spring security MessageExpressionConfigAttribute 源码
spring security MessageExpressionConfigAttribute 代码
文件路径：/messaging/src/main/java/org/springframework/security/messaging/access/expression/MessageExpressionConfigAttribute.java
/*
* Copyright 2002-2022 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.messaging.access.expression;
import java.util.Map;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.Expression;
import org.springframework.messaging.Message;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.messaging.util.matcher.MessageMatcher;
import org.springframework.security.messaging.util.matcher.SimpDestinationMessageMatcher;
import org.springframework.util.Assert;
/**
* Simple expression configuration attribute for use in {@link Message} authorizations.
*
* @author Rob Winch
* @author Daniel Bustamante Ospina
* @since 4.0
* @deprecated Use
* {@link org.springframework.security.messaging.access.intercept.MessageMatcherDelegatingAuthorizationManager}
* instead
*/
@Deprecated
@SuppressWarnings("serial")
class MessageExpressionConfigAttribute implements ConfigAttribute, EvaluationContextPostProcessor<Message<?>> {
private final Expression authorizeExpression;
private final MessageMatcher<?> matcher;
/**
* Creates a new instance
* @param authorizeExpression the {@link Expression} to use. Cannot be null
* @param matcher the {@link MessageMatcher} used to match the messages.
*/
MessageExpressionConfigAttribute(Expression authorizeExpression, MessageMatcher<?> matcher) {
Assert.notNull(authorizeExpression, "authorizeExpression cannot be null");
Assert.notNull(matcher, "matcher cannot be null");
this.authorizeExpression = authorizeExpression;
this.matcher = matcher;
}
Expression getAuthorizeExpression() {
return this.authorizeExpression;
}
@Override
public String getAttribute() {
return null;
}
@Override
public String toString() {
return this.authorizeExpression.getExpressionString();
}
@Override
public EvaluationContext postProcess(EvaluationContext ctx, Message<?> message) {
if (this.matcher instanceof SimpDestinationMessageMatcher) {
Map<String, String> variables = ((SimpDestinationMessageMatcher) this.matcher)
.extractPathVariables(message);
for (Map.Entry<String, String> entry : variables.entrySet()) {
ctx.setVariable(entry.getKey(), entry.getValue());
}
}
return ctx;
}
}
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