Make sure cache busting works with error pages

See gh-14583

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/thymeleaf/ThymeleafAutoConfiguration.java

@@ -21,6 +21,7 @@ import java.util.Collections;
 import java.util.LinkedHashMap;
 
 import javax.annotation.PostConstruct;
+import javax.servlet.DispatcherType;
 
 import com.github.mxab.thymeleaf.extras.dataattribute.dialect.DataAttributeDialect;
 import nz.net.ultraq.thymeleaf.LayoutDialect;
@@ -53,6 +54,7 @@ import org.springframework.boot.autoconfigure.web.reactive.WebFluxAutoConfigurat
 import org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.context.properties.PropertyMapper;
+import org.springframework.boot.web.servlet.FilterRegistrationBean;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -70,6 +72,7 @@ import org.springframework.web.servlet.resource.ResourceUrlEncodingFilter;
  * @author Eddú Meléndez
  * @author Daniel Fernández
  * @author Kazuki Shimizu
+ * @author Artsiom Yudovin
  */
 @Configuration
 @EnableConfigurationProperties(ThymeleafProperties.class)
@@ -166,8 +169,12 @@ public class ThymeleafAutoConfiguration {
 		@Bean
 		@ConditionalOnMissingBean
 		@ConditionalOnEnabledResourceChain
-		public ResourceUrlEncodingFilter resourceUrlEncodingFilter() {
+		public FilterRegistrationBean resourceUrlEncodingFilter() {
-			return new ResourceUrlEncodingFilter();
+			FilterRegistrationBean<ResourceUrlEncodingFilter> filterRegistrationBean = new FilterRegistrationBean<>(
+					new ResourceUrlEncodingFilter());
+			filterRegistrationBean.setDispatcherTypes(DispatcherType.REQUEST,
+					DispatcherType.ERROR);
+			return filterRegistrationBean;
 		}
 
 		@Configuration

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/thymeleaf/ThymeleafServletAutoConfigurationTests.java

@@ -18,8 +18,11 @@ package org.springframework.boot.autoconfigure.thymeleaf;
 
 import java.io.File;
 import java.util.Collections;
+import java.util.EnumSet;
 import java.util.Locale;
 
+import javax.servlet.DispatcherType;
+
 import nz.net.ultraq.thymeleaf.LayoutDialect;
 import nz.net.ultraq.thymeleaf.decorators.strategies.GroupingStrategy;
 import org.junit.After;
@@ -37,6 +40,7 @@ import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
 import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration;
 import org.springframework.boot.test.rule.OutputCapture;
 import org.springframework.boot.test.util.TestPropertyValues;
+import org.springframework.boot.web.servlet.FilterRegistrationBean;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -47,7 +51,6 @@ import org.springframework.mock.web.MockServletContext;
 import org.springframework.test.util.ReflectionTestUtils;
 import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
 import org.springframework.web.servlet.ViewResolver;
-import org.springframework.web.servlet.resource.ResourceUrlEncodingFilter;
 import org.springframework.web.servlet.support.RequestContext;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -61,6 +64,7 @@ import static org.hamcrest.Matchers.containsString;
  * @author Eddú Meléndez
  * @author Brian Clozel
  * @author Kazuki Shimizu
+ * @author Artsiom Yudovin
  */
 public class ThymeleafServletAutoConfigurationTests {
 
@@ -205,14 +209,17 @@ public class ThymeleafServletAutoConfigurationTests {
 	@Test
 	public void registerResourceHandlingFilterDisabledByDefault() {
 		load(BaseConfiguration.class);
-		assertThat(this.context.getBeansOfType(ResourceUrlEncodingFilter.class))
+		assertThat(this.context.getBeansOfType(FilterRegistrationBean.class)).isEmpty();
-				.isEmpty();
 	}
 
 	@Test
 	public void registerResourceHandlingFilterOnlyIfResourceChainIsEnabled() {
 		load(BaseConfiguration.class, "spring.resources.chain.enabled:true");
-		assertThat(this.context.getBean(ResourceUrlEncodingFilter.class)).isNotNull();
+		FilterRegistrationBean<?> registration = this.context
+				.getBean(FilterRegistrationBean.class);
+		assertThat(registration).isNotNull();
+		assertThat(registration).hasFieldOrPropertyWithValue("dispatcherTypes",
+				EnumSet.of(DispatcherType.REQUEST, DispatcherType.ERROR));
 	}
 
 	@Test