Align max HTTP header size configuration

See gh-14234

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

@@ -53,6 +53,7 @@ import org.springframework.util.unit.DataSize;
  * @author Aurélien Leboulanger
  * @author Brian Clozel
  * @author Olivier Lamy
+ * @author Chentao Qu
  */
 @ConfigurationProperties(prefix = "server", ignoreUnknownFields = true)
 public class ServerProperties {
@@ -81,9 +82,9 @@ public class ServerProperties {
 	private String serverHeader;
 
 	/**
-	 * Maximum size, in bytes, of the HTTP message header.
+	 * Maximum size of the HTTP message header.
 	 */
-	private int maxHttpHeaderSize = 0; // bytes
+	private DataSize maxHttpHeaderSize = DataSize.ofKiloBytes(8L);
 
 	/**
 	 * Time that connectors wait for another HTTP request before closing the connection.
@@ -141,11 +142,11 @@ public class ServerProperties {
 		this.serverHeader = serverHeader;
 	}
 
-	public int getMaxHttpHeaderSize() {
+	public DataSize getMaxHttpHeaderSize() {
 		return this.maxHttpHeaderSize;
 	}
 
-	public void setMaxHttpHeaderSize(int maxHttpHeaderSize) {
+	public void setMaxHttpHeaderSize(DataSize maxHttpHeaderSize) {
 		this.maxHttpHeaderSize = maxHttpHeaderSize;
 	}
 
@@ -327,7 +328,9 @@ public class ServerProperties {
 
 		/**
 		 * Maximum size, in bytes, of the HTTP message header.
+		 * @deprecated since 2.1.0 in favor of {@link ServerProperties#maxHttpHeaderSize}
 		 */
+		@Deprecated
 		private int maxHttpHeaderSize = 0;
 
 		/**

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/embedded/JettyWebServerFactoryCustomizer.java

@@ -36,6 +36,7 @@ import org.springframework.boot.web.embedded.jetty.JettyServerCustomizer;
 import org.springframework.boot.web.server.WebServerFactoryCustomizer;
 import org.springframework.core.Ordered;
 import org.springframework.core.env.Environment;
+import org.springframework.util.unit.DataSize;
 
 /**
  * Customization for Jetty-specific features common for both Servlet and Reactive servers.
@@ -73,7 +74,8 @@ public class JettyWebServerFactoryCustomizer implements
 				.to(factory::setAcceptors);
 		propertyMapper.from(jettyProperties::getSelectors).whenNonNull()
 				.to(factory::setSelectors);
-		propertyMapper.from(properties::getMaxHttpHeaderSize).when(this::isPositive)
+		propertyMapper.from(properties::getMaxHttpHeaderSize).whenNonNull()
+				.asInt(DataSize::toBytes)
 				.to((maxHttpHeaderSize) -> customizeMaxHttpHeaderSize(factory,
 						maxHttpHeaderSize));
 		propertyMapper.from(jettyProperties::getMaxHttpPostSize).when(this::isPositive)
@@ -133,7 +135,6 @@ public class JettyWebServerFactoryCustomizer implements
 			private void customize(HttpConfiguration.ConnectionFactory factory) {
 				HttpConfiguration configuration = factory.getHttpConfiguration();
 				configuration.setRequestHeaderSize(maxHttpHeaderSize);
-				configuration.setResponseHeaderSize(maxHttpHeaderSize);
 			}
 
 		});

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/embedded/NettyWebServerFactoryCustomizer.java

@@ -18,15 +18,19 @@ package org.springframework.boot.autoconfigure.web.embedded;
 
 import org.springframework.boot.autoconfigure.web.ServerProperties;
 import org.springframework.boot.cloud.CloudPlatform;
+import org.springframework.boot.context.properties.PropertyMapper;
 import org.springframework.boot.web.embedded.netty.NettyReactiveWebServerFactory;
+import org.springframework.boot.web.embedded.netty.NettyServerCustomizer;
 import org.springframework.boot.web.server.WebServerFactoryCustomizer;
 import org.springframework.core.Ordered;
 import org.springframework.core.env.Environment;
+import org.springframework.util.unit.DataSize;
 
 /**
  * Customization for Netty-specific features.
  *
  * @author Brian Clozel
+ * @author Chentao Qu
  * @since 2.1.0
  */
 public class NettyWebServerFactoryCustomizer
@@ -51,6 +55,11 @@ public class NettyWebServerFactoryCustomizer
 	public void customize(NettyReactiveWebServerFactory factory) {
 		factory.setUseForwardHeaders(
 				getOrDeduceUseForwardHeaders(this.serverProperties, this.environment));
+		PropertyMapper propertyMapper = PropertyMapper.get();
+		propertyMapper.from(this.serverProperties::getMaxHttpHeaderSize).whenNonNull()
+				.asInt(DataSize::toBytes)
+				.to((maxHttpRequestHeaderSize) -> customizeMaxHttpHeaderSize(factory,
+						maxHttpRequestHeaderSize));
 	}
 
 	private boolean getOrDeduceUseForwardHeaders(ServerProperties serverProperties,
@@ -62,4 +71,11 @@ public class NettyWebServerFactoryCustomizer
 		return platform != null && platform.isUsingForwardHeaders();
 	}
 
+	private void customizeMaxHttpHeaderSize(NettyReactiveWebServerFactory factory,
+			Integer maxHttpHeaderSize) {
+		factory.addServerCustomizers((NettyServerCustomizer) (httpServer) -> httpServer
+				.httpRequestDecoder((httpRequestDecoderSpec) -> httpRequestDecoderSpec
+						.maxHeaderSize(maxHttpHeaderSize)));
+	}
+
 }

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/embedded/TomcatWebServerFactoryCustomizer.java

@@ -48,6 +48,7 @@ import org.springframework.util.unit.DataSize;
  * @author Stephane Nicoll
  * @author Phillip Webb
  * @author Artsiom Yudovin
+ * @author Chentao Qu
  * @since 2.0.0
  */
 public class TomcatWebServerFactoryCustomizer implements
@@ -84,7 +85,8 @@ public class TomcatWebServerFactoryCustomizer implements
 						tomcatProperties.getMaxThreads()));
 		propertyMapper.from(tomcatProperties::getMinSpareThreads).when(this::isPositive)
 				.to((minSpareThreads) -> customizeMinThreads(factory, minSpareThreads));
-		propertyMapper.from(this::determineMaxHttpHeaderSize).when(this::isPositive)
+		propertyMapper.from(this::determineMaxHttpHeaderSize).whenNonNull()
+				.asInt(DataSize::toBytes)
 				.to((maxHttpHeaderSize) -> customizeMaxHttpHeaderSize(factory,
 						maxHttpHeaderSize));
 		propertyMapper.from(tomcatProperties::getMaxSwallowSize).whenNonNull()
@@ -114,10 +116,11 @@ public class TomcatWebServerFactoryCustomizer implements
 		return value > 0;
 	}
 
-	private int determineMaxHttpHeaderSize() {
-		return (this.serverProperties.getMaxHttpHeaderSize() > 0)
-				? this.serverProperties.getMaxHttpHeaderSize()
-				: this.serverProperties.getTomcat().getMaxHttpHeaderSize();
+	private DataSize determineMaxHttpHeaderSize() {
+		return isPositive(this.serverProperties.getTomcat().getMaxHttpHeaderSize())
+				? DataSize
+						.ofBytes(this.serverProperties.getTomcat().getMaxHttpHeaderSize())
+				: this.serverProperties.getMaxHttpHeaderSize();
 	}
 
 	private void customizeAcceptCount(ConfigurableTomcatWebServerFactory factory,

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/embedded/UndertowWebServerFactoryCustomizer.java

@@ -27,6 +27,7 @@ import org.springframework.boot.web.embedded.undertow.ConfigurableUndertowWebSer
 import org.springframework.boot.web.server.WebServerFactoryCustomizer;
 import org.springframework.core.Ordered;
 import org.springframework.core.env.Environment;
+import org.springframework.util.unit.DataSize;
 
 /**
  * Customization for Undertow-specific features common for both Servlet and Reactive
@@ -83,7 +84,8 @@ public class UndertowWebServerFactoryCustomizer implements
 				.to(factory::setAccessLogRotate);
 		propertyMapper.from(this::getOrDeduceUseForwardHeaders)
 				.to(factory::setUseForwardHeaders);
-		propertyMapper.from(properties::getMaxHttpHeaderSize).when(this::isPositive)
+		propertyMapper.from(properties::getMaxHttpHeaderSize).whenNonNull()
+				.asInt(DataSize::toBytes)
 				.to((maxHttpHeaderSize) -> customizeMaxHttpHeaderSize(factory,
 						maxHttpHeaderSize));
 		propertyMapper.from(undertowProperties::getMaxHttpPostSize).when(this::isPositive)

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

@@ -29,6 +29,7 @@ import org.springframework.boot.context.properties.bind.Bindable;
 import org.springframework.boot.context.properties.bind.Binder;
 import org.springframework.boot.context.properties.source.ConfigurationPropertySource;
 import org.springframework.boot.context.properties.source.MapConfigurationPropertySource;
+import org.springframework.util.unit.DataSize;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -136,7 +137,8 @@ public class ServerPropertiesTests {
 	@Test
 	public void testCustomizeHeaderSize() {
 		bind("server.max-http-header-size", "9999");
-		assertThat(this.properties.getMaxHttpHeaderSize()).isEqualTo(9999);
+		assertThat(this.properties.getMaxHttpHeaderSize())
+				.isEqualTo(DataSize.ofBytes(9999));
 	}
 
 	@Test

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/embedded/JettyWebServerFactoryCustomizerTests.java

@@ -21,6 +21,9 @@ import java.io.IOException;
 import java.util.Locale;
 import java.util.TimeZone;
 
+import org.eclipse.jetty.server.Connector;
+import org.eclipse.jetty.server.HttpConfiguration;
+import org.eclipse.jetty.server.HttpConfiguration.ConnectionFactory;
 import org.eclipse.jetty.server.NCSARequestLog;
 import org.eclipse.jetty.server.RequestLog;
 import org.junit.Before;
@@ -140,6 +143,21 @@ public class JettyWebServerFactoryCustomizerTests {
 		verify(factory).setUseForwardHeaders(true);
 	}
 
+	@Test
+	public void customizeMaxHttpHeaderSize() {
+		bind("server.max-http-header-size=2048");
+		JettyWebServer server = customizeAndGetServer();
+		for (Connector connector : server.getServer().getConnectors()) {
+			connector.getConnectionFactories().stream()
+					.filter((factory) -> factory instanceof ConnectionFactory)
+					.forEach((cf) -> {
+						ConnectionFactory factory = (ConnectionFactory) cf;
+						HttpConfiguration configuration = factory.getHttpConfiguration();
+						assertThat(configuration.getRequestHeaderSize()).isEqualTo(2048);
+					});
+		}
+	}
+
 	private void bind(String... inlinedProperties) {
 		TestPropertySourceUtils.addInlinedPropertiesToEnvironment(this.environment,
 				inlinedProperties);

spring-boot-project/spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -207,7 +207,7 @@ content into your application. Rather, pick only the properties that you need.
 	server.jetty.accesslog.time-zone=GMT # Timezone of the request log.
 	server.jetty.max-http-post-size=0 # Maximum size, in bytes, of the HTTP post or put content.
 	server.jetty.selectors= # Number of selector threads to use.
-	server.max-http-header-size=0 # Maximum size, in bytes, of the HTTP message header.
+	server.max-http-header-size=8KB # Maximum size of the HTTP message header.
 	server.port=8080 # Server HTTP port.
 	server.server-header= # Value to use for the Server response header (if empty, no header is sent).
 	server.use-forward-headers= # Whether X-Forwarded-* headers should be applied to the HttpRequest.
@@ -265,7 +265,7 @@ content into your application. Rather, pick only the properties that you need.
 			172\\.2[0-9]{1}\\.\\d{1,3}\\.\\d{1,3}|\\
 			172\\.3[0-1]{1}\\.\\d{1,3}\\.\\d{1,3} # Regular expression matching trusted IP addresses.
 	server.tomcat.max-connections=0 # Maximum number of connections that the server accepts and processes at any given time.
-	server.tomcat.max-http-header-size=0 # Maximum size, in bytes, of the HTTP message header.
+	server.tomcat.max-http-header-size=0 # Maximum size, in bytes, of the HTTP message header. Deprecated, use server.max-http-header-size instead.
 	server.tomcat.max-http-post-size=0 # Maximum size, in bytes, of the HTTP post content.
 	server.tomcat.max-swallow-size=2MB # Maximum amount of request body to swallow.
 	server.tomcat.max-threads=0 # Maximum number of worker threads.