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/*
* Copyright 2000-2013 JetBrains s.r.o.
*
* 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.jetbrains.io;
import com.intellij.ide.XmlRpcServer;
import com.intellij.openapi.Disposable;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.util.Disposer;
import com.intellij.openapi.util.SystemInfo;
import com.intellij.util.net.NetUtils;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpMethod;
import io.netty.handler.codec.http.QueryStringDecoder;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.ide.CustomPortServerManager;
import org.jetbrains.ide.PooledThreadExecutor;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.util.Map;
public class BuiltInServer implements Disposable {
static final Logger LOG = Logger.getInstance(BuiltInServer.class);
private final ChannelRegistrar channelRegistrar = new ChannelRegistrar();
public boolean isRunning() {
return !channelRegistrar.isEmpty();
}
public void start(int port) {
start(1, port, 1, false);
}
public int start(int workerCount, int firstPort, int portsCount, boolean tryAnyPort) {
if (isRunning()) {
throw new IllegalStateException("server already started");
}
NioEventLoopGroup eventLoopGroup = new NioEventLoopGroup(workerCount, PooledThreadExecutor.INSTANCE);
ServerBootstrap bootstrap = createServerBootstrap(eventLoopGroup, channelRegistrar, null);
int port = bind(firstPort, portsCount, tryAnyPort, bootstrap);
bindCustomPorts(firstPort, port, eventLoopGroup);
return port;
}
static ServerBootstrap createServerBootstrap(@NotNull EventLoopGroup eventLoopGroup,
@NotNull final ChannelRegistrar channelRegistrar,
@Nullable Map<String, Object> xmlRpcHandlers) {
ServerBootstrap bootstrap = NettyUtil.nioServerBootstrap(eventLoopGroup);
if (xmlRpcHandlers == null) {
final PortUnificationServerHandler portUnificationServerHandler = new PortUnificationServerHandler();
bootstrap.childHandler(new ChannelInitializer() {
@Override
protected void initChannel(Channel channel) throws Exception {
channel.pipeline().addLast(channelRegistrar, portUnificationServerHandler, ChannelExceptionHandler.getInstance());
}
});
}
else {
final XmlRpcDelegatingHttpRequestHandler handler = new XmlRpcDelegatingHttpRequestHandler(xmlRpcHandlers);
bootstrap.childHandler(new ChannelInitializer() {
@Override
protected void initChannel(Channel channel) throws Exception {
channel.pipeline().addLast(channelRegistrar);
NettyUtil.addHttpServerCodec(channel.pipeline());
channel.pipeline().addLast(handler, ChannelExceptionHandler.getInstance());
}
});
}
return bootstrap;
}
private void bindCustomPorts(int firstPort, int port, NioEventLoopGroup eventLoopGroup) {
if (ApplicationManager.getApplication().isUnitTestMode()) {
return;
}
for (CustomPortServerManager customPortServerManager : CustomPortServerManager.EP_NAME.getExtensions()) {
try {
int customPortServerManagerPort = customPortServerManager.getPort();
SubServer subServer = new SubServer(customPortServerManager, eventLoopGroup);
Disposer.register(this, subServer);
if (customPortServerManager.isAvailableExternally() || (customPortServerManagerPort != firstPort && customPortServerManagerPort != port)) {
subServer.bind(customPortServerManagerPort);
}
}
catch (Throwable e) {
LOG.error(e);
}
}
}
private int bind(int firstPort, int portsCount, boolean tryAnyPort, ServerBootstrap bootstrap) {
InetAddress loopbackAddress = NetUtils.getLoopbackAddress();
for (int i = 0; i < portsCount; i++) {
int port = firstPort + i;
// we check if any port free too
if (!SystemInfo.isLinux && (!SystemInfo.isWindows || SystemInfo.isWinVistaOrNewer)) {
try {
ServerSocket serverSocket = new ServerSocket();
try {
serverSocket.bind(new InetSocketAddress(port), 1);
}
finally {
serverSocket.close();
}
}
catch (IOException ignored) {
continue;
}
}
ChannelFuture future = bootstrap.bind(loopbackAddress, port).awaitUninterruptibly();
if (future.isSuccess()) {
channelRegistrar.add(future.channel());
return port;
}
else if (!tryAnyPort && i == (portsCount - 1)) {
LOG.error(future.cause());
return -1;
}
}
LOG.info("We cannot bind to our default range, so, try to bind to any free port");
ChannelFuture future = bootstrap.bind(loopbackAddress, 0).awaitUninterruptibly();
if (future.isSuccess()) {
channelRegistrar.add(future.channel());
return ((InetSocketAddress)future.channel().localAddress()).getPort();
}
else {
LOG.error(future.cause());
return -1;
}
}
@Override
public void dispose() {
channelRegistrar.close();
LOG.info("web server stopped");
}
public static void replaceDefaultHandler(@NotNull ChannelHandlerContext context, @NotNull ChannelHandler channelHandler) {
context.pipeline().replace(DelegatingHttpRequestHandler.class, "replacedDefaultHandler", channelHandler);
}
@ChannelHandler.Sharable
private static final class XmlRpcDelegatingHttpRequestHandler extends DelegatingHttpRequestHandlerBase {
private final Map<String, Object> handlers;
public XmlRpcDelegatingHttpRequestHandler(Map<String, Object> handlers) {
this.handlers = handlers;
}
@Override
protected boolean process(ChannelHandlerContext context, FullHttpRequest request, QueryStringDecoder urlDecoder) throws IOException {
return (request.method() == HttpMethod.POST || request.method() == HttpMethod.OPTIONS) &&
XmlRpcServer.SERVICE.getInstance().process(urlDecoder.path(), request, context, handlers);
}
}
}
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