spring security MessageAuthorizationContextSecurityExpressionHandler 源码
spring security MessageAuthorizationContextSecurityExpressionHandler 代码
文件路径：/messaging/src/main/java/org/springframework/security/messaging/access/expression/MessageAuthorizationContextSecurityExpressionHandler.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 java.util.function.Supplier;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.ExpressionParser;
import org.springframework.messaging.Message;
import org.springframework.security.access.expression.SecurityExpressionHandler;
import org.springframework.security.core.Authentication;
import org.springframework.security.messaging.access.intercept.MessageAuthorizationContext;
/**
* An expression handler for {@link MessageAuthorizationContext}.
*
* @author Josh Cummings
* @since 5.8
*/
public final class MessageAuthorizationContextSecurityExpressionHandler
implements SecurityExpressionHandler<MessageAuthorizationContext<?>> {
private final SecurityExpressionHandler<Message<?>> delegate;
@SuppressWarnings("rawtypes")
public MessageAuthorizationContextSecurityExpressionHandler() {
this(new DefaultMessageSecurityExpressionHandler());
}
public MessageAuthorizationContextSecurityExpressionHandler(
SecurityExpressionHandler<Message<?>> expressionHandler) {
this.delegate = expressionHandler;
}
@Override
public ExpressionParser getExpressionParser() {
return this.delegate.getExpressionParser();
}
@Override
public EvaluationContext createEvaluationContext(Authentication authentication,
MessageAuthorizationContext<?> message) {
return createEvaluationContext(() -> authentication, message);
}
@Override
public EvaluationContext createEvaluationContext(Supplier<Authentication> authentication,
MessageAuthorizationContext<?> message) {
EvaluationContext context = this.delegate.createEvaluationContext(authentication, message.getMessage());
Map<String, String> variables = message.getVariables();
if (variables != null) {
for (Map.Entry<String, String> entry : variables.entrySet()) {
context.setVariable(entry.getKey(), entry.getValue());
}
}
return context;
}
}
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