org.springframework.security.access.expression.method.ExpressionBasedPostInvocationAdvice Maven / Gradle / Ivy
/*
* Copyright 2002-2016 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.access.expression.method;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.core.log.LogMessage;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.Expression;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.expression.ExpressionUtils;
import org.springframework.security.access.prepost.PostInvocationAttribute;
import org.springframework.security.access.prepost.PostInvocationAuthorizationAdvice;
import org.springframework.security.core.Authentication;
/**
* @author Luke Taylor
* @since 3.0
*/
public class ExpressionBasedPostInvocationAdvice implements PostInvocationAuthorizationAdvice {
protected final Log logger = LogFactory.getLog(getClass());
private final MethodSecurityExpressionHandler expressionHandler;
public ExpressionBasedPostInvocationAdvice(MethodSecurityExpressionHandler expressionHandler) {
this.expressionHandler = expressionHandler;
}
@Override
public Object after(Authentication authentication, MethodInvocation mi, PostInvocationAttribute postAttr,
Object returnedObject) throws AccessDeniedException {
PostInvocationExpressionAttribute pia = (PostInvocationExpressionAttribute) postAttr;
EvaluationContext ctx = this.expressionHandler.createEvaluationContext(authentication, mi);
Expression postFilter = pia.getFilterExpression();
Expression postAuthorize = pia.getAuthorizeExpression();
if (postFilter != null) {
this.logger.debug(LogMessage.format("Applying PostFilter expression %s", postFilter));
if (returnedObject != null) {
returnedObject = this.expressionHandler.filter(returnedObject, postFilter, ctx);
}
else {
this.logger.debug("Return object is null, filtering will be skipped");
}
}
this.expressionHandler.setReturnObject(returnedObject, ctx);
if (postAuthorize != null && !ExpressionUtils.evaluateAsBoolean(postAuthorize, ctx)) {
this.logger.debug("PostAuthorize expression rejected access");
throw new AccessDeniedException("Access is denied");
}
return returnedObject;
}
}