github.com/jiasir/docker@v1.3.3-0.20170609024000-252e610103e7/daemon/events/filter.go (about)

     1  package events
     2  
     3  import (
     4  	"github.com/docker/distribution/reference"
     5  	"github.com/docker/docker/api/types/events"
     6  	"github.com/docker/docker/api/types/filters"
     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.matchEvent(ev) &&
    22  		ef.filter.ExactMatch("type", ev.Type) &&
    23  		ef.matchScope(ev.Scope) &&
    24  		ef.matchDaemon(ev) &&
    25  		ef.matchContainer(ev) &&
    26  		ef.matchPlugin(ev) &&
    27  		ef.matchVolume(ev) &&
    28  		ef.matchNetwork(ev) &&
    29  		ef.matchImage(ev) &&
    30  		ef.matchLabels(ev.Actor.Attributes)
    31  }
    32  
    33  func (ef *Filter) matchEvent(ev events.Message) bool {
    34  	// #25798 if an event filter contains either health_status, exec_create or exec_start without a colon
    35  	// Let's to a FuzzyMatch instead of an ExactMatch.
    36  	if ef.filterContains("event", map[string]struct{}{"health_status": {}, "exec_create": {}, "exec_start": {}}) {
    37  		return ef.filter.FuzzyMatch("event", ev.Action)
    38  	}
    39  	return ef.filter.ExactMatch("event", ev.Action)
    40  }
    41  
    42  func (ef *Filter) filterContains(field string, values map[string]struct{}) bool {
    43  	for _, v := range ef.filter.Get(field) {
    44  		if _, ok := values[v]; ok {
    45  			return true
    46  		}
    47  	}
    48  	return false
    49  }
    50  
    51  func (ef *Filter) matchScope(scope string) bool {
    52  	if !ef.filter.Include("scope") {
    53  		return true
    54  	}
    55  	return ef.filter.ExactMatch("scope", scope)
    56  }
    57  
    58  func (ef *Filter) matchLabels(attributes map[string]string) bool {
    59  	if !ef.filter.Include("label") {
    60  		return true
    61  	}
    62  	return ef.filter.MatchKVList("label", attributes)
    63  }
    64  
    65  func (ef *Filter) matchDaemon(ev events.Message) bool {
    66  	return ef.fuzzyMatchName(ev, events.DaemonEventType)
    67  }
    68  
    69  func (ef *Filter) matchContainer(ev events.Message) bool {
    70  	return ef.fuzzyMatchName(ev, events.ContainerEventType)
    71  }
    72  
    73  func (ef *Filter) matchPlugin(ev events.Message) bool {
    74  	return ef.fuzzyMatchName(ev, events.PluginEventType)
    75  }
    76  
    77  func (ef *Filter) matchVolume(ev events.Message) bool {
    78  	return ef.fuzzyMatchName(ev, events.VolumeEventType)
    79  }
    80  
    81  func (ef *Filter) matchNetwork(ev events.Message) bool {
    82  	return ef.fuzzyMatchName(ev, events.NetworkEventType)
    83  }
    84  
    85  func (ef *Filter) matchService(ev events.Message) bool {
    86  	return ef.fuzzyMatchName(ev, events.ServiceEventType)
    87  }
    88  
    89  func (ef *Filter) matchNode(ev events.Message) bool {
    90  	return ef.fuzzyMatchName(ev, events.NodeEventType)
    91  }
    92  
    93  func (ef *Filter) matchSecret(ev events.Message) bool {
    94  	return ef.fuzzyMatchName(ev, events.SecretEventType)
    95  }
    96  
    97  func (ef *Filter) fuzzyMatchName(ev events.Message, eventType string) bool {
    98  	return ef.filter.FuzzyMatch(eventType, ev.Actor.ID) ||
    99  		ef.filter.FuzzyMatch(eventType, ev.Actor.Attributes["name"])
   100  }
   101  
   102  // matchImage matches against both event.Actor.ID (for image events)
   103  // and event.Actor.Attributes["image"] (for container events), so that any container that was created
   104  // from an image will be included in the image events. Also compare both
   105  // against the stripped repo name without any tags.
   106  func (ef *Filter) matchImage(ev events.Message) bool {
   107  	id := ev.Actor.ID
   108  	nameAttr := "image"
   109  	var imageName string
   110  
   111  	if ev.Type == events.ImageEventType {
   112  		nameAttr = "name"
   113  	}
   114  
   115  	if n, ok := ev.Actor.Attributes[nameAttr]; ok {
   116  		imageName = n
   117  	}
   118  	return ef.filter.ExactMatch("image", id) ||
   119  		ef.filter.ExactMatch("image", imageName) ||
   120  		ef.filter.ExactMatch("image", stripTag(id)) ||
   121  		ef.filter.ExactMatch("image", stripTag(imageName))
   122  }
   123  
   124  func stripTag(image string) string {
   125  	ref, err := reference.ParseNormalizedNamed(image)
   126  	if err != nil {
   127  		return image
   128  	}
   129  	return reference.FamiliarName(ref)
   130  }