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package egovframework.com.cmm.util;
import java.util.Map;
import java.util.UUID;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
/**
* Utility class to support to double submit preventer
* @author Vincent Han
* @since 2014.08.07
* @version 1.0
* @see
*
* <pre>
* << 개정이력(Modification Information) >>
*
* 수정일 수정자 수정내용
* ------- -------- ---------------------------
* 2014.08.07 표준프레임워크센터 최초 생성
*
* </pre>
*/
public class EgovDoubleSubmitHelper {
private static final Logger LOGGER = LoggerFactory.getLogger(EgovDoubleSubmitHelper.class);
public final static String SESSION_TOKEN_KEY = "egovframework.double.submit.preventer.session.key";
public final static String PARAMETER_NAME = "egovframework.double.submit.preventer.parameter.name";
public final static String DEFAULT_TOKEN_KEY = "DEFAULT";
public static String getNewUUID() {
return UUID.randomUUID().toString().toUpperCase();
}
public static boolean checkAndSaveToken() {
return checkAndSaveToken(DEFAULT_TOKEN_KEY);
}
public static boolean checkAndSaveToken(String tokenKey) {
HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
HttpSession session = request.getSession();
// check session...
if (session.getAttribute(EgovDoubleSubmitHelper.SESSION_TOKEN_KEY) == null) {
throw new RuntimeException("Double Submit Preventer TagLig isn't set. Check JSP.");
}
String parameter = request.getParameter(EgovDoubleSubmitHelper.PARAMETER_NAME);
// check parameter
if (parameter == null) {
throw new RuntimeException("Double Submit Preventer parameter isn't set. Check JSP.");
}
@SuppressWarnings("unchecked")
Map<String, String> map = (Map<String, String>) session.getAttribute(EgovDoubleSubmitHelper.SESSION_TOKEN_KEY);
if (parameter.equals(map.get(tokenKey))) {
LOGGER.debug("[Double Submit] session token ({}) equals to parameter token.", tokenKey);
map.put(tokenKey, getNewUUID());
return true;
}
LOGGER.debug("[Double Submit] session token ({}) isn't equal to parameter token.", tokenKey);
return false;
}
}