func unmarshalBodyXmlMix()

in oss/client.go [968:1029]
55 lines of code
15 McCabe index (conditional complexity)

func unmarshalBodyXmlMix(result any, output *OperationOutput) error {
	var err error
	var body []byte
	if output.Body != nil {
		defer output.Body.Close()
		if body, err = io.ReadAll(output.Body); err != nil {
			return err
		}
	}

	if len(body) == 0 {
		return nil
	}

	val := reflect.ValueOf(result)
	switch val.Kind() {
	case reflect.Pointer, reflect.Interface:
		if val.IsNil() {
			return nil
		}
		val = val.Elem()
	}
	if val.Kind() != reflect.Struct || output == nil {
		return nil
	}

	t := val.Type()
	idx := -1
	for k := 0; k < t.NumField(); k++ {
		if tag, ok := t.Field(k).Tag.Lookup("output"); ok {
			tokens := strings.Split(tag, ",")
			if len(tokens) < 2 {
				continue
			}
			// header|query|body,filed_name,[required,time,usermeta...]
			switch tokens[0] {
			case "body":
				idx = k
				break
			}
		}
	}

	if idx >= 0 {
		dst := val.Field(idx)
		if dst.IsNil() {
			dst.Set(reflect.New(dst.Type().Elem()))
		}
		err = xml.Unmarshal(body, dst.Interface())
	} else {
		err = xml.Unmarshal(body, result)
	}

	if err != nil {
		err = &DeserializationError{
			Err:      err,
			Snapshot: body,
		}
	}

	return err
}