net.smert.frameworkgl.examples.networklinerepeater.LineRepeaterServerHandler.java Source code

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Here is the source code for net.smert.frameworkgl.examples.networklinerepeater.LineRepeaterServerHandler.java

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/**
 * Copyright 2014 Jason Sorensen (sorensenj@smert.net)
 *
 * 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 net.smert.frameworkgl.examples.networklinerepeater;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

/**
 *
 * @author Jason Sorensen <sorensenj@smert.net>
 */
@ChannelHandler.Sharable
public class LineRepeaterServerHandler extends ChannelInboundHandlerAdapter {

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) {
        ByteBuf buf = (ByteBuf) msg;
        int totalBytes = buf.readableBytes();
        if (totalBytes > 2) {
            byte last = buf.getByte(totalBytes - 1);
            byte nextToLast = buf.getByte(totalBytes - 2);
            if ((nextToLast == 13) && (last == 10)) {
                ctx.write(msg);
            }
        }
    }

    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) {
        ctx.flush();
    }

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

}