userAgent) == 2 && userAgent[1] != VERSION {
utils.Debugf("Warning: client and server don't have the same version (client: %s, server: %s)", userAgent[1], VERSION)
}
}
version, err := strconv.ParseFloat(mux.Vars(r)["version"], 64)
if err != nil {
version = APIVERSION
}
if srv.runtime.config.EnableCors {
writeCorsHeaders(w, r)
}
if version == 0 || version > APIVERSION {
w.WriteHeader(http.StatusNotFound)
return
}
if err := handlerFunc(srv, version, w, r, mux.Vars(r)); err != nil {
utils.Errorf("Error: %s", err)
httpError(w, err)
}
}
}
// Replicated from expvar.go as not public.
func expvarHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
fmt.Fprintf(w, "{\n")
first := true
expvar.Do(func(kv expvar.KeyValue) {
if !first {
fmt.Fprintf(w, ",\n")
}
first = false
fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value)
})
fmt.Fprintf(w, "\n}\n")
}
func AttachProfiler(router *mux.Router) {
router.HandleFunc("/debug/vars", expvarHandler)
router.HandleFunc("/debug/pprof/", pprof.Index)
router.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
router.HandleFunc("/debug/pprof/profile", pprof.Profile)
router.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
router.HandleFunc("/debug/pprof/heap", pprof.Handler("heap").ServeHTTP)
router.HandleFunc("/debug/pprof/goroutine", pprof.Handler("goroutine").ServeHTTP)
router.HandleFunc("/debug/pprof/threadcreate", pprof.Handler("threadcreate").ServeHTTP)
}
func createRouter(srv *Server, logging bool) (*mux.Router, error) {
r := mux.NewRouter()
if os.Getenv("DEBUG") != "" {
AttachProfiler(r)
}
m := map[string]map[string]HttpApiFunc{
"GET": {
"/events": getEvents,
"/info": getInfo,
"/version": getVersion,
"/images/json": getImagesJSON,
"/images/viz": getImagesViz,
"/images/search": getImagesSearch,
"/images/{name:.*}/get": getImagesGet,
"/images/{name:.*}/history": getImagesHistory,
"/images/{name:.*}/json": getImagesByName,
"/containers/ps": getContainersJSON,
"/containers/json": getContainersJSON,
"/containers/{name:.*}/export": getContainersExport,
"/containers/{name:.*}/changes": getContainersChanges,
"/containers/{name:.*}/json": getContainersByName,
"/containers/{name:.*}/top": getContainersTop,
"/containers/{name:.*}/attach/ws": wsContainersAttach,
},
"POST": {
"/auth": postAuth,
"/commit": postCommit,
"/build": postBuild,
"/images/create": postImagesCreate,
"/images/{name:.*}/insert": postImagesInsert,
"/images/load": postImagesLoad,
"/images/{name:.*}/push": postImagesPush,
"/images/{name:.*}/tag": postImagesTag,
"/containers/create": postContainersCreate,
"/containers/{name:.*}/kill": postContainersKill,
"/containers/{name:.*}/restart": postContainersRestart,
"/containers/{name:.*}/start": postContainersStart,
"/containers/{name:.*}/stop": postContainersStop,
"/containers/{name:.*}/wait": postContainersWait,
"/containers/{name:.*}/resize": postContainersResize,
"/containers/{name:.*}/attach": postContainersAttach,
"/containers/{name:.*}/copy": postContainersCopy,
},
"DELETE": {
"/containers/{name:.*}": deleteContainers,
"/images/{name:.*}": deleteImages,
},
"OPTIONS": {
"": optionsHandler,
},
}
for method, routes := range m {
for route, fct := range routes {
utils.Debugf("Registering %s, %s", method, route)
// NOTE: scope issue, make sure the variables are local and won't be changed
localRoute := route
localFct := fct
localMethod := method
// build the handler function
f := makeHttpHandler(srv, logging, localMethod, localRoute, localFct)
// add the new route
if localRoute == "" {
r.Methods(localMethod).HandlerFunc(f)
} else {
r.Path("/v{version:[0-9.]+}" + localRoute).Methods(localMethod).HandlerFunc(f)
r.Path(localRoute).Methods(localMethod).HandlerFunc(f)
}
}
}
return r, nil
}
// ServeRequest processes a single http request to the docker remote api.
// FIXME: refactor this to be part of Server and not require re-creating a new
// router each time. This requires first moving ListenAndServe into Server.
func ServeRequest(srv *Server, apiversion float64, w http.ResponseWriter, req *http.Request) error {
router, err := createRouter(srv, false)
if err != nil {
return err
}
// Insert APIVERSION into the request as a convenience
req.URL.Path = fmt.Sprintf("/v%g%s", apiversion, req.URL.Path)
router.ServeHTTP(w, req)
return nil
}
func ListenAndServe(proto, addr string, srv *Server, logging bool) error {
r, err := createRouter(srv, logging)
if err != nil {
return err
}
l, e := net.Listen(proto, addr)
if e != nil {
return e
}
if proto == "unix" {
if err := os.Chmod(addr, 0660); err != nil {
return err
}
groups, err := ioutil.ReadFile("/etc/group")
if err != nil {
return err
}
re := regexp.MustCompile("(^|\n)docker:.*?:([0-9]+)")
if gidMatch := re.FindStringSubmatch(string(groups)); gidMatch != nil {
gid, err := strconv.Atoi(gidMatch[2])
if err != nil {
return err
}
utils.Debugf("docker group found. gid: %d", gid)
if err := os.Chown(addr, 0, gid); err != nil {
return err
}
}
}
httpSrv := http.Server{Addr: addr, Handler: r}
log.Printf("Listening for HTTP on %s (%s)\n", addr, proto)
// Tell the init daemon we are accepting requests
go systemd.SdNotify("READY=1")
return httpSrv.Serve(l)
}