spring security ELRequestMatcher 源码
spring security ELRequestMatcher 代码
文件路径：/web/src/main/java/org/springframework/security/web/util/matcher/ELRequestMatcher.java
/*
* Copyright 2010-2016 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.web.util.matcher;
import jakarta.servlet.http.HttpServletRequest;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.Expression;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.expression.spel.support.StandardEvaluationContext;
import org.springframework.security.web.authentication.DelegatingAuthenticationEntryPoint;
/**
* A RequestMatcher implementation which uses a SpEL expression
*
* <p>
* With the default EvaluationContext ({@link ELRequestMatcherContext}) you can use
* <code>hasIpAddress()</code> and <code>hasHeader()</code>
* </p>
*
* <p>
* See {@link DelegatingAuthenticationEntryPoint} for an example configuration.
* </p>
*
* @author Mike Wiesner
* @since 3.0.2
*/
public class ELRequestMatcher implements RequestMatcher {
private final Expression expression;
public ELRequestMatcher(String el) {
SpelExpressionParser parser = new SpelExpressionParser();
this.expression = parser.parseExpression(el);
}
@Override
public boolean matches(HttpServletRequest request) {
EvaluationContext context = createELContext(request);
return this.expression.getValue(context, Boolean.class);
}
/**
* Subclasses can override this methode if they want to use a different EL root
* context
* @return EL root context which is used to evaluate the expression
*/
public EvaluationContext createELContext(HttpServletRequest request) {
return new StandardEvaluationContext(new ELRequestMatcherContext(request));
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("EL [el=\"").append(this.expression.getExpressionString()).append("\"");
sb.append("]");
return sb.toString();
}
}
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