org.springframework.security.web.session.ConcurrentSessionFilter Maven / Gradle / Ivy
/*
* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.security.web.session;
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.session.SessionInformation;
import org.springframework.security.core.session.SessionRegistry;
import org.springframework.security.web.RedirectStrategy;
import org.springframework.security.web.authentication.logout.CompositeLogoutHandler;
import org.springframework.security.web.authentication.logout.LogoutHandler;
import org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler;
import org.springframework.security.web.util.UrlUtils;
import org.springframework.util.Assert;
import org.springframework.web.filter.GenericFilterBean;
/**
* Filter required by concurrent session handling package.
*
* This filter performs two functions. First, it calls
* {@link org.springframework.security.core.session.SessionRegistry#refreshLastRequest(String)}
* for each request so that registered sessions always have a correct "last update"
* date/time. Second, it retrieves a
* {@link org.springframework.security.core.session.SessionInformation} from the
* SessionRegistry for each request and checks if the session has been marked
* as expired. If it has been marked as expired, the configured logout handlers will be
* called (as happens with
* {@link org.springframework.security.web.authentication.logout.LogoutFilter}), typically
* to invalidate the session. To handle the expired session a call to the {@link SessionInformationExpiredStrategy} is made.
* The session invalidation will cause an
* {@link org.springframework.security.web.session.HttpSessionDestroyedEvent} to be
* published via the
* {@link org.springframework.security.web.session.HttpSessionEventPublisher} registered
* in web.xml.
*
*
* @author Ben Alex
* @author Eddú Meléndez
* @author Marten Deinum
*/
public class ConcurrentSessionFilter extends GenericFilterBean {
// ~ Instance fields
// ================================================================================================
private final SessionRegistry sessionRegistry;
private String expiredUrl;
private RedirectStrategy redirectStrategy;
private LogoutHandler handlers = new CompositeLogoutHandler(new SecurityContextLogoutHandler());
private SessionInformationExpiredStrategy sessionInformationExpiredStrategy;
// ~ Methods
// ========================================================================================================
public ConcurrentSessionFilter(SessionRegistry sessionRegistry) {
Assert.notNull(sessionRegistry, "SessionRegistry required");
this.sessionRegistry = sessionRegistry;
this.sessionInformationExpiredStrategy = new ResponseBodySessionInformationExpiredStrategy();
}
/**
* Creates a new instance
*
* @param sessionRegistry the SessionRegistry to use
* @param expiredUrl the URL to redirect to
* @deprecated use {@link #ConcurrentSessionFilter(SessionRegistry, SessionInformationExpiredStrategy)} with {@link SimpleRedirectSessionInformationExpiredStrategy} instead.
*/
@Deprecated
public ConcurrentSessionFilter(SessionRegistry sessionRegistry, String expiredUrl) {
Assert.notNull(sessionRegistry, "SessionRegistry required");
Assert.isTrue(expiredUrl == null || UrlUtils.isValidRedirectUrl(expiredUrl),
() -> expiredUrl + " isn't a valid redirect URL");
this.expiredUrl = expiredUrl;
this.sessionRegistry = sessionRegistry;
this.sessionInformationExpiredStrategy = new SessionInformationExpiredStrategy() {
@Override
public void onExpiredSessionDetected(SessionInformationExpiredEvent event) throws IOException, ServletException {
HttpServletRequest request = event.getRequest();
HttpServletResponse response = event.getResponse();
SessionInformation info = event.getSessionInformation();
redirectStrategy.sendRedirect(request, response, determineExpiredUrl(request, info));
}
};
}
public ConcurrentSessionFilter(SessionRegistry sessionRegistry, SessionInformationExpiredStrategy sessionInformationExpiredStrategy) {
Assert.notNull(sessionRegistry, "sessionRegistry required");
Assert.notNull(sessionInformationExpiredStrategy, "sessionInformationExpiredStrategy cannot be null");
this.sessionRegistry = sessionRegistry;
this.sessionInformationExpiredStrategy = sessionInformationExpiredStrategy;
}
@Override
public void afterPropertiesSet() {
Assert.notNull(sessionRegistry, "SessionRegistry required");
}
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponse response = (HttpServletResponse) res;
HttpSession session = request.getSession(false);
if (session != null) {
SessionInformation info = sessionRegistry.getSessionInformation(session
.getId());
if (info != null) {
if (info.isExpired()) {
// Expired - abort processing
if (logger.isDebugEnabled()) {
logger.debug("Requested session ID "
+ request.getRequestedSessionId() + " has expired.");
}
doLogout(request, response);
this.sessionInformationExpiredStrategy.onExpiredSessionDetected(new SessionInformationExpiredEvent(info, request, response));
return;
}
else {
// Non-expired - update last request date/time
sessionRegistry.refreshLastRequest(info.getSessionId());
}
}
}
chain.doFilter(request, response);
}
/**
* Determine the URL for expiration
* @param request the HttpServletRequest
* @param info the {@link SessionInformation}
* @return the URL for expiration
* @deprecated Use {@link #ConcurrentSessionFilter(SessionRegistry, SessionInformationExpiredStrategy)} instead.
*/
@Deprecated
protected String determineExpiredUrl(HttpServletRequest request,
SessionInformation info) {
return expiredUrl;
}
private void doLogout(HttpServletRequest request, HttpServletResponse response) {
Authentication auth = SecurityContextHolder.getContext().getAuthentication();
this.handlers.logout(request, response, auth);
}
public void setLogoutHandlers(LogoutHandler[] handlers) {
this.handlers = new CompositeLogoutHandler(handlers);
}
/**
* Sets the {@link RedirectStrategy} used with {@link #ConcurrentSessionFilter(SessionRegistry, String)}
* @param redirectStrategy the {@link RedirectStrategy} to use
* @deprecated use {@link #ConcurrentSessionFilter(SessionRegistry, SessionInformationExpiredStrategy)} instead.
*/
@Deprecated
public void setRedirectStrategy(RedirectStrategy redirectStrategy) {
this.redirectStrategy = redirectStrategy;
}
/**
* A {@link SessionInformationExpiredStrategy} that writes an error message to the response body.
* @author Rob Winch
* @since 4.2
*/
private static final class ResponseBodySessionInformationExpiredStrategy
implements SessionInformationExpiredStrategy {
@Override
public void onExpiredSessionDetected(SessionInformationExpiredEvent event)
throws IOException, ServletException {
HttpServletResponse response = event.getResponse();
response.getWriter().print(
"This session has been expired (possibly due to multiple concurrent "
+ "logins being attempted as the same user).");
response.flushBuffer();
}
}
}