spring security CrossOriginResourcePolicyHeaderWriter 源码
spring security CrossOriginResourcePolicyHeaderWriter 代码
文件路径：/web/src/main/java/org/springframework/security/web/header/writers/CrossOriginResourcePolicyHeaderWriter.java
/*
* Copyright 2002-2021 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.header.writers;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.security.web.header.HeaderWriter;
import org.springframework.util.Assert;
/**
* Inserts Cross-Origin-Resource-Policy header
*
* @author Marcus Da Coregio
* @since 5.7
* @see <a href=
* "https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cross-Origin-Resource-Policy">
* Cross-Origin-Resource-Policy</a>
*/
public final class CrossOriginResourcePolicyHeaderWriter implements HeaderWriter {
private static final String RESOURCE_POLICY = "Cross-Origin-Resource-Policy";
private CrossOriginResourcePolicy policy;
/**
* Sets the {@link CrossOriginResourcePolicy} value to be used in the
* {@code Cross-Origin-Resource-Policy} header
* @param resourcePolicy the {@link CrossOriginResourcePolicy} to use
*/
public void setPolicy(CrossOriginResourcePolicy resourcePolicy) {
Assert.notNull(resourcePolicy, "resourcePolicy cannot be null");
this.policy = resourcePolicy;
}
@Override
public void writeHeaders(HttpServletRequest request, HttpServletResponse response) {
if (this.policy != null && !response.containsHeader(RESOURCE_POLICY)) {
response.addHeader(RESOURCE_POLICY, this.policy.getPolicy());
}
}
public enum CrossOriginResourcePolicy {
SAME_SITE("same-site"),
SAME_ORIGIN("same-origin"),
CROSS_ORIGIN("cross-origin");
private final String policy;
CrossOriginResourcePolicy(String policy) {
this.policy = policy;
}
public String getPolicy() {
return this.policy;
}
public static CrossOriginResourcePolicy from(String resourcePolicy) {
for (CrossOriginResourcePolicy policy : values()) {
if (policy.getPolicy().equals(resourcePolicy)) {
return policy;
}
}
return null;
}
}
}
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