/*
* Copyright 2012 The Netty Project
*
* The Netty Project licenses this file to you 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 io.netty.example.securechat;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import io.netty.channel.group.ChannelGroup;
import io.netty.channel.group.DefaultChannelGroup;
import io.netty.handler.ssl.SslHandler;
import java.net.InetAddress;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Handles a server-side channel.
*/
public class SecureChatServerHandler extends ChannelInboundMessageHandlerAdapter<String> {
private static final Logger logger = Logger.getLogger(
SecureChatServerHandler.class.getName());
static final ChannelGroup channels = new DefaultChannelGroup();
@Override
public void channelActive(final ChannelHandlerContext ctx) throws Exception {
// Once session is secured, send a greeting and register the channel to the global channel
// list so the channel received the messages from others.
ctx.pipeline().get(SslHandler.class).handshake().addListener(new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
ctx.write(
"Welcome to " + InetAddress.getLocalHost().getHostName() +
" secure chat service!\n");
ctx.write(
"Your session is protected by " +
ctx.pipeline().get(SslHandler.class).engine().getSession().getCipherSuite() +
" cipher suite.\n");
channels.add(ctx.channel());
}
});
}
@Override
public void messageReceived(ChannelHandlerContext ctx, String request) throws Exception {
// Send the received message to all channels but the current one.
for (Channel c: channels) {
if (c != ctx.channel()) {
c.write("[" + ctx.channel().remoteAddress() + "] " +
request + '\n');
} else {
c.write("[you] " + request + '\n');
}
}
// Close the connection if the client has sent 'bye'.
if ("bye".equals(request.toLowerCase())) {
ctx.close();
}
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
logger.log(
Level.WARNING,
"Unexpected exception from downstream.", cause);
ctx.close();
}
}