github.com/vieux/docker@v0.6.3-0.20161004191708-e097c2a938c7/daemon/events/filter.go (about)

     1  package events
     2  
     3  import (
     4  	"github.com/docker/docker/api/types/events"
     5  	"github.com/docker/docker/api/types/filters"
     6  	"github.com/docker/docker/reference"
     7  )
     8  
     9  // Filter can filter out docker events from a stream
    10  type Filter struct {
    11  	filter filters.Args
    12  }
    13  
    14  // NewFilter creates a new Filter
    15  func NewFilter(filter filters.Args) *Filter {
    16  	return &Filter{filter: filter}
    17  }
    18  
    19  // Include returns true when the event ev is included by the filters
    20  func (ef *Filter) Include(ev events.Message) bool {
    21  	return ef.filter.ExactMatch("event", ev.Action) &&
    22  		ef.filter.ExactMatch("type", ev.Type) &&
    23  		ef.matchDaemon(ev) &&
    24  		ef.matchContainer(ev) &&
    25  		ef.matchPlugin(ev) &&
    26  		ef.matchVolume(ev) &&
    27  		ef.matchNetwork(ev) &&
    28  		ef.matchImage(ev) &&
    29  		ef.matchLabels(ev.Actor.Attributes)
    30  }
    31  
    32  func (ef *Filter) matchLabels(attributes map[string]string) bool {
    33  	if !ef.filter.Include("label") {
    34  		return true
    35  	}
    36  	return ef.filter.MatchKVList("label", attributes)
    37  }
    38  
    39  func (ef *Filter) matchDaemon(ev events.Message) bool {
    40  	return ef.fuzzyMatchName(ev, events.DaemonEventType)
    41  }
    42  
    43  func (ef *Filter) matchContainer(ev events.Message) bool {
    44  	return ef.fuzzyMatchName(ev, events.ContainerEventType)
    45  }
    46  
    47  func (ef *Filter) matchPlugin(ev events.Message) bool {
    48  	return ef.fuzzyMatchName(ev, events.PluginEventType)
    49  }
    50  
    51  func (ef *Filter) matchVolume(ev events.Message) bool {
    52  	return ef.fuzzyMatchName(ev, events.VolumeEventType)
    53  }
    54  
    55  func (ef *Filter) matchNetwork(ev events.Message) bool {
    56  	return ef.fuzzyMatchName(ev, events.NetworkEventType)
    57  }
    58  
    59  func (ef *Filter) fuzzyMatchName(ev events.Message, eventType string) bool {
    60  	return ef.filter.FuzzyMatch(eventType, ev.Actor.ID) ||
    61  		ef.filter.FuzzyMatch(eventType, ev.Actor.Attributes["name"])
    62  }
    63  
    64  // matchImage matches against both event.Actor.ID (for image events)
    65  // and event.Actor.Attributes["image"] (for container events), so that any container that was created
    66  // from an image will be included in the image events. Also compare both
    67  // against the stripped repo name without any tags.
    68  func (ef *Filter) matchImage(ev events.Message) bool {
    69  	id := ev.Actor.ID
    70  	nameAttr := "image"
    71  	var imageName string
    72  
    73  	if ev.Type == events.ImageEventType {
    74  		nameAttr = "name"
    75  	}
    76  
    77  	if n, ok := ev.Actor.Attributes[nameAttr]; ok {
    78  		imageName = n
    79  	}
    80  	return ef.filter.ExactMatch("image", id) ||
    81  		ef.filter.ExactMatch("image", imageName) ||
    82  		ef.filter.ExactMatch("image", stripTag(id)) ||
    83  		ef.filter.ExactMatch("image", stripTag(imageName))
    84  }
    85  
    86  func stripTag(image string) string {
    87  	ref, err := reference.ParseNamed(image)
    88  	if err != nil {
    89  		return image
    90  	}
    91  	return ref.Name()
    92  }