65 lines
1.8 KiB
Go
65 lines
1.8 KiB
Go
![]() |
package events
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import (
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"github.com/docker/docker/pkg/jsonmessage"
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"github.com/docker/docker/pkg/parsers"
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"github.com/docker/docker/pkg/parsers/filters"
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)
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// Filter can filter out docker events from a stream
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type Filter struct {
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filter filters.Args
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getLabels func(id string) map[string]string
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}
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// NewFilter creates a new Filter
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func NewFilter(filter filters.Args, getLabels func(id string) map[string]string) *Filter {
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return &Filter{filter: filter, getLabels: getLabels}
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}
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// Include returns true when the event ev is included by the filters
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func (ef *Filter) Include(ev *jsonmessage.JSONMessage) bool {
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return isFieldIncluded(ev.Status, ef.filter["event"]) &&
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isFieldIncluded(ev.ID, ef.filter["container"]) &&
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ef.isImageIncluded(ev.ID, ev.From) &&
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ef.isLabelFieldIncluded(ev.ID)
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}
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func (ef *Filter) isLabelFieldIncluded(id string) bool {
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if _, ok := ef.filter["label"]; !ok {
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return true
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}
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return ef.filter.MatchKVList("label", ef.getLabels(id))
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}
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// The image filter will be matched against both event.ID (for image events)
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// and event.From (for container events), so that any container that was created
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// from an image will be included in the image events. Also compare both
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// against the stripped repo name without any tags.
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func (ef *Filter) isImageIncluded(eventID string, eventFrom string) bool {
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stripTag := func(image string) string {
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repo, _ := parsers.ParseRepositoryTag(image)
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return repo
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}
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return isFieldIncluded(eventID, ef.filter["image"]) ||
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isFieldIncluded(eventFrom, ef.filter["image"]) ||
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isFieldIncluded(stripTag(eventID), ef.filter["image"]) ||
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isFieldIncluded(stripTag(eventFrom), ef.filter["image"])
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}
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func isFieldIncluded(field string, filter []string) bool {
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if len(field) == 0 {
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return true
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}
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if len(filter) == 0 {
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return true
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}
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for _, v := range filter {
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if v == field {
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return true
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}
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}
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return false
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}
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