Spring Web: Get current request and generate base URL

Just a simple way to generate application's base URL according to the environment context using current request:

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protected static String getBaseEnvLinkURL() {      String baseEnvLinkURL=null;    HttpServletRequest currentRequest =       ((ServletRequestAttributes)RequestContextHolder.        currentRequestAttributes()).getRequest();    // lazy about determining protocol but can be done too    baseEnvLinkURL = "http://" + currentRequest.getLocalName();    if(currentRequest.getLocalPort() != 80) {       baseEnvLinkURL += ":" + currentRequest.getLocalPort();    }    if(!StringUtils.isEmpty(currentRequest.getContextPath())) {       baseEnvLinkURL += currentRequest.getContextPath();    }               return baseEnvLinkURL; }