traefik/provider/label/parser.go

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package label
import (
"github.com/containous/traefik/config"
"github.com/containous/traefik/provider/label/internal"
)
// DecodeConfiguration Converts the labels to a configuration.
func DecodeConfiguration(labels map[string]string) (*config.Configuration, error) {
conf := &config.Configuration{
HTTP: &config.HTTPConfiguration{},
TCP: &config.TCPConfiguration{},
}
err := Decode(labels, conf, "traefik.http", "traefik.tcp")
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if err != nil {
return nil, err
}
return conf, nil
}
// EncodeConfiguration Converts a configuration to labels.
func EncodeConfiguration(conf *config.Configuration) (map[string]string, error) {
return Encode(conf)
}
// Decode Converts the labels to an element.
// labels -> [ node -> node + metadata (type) ] -> element (node)
func Decode(labels map[string]string, element interface{}, filters ...string) error {
node, err := internal.DecodeToNode(labels, filters...)
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if err != nil {
return err
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}
err = internal.AddMetadata(element, node)
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if err != nil {
return err
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}
err = internal.Fill(element, node)
if err != nil {
return err
}
return nil
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}
// Encode Converts an element to labels.
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// element -> node (value) -> label (node)
func Encode(element interface{}) (map[string]string, error) {
node, err := internal.EncodeToNode(element)
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if err != nil {
return nil, err
}
return internal.EncodeNode(node), nil
}