org.springframework.security.web.server.authentication.InvalidateLeastUsedServerMaximumSessionsExceededHandler Maven / Gradle / Ivy
/*
* Copyright 2002-2024 the original author or authors.
*
* 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
*
* https://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.server.authentication;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import org.springframework.security.core.session.ReactiveSessionInformation;
import org.springframework.util.Assert;
import org.springframework.web.server.session.WebSessionStore;
/**
* Implementation of {@link ServerMaximumSessionsExceededHandler} that invalidates the
* least recently used {@link ReactiveSessionInformation} and removes the related sessions
* from the {@link WebSessionStore}. It only invalidates the amount of sessions that
* exceed the maximum allowed. For example, if the maximum was exceeded by 1, only the
* least recently used session will be invalidated.
*
* @author Marcus da Coregio
* @since 6.3
*/
public final class InvalidateLeastUsedServerMaximumSessionsExceededHandler
implements ServerMaximumSessionsExceededHandler {
private final WebSessionStore webSessionStore;
public InvalidateLeastUsedServerMaximumSessionsExceededHandler(WebSessionStore webSessionStore) {
Assert.notNull(webSessionStore, "webSessionStore cannot be null");
this.webSessionStore = webSessionStore;
}
@Override
public Mono handle(MaximumSessionsContext context) {
List sessions = new ArrayList<>(context.getSessions());
sessions.removeIf((session) -> session.getSessionId().equals(context.getCurrentSession().getId()));
sessions.sort(Comparator.comparing(ReactiveSessionInformation::getLastAccessTime));
int maximumSessionsExceededBy = sessions.size() - context.getMaximumSessionsAllowed() + 1;
List leastRecentlyUsedSessionsToInvalidate = sessions.subList(0,
maximumSessionsExceededBy);
return Flux.fromIterable(leastRecentlyUsedSessionsToInvalidate)
.flatMap((toInvalidate) -> toInvalidate.invalidate().thenReturn(toInvalidate))
.flatMap((toInvalidate) -> this.webSessionStore.removeSession(toInvalidate.getSessionId()))
.then();
}
}