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org.springframework.boot.context.embedded.undertow.UndertowEmbeddedServletContainer Maven / Gradle / Ivy
/*
* Copyright 2012-2015 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.undertow;
import java.lang.reflect.Field;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import io.undertow.Handlers;
import io.undertow.Undertow;
import io.undertow.Undertow.Builder;
import io.undertow.attribute.RequestHeaderAttribute;
import io.undertow.predicate.Predicate;
import io.undertow.predicate.Predicates;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.encoding.ContentEncodingRepository;
import io.undertow.server.handlers.encoding.EncodingHandler;
import io.undertow.server.handlers.encoding.GzipEncodingProvider;
import io.undertow.servlet.api.DeploymentManager;
import io.undertow.util.HttpString;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.xnio.channels.BoundChannel;
import org.springframework.boot.context.embedded.Compression;
import org.springframework.boot.context.embedded.EmbeddedServletContainer;
import org.springframework.boot.context.embedded.EmbeddedServletContainerException;
import org.springframework.http.HttpHeaders;
import org.springframework.util.MimeType;
import org.springframework.util.MimeTypeUtils;
import org.springframework.util.ReflectionUtils;
import org.springframework.util.StringUtils;
/**
* {@link EmbeddedServletContainer} that can be used to control an embedded Undertow
* server. Typically this class should be created using
* {@link UndertowEmbeddedServletContainerFactory} and not directly.
*
* @author Ivan Sopov
* @author Andy Wilkinson
* @since 1.2.0
* @see UndertowEmbeddedServletContainerFactory
*/
public class UndertowEmbeddedServletContainer implements EmbeddedServletContainer {
private static final Log logger = LogFactory
.getLog(UndertowEmbeddedServletContainer.class);
private final Builder builder;
private final DeploymentManager manager;
private final String contextPath;
private final boolean useForwardHeaders;
private final boolean autoStart;
private final Compression compression;
private Undertow undertow;
private boolean started = false;
public UndertowEmbeddedServletContainer(Builder builder, DeploymentManager manager,
String contextPath, int port, boolean autoStart, Compression compression) {
this(builder, manager, contextPath, port, false, autoStart, compression);
}
public UndertowEmbeddedServletContainer(Builder builder, DeploymentManager manager,
String contextPath, int port, boolean useForwardHeaders, boolean autoStart,
Compression compression) {
this.builder = builder;
this.manager = manager;
this.contextPath = contextPath;
this.useForwardHeaders = useForwardHeaders;
this.autoStart = autoStart;
this.compression = compression;
}
@Override
public synchronized void start() throws EmbeddedServletContainerException {
try {
if (!this.autoStart) {
return;
}
if (this.undertow == null) {
this.undertow = createUndertowServer();
}
this.undertow.start();
this.started = true;
UndertowEmbeddedServletContainer.logger
.info("Undertow started on port(s) " + getPortsDescription());
}
catch (ServletException ex) {
throw new EmbeddedServletContainerException(
"Unable to start embedded Undertow", ex);
}
}
private Undertow createUndertowServer() throws ServletException {
HttpHandler httpHandler = this.manager.start();
httpHandler = getContextHandler(httpHandler);
if (this.useForwardHeaders) {
httpHandler = Handlers.proxyPeerAddress(httpHandler);
}
this.builder.setHandler(httpHandler);
return this.builder.build();
}
private HttpHandler getContextHandler(HttpHandler httpHandler) {
HttpHandler contextHandler = configurationCompressionIfNecessary(httpHandler);
if (StringUtils.isEmpty(this.contextPath)) {
return contextHandler;
}
return Handlers.path().addPrefixPath(this.contextPath, contextHandler);
}
private HttpHandler configurationCompressionIfNecessary(HttpHandler httpHandler) {
if (this.compression == null || !this.compression.getEnabled()) {
return httpHandler;
}
ContentEncodingRepository repository = new ContentEncodingRepository();
repository.addEncodingHandler("gzip", new GzipEncodingProvider(), 50,
Predicates.and(getCompressionPredicates(this.compression)));
return new EncodingHandler(repository).setNext(httpHandler);
}
private Predicate[] getCompressionPredicates(Compression compression) {
List predicates = new ArrayList();
predicates.add(Predicates.maxContentSize(compression.getMinResponseSize()));
predicates.add(new CompressibleMimeTypePredicate(compression.getMimeTypes()));
if (compression.getExcludedUserAgents() != null) {
for (String agent : compression.getExcludedUserAgents()) {
RequestHeaderAttribute agentHeader = new RequestHeaderAttribute(
new HttpString(HttpHeaders.USER_AGENT));
predicates.add(Predicates.not(Predicates.regex(agentHeader, agent)));
}
}
return predicates.toArray(new Predicate[predicates.size()]);
}
private String getPortsDescription() {
List ports = getPorts();
if (!ports.isEmpty()) {
return StringUtils.collectionToDelimitedString(ports, " ");
}
return "unknown";
}
private List getPorts() {
List ports = new ArrayList();
try {
if (!this.autoStart) {
ports.add(new Port(-1, "unknown"));
}
else {
for (BoundChannel channel : extractChannels()) {
ports.add(getPortFromChannel(channel));
}
}
}
catch (Exception ex) {
// Continue
}
return ports;
}
@SuppressWarnings("unchecked")
private List extractChannels() {
Field channelsField = ReflectionUtils.findField(Undertow.class, "channels");
ReflectionUtils.makeAccessible(channelsField);
return (List) ReflectionUtils.getField(channelsField,
this.undertow);
}
private Port getPortFromChannel(BoundChannel channel) {
String protocol = ReflectionUtils.findField(channel.getClass(), "ssl") != null
? "https" : "http";
SocketAddress socketAddress = channel.getLocalAddress();
if (socketAddress instanceof InetSocketAddress) {
return new Port(((InetSocketAddress) socketAddress).getPort(), protocol);
}
return null;
}
@Override
public synchronized void stop() throws EmbeddedServletContainerException {
if (this.started) {
try {
this.started = false;
this.manager.stop();
this.undertow.stop();
}
catch (Exception ex) {
throw new EmbeddedServletContainerException("Unable to stop undertow",
ex);
}
}
}
@Override
public int getPort() {
List ports = getPorts();
if (ports.isEmpty()) {
return 0;
}
return ports.get(0).getNumber();
}
/**
* An active undertow port.
*/
private final static class Port {
private final int number;
private final String protocol;
private Port(int number, String protocol) {
this.number = number;
this.protocol = protocol;
}
public int getNumber() {
return this.number;
}
@Override
public String toString() {
return this.number + " (" + this.protocol + ")";
}
}
private static class CompressibleMimeTypePredicate implements Predicate {
private final List mimeTypes;
CompressibleMimeTypePredicate(String[] mimeTypes) {
this.mimeTypes = new ArrayList(mimeTypes.length);
for (String mimeTypeString : mimeTypes) {
this.mimeTypes.add(MimeTypeUtils.parseMimeType(mimeTypeString));
}
}
@Override
public boolean resolve(HttpServerExchange value) {
String contentType = value.getResponseHeaders()
.getFirst(HttpHeaders.CONTENT_TYPE);
if (contentType != null) {
for (MimeType mimeType : this.mimeTypes) {
if (mimeType
.isCompatibleWith(MimeTypeUtils.parseMimeType(contentType))) {
return true;
}
}
}
return false;
}
}
}
