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info.go
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/
info.go
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package local
import (
"encoding/json"
"net/http"
"runtime"
"time"
"github.com/Sirupsen/logrus"
"github.com/docker/docker/api"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/api/types"
"github.com/docker/docker/autogen/dockerversion"
"github.com/docker/docker/pkg/ioutils"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/parsers/filters"
"github.com/docker/docker/pkg/parsers/kernel"
"github.com/docker/docker/utils"
"golang.org/x/net/context"
)
func (s *router) getVersion(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
v := &types.Version{
Version: dockerversion.VERSION,
APIVersion: api.Version,
GitCommit: dockerversion.GITCOMMIT,
GoVersion: runtime.Version(),
Os: runtime.GOOS,
Arch: runtime.GOARCH,
BuildTime: dockerversion.BUILDTIME,
}
version := httputils.VersionFromContext(ctx)
if version.GreaterThanOrEqualTo("1.19") {
v.Experimental = utils.ExperimentalBuild()
}
if kernelVersion, err := kernel.GetKernelVersion(); err == nil {
v.KernelVersion = kernelVersion.String()
}
return httputils.WriteJSON(w, http.StatusOK, v)
}
func (s *router) getInfo(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
info, err := s.daemon.SystemInfo()
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusOK, info)
}
func buildOutputEncoder(w http.ResponseWriter) *json.Encoder {
w.Header().Set("Content-Type", "application/json")
outStream := ioutils.NewWriteFlusher(w)
// Write an empty chunk of data.
// This is to ensure that the HTTP status code is sent immediately,
// so that it will not block the receiver.
outStream.Write(nil)
return json.NewEncoder(outStream)
}
func (s *router) 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 := httputils.Int64ValueOrDefault(r, "since", -1)
if err != nil {
return err
}
until, err := httputils.Int64ValueOrDefault(r, "until", -1)
if err != nil {
return err
}
timer := time.NewTimer(0)
timer.Stop()
if until > 0 {
dur := time.Unix(until, 0).Sub(time.Now())
timer = time.NewTimer(dur)
}
ef, err := filters.FromParam(r.Form.Get("filters"))
if err != nil {
return err
}
enc := buildOutputEncoder(w)
d := s.daemon
es := d.EventsService
current, l := es.Subscribe()
defer es.Evict(l)
eventFilter := d.GetEventFilter(ef)
handleEvent := func(ev *jsonmessage.JSONMessage) error {
if eventFilter.Include(ev) {
if err := enc.Encode(ev); err != nil {
return err
}
}
return nil
}
if since == -1 {
current = nil
}
for _, ev := range current {
if ev.Time < since {
continue
}
if err := handleEvent(ev); err != nil {
return err
}
}
var closeNotify <-chan bool
if closeNotifier, ok := w.(http.CloseNotifier); ok {
closeNotify = closeNotifier.CloseNotify()
}
for {
select {
case ev := <-l:
jev, ok := ev.(*jsonmessage.JSONMessage)
if !ok {
continue
}
if err := handleEvent(jev); err != nil {
return err
}
case <-timer.C:
return nil
case <-closeNotify:
logrus.Debug("Client disconnected, stop sending events")
return nil
}
}
}