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//
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//
package org.eclipse.jetty.server.session;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;
import java.util.EnumSet;
import java.util.Enumeration;
import java.util.EventListener;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.stream.Collectors;
import jakarta.servlet.DispatcherType;
import jakarta.servlet.ServletException;
import jakarta.servlet.SessionCookieConfig;
import jakarta.servlet.SessionTrackingMode;
import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import jakarta.servlet.http.HttpSessionAttributeListener;
import jakarta.servlet.http.HttpSessionBindingEvent;
import jakarta.servlet.http.HttpSessionContext;
import jakarta.servlet.http.HttpSessionEvent;
import jakarta.servlet.http.HttpSessionIdListener;
import jakarta.servlet.http.HttpSessionListener;
import org.eclipse.jetty.http.BadMessageException;
import org.eclipse.jetty.http.HttpCookie;
import org.eclipse.jetty.http.Syntax;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.SessionIdManager;
import org.eclipse.jetty.server.handler.ContextHandler;
import org.eclipse.jetty.server.handler.ScopedHandler;
import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.annotation.ManagedAttribute;
import org.eclipse.jetty.util.annotation.ManagedObject;
import org.eclipse.jetty.util.annotation.ManagedOperation;
import org.eclipse.jetty.util.statistic.CounterStatistic;
import org.eclipse.jetty.util.statistic.SampleStatistic;
import org.eclipse.jetty.util.thread.AutoLock;
import org.eclipse.jetty.util.thread.ScheduledExecutorScheduler;
import org.eclipse.jetty.util.thread.Scheduler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static java.lang.Math.round;
/**
* SessionHandler.
*/
@ManagedObject
public class SessionHandler extends ScopedHandler
{
private static final Logger LOG = LoggerFactory.getLogger(SessionHandler.class);
public static final EnumSet DEFAULT_TRACKING = EnumSet.of(SessionTrackingMode.COOKIE,
SessionTrackingMode.URL);
/**
* Session cookie name.
* Defaults to JSESSIONID, but can be set with the
* org.eclipse.jetty.servlet.SessionCookie context init parameter.
*/
public static final String __SessionCookieProperty = "org.eclipse.jetty.servlet.SessionCookie";
public static final String __DefaultSessionCookie = "JSESSIONID";
/**
* Session id path parameter name.
* Defaults to jsessionid, but can be set with the
* org.eclipse.jetty.servlet.SessionIdPathParameterName context init parameter.
* If context init param is "none", or setSessionIdPathParameterName is called with null or "none",
* no URL rewriting will be done.
*/
public static final String __SessionIdPathParameterNameProperty = "org.eclipse.jetty.servlet.SessionIdPathParameterName";
public static final String __DefaultSessionIdPathParameterName = "jsessionid";
public static final String __CheckRemoteSessionEncoding = "org.eclipse.jetty.servlet.CheckingRemoteSessionIdEncoding";
/**
* Session Domain.
* If this property is set as a ServletContext InitParam, then it is
* used as the domain for session cookies. If it is not set, then
* no domain is specified for the session cookie.
*/
public static final String __SessionDomainProperty = "org.eclipse.jetty.servlet.SessionDomain";
public static final String __DefaultSessionDomain = null;
/**
* Session Path.
* If this property is set as a ServletContext InitParam, then it is
* used as the path for the session cookie. If it is not set, then
* the context path is used as the path for the cookie.
*/
public static final String __SessionPathProperty = "org.eclipse.jetty.servlet.SessionPath";
/**
* Session Max Age.
* If this property is set as a ServletContext InitParam, then it is
* used as the max age for the session cookie. If it is not set, then
* a max age of -1 is used.
*/
public static final String __MaxAgeProperty = "org.eclipse.jetty.servlet.MaxAge";
public static final Set DEFAULT_SESSION_TRACKING_MODES =
Collections.unmodifiableSet(
new HashSet<>(
Arrays.asList(SessionTrackingMode.COOKIE, SessionTrackingMode.URL)));
@SuppressWarnings("unchecked")
public static final Class[] SESSION_LISTENER_TYPES =
new Class[]
{
HttpSessionAttributeListener.class,
HttpSessionIdListener.class,
HttpSessionListener.class
};
@Deprecated(since = "Servlet API 2.1")
static final HttpSessionContext __nullSessionContext = new HttpSessionContext()
{
@Override
@Deprecated(since = "Servlet API 2.1")
public HttpSession getSession(String sessionId)
{
return null;
}
@Override
@Deprecated(since = "Servlet API 2.1")
@SuppressWarnings({"rawtypes", "unchecked"})
public Enumeration getIds()
{
return Collections.enumeration(Collections.EMPTY_LIST);
}
};
/**
* Setting of max inactive interval for new sessions
* -1 means no timeout
*/
protected int _dftMaxIdleSecs = -1;
protected boolean _httpOnly = false;
protected SessionIdManager _sessionIdManager;
protected boolean _secureCookies = false;
protected boolean _secureRequestOnly = true;
protected final List _sessionAttributeListeners = new CopyOnWriteArrayList<>();
protected final List _sessionListeners = new CopyOnWriteArrayList<>();
protected final List _sessionIdListeners = new CopyOnWriteArrayList<>();
protected ClassLoader _loader;
protected ContextHandler.Context _context;
protected SessionContext _sessionContext;
protected String _sessionCookie = __DefaultSessionCookie;
protected String _sessionIdPathParameterName = __DefaultSessionIdPathParameterName;
protected String _sessionIdPathParameterNamePrefix = ";" + _sessionIdPathParameterName + "=";
protected String _sessionDomain;
protected String _sessionPath;
protected int _maxCookieAge = -1;
protected int _refreshCookieAge;
protected boolean _checkingRemoteSessionIdEncoding;
protected String _sessionComment;
protected SessionCache _sessionCache;
protected final SampleStatistic _sessionTimeStats = new SampleStatistic();
protected final CounterStatistic _sessionsCreatedStats = new CounterStatistic();
public Set _sessionTrackingModes;
protected boolean _usingURLs;
protected boolean _usingCookies = true;
protected Set _candidateSessionIdsForExpiry = ConcurrentHashMap.newKeySet();
protected Scheduler _scheduler;
protected boolean _ownScheduler = false;
/**
* Constructor.
*/
public SessionHandler()
{
setSessionTrackingModes(DEFAULT_SESSION_TRACKING_MODES);
}
@ManagedAttribute("path of the session cookie, or null for default")
public String getSessionPath()
{
return _sessionPath;
}
@ManagedAttribute("if greater the zero, the time in seconds a session cookie will last for")
public int getMaxCookieAge()
{
return _maxCookieAge;
}
/**
* Called by the {@link SessionHandler} when a session is first accessed by a request.
*
* Updates the last access time for the session and generates a fresh cookie if necessary.
*
* @param session the session object
* @param secure whether the request is secure or not
* @return the session cookie. If not null, this cookie should be set on the response to either migrate
* the session or to refresh a session cookie that may expire.
* @see #complete(HttpSession)
*/
public HttpCookie access(HttpSession session, boolean secure)
{
long now = System.currentTimeMillis();
Session s = ((SessionIf)session).getSession();
if (s.access(now))
{
// Do we need to refresh the cookie?
if (isUsingCookies() &&
(s.isIdChanged() ||
(getSessionCookieConfig().getMaxAge() > 0 && getRefreshCookieAge() > 0 &&
((now - s.getCookieSetTime()) / 1000 > getRefreshCookieAge()))))
{
HttpCookie cookie = getSessionCookie(session, _context == null ? "/" : (_context.getContextPath()), secure);
s.cookieSet();
s.setIdChanged(false);
return cookie;
}
}
return null;
}
/**
* Adds an event listener for session-related events.
*
* @param listener the session event listener to add
* Individual SessionManagers implementations may accept arbitrary listener types,
* but they are expected to at least handle HttpSessionActivationListener,
* HttpSessionAttributeListener, HttpSessionBindingListener and HttpSessionListener.
* @return true if the listener was added
* @see #removeEventListener(EventListener)
* @see HttpSessionAttributeListener
* @see HttpSessionListener
* @see HttpSessionIdListener
*/
@Override
public boolean addEventListener(EventListener listener)
{
if (super.addEventListener(listener))
{
if (listener instanceof HttpSessionAttributeListener)
_sessionAttributeListeners.add((HttpSessionAttributeListener)listener);
if (listener instanceof HttpSessionListener)
_sessionListeners.add((HttpSessionListener)listener);
if (listener instanceof HttpSessionIdListener)
_sessionIdListeners.add((HttpSessionIdListener)listener);
return true;
}
return false;
}
/**
* Call the session lifecycle listeners in
* the reverse order they were added.
*
* @param session the session on which to call the lifecycle listeners
*/
protected void callSessionDestroyedListeners(Session session)
{
if (session == null)
return;
if (_sessionListeners != null)
{
//We annoint the calling thread with
//the webapp's classloader because the calling thread may
//come from the scavenger, rather than a request thread
Runnable r = new Runnable()
{
@Override
public void run()
{
HttpSessionEvent event = new HttpSessionEvent(session);
for (int i = _sessionListeners.size() - 1; i >= 0; i--)
{
_sessionListeners.get(i).sessionDestroyed(event);
}
}
};
_sessionContext.run(r);
}
}
/**
* Call the session lifecycle listeners in the order
* they were added.
*
* @param session the session on which to call the lifecycle listeners
*/
protected void callSessionCreatedListeners(Session session)
{
if (session == null)
return;
if (_sessionListeners != null)
{
HttpSessionEvent event = new HttpSessionEvent(session);
for (HttpSessionListener l : _sessionListeners)
{
l.sessionCreated(event);
}
}
}
protected void callSessionIdListeners(Session session, String oldId)
{
//inform the listeners
if (!_sessionIdListeners.isEmpty())
{
HttpSessionEvent event = new HttpSessionEvent(session);
for (HttpSessionIdListener l : _sessionIdListeners)
{
l.sessionIdChanged(event, oldId);
}
}
}
/**
* Called when a request is finally leaving a session.
*
* @param session the session object
*/
public void complete(HttpSession session)
{
if (LOG.isDebugEnabled())
LOG.debug("Complete called with session {}", session);
if (session == null)
return;
Session s = ((SessionIf)session).getSession();
try
{
_sessionCache.release(s.getId(), s);
}
catch (Exception e)
{
LOG.warn("Unable to release Session {}", s, e);
}
}
/**
* Called when a response is about to be committed.
* We might take this opportunity to persist the session
* so that any subsequent requests to other servers
* will see the modifications.
*/
public void commit(HttpSession session)
{
if (session == null)
return;
Session s = ((SessionIf)session).getSession();
try
{
_sessionCache.commit(s);
}
catch (Exception e)
{
LOG.warn("Unable to commit Session {}", s, e);
}
}
@Override
protected void doStart() throws Exception
{
//check if session management is set up, if not set up HashSessions
final Server server = getServer();
_context = ContextHandler.getCurrentContext();
_loader = Thread.currentThread().getContextClassLoader();
// Use a coarser lock to serialize concurrent start of many contexts.
synchronized (server)
{
//Get a SessionDataStore and a SessionDataStore, falling back to in-memory sessions only
if (_sessionCache == null)
{
SessionCacheFactory ssFactory = server.getBean(SessionCacheFactory.class);
setSessionCache(ssFactory != null ? ssFactory.getSessionCache(this) : new DefaultSessionCache(this));
SessionDataStore sds = null;
SessionDataStoreFactory sdsFactory = server.getBean(SessionDataStoreFactory.class);
if (sdsFactory != null)
sds = sdsFactory.getSessionDataStore(this);
else
sds = new NullSessionDataStore();
_sessionCache.setSessionDataStore(sds);
}
if (_sessionIdManager == null)
{
_sessionIdManager = server.getSessionIdManager();
if (_sessionIdManager == null)
{
//create a default SessionIdManager and set it as the shared
//SessionIdManager for the Server, being careful NOT to use
//the webapp context's classloader, otherwise if the context
//is stopped, the classloader is leaked.
ClassLoader serverLoader = server.getClass().getClassLoader();
try
{
Thread.currentThread().setContextClassLoader(serverLoader);
_sessionIdManager = new DefaultSessionIdManager(server);
server.setSessionIdManager(_sessionIdManager);
server.manage(_sessionIdManager);
_sessionIdManager.start();
}
finally
{
Thread.currentThread().setContextClassLoader(_loader);
}
}
// server session id is never managed by this manager
addBean(_sessionIdManager, false);
}
_scheduler = server.getBean(Scheduler.class);
if (_scheduler == null)
{
_scheduler = new ScheduledExecutorScheduler(String.format("Session-Scheduler-%x", hashCode()), false);
_ownScheduler = true;
_scheduler.start();
}
}
// Look for a session cookie name
if (_context != null)
{
String tmp = _context.getInitParameter(__SessionCookieProperty);
if (tmp != null)
_sessionCookie = tmp;
tmp = _context.getInitParameter(__SessionIdPathParameterNameProperty);
if (tmp != null)
setSessionIdPathParameterName(tmp);
// set up the max session cookie age if it isn't already
if (_maxCookieAge == -1)
{
tmp = _context.getInitParameter(__MaxAgeProperty);
if (tmp != null)
_maxCookieAge = Integer.parseInt(tmp.trim());
}
// set up the session domain if it isn't already
if (_sessionDomain == null)
_sessionDomain = _context.getInitParameter(__SessionDomainProperty);
// set up the sessionPath if it isn't already
if (_sessionPath == null)
_sessionPath = _context.getInitParameter(__SessionPathProperty);
tmp = _context.getInitParameter(__CheckRemoteSessionEncoding);
if (tmp != null)
_checkingRemoteSessionIdEncoding = Boolean.parseBoolean(tmp);
}
_sessionContext = new SessionContext(_sessionIdManager.getWorkerName(), _context);
_sessionCache.initialize(_sessionContext);
super.doStart();
}
@Override
protected void doStop() throws Exception
{
// Destroy sessions before destroying servlets/filters see JETTY-1266
shutdownSessions();
_sessionCache.stop();
if (_ownScheduler && _scheduler != null)
_scheduler.stop();
_scheduler = null;
super.doStop();
_loader = null;
}
/**
* @return true if session cookies should be HTTP-only (Microsoft extension)
* @see org.eclipse.jetty.http.HttpCookie#isHttpOnly()
*/
@ManagedAttribute("true if cookies use the http only flag")
public boolean getHttpOnly()
{
return _httpOnly;
}
/**
* @return The sameSite setting for session cookies or null for no setting
* @see HttpCookie#getSameSite()
*/
@ManagedAttribute("SameSite setting for session cookies")
public HttpCookie.SameSite getSameSite()
{
return HttpCookie.getSameSiteFromComment(_sessionComment);
}
/**
* Returns the HttpSession with the given session id
*
* @param extendedId the session id
* @return the HttpSession with the corresponding id or null if no session with the given id exists
*/
protected HttpSession getHttpSession(String extendedId)
{
String id = getSessionIdManager().getId(extendedId);
Session session = getSession(id);
if (session != null && !session.getExtendedId().equals(extendedId))
session.setIdChanged(true);
return session;
}
/**
* Gets the cross context session id manager
*
* @return the session id manager
*/
@ManagedAttribute("Session ID Manager")
public SessionIdManager getSessionIdManager()
{
return _sessionIdManager;
}
/**
* @return the max period of inactivity, after which the session is invalidated, in seconds.
* @see #setMaxInactiveInterval(int)
*/
@ManagedAttribute("default maximum time a session may be idle for (in s)")
public int getMaxInactiveInterval()
{
return _dftMaxIdleSecs;
}
@ManagedAttribute("time before a session cookie is re-set (in s)")
public int getRefreshCookieAge()
{
return _refreshCookieAge;
}
/**
* @return same as SessionCookieConfig.getSecure(). If true, session
* cookies are ALWAYS marked as secure. If false, a session cookie is
* ONLY marked as secure if _secureRequestOnly == true and it is an HTTPS request.
*/
@ManagedAttribute("if true, secure cookie flag is set on session cookies")
public boolean getSecureCookies()
{
return _secureCookies;
}
/**
* @return true if session cookie is to be marked as secure only on HTTPS requests
*/
public boolean isSecureRequestOnly()
{
return _secureRequestOnly;
}
/**
* HTTPS request. Can be overridden by setting SessionCookieConfig.setSecure(true),
* in which case the session cookie will be marked as secure on both HTTPS and HTTP.
*
* @param secureRequestOnly true to set Session Cookie Config as secure
*/
public void setSecureRequestOnly(boolean secureRequestOnly)
{
_secureRequestOnly = secureRequestOnly;
}
@ManagedAttribute("the set session cookie")
public String getSessionCookie()
{
return _sessionCookie;
}
/**
* A session cookie is marked as secure IFF any of the following conditions are true:
*
* - SessionCookieConfig.setSecure == true
* - SessionCookieConfig.setSecure == false && _secureRequestOnly==true && request is HTTPS
*
* According to SessionCookieConfig javadoc, case 1 can be used when:
* "... even though the request that initiated the session came over HTTP,
* is to support a topology where the web container is front-ended by an
* SSL offloading load balancer. In this case, the traffic between the client
* and the load balancer will be over HTTPS, whereas the traffic between the
* load balancer and the web container will be over HTTP."
*
* For case 2, you can use _secureRequestOnly to determine if you want the
* Servlet Spec 3.0 default behavior when SessionCookieConfig.setSecure==false,
* which is:
*
* "they shall be marked as secure only if the request that initiated the
* corresponding session was also secure"
*
*
* The default for _secureRequestOnly is true, which gives the above behavior. If
* you set it to false, then a session cookie is NEVER marked as secure, even if
* the initiating request was secure.
*
* @param session the session to which the cookie should refer.
* @param contextPath the context to which the cookie should be linked.
* The client will only send the cookie value when requesting resources under this path.
* @param requestIsSecure whether the client is accessing the server over a secure protocol (i.e. HTTPS).
* @return if this SessionManager uses cookies, then this method will return a new
* {@link Cookie cookie object} that should be set on the client in order to link future HTTP requests
* with the session. If cookies are not in use, this method returns null.
*/
public HttpCookie getSessionCookie(HttpSession session, String contextPath, boolean requestIsSecure)
{
if (isUsingCookies())
{
SessionCookieConfig cookieConfig = getSessionCookieConfig();
String sessionPath = (cookieConfig.getPath() == null) ? contextPath : cookieConfig.getPath();
sessionPath = (StringUtil.isEmpty(sessionPath)) ? "/" : sessionPath;
String id = getExtendedId(session);
HttpCookie cookie = null;
cookie = new HttpCookie(
getSessionCookieName(_cookieConfig),
id,
cookieConfig.getDomain(),
sessionPath,
cookieConfig.getMaxAge(),
cookieConfig.isHttpOnly(),
cookieConfig.isSecure() || (isSecureRequestOnly() && requestIsSecure),
HttpCookie.getCommentWithoutAttributes(cookieConfig.getComment()),
0,
HttpCookie.getSameSiteFromComment(cookieConfig.getComment()));
return cookie;
}
return null;
}
@ManagedAttribute("domain of the session cookie, or null for the default")
public String getSessionDomain()
{
return _sessionDomain;
}
@ManagedAttribute("number of sessions created by this node")
public int getSessionsCreated()
{
return (int)_sessionsCreatedStats.getCurrent();
}
/**
* @return the URL path parameter name for session id URL rewriting, by default "jsessionid".
* @see #setSessionIdPathParameterName(String)
*/
@ManagedAttribute("name of use for URL session tracking")
public String getSessionIdPathParameterName()
{
return _sessionIdPathParameterName;
}
/**
* @return a formatted version of {@link #getSessionIdPathParameterName()}, by default
* ";" + sessionIdParameterName + "=", for easier lookup in URL strings.
* @see #getSessionIdPathParameterName()
*/
public String getSessionIdPathParameterNamePrefix()
{
return _sessionIdPathParameterNamePrefix;
}
/**
* @return whether the session management is handled via cookies.
*/
public boolean isUsingCookies()
{
return _usingCookies;
}
/**
* @param session the session to test for validity
* @return whether the given session is valid, that is, it has not been invalidated.
*/
public boolean isValid(HttpSession session)
{
Session s = ((SessionIf)session).getSession();
return s.isValid();
}
/**
* @param session the session object
* @return the unique id of the session within the cluster (without a node id extension)
* @see #getExtendedId(HttpSession)
*/
public String getId(HttpSession session)
{
Session s = ((SessionIf)session).getSession();
return s.getId();
}
/**
* @param session the session object
* @return the unique id of the session within the cluster, extended with an optional node id.
* @see #getId(HttpSession)
*/
public String getExtendedId(HttpSession session)
{
Session s = ((SessionIf)session).getSession();
return s.getExtendedId();
}
/**
* Creates a new HttpSession.
*
* @param request the HttpServletRequest containing the requested session id
* @return the new HttpSession
*/
public HttpSession newHttpSession(HttpServletRequest request)
{
long created = System.currentTimeMillis();
String id = _sessionIdManager.newSessionId(request, created);
Session session = _sessionCache.newSession(request, id, created, (_dftMaxIdleSecs > 0 ? _dftMaxIdleSecs * 1000L : -1));
session.setExtendedId(_sessionIdManager.getExtendedId(id, request));
session.getSessionData().setLastNode(_sessionIdManager.getWorkerName());
try
{
_sessionCache.add(id, session);
Request baseRequest = Request.getBaseRequest(request);
baseRequest.setSession(session);
baseRequest.enterSession(session);
_sessionsCreatedStats.increment();
if (request != null && request.isSecure())
session.setAttribute(Session.SESSION_CREATED_SECURE, Boolean.TRUE);
callSessionCreatedListeners(session);
return session;
}
catch (Exception e)
{
LOG.warn("Unable to add Session {}", id, e);
return null;
}
}
@Override
public boolean removeEventListener(EventListener listener)
{
if (super.removeEventListener(listener))
{
if (listener instanceof HttpSessionAttributeListener)
_sessionAttributeListeners.remove(listener);
if (listener instanceof HttpSessionListener)
_sessionListeners.remove(listener);
if (listener instanceof HttpSessionIdListener)
_sessionIdListeners.remove(listener);
return true;
}
return false;
}
/**
* Reset statistics values
*/
@ManagedOperation(value = "reset statistics", impact = "ACTION")
public void statsReset()
{
_sessionsCreatedStats.reset();
_sessionTimeStats.reset();
}
/**
* Set if Session cookies should use HTTP Only
*
* @param httpOnly True if cookies should be HttpOnly.
* @see HttpCookie
*/
public void setHttpOnly(boolean httpOnly)
{
_httpOnly = httpOnly;
}
/**
* Set Session cookie sameSite mode.
* Currently this is encoded in the session comment until sameSite is supported by {@link SessionCookieConfig}
*
* @param sameSite The sameSite setting for Session cookies (or null for no sameSite setting)
*/
public void setSameSite(HttpCookie.SameSite sameSite)
{
// Encode in comment whilst not supported by SessionConfig, so that it can be set/saved in
// web.xml and quickstart.
// Always pass false for httpOnly as it has it's own setter.
_sessionComment = HttpCookie.getCommentWithAttributes(_sessionComment, false, sameSite);
}
/**
* @param metaManager The metaManager used for cross context session management.
*/
public void setSessionIdManager(SessionIdManager metaManager)
{
updateBean(_sessionIdManager, metaManager);
_sessionIdManager = metaManager;
}
/**
* Sets the max period of inactivity, after which the session is invalidated, in seconds.
*
* @param seconds the max inactivity period, in seconds.
* @see #getMaxInactiveInterval()
*/
public void setMaxInactiveInterval(int seconds)
{
_dftMaxIdleSecs = seconds;
if (LOG.isDebugEnabled())
{
if (_dftMaxIdleSecs <= 0)
LOG.debug("Sessions created by this manager are immortal (default maxInactiveInterval={})", _dftMaxIdleSecs);
else
LOG.debug("SessionManager default maxInactiveInterval={}", _dftMaxIdleSecs);
}
}
public void setRefreshCookieAge(int ageInSeconds)
{
_refreshCookieAge = ageInSeconds;
}
public void setSessionCookie(String cookieName)
{
_sessionCookie = cookieName;
}
/**
* Sets the session id URL path parameter name.
*
* @param param the URL path parameter name for session id URL rewriting (null or "none" for no rewriting).
* @see #getSessionIdPathParameterName()
* @see #getSessionIdPathParameterNamePrefix()
*/
public void setSessionIdPathParameterName(String param)
{
_sessionIdPathParameterName = (param == null || "none".equals(param)) ? null : param;
_sessionIdPathParameterNamePrefix = (param == null || "none".equals(param))
? null : (";" + _sessionIdPathParameterName + "=");
}
/**
* @param usingCookies The usingCookies to set.
*/
public void setUsingCookies(boolean usingCookies)
{
_usingCookies = usingCookies;
}
/**
* Get a known existing session
*
* @param id The session ID stripped of any worker name.
* @return A Session or null if none exists.
*/
public Session getSession(String id)
{
try
{
Session session = _sessionCache.get(id);
if (session != null)
{
//If the session we got back has expired
if (session.isExpiredAt(System.currentTimeMillis()))
{
//Expire the session
try
{
session.invalidate();
}
catch (Exception e)
{
LOG.warn("Invalidating session {} found to be expired when requested", id, e);
}
return null;
}
session.setExtendedId(_sessionIdManager.getExtendedId(id, null));
}
return session;
}
catch (UnreadableSessionDataException e)
{
LOG.warn("Error loading session {}", id, e);
try
{
//tell id mgr to remove session from all other contexts
getSessionIdManager().invalidateAll(id);
}
catch (Exception x)
{
LOG.warn("Error cross-context invalidating unreadable session {}", id, x);
}
return null;
}
catch (Exception other)
{
LOG.warn("Unable to get Session", other);
return null;
}
}
/**
* Prepare sessions for session manager shutdown
*
* @throws Exception if unable to shutdown sesssions
*/
protected void shutdownSessions() throws Exception
{
_sessionCache.shutdown();
}
/**
* @return the session store
*/
public SessionCache getSessionCache()
{
return _sessionCache;
}
/**
* @param cache the session store to use
*/
public void setSessionCache(SessionCache cache)
{
updateBean(_sessionCache, cache);
_sessionCache = cache;
}
/**
* Remove session from manager
*
* @param id The session to remove
* @param invalidate True if {@link HttpSessionListener#sessionDestroyed(HttpSessionEvent)} and
* {@link SessionIdManager#expireAll(String)} should be called.
* @return if the session was removed
*/
public Session removeSession(String id, boolean invalidate)
{
try
{
//Remove the Session object from the session store and any backing data store
Session session = _sessionCache.delete(id);
if (session != null)
{
if (invalidate)
{
session.beginInvalidate();
if (_sessionListeners != null)
{
HttpSessionEvent event = new HttpSessionEvent(session);
for (int i = _sessionListeners.size() - 1; i >= 0; i--)
{
_sessionListeners.get(i).sessionDestroyed(event);
}
}
}
}
//TODO if session object is not known to this node, how to get rid of it if no other
//node knows about it?
return session;
}
catch (Exception e)
{
LOG.warn("Unable to remove Session", e);
return null;
}
}
/**
* @return maximum amount of time session remained valid
*/
@ManagedAttribute("maximum amount of time sessions have remained active (in s)")
public long getSessionTimeMax()
{
return _sessionTimeStats.getMax();
}
public Set getDefaultSessionTrackingModes()
{
return DEFAULT_SESSION_TRACKING_MODES;
}
public Set getEffectiveSessionTrackingModes()
{
return Collections.unmodifiableSet(_sessionTrackingModes);
}
public void setSessionTrackingModes(Set sessionTrackingModes)
{
if (sessionTrackingModes != null &&
sessionTrackingModes.size() > 1 &&
sessionTrackingModes.contains(SessionTrackingMode.SSL))
{
throw new IllegalArgumentException("sessionTrackingModes specifies a combination of SessionTrackingMode.SSL with a session tracking mode other than SessionTrackingMode.SSL");
}
_sessionTrackingModes = new HashSet<>(sessionTrackingModes);
_usingCookies = _sessionTrackingModes.contains(SessionTrackingMode.COOKIE);
_usingURLs = _sessionTrackingModes.contains(SessionTrackingMode.URL);
}
/**
* @return whether the session management is handled via URLs.
*/
public boolean isUsingURLs()
{
return _usingURLs;
}
public SessionCookieConfig getSessionCookieConfig()
{
return _cookieConfig;
}
private SessionCookieConfig _cookieConfig =
new CookieConfig();
/**
* @return total amount of time all sessions remained valid
*/
@ManagedAttribute("total time sessions have remained valid")
public long getSessionTimeTotal()
{
return _sessionTimeStats.getTotal();
}
/**
* @return mean amount of time session remained valid
*/
@ManagedAttribute("mean time sessions remain valid (in s)")
public double getSessionTimeMean()
{
return _sessionTimeStats.getMean();
}
/**
* @return standard deviation of amount of time session remained valid
*/
@ManagedAttribute("standard deviation a session remained valid (in s)")
public double getSessionTimeStdDev()
{
return _sessionTimeStats.getStdDev();
}
/**
* @return True if absolute URLs are check for remoteness before being session encoded.
*/
@ManagedAttribute("check remote session id encoding")
public boolean isCheckingRemoteSessionIdEncoding()
{
return _checkingRemoteSessionIdEncoding;
}
/**
* @param remote True if absolute URLs are check for remoteness before being session encoded.
*/
public void setCheckingRemoteSessionIdEncoding(boolean remote)
{
_checkingRemoteSessionIdEncoding = remote;
}
/**
* Change the existing session id.
*
* @param oldId the old session id
* @param oldExtendedId the session id including worker suffix
* @param newId the new session id
* @param newExtendedId the new session id including worker suffix
*/
public void renewSessionId(String oldId, String oldExtendedId, String newId, String newExtendedId)
{
Session session = null;
try
{
//the use count for the session will be incremented in renewSessionId
session = _sessionCache.renewSessionId(oldId, newId, oldExtendedId, newExtendedId); //swap the id over
if (session == null)
{
//session doesn't exist on this context
return;
}
//inform the listeners
callSessionIdListeners(session, oldId);
}
catch (Exception e)
{
LOG.warn("Unable to renew Session Id {}:{} -> {}:{}", oldId, oldExtendedId, newId, newExtendedId, e);
}
finally
{
if (session != null)
{
try
{
_sessionCache.release(newId, session);
}
catch (Exception e)
{
LOG.warn("Unable to release {}", newId, e);
}
}
}
}
/**
* Record length of time session has been active. Called when the
* session is about to be invalidated.
*
* @param session the session whose time to record
*/
protected void recordSessionTime(Session session)
{
_sessionTimeStats.record(round((System.currentTimeMillis() - session.getSessionData().getCreated()) / 1000.0));
}
/**
* Called by SessionIdManager to remove a session that has been invalidated,
* either by this context or another context. Also called by
* SessionIdManager when a session has expired in either this context or
* another context.
*
* @param id the session id to invalidate
*/
public void invalidate(String id)
{
if (StringUtil.isBlank(id))
return;
try
{
// Remove the Session object from the session cache and any backing
// data store
Session session = _sessionCache.delete(id);
if (session != null)
{
//start invalidating if it is not already begun, and call the listeners
try
{
if (session.beginInvalidate())
{
try
{
callSessionDestroyedListeners(session);
}
catch (Exception e)
{
LOG.warn("Error during Session destroy listener", e);
}
//call the attribute removed listeners and finally mark it as invalid
session.finishInvalidate();
}
}
catch (IllegalStateException e)
{
if (LOG.isDebugEnabled())
LOG.debug("Session {} already invalid", session, e);
}
}
}
catch (Exception e)
{
LOG.warn("Unable to delete Session {}", id, e);
}
}
/**
* Called periodically by the HouseKeeper to handle the list of
* sessions that have expired since the last call to scavenge.
*/
public void scavenge()
{
//don't attempt to scavenge if we are shutting down
if (isStopping() || isStopped())
return;
if (LOG.isDebugEnabled())
LOG.debug("{} scavenging sessions", this);
//Get a snapshot of the candidates as they are now. Others that
//arrive during this processing will be dealt with on
//subsequent call to scavenge
String[] ss = _candidateSessionIdsForExpiry.toArray(new String[0]);
Set candidates = new HashSet<>(Arrays.asList(ss));
_candidateSessionIdsForExpiry.removeAll(candidates);
if (LOG.isDebugEnabled())
LOG.debug("{} scavenging session ids {}", this, candidates);
try
{
candidates = _sessionCache.checkExpiration(candidates);
for (String id : candidates)
{
try
{
getSessionIdManager().expireAll(id);
}
catch (Exception e)
{
LOG.warn("Unable to expire Session {}", id, e);
}
}
}
catch (Exception e)
{
LOG.warn("Failed to check expiration on {}",
candidates.stream().map(Objects::toString).collect(Collectors.joining(", ", "[", "]")),
e);
}
}
/**
* Each session has a timer that is configured to go off
* when either the session has not been accessed for a
* configurable amount of time, or the session itself
* has passed its expiry.
*
* If it has passed its expiry, then we will mark it for
* scavenging by next run of the HouseKeeper; if it has
* been idle longer than the configured eviction period,
* we evict from the cache.
*
* If none of the above are true, then the System timer
* is inconsistent and the caller of this method will
* need to reset the timer.
*
* @param session the session
* @param now the time at which to check for expiry
*/
public void sessionInactivityTimerExpired(Session session, long now)
{
if (session == null)
return;
//check if the session is:
//1. valid
//2. expired
//3. idle
try (AutoLock lock = session.lock())
{
if (session.getRequests() > 0)
return; //session can't expire or be idle if there is a request in it
if (LOG.isDebugEnabled())
LOG.debug("Inspecting session {}, valid={}", session.getId(), session.isValid());
if (!session.isValid())
return; //do nothing, session is no longer valid
if (session.isExpiredAt(now))
{
//instead of expiring the session directly here, accumulate a list of
//session ids that need to be expired. This is an efficiency measure: as
//the expiration involves the SessionDataStore doing a delete, it is
//most efficient if it can be done as a bulk operation to eg reduce
//roundtrips to the persistent store. Only do this if the HouseKeeper that
//does the scavenging is configured to actually scavenge
if (_sessionIdManager.getSessionHouseKeeper() != null &&
_sessionIdManager.getSessionHouseKeeper().getIntervalSec() > 0)
{
_candidateSessionIdsForExpiry.add(session.getId());
if (LOG.isDebugEnabled())
LOG.debug("Session {} is candidate for expiry", session.getId());
}
}
else
{
//possibly evict the session
_sessionCache.checkInactiveSession(session);
}
}
}
/**
* Check if id is in use by this context
*
* @param id identity of session to check
* @return true if this manager knows about this id
* @throws Exception if any error occurred
*/
public boolean isIdInUse(String id) throws Exception
{
//Ask the session store
return _sessionCache.exists(id);
}
public Scheduler getScheduler()
{
return _scheduler;
}
/**
* SessionIf
*
* Interface that any session wrapper should implement so that
* SessionManager may access the Jetty session implementation.
*/
public interface SessionIf extends HttpSession
{
public Session getSession();
}
public static String getSessionCookieName(SessionCookieConfig config)
{
if (config == null || config.getName() == null)
return __DefaultSessionCookie;
return config.getName();
}
/**
* CookieConfig
*
* Implementation of the jakarta.servlet.SessionCookieConfig.
* SameSite configuration can be achieved by using setComment
*
* @see HttpCookie
*/
public final class CookieConfig implements SessionCookieConfig
{
@Override
public String getComment()
{
return _sessionComment;
}
@Override
public String getDomain()
{
return _sessionDomain;
}
@Override
public int getMaxAge()
{
return _maxCookieAge;
}
@Override
public String getName()
{
return _sessionCookie;
}
@Override
public String getPath()
{
return _sessionPath;
}
@Override
public boolean isHttpOnly()
{
return _httpOnly;
}
@Override
public boolean isSecure()
{
return _secureCookies;
}
@Override
public void setComment(String comment)
{
if (_context != null && _context.getContextHandler().isAvailable())
throw new IllegalStateException("CookieConfig cannot be set after ServletContext is started");
_sessionComment = comment;
}
@Override
public void setDomain(String domain)
{
if (_context != null && _context.getContextHandler().isAvailable())
throw new IllegalStateException("CookieConfig cannot be set after ServletContext is started");
_sessionDomain = domain;
}
@Override
public void setHttpOnly(boolean httpOnly)
{
if (_context != null && _context.getContextHandler().isAvailable())
throw new IllegalStateException("CookieConfig cannot be set after ServletContext is started");
_httpOnly = httpOnly;
}
@Override
public void setMaxAge(int maxAge)
{
if (_context != null && _context.getContextHandler().isAvailable())
throw new IllegalStateException("CookieConfig cannot be set after ServletContext is started");
_maxCookieAge = maxAge;
}
@Override
public void setName(String name)
{
if (_context != null && _context.getContextHandler().isAvailable())
throw new IllegalStateException("CookieConfig cannot be set after ServletContext is started");
if ("".equals(name))
throw new IllegalArgumentException("Blank cookie name");
if (name != null)
Syntax.requireValidRFC2616Token(name, "Bad Session cookie name");
_sessionCookie = name;
}
@Override
public void setPath(String path)
{
if (_context != null && _context.getContextHandler().isAvailable())
throw new IllegalStateException("CookieConfig cannot be set after ServletContext is started");
_sessionPath = path;
}
@Override
public void setSecure(boolean secure)
{
if (_context != null && _context.getContextHandler().isAvailable())
throw new IllegalStateException("CookieConfig cannot be set after ServletContext is started");
_secureCookies = secure;
}
}
public void doSessionAttributeListeners(Session session, String name, Object old, Object value)
{
if (!_sessionAttributeListeners.isEmpty())
{
HttpSessionBindingEvent event = new HttpSessionBindingEvent(session, name, old == null ? value : old);
for (HttpSessionAttributeListener l : _sessionAttributeListeners)
{
if (old == null)
l.attributeAdded(event);
else if (value == null)
l.attributeRemoved(event);
else
l.attributeReplaced(event);
}
}
}
@Override
public void doScope(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
{
SessionHandler oldSessionHandler = null;
HttpSession oldSession = null;
HttpSession existingSession = null;
try
{
if (LOG.isDebugEnabled())
LOG.debug("Entering scope {}, dispatch={} asyncstarted={}", this, baseRequest.getDispatcherType(), baseRequest
.isAsyncStarted());
switch (baseRequest.getDispatcherType())
{
case REQUEST:
{
//there are no previous sessionhandlers or sessions for dispatch=REQUEST
//look for a session for this context
baseRequest.setSession(null);
checkRequestedSessionId(baseRequest, request);
existingSession = baseRequest.getSession(false);
baseRequest.setSessionHandler(this);
baseRequest.setSession(existingSession); //can be null
break;
}
case ASYNC:
case ERROR:
case FORWARD:
case INCLUDE:
{
//remember previous sessionhandler and session
oldSessionHandler = baseRequest.getSessionHandler();
oldSession = baseRequest.getSession(false);
if (oldSessionHandler != this)
{
//find any existing session for this request that has already been accessed
existingSession = baseRequest.getSession(this);
if (existingSession == null)
{
//session for this context has not been visited previously,
//try getting it
baseRequest.setSession(null);
checkRequestedSessionId(baseRequest, request);
existingSession = baseRequest.getSession(false);
}
baseRequest.setSession(existingSession);
baseRequest.setSessionHandler(this);
}
break;
}
default:
break;
}
if ((existingSession != null) && (oldSessionHandler != this))
{
HttpCookie cookie = access(existingSession, request.isSecure());
// Handle changed ID or max-age refresh, but only if this is not a redispatched request
if ((cookie != null) &&
(request.getDispatcherType() == DispatcherType.ASYNC ||
request.getDispatcherType() == DispatcherType.REQUEST))
baseRequest.getResponse().replaceCookie(cookie);
}
if (LOG.isDebugEnabled())
LOG.debug("sessionHandler={} session={}", this, existingSession);
if (_nextScope != null)
_nextScope.doScope(target, baseRequest, request, response);
else if (_outerScope != null)
_outerScope.doHandle(target, baseRequest, request, response);
else
doHandle(target, baseRequest, request, response);
}
finally
{
if (LOG.isDebugEnabled())
LOG.debug("Leaving scope {} dispatch={}, async={}, session={}, oldsession={}, oldsessionhandler={}",
this, baseRequest.getDispatcherType(), baseRequest.isAsyncStarted(), baseRequest.getSession(false),
oldSession, oldSessionHandler);
// revert the session handler to the previous, unless it was null, in which case remember it as
// the first session handler encountered.
if (oldSessionHandler != null && oldSessionHandler != this)
{
baseRequest.setSessionHandler(oldSessionHandler);
baseRequest.setSession(oldSession);
}
}
}
@Override
public void doHandle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
{
nextHandle(target, baseRequest, request, response);
}
/**
* Look for a requested session ID in cookies and URI parameters
*
* @param baseRequest the request to check
* @param request the request to check
*/
protected void checkRequestedSessionId(Request baseRequest, HttpServletRequest request)
{
String requestedSessionId = request.getRequestedSessionId();
if (requestedSessionId != null)
{
HttpSession session = getHttpSession(requestedSessionId);
if (session != null && isValid(session))
{
baseRequest.enterSession(session); //enter session for first time
baseRequest.setSession(session);
}
return;
}
else if (!DispatcherType.REQUEST.equals(baseRequest.getDispatcherType()))
return;
boolean requestedSessionIdFromCookie = false;
HttpSession session = null;
//first try getting id from a cookie
if (isUsingCookies())
{
Cookie[] cookies = request.getCookies();
if (cookies != null && cookies.length > 0)
{
final String sessionCookie = getSessionCookieName(getSessionCookieConfig());
for (Cookie cookie : cookies)
{
if (sessionCookie.equalsIgnoreCase(cookie.getName()))
{
String id = cookie.getValue();
requestedSessionIdFromCookie = true;
if (LOG.isDebugEnabled())
LOG.debug("Got Session ID {} from cookie {}", id, sessionCookie);
if (session == null)
{
//we currently do not have a session selected, use this one if it is valid
HttpSession s = getHttpSession(id);
if (s != null && isValid(s))
{
//associate it with the request so its reference count is decremented as the
//request exits
requestedSessionId = id;
session = s;
baseRequest.enterSession(session);
baseRequest.setSession(session);
if (LOG.isDebugEnabled())
LOG.debug("Selected session {}", session);
}
else
{
if (LOG.isDebugEnabled())
LOG.debug("No session found for session cookie id {}", id);
//if we don't have a valid session id yet, just choose the current id
if (requestedSessionId == null)
requestedSessionId = id;
}
}
else
{
//we currently have a valid session selected. We will throw an error
//if there is a _different_ valid session id cookie. Duplicate ids, or
//invalid session ids are ignored
if (!session.getId().equals(getSessionIdManager().getId(id)))
{
//load the session to see if it is valid or not
HttpSession s = getHttpSession(id);
if (s != null && isValid(s))
{
//associate it with the request so its reference count is decremented as the
//request exits
baseRequest.enterSession(s);
if (LOG.isDebugEnabled())
LOG.debug("Multiple different valid session ids: {}, {}", requestedSessionId, id);
throw new BadMessageException("Duplicate valid session cookies: " + requestedSessionId + " ," + id);
}
}
else
{
if (LOG.isDebugEnabled())
LOG.debug("Duplicate valid session cookie id: {}", id);
}
}
}
}
}
}
//try getting id from a url
if (isUsingURLs() && (requestedSessionId == null))
{
String uri = request.getRequestURI();
String prefix = getSessionIdPathParameterNamePrefix();
if (prefix != null)
{
int s = uri.indexOf(prefix);
if (s >= 0)
{
s += prefix.length();
int i = s;
while (i < uri.length())
{
char c = uri.charAt(i);
if (c == ';' || c == '#' || c == '?' || c == '/')
break;
i++;
}
requestedSessionId = uri.substring(s, i);
requestedSessionIdFromCookie = false;
if (LOG.isDebugEnabled())
LOG.debug("Got Session ID {} from URL", requestedSessionId);
session = getHttpSession(requestedSessionId);
if (session != null && isValid(session))
{
baseRequest.enterSession(session); //request enters this session for first time
baseRequest.setSession(session); //associate the session with the request
}
}
}
}
baseRequest.setRequestedSessionId(requestedSessionId);
baseRequest.setRequestedSessionIdFromCookie(requestedSessionId != null && requestedSessionIdFromCookie);
}
@Override
public String toString()
{
return String.format("%s%d==dftMaxIdleSec=%d", this.getClass().getName(), this.hashCode(), _dftMaxIdleSecs);
}
}