if (CharUtil.isUrlChar(c) || c == '^' || c == '{' || c == '}' || c == '|' || c == '\\') {
                    buf.append(c);
                } else {
                    buf.append(URLEncoder.encode(String.valueOf(c), filterPathEncoding));
                }
            }
            return buf.toString();
        } catch (final UnsupportedEncodingException e) {
            return path;
        }
    }