/**
 * Copyright 2018 Netflix, Inc.
 *
 * 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 com.netflix.zuul.netty.server.push;

import com.netflix.netty.common.channel.config.ChannelConfig;
import com.netflix.zuul.netty.server.BaseZuulChannelInitializer;
import io.netty.channel.Channel;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.group.ChannelGroup;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
import io.netty.handler.codec.http.websocketx.extensions.compression.WebSocketServerCompressionHandler;

/**
 * Author: Susheel Aroskar
 * Date: 5/15/18
 */
public abstract class PushChannelInitializer extends BaseZuulChannelInitializer {


    public PushChannelInitializer(int port, ChannelConfig channelConfig, ChannelConfig channelDependencies,
                                  ChannelGroup channels) {

        super(port, channelConfig, channelDependencies, channels);
    }

    @Override
    protected void addHttp1Handlers(ChannelPipeline pipeline) {
        pipeline.addLast(HTTP_CODEC_HANDLER_NAME, new HttpServerCodec(
                MAX_INITIAL_LINE_LENGTH.get(),
                MAX_HEADER_SIZE.get(),
                MAX_CHUNK_SIZE.get(),
                false
        ));
        pipeline.addLast(new HttpObjectAggregator(8192));
    }


    @Override
    protected void initChannel(Channel ch) throws Exception {
        final ChannelPipeline pipeline = ch.pipeline();
        storeChannel(ch);
        addTcpRelatedHandlers(pipeline);
        addHttp1Handlers(pipeline);
        addPushHandlers(pipeline);
    }


    protected abstract void addPushHandlers(final ChannelPipeline pipeline);

}

/**
 * Copyright 2018 Netflix, Inc.
 *
 * 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 com.netflix.zuul.netty.server.push;

import com.netflix.netty.common.HttpRequestReadTimeoutHandler;
import com.netflix.netty.common.HttpServerLifecycleChannelHandler;
import com.netflix.netty.common.accesslog.AccessLogChannelHandler;
import com.netflix.netty.common.channel.config.ChannelConfig;
import com.netflix.netty.common.metrics.HttpBodySizeRecordingChannelHandler;
import com.netflix.zuul.netty.insights.PassportStateHttpServerHandler;
import com.netflix.zuul.netty.server.BaseZuulChannelInitializer;
import io.netty.channel.Channel;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.group.ChannelGroup;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
import io.netty.handler.codec.http.websocketx.extensions.compression.WebSocketServerCompressionHandler;

import java.util.concurrent.TimeUnit;

/**
 * Author: Susheel Aroskar
 * Date: 5/15/18
 */
public abstract class PushChannelInitializer extends BaseZuulChannelInitializer {


    public PushChannelInitializer(int port, ChannelConfig channelConfig, ChannelConfig channelDependencies,
                                  ChannelGroup channels) {

        super(port, channelConfig, channelDependencies, channels);
    }

    @Override
    protected void addHttp1Handlers(ChannelPipeline pipeline) {
        pipeline.addLast(HTTP_CODEC_HANDLER_NAME, new HttpServerCodec(
                MAX_INITIAL_LINE_LENGTH.get(),
                MAX_HEADER_SIZE.get(),
                MAX_CHUNK_SIZE.get(),
                false
        ));
        pipeline.addLast(new HttpObjectAggregator(8192));
    }


    @Override
    protected void addHttpRelatedHandlers(ChannelPipeline pipeline) {
        pipeline.addLast(new AccessLogChannelHandler(accessLogPublisher));
        pipeline.addLast(stripInboundProxyHeadersHandler);
    }

    @Override
    protected void initChannel(Channel ch) throws Exception {
        final ChannelPipeline pipeline = ch.pipeline();
        storeChannel(ch);
        addTcpRelatedHandlers(pipeline);
        addHttp1Handlers(pipeline);
        addHttpRelatedHandlers(pipeline);
        addPushHandlers(pipeline);
    }


    protected abstract void addPushHandlers(final ChannelPipeline pipeline);

}

Add access log and client IP detection to push server