spring-security/samples/boot/webflux-form/src/main/java/sample/CsrfControllerAdvice.java

/*
 * Copyright 2002-2017 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
 *
 *      http://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 sample;

import org.springframework.security.web.server.csrf.CsrfToken;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import static org.springframework.security.web.reactive.result.view.CsrfRequestDataValueProcessor.DEFAULT_CSRF_ATTR_NAME;

/**
 * @author Rob Winch
 * @since 5.0
 */
@ControllerAdvice
public class CsrfControllerAdvice {
	@ModelAttribute
	public Mono<CsrfToken> csrfToken(ServerWebExchange exchange) {
		Mono<CsrfToken> csrfToken = exchange.getAttribute(CsrfToken.class.getName());
		return csrfToken.doOnSuccess(token -> exchange.getAttributes().put(DEFAULT_CSRF_ATTR_NAME, token));
	}
}