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 }