final FTPClient client, final FtpInfo ftpInfo, final FTPFile file) {
        if (file == null) {
            responseData.setHttpStatusCode(Constants.NOT_FOUND_STATUS_CODE);
            responseData.setCharSet(charset);
            responseData.setContentLength(0);
            ftpClientQueue.offer(client);
            return;
        }

        if (file.isSymbolicLink()) {

                if (defaultEncoding == null) {
                    responseData.setCharSet(Constants.UTF_8);
                } else if (responseData.getCharSet() == null) {
                    responseData.setCharSet(defaultEncoding);
                }
            } else {
                responseData.setCharSet(encoding.trim());
            }

            if (!isSupportedCharset(responseData.getCharSet())) {

        responseBodyFile = responseBody;
        isTemporaryFile = isTemporary;
    }

    public String getCharSet() {
        return charSet;
    }

    public void setCharSet(final String charSet) {
        this.charSet = charSet;
    }

    public long getContentLength() {
        return contentLength;
    }

    public void setContentLength(final long contentLength) {

            if (i % 1000 == 0) {
                logger.info("count:" + i + ", " + MemoryUtil.getMemoryUsageLog());
            }
            ResponseData responseData = new ResponseData();
            responseData.setCharSet("UTF-8");
            responseData.setContentLength(data.length());
            responseData.setExecutionTime(1000L);
            responseData.setHttpStatusCode(200);
            responseData.setLastModified(new Date());