spring security ReferrerPolicyServerHttpHeadersWriter 源码
spring security ReferrerPolicyServerHttpHeadersWriter 代码
文件路径：/web/src/main/java/org/springframework/security/web/server/header/ReferrerPolicyServerHttpHeadersWriter.java
/*
* Copyright 2002-2018 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 java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import reactor.core.publisher.Mono;
import org.springframework.security.web.server.header.StaticServerHttpHeadersWriter.Builder;
import org.springframework.util.Assert;
import org.springframework.web.server.ServerWebExchange;
/**
* Writes the {@code Referrer-Policy} response header.
*
* @author Vedran Pavic
* @since 5.1
*/
public final class ReferrerPolicyServerHttpHeadersWriter implements ServerHttpHeadersWriter {
public static final String REFERRER_POLICY = "Referrer-Policy";
private ServerHttpHeadersWriter delegate;
public ReferrerPolicyServerHttpHeadersWriter() {
this.delegate = createDelegate(ReferrerPolicy.NO_REFERRER);
}
@Override
public Mono<Void> writeHttpHeaders(ServerWebExchange exchange) {
return this.delegate.writeHttpHeaders(exchange);
}
/**
* Set the policy to be used in the response header.
* @param policy the policy
* @throws IllegalArgumentException if policy is {@code null}
*/
public void setPolicy(ReferrerPolicy policy) {
Assert.notNull(policy, "policy must not be null");
this.delegate = createDelegate(policy);
}
private static ServerHttpHeadersWriter createDelegate(ReferrerPolicy policy) {
Builder builder = StaticServerHttpHeadersWriter.builder();
builder.header(REFERRER_POLICY, policy.getPolicy());
return builder.build();
}
public enum ReferrerPolicy {
NO_REFERRER("no-referrer"),
NO_REFERRER_WHEN_DOWNGRADE("no-referrer-when-downgrade"),
SAME_ORIGIN("same-origin"),
ORIGIN("origin"),
STRICT_ORIGIN("strict-origin"),
ORIGIN_WHEN_CROSS_ORIGIN("origin-when-cross-origin"),
STRICT_ORIGIN_WHEN_CROSS_ORIGIN("strict-origin-when-cross-origin"),
UNSAFE_URL("unsafe-url");
private static final Map<String, ReferrerPolicy> REFERRER_POLICIES;
static {
Map<String, ReferrerPolicy> referrerPolicies = new HashMap<>();
for (ReferrerPolicy referrerPolicy : values()) {
referrerPolicies.put(referrerPolicy.getPolicy(), referrerPolicy);
}
REFERRER_POLICIES = Collections.unmodifiableMap(referrerPolicies);
}
private final String policy;
ReferrerPolicy(String policy) {
this.policy = policy;
}
public String getPolicy() {
return this.policy;
}
}
}
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