com.shbxs.netty.SecureChatServerHandler.java Source code

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Here is the source code for com.shbxs.netty.SecureChatServerHandler.java

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/*
 * 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 com.shbxs.netty;

import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.group.ChannelGroup;
import io.netty.channel.group.DefaultChannelGroup;
import io.netty.handler.ssl.SslHandler;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GenericFutureListener;
import io.netty.util.concurrent.GlobalEventExecutor;

import java.net.InetAddress;

/**
 * Handles a server-side channel.
 */
public class SecureChatServerHandler extends SimpleChannelInboundHandler<String> {

    static final ChannelGroup channels = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);

    @Override
    public void channelActive(final ChannelHandlerContext ctx) {//?

        //       System.out.println("channelactive!");

        // 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).handshakeFuture()
                .addListener(new GenericFutureListener<Future<Channel>>() {
                    @Override
                    public void operationComplete(Future<Channel> future) throws Exception {
                        ctx.writeAndFlush("Welcome to " + InetAddress.getLocalHost().getHostName()
                                + " secure chat service!\n");
                        ctx.writeAndFlush("Your session is protected by "
                                + ctx.pipeline().get(SslHandler.class).engine().getSession().getCipherSuite()
                                + " cipher suite.\n");

                        channels.add(ctx.channel());
                    }
                });
    }

    @Override
    public void channelRead0(ChannelHandlerContext ctx, String msg) throws Exception {//???? 
        // Send the received message to all channels but the current one.
        boolean boo = false;
        //       System.out.println("channelread0!");
        String[] strArr = null;
        if (msg.startsWith("[")) {//?????
            boo = true;
            strArr = processMsg(msg);
        }
        for (Channel c : channels) { //????
            if (c != ctx.channel()) { //??
                if (boo == true) //
                    c.writeAndFlush(msg + '\n');
                else
                    c.writeAndFlush("[" + ctx.channel().remoteAddress() + "] " + msg + '\n');//
            } else { //??
                if (boo == true) { //
                    c.writeAndFlush("[] " + strArr[2] + '\n');
                } else { //
                    c.writeAndFlush(msg + '\n');
                }
            }
        }

        // Close the connection if the client has sent 'bye'.
        if ("bye".equals(msg.toLowerCase())) {
            ctx.close();
        }
    }

    public String[] processMsg(String msg) {
        String[] strArr = msg.split("\\[|\\]");//[?]??

        return strArr;
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        cause.printStackTrace();
        ctx.close();
    }
}