spring JettyServletWebServerFactory 源码
springboot JettyServletWebServerFactory 代码
文件路径：/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/JettyServletWebServerFactory.java
/*
* Copyright 2012-2022 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 org.springframework.boot.web.embedded.jetty;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetSocketAddress;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.nio.channels.ReadableByteChannel;
import java.time.Duration;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.EventListener;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpServletResponseWrapper;
import org.eclipse.jetty.http.HttpCookie;
import org.eclipse.jetty.http.MimeTypes;
import org.eclipse.jetty.http2.server.HTTP2CServerConnectionFactory;
import org.eclipse.jetty.server.AbstractConnector;
import org.eclipse.jetty.server.ConnectionFactory;
import org.eclipse.jetty.server.Connector;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.HttpConfiguration;
import org.eclipse.jetty.server.HttpConnectionFactory;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.server.handler.ErrorHandler;
import org.eclipse.jetty.server.handler.HandlerWrapper;
import org.eclipse.jetty.server.handler.StatisticsHandler;
import org.eclipse.jetty.server.session.DefaultSessionCache;
import org.eclipse.jetty.server.session.FileSessionDataStore;
import org.eclipse.jetty.server.session.SessionHandler;
import org.eclipse.jetty.servlet.ErrorPageErrorHandler;
import org.eclipse.jetty.servlet.ListenerHolder;
import org.eclipse.jetty.servlet.ServletHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.eclipse.jetty.servlet.ServletMapping;
import org.eclipse.jetty.servlet.Source;
import org.eclipse.jetty.util.resource.JarResource;
import org.eclipse.jetty.util.resource.Resource;
import org.eclipse.jetty.util.resource.ResourceCollection;
import org.eclipse.jetty.util.thread.ThreadPool;
import org.eclipse.jetty.webapp.AbstractConfiguration;
import org.eclipse.jetty.webapp.Configuration;
import org.eclipse.jetty.webapp.WebAppContext;
import org.springframework.boot.web.server.Cookie.SameSite;
import org.springframework.boot.web.server.ErrorPage;
import org.springframework.boot.web.server.MimeMappings;
import org.springframework.boot.web.server.Shutdown;
import org.springframework.boot.web.server.WebServer;
import org.springframework.boot.web.servlet.ServletContextInitializer;
import org.springframework.boot.web.servlet.server.AbstractServletWebServerFactory;
import org.springframework.boot.web.servlet.server.CookieSameSiteSupplier;
import org.springframework.boot.web.servlet.server.ServletWebServerFactory;
import org.springframework.context.ResourceLoaderAware;
import org.springframework.core.io.ResourceLoader;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;
/**
* {@link ServletWebServerFactory} that can be used to create a {@link JettyWebServer}.
* Can be initialized using Spring's {@link ServletContextInitializer}s or Jetty
* {@link Configuration}s.
* <p>
* Unless explicitly configured otherwise this factory will create servers that listen for
* HTTP requests on port 8080.
*
* @author Phillip Webb
* @author Dave Syer
* @author Andrey Hihlovskiy
* @author Andy Wilkinson
* @author Eddú Meléndez
* @author Venil Noronha
* @author Henri Kerola
* @since 2.0.0
* @see #setPort(int)
* @see #setConfigurations(Collection)
* @see JettyWebServer
*/
public class JettyServletWebServerFactory extends AbstractServletWebServerFactory
implements ConfigurableJettyWebServerFactory, ResourceLoaderAware {
private List<Configuration> configurations = new ArrayList<>();
private boolean useForwardHeaders;
/**
* The number of acceptor threads to use.
*/
private int acceptors = -1;
/**
* The number of selector threads to use.
*/
private int selectors = -1;
private Set<JettyServerCustomizer> jettyServerCustomizers = new LinkedHashSet<>();
private ResourceLoader resourceLoader;
private ThreadPool threadPool;
/**
* Create a new {@link JettyServletWebServerFactory} instance.
*/
public JettyServletWebServerFactory() {
}
/**
* Create a new {@link JettyServletWebServerFactory} that listens for requests using
* the specified port.
* @param port the port to listen on
*/
public JettyServletWebServerFactory(int port) {
super(port);
}
/**
* Create a new {@link JettyServletWebServerFactory} with the specified context path
* and port.
* @param contextPath the root context path
* @param port the port to listen on
*/
public JettyServletWebServerFactory(String contextPath, int port) {
super(contextPath, port);
}
@Override
public WebServer getWebServer(ServletContextInitializer... initializers) {
JettyEmbeddedWebAppContext context = new JettyEmbeddedWebAppContext();
int port = Math.max(getPort(), 0);
InetSocketAddress address = new InetSocketAddress(getAddress(), port);
Server server = createServer(address);
configureWebAppContext(context, initializers);
server.setHandler(addHandlerWrappers(context));
this.logger.info("Server initialized with port: " + port);
if (getSsl() != null && getSsl().isEnabled()) {
customizeSsl(server, address);
}
for (JettyServerCustomizer customizer : getServerCustomizers()) {
customizer.customize(server);
}
if (this.useForwardHeaders) {
new ForwardHeadersCustomizer().customize(server);
}
if (getShutdown() == Shutdown.GRACEFUL) {
StatisticsHandler statisticsHandler = new StatisticsHandler();
statisticsHandler.setHandler(server.getHandler());
server.setHandler(statisticsHandler);
}
return getJettyWebServer(server);
}
private Server createServer(InetSocketAddress address) {
Server server = new Server(getThreadPool());
server.setConnectors(new Connector[] { createConnector(address, server) });
server.setStopTimeout(0);
return server;
}
private AbstractConnector createConnector(InetSocketAddress address, Server server) {
HttpConfiguration httpConfiguration = new HttpConfiguration();
httpConfiguration.setSendServerVersion(false);
List<ConnectionFactory> connectionFactories = new ArrayList<>();
connectionFactories.add(new HttpConnectionFactory(httpConfiguration));
if (getHttp2() != null && getHttp2().isEnabled()) {
connectionFactories.add(new HTTP2CServerConnectionFactory(httpConfiguration));
}
ServerConnector connector = new ServerConnector(server, this.acceptors, this.selectors,
connectionFactories.toArray(new ConnectionFactory[0]));
connector.setHost(address.getHostString());
connector.setPort(address.getPort());
return connector;
}
private Handler addHandlerWrappers(Handler handler) {
if (getCompression() != null && getCompression().getEnabled()) {
handler = applyWrapper(handler, JettyHandlerWrappers.createGzipHandlerWrapper(getCompression()));
}
if (StringUtils.hasText(getServerHeader())) {
handler = applyWrapper(handler, JettyHandlerWrappers.createServerHeaderHandlerWrapper(getServerHeader()));
}
if (!CollectionUtils.isEmpty(getCookieSameSiteSuppliers())) {
handler = applyWrapper(handler, new SuppliedSameSiteCookieHandlerWrapper(getCookieSameSiteSuppliers()));
}
return handler;
}
private Handler applyWrapper(Handler handler, HandlerWrapper wrapper) {
wrapper.setHandler(handler);
return wrapper;
}
private void customizeSsl(Server server, InetSocketAddress address) {
new SslServerCustomizer(address, getSsl(), getOrCreateSslStoreProvider(), getHttp2()).customize(server);
}
/**
* Configure the given Jetty {@link WebAppContext} for use.
* @param context the context to configure
* @param initializers the set of initializers to apply
*/
protected final void configureWebAppContext(WebAppContext context, ServletContextInitializer... initializers) {
Assert.notNull(context, "Context must not be null");
context.clearAliasChecks();
context.setTempDirectory(getTempDirectory());
if (this.resourceLoader != null) {
context.setClassLoader(this.resourceLoader.getClassLoader());
}
String contextPath = getContextPath();
context.setContextPath(StringUtils.hasLength(contextPath) ? contextPath : "/");
context.setDisplayName(getDisplayName());
configureDocumentRoot(context);
if (isRegisterDefaultServlet()) {
addDefaultServlet(context);
}
if (shouldRegisterJspServlet()) {
addJspServlet(context);
context.addBean(new JasperInitializer(context), true);
}
addLocaleMappings(context);
ServletContextInitializer[] initializersToUse = mergeInitializers(initializers);
Configuration[] configurations = getWebAppContextConfigurations(context, initializersToUse);
context.setConfigurations(configurations);
context.setThrowUnavailableOnStartupException(true);
configureSession(context);
postProcessWebAppContext(context);
}
private void configureSession(WebAppContext context) {
SessionHandler handler = context.getSessionHandler();
SameSite sessionSameSite = getSession().getCookie().getSameSite();
if (sessionSameSite != null) {
handler.setSameSite(HttpCookie.SameSite.valueOf(sessionSameSite.name()));
}
Duration sessionTimeout = getSession().getTimeout();
handler.setMaxInactiveInterval(isNegative(sessionTimeout) ? -1 : (int) sessionTimeout.getSeconds());
if (getSession().isPersistent()) {
DefaultSessionCache cache = new DefaultSessionCache(handler);
FileSessionDataStore store = new FileSessionDataStore();
store.setStoreDir(getValidSessionStoreDir());
cache.setSessionDataStore(store);
handler.setSessionCache(cache);
}
}
private boolean isNegative(Duration sessionTimeout) {
return sessionTimeout == null || sessionTimeout.isNegative();
}
private void addLocaleMappings(WebAppContext context) {
getLocaleCharsetMappings()
.forEach((locale, charset) -> context.addLocaleEncoding(locale.toString(), charset.toString()));
}
private File getTempDirectory() {
String temp = System.getProperty("java.io.tmpdir");
return (temp != null) ? new File(temp) : null;
}
private void configureDocumentRoot(WebAppContext handler) {
File root = getValidDocumentRoot();
File docBase = (root != null) ? root : createTempDir("jetty-docbase");
try {
List<Resource> resources = new ArrayList<>();
Resource rootResource = (docBase.isDirectory() ? Resource.newResource(docBase.getCanonicalFile())
: JarResource.newJarResource(Resource.newResource(docBase)));
resources.add((root != null) ? new LoaderHidingResource(rootResource) : rootResource);
for (URL resourceJarUrl : getUrlsOfJarsWithMetaInfResources()) {
Resource resource = createResource(resourceJarUrl);
if (resource.exists() && resource.isDirectory()) {
resources.add(resource);
}
}
handler.setBaseResource(new ResourceCollection(resources.toArray(new Resource[0])));
}
catch (Exception ex) {
throw new IllegalStateException(ex);
}
}
private Resource createResource(URL url) throws Exception {
if ("file".equals(url.getProtocol())) {
File file = new File(url.toURI());
if (file.isFile()) {
return Resource.newResource("jar:" + url + "!/META-INF/resources");
}
}
return Resource.newResource(url + "META-INF/resources");
}
/**
* Add Jetty's {@code DefaultServlet} to the given {@link WebAppContext}.
* @param context the jetty {@link WebAppContext}
*/
protected final void addDefaultServlet(WebAppContext context) {
Assert.notNull(context, "Context must not be null");
ServletHolder holder = new ServletHolder();
holder.setName("default");
holder.setClassName("org.eclipse.jetty.servlet.DefaultServlet");
holder.setInitParameter("dirAllowed", "false");
holder.setInitOrder(1);
context.getServletHandler().addServletWithMapping(holder, "/");
ServletMapping servletMapping = context.getServletHandler().getServletMapping("/");
servletMapping.setFromDefaultDescriptor(true);
}
/**
* Add Jetty's {@code JspServlet} to the given {@link WebAppContext}.
* @param context the jetty {@link WebAppContext}
*/
protected final void addJspServlet(WebAppContext context) {
Assert.notNull(context, "Context must not be null");
ServletHolder holder = new ServletHolder();
holder.setName("jsp");
holder.setClassName(getJsp().getClassName());
holder.setInitParameter("fork", "false");
holder.setInitParameters(getJsp().getInitParameters());
holder.setInitOrder(3);
context.getServletHandler().addServlet(holder);
ServletMapping mapping = new ServletMapping();
mapping.setServletName("jsp");
mapping.setPathSpecs(new String[] { "*.jsp", "*.jspx" });
context.getServletHandler().addServletMapping(mapping);
}
/**
* Return the Jetty {@link Configuration}s that should be applied to the server.
* @param webAppContext the Jetty {@link WebAppContext}
* @param initializers the {@link ServletContextInitializer}s to apply
* @return configurations to apply
*/
protected Configuration[] getWebAppContextConfigurations(WebAppContext webAppContext,
ServletContextInitializer... initializers) {
List<Configuration> configurations = new ArrayList<>();
configurations.add(getServletContextInitializerConfiguration(webAppContext, initializers));
configurations.add(getErrorPageConfiguration());
configurations.add(getMimeTypeConfiguration());
configurations.add(new WebListenersConfiguration(getWebListenerClassNames()));
configurations.addAll(getConfigurations());
return configurations.toArray(new Configuration[0]);
}
/**
* Create a configuration object that adds error handlers.
* @return a configuration object for adding error pages
*/
private Configuration getErrorPageConfiguration() {
return new AbstractConfiguration() {
@Override
public void configure(WebAppContext context) throws Exception {
JettyEmbeddedErrorHandler errorHandler = new JettyEmbeddedErrorHandler();
context.setErrorHandler(errorHandler);
addJettyErrorPages(errorHandler, getErrorPages());
}
};
}
/**
* Create a configuration object that adds mime type mappings.
* @return a configuration object for adding mime type mappings
*/
private Configuration getMimeTypeConfiguration() {
return new AbstractConfiguration() {
@Override
public void configure(WebAppContext context) throws Exception {
MimeTypes mimeTypes = context.getMimeTypes();
for (MimeMappings.Mapping mapping : getMimeMappings()) {
mimeTypes.addMimeMapping(mapping.getExtension(), mapping.getMimeType());
}
}
};
}
/**
* Return a Jetty {@link Configuration} that will invoke the specified
* {@link ServletContextInitializer}s. By default this method will return a
* {@link ServletContextInitializerConfiguration}.
* @param webAppContext the Jetty {@link WebAppContext}
* @param initializers the {@link ServletContextInitializer}s to apply
* @return the {@link Configuration} instance
*/
protected Configuration getServletContextInitializerConfiguration(WebAppContext webAppContext,
ServletContextInitializer... initializers) {
return new ServletContextInitializerConfiguration(initializers);
}
/**
* Post process the Jetty {@link WebAppContext} before it's used with the Jetty
* Server. Subclasses can override this method to apply additional processing to the
* {@link WebAppContext}.
* @param webAppContext the Jetty {@link WebAppContext}
*/
protected void postProcessWebAppContext(WebAppContext webAppContext) {
}
/**
* Factory method called to create the {@link JettyWebServer}. Subclasses can override
* this method to return a different {@link JettyWebServer} or apply additional
* processing to the Jetty server.
* @param server the Jetty server.
* @return a new {@link JettyWebServer} instance
*/
protected JettyWebServer getJettyWebServer(Server server) {
return new JettyWebServer(server, getPort() >= 0);
}
@Override
public void setResourceLoader(ResourceLoader resourceLoader) {
this.resourceLoader = resourceLoader;
}
@Override
public void setUseForwardHeaders(boolean useForwardHeaders) {
this.useForwardHeaders = useForwardHeaders;
}
@Override
public void setAcceptors(int acceptors) {
this.acceptors = acceptors;
}
@Override
public void setSelectors(int selectors) {
this.selectors = selectors;
}
/**
* Sets {@link JettyServerCustomizer}s that will be applied to the {@link Server}
* before it is started. Calling this method will replace any existing customizers.
* @param customizers the Jetty customizers to apply
*/
public void setServerCustomizers(Collection<? extends JettyServerCustomizer> customizers) {
Assert.notNull(customizers, "Customizers must not be null");
this.jettyServerCustomizers = new LinkedHashSet<>(customizers);
}
/**
* Returns a mutable collection of Jetty {@link JettyServerCustomizer}s that will be
* applied to the {@link Server} before it is created.
* @return the {@link JettyServerCustomizer}s
*/
public Collection<JettyServerCustomizer> getServerCustomizers() {
return this.jettyServerCustomizers;
}
@Override
public void addServerCustomizers(JettyServerCustomizer... customizers) {
Assert.notNull(customizers, "Customizers must not be null");
this.jettyServerCustomizers.addAll(Arrays.asList(customizers));
}
/**
* Sets Jetty {@link Configuration}s that will be applied to the {@link WebAppContext}
* before the server is created. Calling this method will replace any existing
* configurations.
* @param configurations the Jetty configurations to apply
*/
public void setConfigurations(Collection<? extends Configuration> configurations) {
Assert.notNull(configurations, "Configurations must not be null");
this.configurations = new ArrayList<>(configurations);
}
/**
* Returns a mutable collection of Jetty {@link Configuration}s that will be applied
* to the {@link WebAppContext} before the server is created.
* @return the Jetty {@link Configuration}s
*/
public Collection<Configuration> getConfigurations() {
return this.configurations;
}
/**
* Add {@link Configuration}s that will be applied to the {@link WebAppContext} before
* the server is started.
* @param configurations the configurations to add
*/
public void addConfigurations(Configuration... configurations) {
Assert.notNull(configurations, "Configurations must not be null");
this.configurations.addAll(Arrays.asList(configurations));
}
/**
* Returns a Jetty {@link ThreadPool} that should be used by the {@link Server}.
* @return a Jetty {@link ThreadPool} or {@code null}
*/
public ThreadPool getThreadPool() {
return this.threadPool;
}
@Override
public void setThreadPool(ThreadPool threadPool) {
this.threadPool = threadPool;
}
private void addJettyErrorPages(ErrorHandler errorHandler, Collection<ErrorPage> errorPages) {
if (errorHandler instanceof ErrorPageErrorHandler handler) {
for (ErrorPage errorPage : errorPages) {
if (errorPage.isGlobal()) {
handler.addErrorPage(ErrorPageErrorHandler.GLOBAL_ERROR_PAGE, errorPage.getPath());
}
else {
if (errorPage.getExceptionName() != null) {
handler.addErrorPage(errorPage.getExceptionName(), errorPage.getPath());
}
else {
handler.addErrorPage(errorPage.getStatusCode(), errorPage.getPath());
}
}
}
}
}
private static final class LoaderHidingResource extends Resource {
private final Resource delegate;
private LoaderHidingResource(Resource delegate) {
this.delegate = delegate;
}
@Override
public Resource addPath(String path) throws IOException {
if (path.startsWith("/org/springframework/boot")) {
return null;
}
return this.delegate.addPath(path);
}
@Override
public boolean isContainedIn(Resource resource) throws MalformedURLException {
return this.delegate.isContainedIn(resource);
}
@Override
public void close() {
this.delegate.close();
}
@Override
public boolean exists() {
return this.delegate.exists();
}
@Override
public boolean isDirectory() {
return this.delegate.isDirectory();
}
@Override
public long lastModified() {
return this.delegate.lastModified();
}
@Override
public long length() {
return this.delegate.length();
}
@Override
public URI getURI() {
return this.delegate.getURI();
}
@Override
public File getFile() throws IOException {
return this.delegate.getFile();
}
@Override
public String getName() {
return this.delegate.getName();
}
@Override
public InputStream getInputStream() throws IOException {
return this.delegate.getInputStream();
}
@Override
public ReadableByteChannel getReadableByteChannel() throws IOException {
return this.delegate.getReadableByteChannel();
}
@Override
public boolean delete() throws SecurityException {
return this.delegate.delete();
}
@Override
public boolean renameTo(Resource dest) throws SecurityException {
return this.delegate.renameTo(dest);
}
@Override
public String[] list() {
return this.delegate.list();
}
}
/**
* {@link AbstractConfiguration} to apply {@code @WebListener} classes.
*/
private static class WebListenersConfiguration extends AbstractConfiguration {
private final Set<String> classNames;
WebListenersConfiguration(Set<String> webListenerClassNames) {
this.classNames = webListenerClassNames;
}
@Override
public void configure(WebAppContext context) throws Exception {
ServletHandler servletHandler = context.getServletHandler();
for (String className : this.classNames) {
configure(context, servletHandler, className);
}
}
private void configure(WebAppContext context, ServletHandler servletHandler, String className)
throws ClassNotFoundException {
ListenerHolder holder = servletHandler.newListenerHolder(new Source(Source.Origin.ANNOTATION, className));
holder.setHeldClass(loadClass(context, className));
servletHandler.addListener(holder);
}
@SuppressWarnings("unchecked")
private Class<? extends EventListener> loadClass(WebAppContext context, String className)
throws ClassNotFoundException {
ClassLoader classLoader = context.getClassLoader();
classLoader = (classLoader != null) ? classLoader : getClass().getClassLoader();
return (Class<? extends EventListener>) classLoader.loadClass(className);
}
}
/**
* {@link HandlerWrapper} to apply {@link CookieSameSiteSupplier supplied}
* {@link SameSite} cookie values.
*/
private static class SuppliedSameSiteCookieHandlerWrapper extends HandlerWrapper {
private final List<CookieSameSiteSupplier> suppliers;
SuppliedSameSiteCookieHandlerWrapper(List<CookieSameSiteSupplier> suppliers) {
this.suppliers = suppliers;
}
@Override
public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
HttpServletResponse wrappedResponse = new ResponseWrapper(response);
super.handle(target, baseRequest, request, wrappedResponse);
}
class ResponseWrapper extends HttpServletResponseWrapper {
ResponseWrapper(HttpServletResponse response) {
super(response);
}
@Override
public void addCookie(Cookie cookie) {
SameSite sameSite = getSameSite(cookie);
if (sameSite != null) {
String comment = HttpCookie.getCommentWithoutAttributes(cookie.getComment());
String sameSiteComment = getSameSiteComment(sameSite);
cookie.setComment((comment != null) ? comment + sameSiteComment : sameSiteComment);
}
super.addCookie(cookie);
}
private String getSameSiteComment(SameSite sameSite) {
return switch (sameSite) {
case NONE -> HttpCookie.SAME_SITE_NONE_COMMENT;
case LAX -> HttpCookie.SAME_SITE_LAX_COMMENT;
case STRICT -> HttpCookie.SAME_SITE_STRICT_COMMENT;
};
}
private SameSite getSameSite(Cookie cookie) {
for (CookieSameSiteSupplier supplier : SuppliedSameSiteCookieHandlerWrapper.this.suppliers) {
SameSite sameSite = supplier.getSameSite(cookie);
if (sameSite != null) {
return sameSite;
}
}
return null;
}
}
}
}
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