85 lines
1.7 KiB
Go
85 lines
1.7 KiB
Go
package file
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"path/filepath"
|
|
"reflect"
|
|
"strings"
|
|
|
|
"github.com/BurntSushi/toml"
|
|
"github.com/containous/traefik/v2/pkg/config/parser"
|
|
"gopkg.in/yaml.v2"
|
|
)
|
|
|
|
// decodeFileToNode decodes the configuration in filePath in a tree of untyped nodes.
|
|
// If filters is not empty, it skips any configuration element whose name is
|
|
// not among filters.
|
|
func decodeFileToNode(filePath string, filters ...string) (*parser.Node, error) {
|
|
content, err := ioutil.ReadFile(filePath)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
data := make(map[string]interface{})
|
|
|
|
switch strings.ToLower(filepath.Ext(filePath)) {
|
|
case ".toml":
|
|
err = toml.Unmarshal(content, &data)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
case ".yml", ".yaml":
|
|
err = yaml.Unmarshal(content, data)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
default:
|
|
return nil, fmt.Errorf("unsupported file extension: %s", filePath)
|
|
}
|
|
|
|
return decodeRawToNode(data, parser.DefaultRootName, filters...)
|
|
}
|
|
|
|
func getRootFieldNames(element interface{}) []string {
|
|
if element == nil {
|
|
return nil
|
|
}
|
|
|
|
rootType := reflect.TypeOf(element)
|
|
|
|
return getFieldNames(rootType)
|
|
}
|
|
|
|
func getFieldNames(rootType reflect.Type) []string {
|
|
var names []string
|
|
|
|
if rootType.Kind() == reflect.Ptr {
|
|
rootType = rootType.Elem()
|
|
}
|
|
|
|
if rootType.Kind() != reflect.Struct {
|
|
return nil
|
|
}
|
|
|
|
for i := 0; i < rootType.NumField(); i++ {
|
|
field := rootType.Field(i)
|
|
|
|
if !parser.IsExported(field) {
|
|
continue
|
|
}
|
|
|
|
if field.Anonymous &&
|
|
(field.Type.Kind() == reflect.Ptr && field.Type.Elem().Kind() == reflect.Struct || field.Type.Kind() == reflect.Struct) {
|
|
names = append(names, getFieldNames(field.Type)...)
|
|
continue
|
|
}
|
|
|
|
names = append(names, field.Name)
|
|
}
|
|
|
|
return names
|
|
}
|