How to get full client info using servlet request, including client IP, browser, os, use-agent and referer

ClientInfo.java

@RequiredArgsConstructor
public class HttpClientUtil {

    private final HttpServletRequest request;

    private final String[] HEADERS_TO_TRY_TO_GET_IP = {
            "X-Forwarded-For",
            "Proxy-Client-IP",
            "WL-Proxy-Client-IP",
            "HTTP_X_FORWARDED_FOR",
            "HTTP_X_FORWARDED",
            "HTTP_X_CLUSTER_CLIENT_IP",
            "HTTP_CLIENT_IP",
            "HTTP_FORWARDED_FOR",
            "HTTP_FORWARDED",
            "HTTP_VIA",
            "REMOTE_ADDR"};

    public String getClientIpAddress() {
        for (String header : HEADERS_TO_TRY_TO_GET_IP) {
            String ip = request.getHeader(header);

            if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) {
                return ip;
            }
        }

        return request.getRemoteAddr();
    }

    public String getReferer() {
        return request.getHeader("referer");
    }

    public String getUserAgent() {
        return request.getHeader("User-Agent");
    }

    public String getFullUrl() {
        final StringBuffer requestUrl = request.getRequestURL();
        final String queryString = request.getQueryString();

        return queryString == null ? request.toString() : requestUrl.append('?')
                .append(queryString)
                .toString();
    }

    public String getClientOs() {
        final String[] OS = {"windows", "mac", "x11", "android", "iphone"};
        final String userAgent = getUserAgent();
        final String lowerCaseUA = userAgent.toLowerCase();

        for (String os : OS) {
            if (lowerCaseUA.contains(os)) {
                if(os.equals("x11")) return "Unix";
                if(os.equals("mac") && lowerCaseUA.contains("iphone")) return "IOS";
                return os.substring(0, 1).toUpperCase().concat(os.substring(1));
            }
        }

        return "Unknown";
    }

    public String getClientBrowser() {
        final String userAgent = getUserAgent();
        final String lowerCaseUA = userAgent.toLowerCase();
        String browser = "";

        if (lowerCaseUA.contains("mise")) {
            String substring = userAgent.substring(userAgent.indexOf("MSIE")).split(";")[0];
            browser = substring.split(" ")[0].replace("MSIE", "IE") + "-" + substring.split(" ")[1];
        } else if (lowerCaseUA.contains("safari") && lowerCaseUA.contains("version") && !lowerCaseUA.contains("naver")) {
            browser = (userAgent.substring(userAgent.indexOf("Safari")).split(" ")[0])
                    .split("/")[0] + "-" + (userAgent.substring(userAgent.indexOf("Version"))
                    .split(" ")[0])
                    .split("/")[1];
        } else if (lowerCaseUA.contains("opr") || lowerCaseUA.contains("opera")) {
            if (lowerCaseUA.contains("opera")) {
                browser = (userAgent.substring(userAgent.indexOf("Opera")).split(" ")[0])
                        .split("/")[0] + "-" + (userAgent.substring(userAgent.indexOf("Version"))
                        .split(" ")[0])
                        .split("/")[1];
            } else if (lowerCaseUA.contains("opr")) {
                browser = ((userAgent.substring(userAgent.indexOf("OPR")).split(" ")[0])
                        .replace("/", "-"))
                        .replace("OPR", "opera");
            }
        } else if (lowerCaseUA.contains("chrome")) {
            browser = (userAgent.substring(userAgent.indexOf("Chrome")).split(" ")[0]).replace("/", "-");
        } else if (
                (lowerCaseUA.contains("mozilla/7.0")) ||
                        (lowerCaseUA.contains("netscape6")) ||
                        (lowerCaseUA.contains("mozilla/4.7")) ||
                        (lowerCaseUA.contains("mozilla/4.78")) ||
                        (lowerCaseUA.contains("mozilla/4.08")) ||
                        (lowerCaseUA.contains("mozilla/3"))
        ) {
            browser = "Netscape-?";
        } else if (lowerCaseUA.contains("firefox") || lowerCaseUA.contains("fx")) {
            if(userAgent.contains("Fx")) {
                browser = (userAgent.substring(userAgent.indexOf("Fx")).split(" ")[0]).replace("/", "-");
            } else {
                browser = (userAgent.substring(userAgent.indexOf("Firefox")).split(" ")[0]).replace("/", "-");
            }
        } else if (lowerCaseUA.contains("rv")) {
            browser = "IE";
        } else if (lowerCaseUA.contains("crios")) {
            browser = (userAgent.substring(userAgent.indexOf("Cr")).split(" ")[0]).replace("/", "-");
        } else if (lowerCaseUA.contains("naver")) {
            browser = "Naver";
        } else if (lowerCaseUA.contains("kakaotalk")) {
            browser = "KakaoTalk";
        } else if (lowerCaseUA.contains("whale")) {
            browser = (userAgent.substring(userAgent.indexOf("Whale")).split(" ")[0]).replace("/", "-");
        } else {
            browser = "Unknown";
        }

        return browser;
    }

    public String getDevice() {
        final String[] MOBILE = {
                "android; mobile;",
                "mobile safari",
                "opera mobi",
                "iemobile",
                "iphone; cpu iphone",

        };

        final String userAgent = getUserAgent();
        final String lowerCaseUA = userAgent.toLowerCase();

        for(String mobile: MOBILE) {
            if(lowerCaseUA.contains(mobile)) return "Mobile";
        }

        return "Desktop";
    }
}