org.neo4j.bolt.transport.WebSocketFrameTranslator.java Source code

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Here is the source code for org.neo4j.bolt.transport.WebSocketFrameTranslator.java

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/*
 * Copyright (c) 2002-2016 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.bolt.transport;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame;

/**
 * Translates websocket frames to bytebufs, and bytebufs to frames. Intermediary layer between our binary protocol
 * and nettys built-in websocket handlers.
 */
public class WebSocketFrameTranslator extends ChannelDuplexHandler {
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        if (msg instanceof BinaryWebSocketFrame) {
            ctx.fireChannelRead(((BinaryWebSocketFrame) msg).content());
        } else {
            ctx.fireChannelRead(msg);
        }
    }

    @Override
    public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
        if (msg instanceof ByteBuf) {
            ctx.write(new BinaryWebSocketFrame((ByteBuf) msg), promise);
        } else {
            ctx.write(msg, promise);
        }
    }
}