Support JSPs in Embedded Jetty

JSPs are now supported in executable WARs with embedded Jetty.

Fixes gh-367
Closes gh-5290

spring-boot-dependencies/pom.xml

@@ -1546,6 +1546,27 @@
 				<artifactId>jetty-io</artifactId>
 				<version>${jetty.version}</version>
 			</dependency>
+			<dependency>
+				<groupId>org.eclipse.jetty</groupId>
+				<artifactId>jetty-jsp</artifactId>
+				<version>${jetty.version}</version>
+				<exclusions>
+					<exclusion>
+						<groupId>org.eclipse.jetty.orbit</groupId>
+						<artifactId>javax.servlet</artifactId>
+					</exclusion>
+				</exclusions>
+			</dependency>
+			<dependency>
+				<groupId>org.eclipse.jetty</groupId>
+				<artifactId>apache-jstl</artifactId>
+				<version>${jetty.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>org.eclipse.jetty</groupId>
+				<artifactId>apache-jsp</artifactId>
+				<version>${jetty.version}</version>
+			</dependency>
 			<dependency>
 				<groupId>org.eclipse.jetty</groupId>
 				<artifactId>jetty-jmx</artifactId>

spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -2128,7 +2128,8 @@ packaged as an executable archive), there are some limitations in the JSP suppor
   and will also be deployable to a standard container (not limited to, but including
   Tomcat). An executable jar will not work because of a hard coded file pattern in Tomcat.
 
-* Jetty does not currently work as an embedded container with JSPs.
+* With Jetty it should work if you use war packaging, i.e. an executable war will work,
+  and will also be deployable to any standard container.
 
 * Undertow does not support JSPs.
 

spring-boot-samples/README.adoc

@@ -111,6 +111,9 @@ The following sample applications are provided:
 | link:spring-boot-sample-jetty-ssl[spring-boot-sample-jetty-ssl]
 | Embedded Jetty configured to use SSL
 
+| link:spring-boot-sample-jetty-jsp[spring-boot-sample-jetty-jsp]
+| Web application that uses JSP templates with Jetty
+
 | link:spring-boot-sample-jetty8[spring-boot-sample-jetty8]
 | Embedded Jetty 8
 

spring-boot-samples/pom.xml

@@ -55,6 +55,7 @@
 		<module>spring-boot-sample-jersey</module>
 		<module>spring-boot-sample-jersey1</module>
 		<module>spring-boot-sample-jetty</module>
+		<module>spring-boot-sample-jetty-jsp</module>
 		<module>spring-boot-sample-jetty-ssl</module>
 		<module>spring-boot-sample-jetty8</module>
 		<module>spring-boot-sample-jetty8-ssl</module>

spring-boot-samples/spring-boot-sample-jetty-jsp/pom.xml

@@ -0,0 +1,83 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<!-- Your own application should inherit from spring-boot-starter-parent -->
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-samples</artifactId>
+		<version>1.4.0.BUILD-SNAPSHOT</version>
+	</parent>
+	<artifactId>spring-boot-sample-jetty-jsp</artifactId>
+	<packaging>war</packaging>
+	<name>Spring Boot Jetty JSP Sample</name>
+	<description>Spring Boot Jetty JSP Sample</description>
+	<url>http://projects.spring.io/spring-boot/</url>
+	<organization>
+		<name>Pivotal Software, Inc.</name>
+		<url>http://www.spring.io</url>
+	</organization>
+	<properties>
+		<main.basedir>${basedir}/../..</main.basedir>
+		<m2eclipse.wtp.contextRoot>/</m2eclipse.wtp.contextRoot>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+			<exclusions>
+				<exclusion>
+					<groupId>org.springframework.boot</groupId>
+					<artifactId>spring-boot-starter-tomcat</artifactId>
+				</exclusion>
+			</exclusions>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-validation</artifactId>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.tomcat.embed</groupId>
+					<artifactId>tomcat-embed-el</artifactId>
+				</exclusion>
+			</exclusions>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-jetty</artifactId>
+			<scope>provided</scope>
+		</dependency>
+		<dependency>
+			<groupId>javax.servlet</groupId>
+			<artifactId>jstl</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.eclipse.jetty</groupId>
+			<artifactId>apache-jsp</artifactId>
+			<scope>provided</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<executable>true</executable>
+				</configuration>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-surefire-plugin</artifactId>
+				<configuration>
+					<useSystemClassLoader>false</useSystemClassLoader>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+</project>

spring-boot-samples/spring-boot-sample-jetty-jsp/src/main/java/sample/jetty/jsp/MyException.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2012-2016 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
+ *
+ *      http://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 sample.jetty.jsp;
+
+public class MyException extends RuntimeException {
+
+	public MyException(String message) {
+		super(message);
+	}
+
+}

spring-boot-samples/spring-boot-sample-jetty-jsp/src/main/java/sample/jetty/jsp/MyRestResponse.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2012-2016 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
+ *
+ *      http://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 sample.jetty.jsp;
+
+public class MyRestResponse {
+
+	private String message;
+
+	public MyRestResponse(String message) {
+		this.message = message;
+	}
+
+	public String getMessage() {
+		return this.message;
+	}
+
+}

spring-boot-samples/spring-boot-sample-jetty-jsp/src/main/java/sample/jetty/jsp/SampleJettyJspApplication.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2012-2016 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
+ *
+ *      http://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 sample.jetty.jsp;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.boot.context.web.SpringBootServletInitializer;
+
+@SpringBootApplication
+public class SampleJettyJspApplication extends SpringBootServletInitializer {
+
+	@Override
+	protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
+		return application.sources(SampleJettyJspApplication.class);
+	}
+
+	public static void main(String[] args) throws Exception {
+		SpringApplication.run(SampleJettyJspApplication.class, args);
+	}
+
+}

spring-boot-samples/spring-boot-sample-jetty-jsp/src/main/java/sample/jetty/jsp/WelcomeController.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2012-2016 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
+ *
+ *      http://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 sample.jetty.jsp;
+
+import java.util.Date;
+import java.util.Map;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@Controller
+public class WelcomeController {
+
+	@Value("${application.message:Hello World}")
+	private String message = "Hello World";
+
+	@RequestMapping("/")
+	public String welcome(Map<String, Object> model) {
+		model.put("time", new Date());
+		model.put("message", this.message);
+		return "welcome";
+	}
+
+	@RequestMapping("/fail")
+	public String fail() {
+		throw new MyException("Oh dear!");
+	}
+
+	@RequestMapping("/fail2")
+	public String fail2() {
+		throw new IllegalStateException();
+	}
+
+	@ExceptionHandler(MyException.class)
+	@ResponseStatus(HttpStatus.BAD_REQUEST)
+	public @ResponseBody MyRestResponse handleMyRuntimeException(MyException exception) {
+		return new MyRestResponse("Some data I want to send back to the client.");
+	}
+
+}

spring-boot-samples/spring-boot-sample-jetty-jsp/src/main/resources/application.properties

@@ -0,0 +1,3 @@
+spring.mvc.view.prefix: /WEB-INF/jsp/
+spring.mvc.view.suffix: .jsp
+application.message: Hello Spring Boot

spring-boot-samples/spring-boot-sample-jetty-jsp/src/main/webapp/WEB-INF/jsp/welcome.jsp

@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+
+<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
+
+<html lang="en">
+
+<body>
+	<c:url value="/resources/text.txt" var="url"/>
+	<spring:url value="/resources/text.txt" htmlEscape="true" var="springUrl" />
+	Spring URL: ${springUrl} at ${time}
+	<br>
+	JSTL URL: ${url}
+	<br>
+	Message: ${message}
+</body>
+
+</html>

spring-boot-samples/spring-boot-sample-jetty-jsp/src/test/java/sample/jetty/jsp/SampleWebJspApplicationTests.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2012-2016 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
+ *
+ *      http://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 sample.jetty.jsp;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.boot.context.embedded.LocalServerPort;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Basic integration tests for JSP application.
+ *
+ * @author Phillip Webb
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
+@DirtiesContext
+public class SampleWebJspApplicationTests {
+
+	@LocalServerPort
+	private int port;
+
+	@Test
+	public void testJspWithEl() throws Exception {
+		ResponseEntity<String> entity = new TestRestTemplate()
+				.getForEntity("http://localhost:" + this.port, String.class);
+		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(entity.getBody()).contains("/resources/text.txt");
+	}
+
+}

spring-boot/src/main/java/org/springframework/boot/context/embedded/jetty/JasperInitializer.java

@@ -0,0 +1,165 @@
+/*
+ * Copyright 2012-2016 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
+ *
+ *      http://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 org.springframework.boot.context.embedded.jetty;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.net.URLConnection;
+import java.net.URLStreamHandler;
+import java.net.URLStreamHandlerFactory;
+
+import javax.servlet.ServletContainerInitializer;
+
+import org.eclipse.jetty.util.component.AbstractLifeCycle;
+import org.eclipse.jetty.webapp.WebAppContext;
+
+import org.springframework.util.ClassUtils;
+
+/**
+ * Jetty {@link AbstractLifeCycle} to initialize jasper.
+ *
+ * @author Vladimir Tsanev
+ */
+public class JasperInitializer extends AbstractLifeCycle {
+
+	private final WebAppContext context;
+	private final ServletContainerInitializer initializer;
+
+	JasperInitializer(WebAppContext context) {
+		this.context = context;
+		this.initializer = newInitializer();
+	}
+
+	private static ServletContainerInitializer newInitializer() {
+		try {
+			try {
+				return (ServletContainerInitializer) ClassUtils
+						.forName("org.eclipse.jetty.apache.jsp.JettyJasperInitializer",
+								null)
+						.newInstance();
+			}
+			catch (Exception ex) {
+				// try the original initializer
+				return (ServletContainerInitializer) ClassUtils
+						.forName("org.apache.jasper.servlet.JasperInitializer", null)
+						.newInstance();
+			}
+		}
+		catch (Exception ex) {
+			return null;
+		}
+	}
+
+	@Override
+	protected void doStart() throws Exception {
+		if (this.initializer == null) {
+			return;
+		}
+		try {
+			URL.setURLStreamHandlerFactory(new URLStreamHandlerFactory() {
+				@Override
+				public URLStreamHandler createURLStreamHandler(String protocol) {
+					if ("war".equals(protocol)) {
+						return new WarUrlStreamHandler();
+					}
+					return null;
+				}
+			});
+		}
+		catch (Error ex) {
+			// Ignore
+		}
+		ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+		Thread.currentThread().setContextClassLoader(this.context.getClassLoader());
+		try {
+			try {
+				setExtendedListenerTypes(true);
+				this.initializer.onStartup(null, this.context.getServletContext());
+			}
+			finally {
+				setExtendedListenerTypes(false);
+			}
+		}
+		finally {
+			Thread.currentThread().setContextClassLoader(classLoader);
+		}
+	}
+
+	private void setExtendedListenerTypes(boolean extended) {
+		try {
+			this.context.getServletContext().setExtendedListenerTypes(extended);
+		}
+		catch (NoSuchMethodError ex) {
+			// Not available on Jetty 8
+		}
+	}
+
+	/**
+	 * {@link URLStreamHandler} for {@literal war} protocol compatible with jasper's
+	 * {@link URL urls} produced by
+	 * {@link org.apache.tomcat.util.scan.JarFactory#getJarEntryURL(URL, String)}.
+	 */
+	static class WarUrlStreamHandler extends URLStreamHandler {
+
+		@Override
+		protected void parseURL(URL u, String spec, int start, int limit) {
+			String path = "jar:" + spec.substring("war:".length());
+
+			int separator = path.indexOf("*/");
+			if (separator >= 0) {
+				path = path.substring(0, separator) + "!/"
+						+ path.substring(separator + 2);
+			}
+
+			setURL(u, u.getProtocol(), "", -1, null, null, path, null, null);
+		}
+
+		@Override
+		protected URLConnection openConnection(URL u) throws IOException {
+			return new WarURLConnection(u);
+		}
+	}
+
+	/**
+	 * {@link URLConnection} to support {@literal war} protocol.
+	 */
+	static class WarURLConnection extends URLConnection {
+
+		private final URLConnection connection;
+
+		protected WarURLConnection(URL url) throws IOException {
+			super(url);
+			this.connection = new URL(url.getFile()).openConnection();
+		}
+
+		@Override
+		public void connect() throws IOException {
+			if (!this.connected) {
+				this.connection.connect();
+				this.connected = true;
+			}
+		}
+
+		@Override
+		public InputStream getInputStream() throws IOException {
+			connect();
+			return this.connection.getInputStream();
+		}
+	}
+
+}

spring-boot/src/main/java/org/springframework/boot/context/embedded/jetty/JettyEmbeddedServletContainerFactory.java

@@ -352,6 +352,7 @@ public class JettyEmbeddedServletContainerFactory
 		}
 		if (shouldRegisterJspServlet()) {
 			addJspServlet(context);
+			context.addBean(new JasperInitializer(context), true);
 		}
 		ServletContextInitializer[] initializersToUse = mergeInitializers(initializers);
 		Configuration[] configurations = getWebAppContextConfigurations(context,