org.springframework.security.web.server.header.CrossOriginResourcePolicyServerHttpHeadersWriter Maven / Gradle / Ivy
/*
* 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.server.header;
import reactor.core.publisher.Mono;
import org.springframework.util.Assert;
import org.springframework.web.server.ServerWebExchange;
/**
* Inserts Cross-Origin-Resource-Policy headers.
*
* @author Marcus Da Coregio
* @since 5.7
* @see
* Cross-Origin-Resource-Policy
*/
public final class CrossOriginResourcePolicyServerHttpHeadersWriter implements ServerHttpHeadersWriter {
public static final String RESOURCE_POLICY = "Cross-Origin-Resource-Policy";
private ServerHttpHeadersWriter delegate;
/**
* Sets the {@link CrossOriginResourcePolicy} value to be used in the
* {@code Cross-Origin-Embedder-Policy} header
* @param resourcePolicy the {@link CrossOriginResourcePolicy} to use
*/
public void setPolicy(CrossOriginResourcePolicy resourcePolicy) {
Assert.notNull(resourcePolicy, "resourcePolicy cannot be null");
this.delegate = createDelegate(resourcePolicy);
}
@Override
public Mono writeHttpHeaders(ServerWebExchange exchange) {
return (this.delegate != null) ? this.delegate.writeHttpHeaders(exchange) : Mono.empty();
}
private static ServerHttpHeadersWriter createDelegate(CrossOriginResourcePolicy resourcePolicy) {
StaticServerHttpHeadersWriter.Builder builder = StaticServerHttpHeadersWriter.builder();
builder.header(RESOURCE_POLICY, resourcePolicy.getPolicy());
return builder.build();
}
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;
}
}
}