Support cachecontrol config property in WebFlux

Closes gh-14724

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/WebFluxAutoConfiguration.java

@@ -18,7 +18,6 @@ package org.springframework.boot.autoconfigure.web.reactive;
 
 import java.time.Duration;
 import java.util.Collection;
-import java.util.concurrent.TimeUnit;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
@@ -50,7 +49,6 @@ import org.springframework.core.convert.converter.GenericConverter;
 import org.springframework.format.Formatter;
 import org.springframework.format.FormatterRegistry;
 import org.springframework.format.support.FormattingConversionService;
-import org.springframework.http.CacheControl;
 import org.springframework.http.codec.ServerCodecConfigurer;
 import org.springframework.util.ClassUtils;
 import org.springframework.validation.Validator;
@@ -151,14 +149,16 @@ public class WebFluxAutoConfiguration {
 				return;
 			}
 			Duration cachePeriod = this.resourceProperties.getCache().getPeriod();
+			ResourceProperties.Cache.Cachecontrol cacheControl = this.resourceProperties
+					.getCache().getCachecontrol();
 			if (!registry.hasMappingForPattern("/webjars/**")) {
 				ResourceHandlerRegistration registration = registry
 						.addResourceHandler("/webjars/**")
 						.addResourceLocations("classpath:/META-INF/resources/webjars/");
-				if (cachePeriod != null) {
-					registration.setCacheControl(CacheControl
-							.maxAge(cachePeriod.toMillis(), TimeUnit.MILLISECONDS));
+				if (cachePeriod != null && cacheControl.getMaxAge() == null) {
+					cacheControl.setMaxAge(cachePeriod);
 				}
+				registration.setCacheControl(cacheControl.toHttpCacheControl());
 				customizeResourceHandlerRegistration(registration);
 			}
 			String staticPathPattern = this.webFluxProperties.getStaticPathPattern();
@@ -166,10 +166,10 @@ public class WebFluxAutoConfiguration {
 				ResourceHandlerRegistration registration = registry
 						.addResourceHandler(staticPathPattern).addResourceLocations(
 								this.resourceProperties.getStaticLocations());
-				if (cachePeriod != null) {
-					registration.setCacheControl(CacheControl
-							.maxAge(cachePeriod.toMillis(), TimeUnit.MILLISECONDS));
+				if (cachePeriod != null && cacheControl.getMaxAge() == null) {
+					cacheControl.setMaxAge(cachePeriod);
 				}
+				registration.setCacheControl(cacheControl.toHttpCacheControl());
 				customizeResourceHandlerRegistration(registration);
 			}
 		}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/WebFluxAutoConfigurationTests.java

@@ -16,8 +16,11 @@
 
 package org.springframework.boot.autoconfigure.web.reactive;
 
+import java.util.Collections;
 import java.util.Date;
 import java.util.List;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
 
 import javax.validation.ValidatorFactory;
 
@@ -28,6 +31,7 @@ import org.springframework.beans.DirectFieldAccessor;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration;
 import org.springframework.boot.autoconfigure.validation.ValidatorAdapter;
+import org.springframework.boot.test.context.assertj.AssertableReactiveWebApplicationContext;
 import org.springframework.boot.test.context.runner.ReactiveWebApplicationContextRunner;
 import org.springframework.boot.web.codec.CodecCustomizer;
 import org.springframework.boot.web.reactive.filter.OrderedHiddenHttpMethodFilter;
@@ -38,6 +42,7 @@ import org.springframework.core.Ordered;
 import org.springframework.core.annotation.Order;
 import org.springframework.core.io.ClassPathResource;
 import org.springframework.format.support.FormattingConversionService;
+import org.springframework.http.CacheControl;
 import org.springframework.http.codec.ServerCodecConfigurer;
 import org.springframework.http.server.reactive.HttpHandler;
 import org.springframework.test.util.ReflectionTestUtils;
@@ -58,6 +63,7 @@ import org.springframework.web.reactive.result.method.annotation.RequestMappingH
 import org.springframework.web.reactive.result.method.annotation.RequestMappingHandlerMapping;
 import org.springframework.web.reactive.result.view.ViewResolutionResultHandler;
 import org.springframework.web.reactive.result.view.ViewResolver;
+import org.springframework.web.util.pattern.PathPattern;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.ArgumentMatchers.any;
@@ -406,6 +412,53 @@ public class WebFluxAutoConfigurationTests {
 				});
 	}
 
+	@Test
+	public void cachePeriod() {
+		this.contextRunner.withPropertyValues("spring.resources.cache.period:5")
+				.run(this::assertCachePeriod);
+	}
+
+	@Test
+	public void cacheControl() {
+		this.contextRunner
+				.withPropertyValues("spring.resources.cache.cachecontrol.max-age:5",
+						"spring.resources.cache.cachecontrol.proxy-revalidate:true")
+				.run(this::assertCacheControl);
+	}
+
+	private void assertCachePeriod(AssertableReactiveWebApplicationContext context) {
+		Map<PathPattern, Object> handlerMap = getHandlerMap(
+				context.getBean("resourceHandlerMapping", HandlerMapping.class));
+		assertThat(handlerMap).hasSize(2);
+		for (Object handler : handlerMap.values()) {
+			if (handler instanceof ResourceWebHandler) {
+				assertThat(((ResourceWebHandler) handler).getCacheControl())
+						.isEqualToComparingFieldByField(
+								CacheControl.maxAge(5, TimeUnit.SECONDS));
+			}
+		}
+	}
+
+	private Map<PathPattern, Object> getHandlerMap(HandlerMapping mapping) {
+		if (mapping instanceof SimpleUrlHandlerMapping) {
+			return ((SimpleUrlHandlerMapping) mapping).getHandlerMap();
+		}
+		return Collections.emptyMap();
+	}
+
+	private void assertCacheControl(AssertableReactiveWebApplicationContext context) {
+		Map<PathPattern, Object> handlerMap = getHandlerMap(
+				context.getBean("resourceHandlerMapping", HandlerMapping.class));
+		assertThat(handlerMap).hasSize(2);
+		for (Object handler : handlerMap.values()) {
+			if (handler instanceof ResourceWebHandler) {
+				assertThat(((ResourceWebHandler) handler).getCacheControl())
+						.isEqualToComparingFieldByField(CacheControl
+								.maxAge(5, TimeUnit.SECONDS).proxyRevalidate());
+			}
+		}
+	}
+
 	@Configuration
 	protected static class CustomArgumentResolvers {