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system_routes.go
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/
system_routes.go
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package system
import (
"encoding/json"
"fmt"
"net/http"
"time"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/events"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/registry"
timetypes "github.com/docker/docker/api/types/time"
"github.com/docker/docker/api/types/versions"
"github.com/docker/docker/pkg/ioutils"
pkgerrors "github.com/pkg/errors"
"github.com/sirupsen/logrus"
"golang.org/x/net/context"
)
func optionsHandler(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
w.WriteHeader(http.StatusOK)
return nil
}
func pingHandler(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
_, err := w.Write([]byte{'O', 'K'})
return err
}
func (s *systemRouter) getInfo(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
info, err := s.backend.SystemInfo()
if err != nil {
return err
}
if s.cluster != nil {
info.Swarm = s.cluster.Info()
}
if versions.LessThan(httputils.VersionFromContext(ctx), "1.25") {
// TODO: handle this conversion in engine-api
type oldInfo struct {
*types.Info
ExecutionDriver string
}
old := &oldInfo{
Info: info,
ExecutionDriver: "<not supported>",
}
nameOnlySecurityOptions := []string{}
kvSecOpts, err := types.DecodeSecurityOptions(old.SecurityOptions)
if err != nil {
return err
}
for _, s := range kvSecOpts {
nameOnlySecurityOptions = append(nameOnlySecurityOptions, s.Name)
}
old.SecurityOptions = nameOnlySecurityOptions
return httputils.WriteJSON(w, http.StatusOK, old)
}
return httputils.WriteJSON(w, http.StatusOK, info)
}
func (s *systemRouter) getVersion(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
info := s.backend.SystemVersion()
return httputils.WriteJSON(w, http.StatusOK, info)
}
func (s *systemRouter) getDiskUsage(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
du, err := s.backend.SystemDiskUsage(ctx)
if err != nil {
return err
}
builderSize, err := s.builder.DiskUsage()
if err != nil {
return pkgerrors.Wrap(err, "error getting build cache usage")
}
du.BuilderSize = builderSize
return httputils.WriteJSON(w, http.StatusOK, du)
}
type invalidRequestError struct {
Err error
}
func (e invalidRequestError) Error() string {
return e.Err.Error()
}
func (e invalidRequestError) InvalidParameter() {}
func (s *systemRouter) getEvents(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
since, err := eventTime(r.Form.Get("since"))
if err != nil {
return err
}
until, err := eventTime(r.Form.Get("until"))
if err != nil {
return err
}
var (
timeout <-chan time.Time
onlyPastEvents bool
)
if !until.IsZero() {
if until.Before(since) {
return invalidRequestError{fmt.Errorf("`since` time (%s) cannot be after `until` time (%s)", r.Form.Get("since"), r.Form.Get("until"))}
}
now := time.Now()
onlyPastEvents = until.Before(now)
if !onlyPastEvents {
dur := until.Sub(now)
timeout = time.After(dur)
}
}
ef, err := filters.FromJSON(r.Form.Get("filters"))
if err != nil {
return err
}
w.Header().Set("Content-Type", "application/json")
output := ioutils.NewWriteFlusher(w)
defer output.Close()
output.Flush()
enc := json.NewEncoder(output)
buffered, l := s.backend.SubscribeToEvents(since, until, ef)
defer s.backend.UnsubscribeFromEvents(l)
for _, ev := range buffered {
if err := enc.Encode(ev); err != nil {
return err
}
}
if onlyPastEvents {
return nil
}
for {
select {
case ev := <-l:
jev, ok := ev.(events.Message)
if !ok {
logrus.Warnf("unexpected event message: %q", ev)
continue
}
if err := enc.Encode(jev); err != nil {
return err
}
case <-timeout:
return nil
case <-ctx.Done():
logrus.Debug("Client context cancelled, stop sending events")
return nil
}
}
}
func (s *systemRouter) postAuth(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
var config *types.AuthConfig
err := json.NewDecoder(r.Body).Decode(&config)
r.Body.Close()
if err != nil {
return err
}
status, token, err := s.backend.AuthenticateToRegistry(ctx, config)
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, ®istry.AuthenticateOKBody{
Status: status,
IdentityToken: token,
})
}
func eventTime(formTime string) (time.Time, error) {
t, tNano, err := timetypes.ParseTimestamps(formTime, -1)
if err != nil {
return time.Time{}, err
}
if t == -1 {
return time.Time{}, nil
}
return time.Unix(t, tNano), nil
}