spring security XXssProtectionServerHttpHeadersWriter 源码
spring security XXssProtectionServerHttpHeadersWriter 代码
文件路径：/web/src/main/java/org/springframework/security/web/server/header/XXssProtectionServerHttpHeadersWriter.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 reactor.core.publisher.Mono;
import org.springframework.security.web.server.header.StaticServerHttpHeadersWriter.Builder;
import org.springframework.util.Assert;
import org.springframework.web.server.ServerWebExchange;
/**
* Add the x-xss-protection header.
*
* @author Rob Winch
* @since 5.0
*/
public class XXssProtectionServerHttpHeadersWriter implements ServerHttpHeadersWriter {
public static final String X_XSS_PROTECTION = "X-XSS-Protection";
private boolean enabled;
private boolean block;
private ServerHttpHeadersWriter delegate;
/**
* Creates a new instance
*/
public XXssProtectionServerHttpHeadersWriter() {
this.enabled = true;
this.block = true;
updateDelegate();
}
@Override
public Mono<Void> writeHttpHeaders(ServerWebExchange exchange) {
return this.delegate.writeHttpHeaders(exchange);
}
/**
* If true, will contain a value of 1. For example:
*
* <pre>
* X-XSS-Protection: 1
* </pre>
*
* or if {@link #setBlock(boolean)} is true
*
*
* <pre>
* X-XSS-Protection: 1; mode=block
* </pre>
*
* If false, will explicitly disable specify that X-XSS-Protection is disabled. For
* example:
*
* <pre>
* X-XSS-Protection: 0
* </pre>
* @param enabled the new value
*/
public void setEnabled(boolean enabled) {
if (!enabled) {
setBlock(false);
}
this.enabled = enabled;
updateDelegate();
}
/**
* If false, will not specify the mode as blocked. In this instance, any content will
* be attempted to be fixed. If true, the content will be replaced with "#".
* @param block the new value
*/
public void setBlock(boolean block) {
Assert.isTrue(this.enabled || !block, "Cannot set block to true with enabled false");
this.block = block;
updateDelegate();
}
private void updateDelegate() {
Builder builder = StaticServerHttpHeadersWriter.builder();
builder.header(X_XSS_PROTECTION, createHeaderValue());
this.delegate = builder.build();
}
private String createHeaderValue() {
if (!this.enabled) {
return "0";
}
if (!this.block) {
return "1";
}
return "1 ; mode=block";
}
}
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