@Override
    public TubeMQResult requestMaster(String url) {
        log.info("start to request {}", url);
        long startTime = System.currentTimeMillis();

        if (!isValidURL(url)) {
            log.error("Invalid URL: {}", url);
            logRequestDetails(url, startTime, "Invalid URL");
            return TubeMQResult.errorResult("Invalid URL.");
        }

        String hostname = getHostnameFromURL(url);

        if (!isValidHostname(hostname)) {
            log.error("Invalid hostname: {}", hostname);
            logRequestDetails(url, startTime, "Invalid hostname");
            return TubeMQResult.errorResult("Invalid hostname.");
        }

        HttpGet httpGet = new HttpGet(url);
        return executeHttpRequest(httpGet, url, startTime);
    }
Request the master using the given URL.

@param url The URL to request.
@return TubeMQResult representing the result of the request.
inlong-tubemq/tubemq-manager/src/main/java/org/apache/inlong/tubemq/manager/service/MasterServiceImpl.java