Attempt to stabilise web server tests that use h2c

Apache HttpClient 5.1 doesn't cope with Jetty 10 sending
SETTINGS_ENABLE_CONNECT_PROTOCOL in the settings frame. It also appears
to be unstable when using Undertow, resulting in a failure and
"UT005032: Listener not making progress on framed channel, closing
channel to prevent infinite loop" being logged on the server-side.

Local experimentation suggests that Jetty's HTTP/2 client is more
robust and that it does not trigger the problem with Undertow. It also
fixes the problem with SETTINGS_ENABLE_CONNECT_PROTOCOL when testing
against Jetty 10 so this commit updates the tests to use Jetty's client.

Closes gh-26040

spring-boot-project/spring-boot/build.gradle

@@ -98,8 +98,10 @@ dependencies {
 	testImplementation("mysql:mysql-connector-java")
 	testImplementation("net.sourceforge.jtds:jtds")
 	testImplementation("org.apache.derby:derby")
-	testImplementation("org.apache.httpcomponents:httpasyncclient")
 	testImplementation("org.awaitility:awaitility")
+	testImplementation("org.eclipse.jetty:jetty-client")
+	testImplementation("org.eclipse.jetty.http2:http2-client")
+	testImplementation("org.eclipse.jetty.http2:http2-http-client-transport")
 	testImplementation("org.firebirdsql.jdbc:jaybird-jdk18")
 	testImplementation("org.hsqldb:hsqldb")
 	testImplementation("org.junit.jupiter:junit-jupiter")

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/embedded/jetty/Jetty10ReactiveWebServerFactoryTests.java

@@ -43,11 +43,4 @@ class Jetty10ReactiveWebServerFactoryTests extends JettyReactiveWebServerFactory
 
 	}
 
-	@Test
-	@Override
-	@Disabled("https://github.com/eclipse/jetty.project/issues/6164")
-	protected void whenHttp2IsEnabledAndSslIsDisabledThenH2cCanBeUsed() {
-
-	}
-
 }

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/embedded/jetty/Jetty10ServletWebServerFactoryTests.java

@@ -50,11 +50,4 @@ public class Jetty10ServletWebServerFactoryTests extends JettyServletWebServerFa
 	protected void jettyConfigurations() throws Exception {
 	}
 
-	@Test
-	@Override
-	@Disabled("https://github.com/eclipse/jetty.project/issues/6164")
-	protected void whenHttp2IsEnabledAndSslIsDisabledThenH2cCanBeUsed() {
-
-	}
-
 }

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/embedded/jetty/TestWithJetty10.java

@@ -35,11 +35,12 @@ import org.springframework.boot.testsupport.classpath.ClassPathOverrides;
 @Target(ElementType.TYPE)
 @Retention(RetentionPolicy.RUNTIME)
 @EnabledForJreRange(min = JRE.JAVA_11)
-@ClassPathExclusions({ "jetty-*.jar", "tomcat-embed*.jar" })
-@ClassPathOverrides({ "org.slf4j:slf4j-api:1.7.25", "org.eclipse.jetty:jetty-io:10.0.2",
-		"org.eclipse.jetty:jetty-server:10.0.2", "org.eclipse.jetty:jetty-servlet:10.0.2",
-		"org.eclipse.jetty:jetty-util:10.0.2", "org.eclipse.jetty:jetty-webapp:10.0.2",
-		"org.eclipse.jetty.http2:http2-common:10.0.2", "org.eclipse.jetty.http2:http2-hpack:10.0.2",
+@ClassPathExclusions({ "jetty-*.jar", "tomcat-embed*.jar", "http2-*.jar" })
+@ClassPathOverrides({ "org.slf4j:slf4j-api:1.7.25", "org.eclipse.jetty:jetty-client:10.0.2",
+		"org.eclipse.jetty:jetty-io:10.0.2", "org.eclipse.jetty:jetty-server:10.0.2",
+		"org.eclipse.jetty:jetty-servlet:10.0.2", "org.eclipse.jetty:jetty-util:10.0.2",
+		"org.eclipse.jetty:jetty-webapp:10.0.2", "org.eclipse.jetty.http2:http2-common:10.0.2",
+		"org.eclipse.jetty.http2:http2-hpack:10.0.2", "org.eclipse.jetty.http2:http2-http-client-transport:10.0.2",
 		"org.eclipse.jetty.http2:http2-server:10.0.2", "org.mortbay.jasper:apache-jsp:8.5.40" })
 @interface TestWithJetty10 {
 

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/reactive/server/AbstractReactiveWebServerFactoryTests.java

@@ -41,15 +41,12 @@ import io.netty.handler.codec.http.HttpHeaderNames;
 import io.netty.handler.codec.http.HttpResponse;
 import io.netty.handler.ssl.SslProvider;
 import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
-import org.apache.hc.client5.http.async.methods.SimpleHttpRequest;
-import org.apache.hc.client5.http.async.methods.SimpleHttpRequests;
-import org.apache.hc.client5.http.async.methods.SimpleHttpResponse;
-import org.apache.hc.client5.http.impl.async.CloseableHttpAsyncClient;
-import org.apache.hc.client5.http.impl.async.HttpAsyncClients;
-import org.apache.hc.core5.concurrent.FutureCallback;
-import org.apache.hc.core5.http.ContentType;
 import org.assertj.core.api.ThrowableAssert.ThrowingCallable;
 import org.awaitility.Awaitility;
+import org.eclipse.jetty.client.api.ContentResponse;
+import org.eclipse.jetty.client.util.StringContentProvider;
+import org.eclipse.jetty.http2.client.HTTP2Client;
+import org.eclipse.jetty.http2.client.http.HttpClientTransportOverHTTP2;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 import reactor.core.publisher.Mono;
@@ -459,35 +456,24 @@ public abstract class AbstractReactiveWebServerFactoryTests {
 	}
 
 	@Test
-	protected void whenHttp2IsEnabledAndSslIsDisabledThenH2cCanBeUsed()
-			throws InterruptedException, ExecutionException, IOException {
+	protected void whenHttp2IsEnabledAndSslIsDisabledThenH2cCanBeUsed() throws Exception {
 		AbstractReactiveWebServerFactory factory = getFactory();
 		Http2 http2 = new Http2();
 		http2.setEnabled(true);
 		factory.setHttp2(http2);
 		this.webServer = factory.getWebServer(new EchoHandler());
 		this.webServer.start();
-		try (CloseableHttpAsyncClient http2Client = HttpAsyncClients.createHttp2Default()) {
-			http2Client.start();
-			SimpleHttpRequest request = SimpleHttpRequests.post("http://localhost:" + this.webServer.getPort());
-			request.setBody("Hello World", ContentType.TEXT_PLAIN);
-			SimpleHttpResponse response = http2Client.execute(request, new FutureCallback<SimpleHttpResponse>() {
-
-				@Override
-				public void failed(Exception ex) {
-				}
-
-				@Override
-				public void completed(SimpleHttpResponse result) {
-				}
-
-				@Override
-				public void cancelled() {
+		org.eclipse.jetty.client.HttpClient client = new org.eclipse.jetty.client.HttpClient(
+				new HttpClientTransportOverHTTP2(new HTTP2Client()));
+		client.start();
+		try {
+			ContentResponse response = client.POST("http://localhost:" + this.webServer.getPort())
+					.content(new StringContentProvider("Hello World"), "text/plain").send();
+			assertThat(response.getStatus() == HttpStatus.OK.value());
+			assertThat(response.getContentAsString()).isEqualTo("Hello World");
 		}
-
-			}).get();
-			assertThat(response.getCode() == HttpStatus.OK.value());
-			assertThat(response.getBodyText()).isEqualTo("Hello World");
+		finally {
+			client.stop();
 		}
 	}
 

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/server/AbstractServletWebServerFactoryTests.java

@@ -79,12 +79,6 @@ import javax.servlet.http.HttpServletResponse;
 import javax.servlet.http.HttpSession;
 
 import org.apache.catalina.webresources.TomcatURLStreamHandlerFactory;
-import org.apache.hc.client5.http.async.methods.SimpleHttpRequest;
-import org.apache.hc.client5.http.async.methods.SimpleHttpRequests;
-import org.apache.hc.client5.http.async.methods.SimpleHttpResponse;
-import org.apache.hc.client5.http.impl.async.CloseableHttpAsyncClient;
-import org.apache.hc.client5.http.impl.async.HttpAsyncClients;
-import org.apache.hc.core5.concurrent.FutureCallback;
 import org.apache.http.HttpResponse;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.entity.InputStreamFactory;
@@ -103,6 +97,9 @@ import org.apache.jasper.EmbeddedServletOptions;
 import org.apache.jasper.servlet.JspServlet;
 import org.assertj.core.api.ThrowableAssert.ThrowingCallable;
 import org.awaitility.Awaitility;
+import org.eclipse.jetty.client.api.ContentResponse;
+import org.eclipse.jetty.http2.client.HTTP2Client;
+import org.eclipse.jetty.http2.client.http.HttpClientTransportOverHTTP2;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Assumptions;
 import org.junit.jupiter.api.Test;
@@ -1130,35 +1127,22 @@ public abstract class AbstractServletWebServerFactoryTests {
 	}
 
 	@Test
-	protected void whenHttp2IsEnabledAndSslIsDisabledThenH2cCanBeUsed()
-			throws InterruptedException, ExecutionException, IOException {
+	protected void whenHttp2IsEnabledAndSslIsDisabledThenH2cCanBeUsed() throws Exception {
 		AbstractServletWebServerFactory factory = getFactory();
 		Http2 http2 = new Http2();
 		http2.setEnabled(true);
 		factory.setHttp2(http2);
 		this.webServer = factory.getWebServer(exampleServletRegistration());
 		this.webServer.start();
-		try (CloseableHttpAsyncClient http2Client = HttpAsyncClients.createHttp2Default()) {
-			http2Client.start();
-			SimpleHttpRequest request = SimpleHttpRequests
-					.get("http://localhost:" + this.webServer.getPort() + "/hello");
-			SimpleHttpResponse response = http2Client.execute(request, new FutureCallback<SimpleHttpResponse>() {
-
-				@Override
-				public void failed(Exception ex) {
-				}
-
-				@Override
-				public void completed(SimpleHttpResponse result) {
-				}
-
-				@Override
-				public void cancelled() {
+		org.eclipse.jetty.client.HttpClient client = new org.eclipse.jetty.client.HttpClient(
+				new HttpClientTransportOverHTTP2(new HTTP2Client()));
+		client.start();
+		try {
+			ContentResponse response = client.GET("http://localhost:" + this.webServer.getPort() + "/hello");
+			assertThat(response.getStatus() == HttpStatus.OK.value());
 		}
-
-			}).get();
-			assertThat(response.getCode()).isEqualTo(HttpStatus.OK.value());
-			assertThat(response.getBodyText()).isEqualTo("Hello World");
+		finally {
+			client.stop();
 		}
 	}