github.com/ncdc/docker@v0.10.1-0.20160129113957-6c6729ef5b74/api/server/router/system/system_routes.go (about)

     1  package system
     2  
     3  import (
     4  	"encoding/json"
     5  	"net/http"
     6  	"time"
     7  
     8  	"github.com/Sirupsen/logrus"
     9  	"github.com/docker/docker/api"
    10  	"github.com/docker/docker/api/server/httputils"
    11  	"github.com/docker/docker/pkg/ioutils"
    12  	"github.com/docker/engine-api/types"
    13  	"github.com/docker/engine-api/types/events"
    14  	"github.com/docker/engine-api/types/filters"
    15  	timetypes "github.com/docker/engine-api/types/time"
    16  	"golang.org/x/net/context"
    17  )
    18  
    19  func optionsHandler(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
    20  	w.WriteHeader(http.StatusOK)
    21  	return nil
    22  }
    23  
    24  func pingHandler(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
    25  	_, err := w.Write([]byte{'O', 'K'})
    26  	return err
    27  }
    28  
    29  func (s *systemRouter) getInfo(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
    30  	info, err := s.backend.SystemInfo()
    31  	if err != nil {
    32  		return err
    33  	}
    34  
    35  	return httputils.WriteJSON(w, http.StatusOK, info)
    36  }
    37  
    38  func (s *systemRouter) getVersion(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
    39  	info := s.backend.SystemVersion()
    40  	info.APIVersion = api.DefaultVersion.String()
    41  
    42  	return httputils.WriteJSON(w, http.StatusOK, info)
    43  }
    44  
    45  func (s *systemRouter) getEvents(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
    46  	if err := httputils.ParseForm(r); err != nil {
    47  		return err
    48  	}
    49  	since, sinceNano, err := timetypes.ParseTimestamps(r.Form.Get("since"), -1)
    50  	if err != nil {
    51  		return err
    52  	}
    53  	until, untilNano, err := timetypes.ParseTimestamps(r.Form.Get("until"), -1)
    54  	if err != nil {
    55  		return err
    56  	}
    57  
    58  	timer := time.NewTimer(0)
    59  	timer.Stop()
    60  	if until > 0 || untilNano > 0 {
    61  		dur := time.Unix(until, untilNano).Sub(time.Now())
    62  		timer = time.NewTimer(dur)
    63  	}
    64  
    65  	ef, err := filters.FromParam(r.Form.Get("filters"))
    66  	if err != nil {
    67  		return err
    68  	}
    69  
    70  	w.Header().Set("Content-Type", "application/json")
    71  
    72  	// This is to ensure that the HTTP status code is sent immediately,
    73  	// so that it will not block the receiver.
    74  	w.WriteHeader(http.StatusOK)
    75  	if flusher, ok := w.(http.Flusher); ok {
    76  		flusher.Flush()
    77  	}
    78  
    79  	output := ioutils.NewWriteFlusher(w)
    80  	defer output.Close()
    81  
    82  	enc := json.NewEncoder(output)
    83  
    84  	buffered, l := s.backend.SubscribeToEvents(since, sinceNano, ef)
    85  	defer s.backend.UnsubscribeFromEvents(l)
    86  
    87  	for _, ev := range buffered {
    88  		if err := enc.Encode(ev); err != nil {
    89  			return err
    90  		}
    91  	}
    92  
    93  	var closeNotify <-chan bool
    94  	if closeNotifier, ok := w.(http.CloseNotifier); ok {
    95  		closeNotify = closeNotifier.CloseNotify()
    96  	}
    97  
    98  	for {
    99  		select {
   100  		case ev := <-l:
   101  			jev, ok := ev.(events.Message)
   102  			if !ok {
   103  				logrus.Warnf("unexpected event message: %q", ev)
   104  				continue
   105  			}
   106  			if err := enc.Encode(jev); err != nil {
   107  				return err
   108  			}
   109  		case <-timer.C:
   110  			return nil
   111  		case <-closeNotify:
   112  			logrus.Debug("Client disconnected, stop sending events")
   113  			return nil
   114  		}
   115  	}
   116  }
   117  
   118  func (s *systemRouter) postAuth(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
   119  	var config *types.AuthConfig
   120  	err := json.NewDecoder(r.Body).Decode(&config)
   121  	r.Body.Close()
   122  	if err != nil {
   123  		return err
   124  	}
   125  	status, err := s.backend.AuthenticateToRegistry(config)
   126  	if err != nil {
   127  		return err
   128  	}
   129  	return httputils.WriteJSON(w, http.StatusOK, &types.AuthResponse{
   130  		Status: status,
   131  	})
   132  }