Fix HTTP/2 over TLS with Jetty 10

Fixes gh-26988

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/SslServerCustomizer.java

@@ -106,24 +106,25 @@ class SslServerCustomizer implements JettyServerCustomizer {
 	private ServerConnector createHttp11ServerConnector(Server server, HttpConfiguration config,
 			SslContextFactory.Server sslContextFactory) {
 		HttpConnectionFactory connectionFactory = new HttpConnectionFactory(config);
-		SslConnectionFactory sslConnectionFactory;
+		return new SslValidatingServerConnector(server, sslContextFactory, this.ssl.getKeyAlias(),
+				createSslConnectionFactory(sslContextFactory, HttpVersion.HTTP_1_1.asString()), connectionFactory);
+	}
+
+	private SslConnectionFactory createSslConnectionFactory(SslContextFactory.Server sslContextFactory,
+			String protocol) {
 		try {
-			sslConnectionFactory = new SslConnectionFactory(sslContextFactory, HttpVersion.HTTP_1_1.asString());
+			return new SslConnectionFactory(sslContextFactory, protocol);
 		}
 		catch (NoSuchMethodError ex) {
 			// Jetty 10
 			try {
-				sslConnectionFactory = SslConnectionFactory.class
-						.getConstructor(SslContextFactory.Server.class, String.class)
-						.newInstance(sslContextFactory, HttpVersion.HTTP_1_1.asString());
+				return SslConnectionFactory.class.getConstructor(SslContextFactory.Server.class, String.class)
+						.newInstance(sslContextFactory, protocol);
 			}
 			catch (Exception ex2) {
 				throw new RuntimeException(ex2);
 			}
 		}
-
-		return new SslValidatingServerConnector(server, sslContextFactory, this.ssl.getKeyAlias(), sslConnectionFactory,
-				connectionFactory);
 	}
 
 	private boolean isJettyAlpnPresent() {
@@ -143,7 +144,7 @@ class SslServerCustomizer implements JettyServerCustomizer {
 		if (isConscryptPresent()) {
 			sslContextFactory.setProvider("Conscrypt");
 		}
-		SslConnectionFactory ssl = new SslConnectionFactory(sslContextFactory, alpn.getProtocol());
+		SslConnectionFactory ssl = createSslConnectionFactory(sslContextFactory, alpn.getProtocol());
 		return new SslValidatingServerConnector(server, sslContextFactory, this.ssl.getKeyAlias(), ssl, alpn, h2, http);
 	}
 

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jetty10/build.gradle

@@ -14,6 +14,24 @@ dependencies {
 	implementation(project(":spring-boot-project:spring-boot-starters:spring-boot-starter-web")) {
 		exclude module: "spring-boot-starter-tomcat"
 	}
+	
+	runtimeOnly("org.eclipse.jetty:jetty-alpn-java-server")
+	runtimeOnly("org.eclipse.jetty.http2:http2-server")
 
 	testImplementation(project(":spring-boot-project:spring-boot-starters:spring-boot-starter-test"))
+	testImplementation("org.eclipse.jetty:jetty-client")
+	testImplementation("org.eclipse.jetty.http2:http2-client")
+	testImplementation("org.eclipse.jetty.http2:http2-http-client-transport")
+}
+
+def buildingWithJava11OrLater() {
+	return project.hasProperty("toolchainVersion") || JavaVersion.current().java11Compatible
+}
+
+compileTestJava {
+	enabled = buildingWithJava11OrLater()
+}
+
+test {
+	enabled = buildingWithJava11OrLater()
 }

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jetty10/src/test/java/smoketest/jetty10/Jetty10Http2OverTlsTests.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2012-2021 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 smoketest.jetty10;
+
+import org.eclipse.jetty.client.HttpClient;
+import org.eclipse.jetty.client.api.ContentResponse;
+import org.eclipse.jetty.http2.client.HTTP2Client;
+import org.eclipse.jetty.http2.client.http.HttpClientTransportOverHTTP2;
+import org.eclipse.jetty.io.ClientConnector;
+import org.eclipse.jetty.util.ssl.SslContextFactory;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.EnabledForJreRange;
+import org.junit.jupiter.api.condition.JRE;
+
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.http.HttpStatus;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for HTTP/2 over TLS (h2) with Jetty 10.
+ *
+ * @author Andy Wilkinson
+ */
+@EnabledForJreRange(min = JRE.JAVA_11)
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT,
+		properties = { "server.http2.enabled=true", "server.ssl.enabled=true",
+				"server.ssl.keystore=classpath:sample.jks", "server.ssl.key-store-password=secret",
+				"server.ssl.key-password=password", "logging.level.org.eclipse.jetty=debug" })
+public class Jetty10Http2OverTlsTests {
+
+	@LocalServerPort
+	private int port;
+
+	@Test
+	void httpOverTlsGetWhenHttp2AndSslAreEnabledSucceeds() throws Exception {
+		SslContextFactory.Client sslContextFactory = new SslContextFactory.Client();
+		sslContextFactory.setTrustAll(true);
+		ClientConnector clientConnector = new ClientConnector();
+		clientConnector.setSslContextFactory(sslContextFactory);
+		HttpClient client = new HttpClient(new HttpClientTransportOverHTTP2(new HTTP2Client(clientConnector)));
+		client.start();
+		try {
+			ContentResponse response = client.GET("https://localhost:" + this.port + "/");
+			assertThat(response.getStatus()).isEqualTo(HttpStatus.OK.value());
+			assertThat(response.getContentAsString()).isEqualTo("Hello World");
+		}
+		finally {
+			client.stop();
+		}
+	}
+
+}