if (StringUtil.isNotBlank(body)) {
            buf.append(body);
        }
        buf.append('}');
        if (isJsonp) {
            buf.append(')');
        }
        write(buf.toString(), mimeType, Constants.UTF_8);
    }

    protected String escapeCallbackName(final String callbackName) {
        return "/**/" + callbackName.replaceAll("[^0-9a-zA-Z_\\$\\.]", StringUtil.EMPTY);
    }

     *
     * @param writer
     *            ライター
     * @return ラップされたライター
     */
    protected static Writer wrap(final Writer writer) {
        if (writer instanceof BufferedWriter) {
            return writer;
        }
        if (writer instanceof StringWriter) {
            return writer;
        }
        return new BufferedWriter(writer, DEFAULT_BUF_SIZE);
    }