/*
* Copyright 2014 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.http2.server;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.codec.http.HttpServerUpgradeHandler;
import io.netty.handler.codec.http2.Http2ServerUpgradeCodec;
import io.netty.handler.ssl.SslContext;
import java.util.Collections;
/**
* Sets up the Netty pipeline for the example server. Depending on the endpoint config, sets up the
* pipeline for NPN or cleartext HTTP upgrade to HTTP/2.
*/
public class Http2ServerInitializer extends ChannelInitializer<SocketChannel> {
private final SslContext sslCtx;
public Http2ServerInitializer(SslContext sslCtx) {
this.sslCtx = sslCtx;
}
@Override
public void initChannel(SocketChannel ch) {
if (sslCtx != null) {
configureSsl(ch);
} else {
configureClearText(ch);
}
}
/**
* Configure the pipeline for TLS NPN negotiation to HTTP/2.
*/
private void configureSsl(SocketChannel ch) {
ch.pipeline().addLast(sslCtx.newHandler(ch.alloc()), new Http2OrHttpHandler());
}
/**
* Configure the pipeline for a cleartext upgrade from HTTP to HTTP/2.
*/
private static void configureClearText(SocketChannel ch) {
HttpServerCodec sourceCodec = new HttpServerCodec();
HttpServerUpgradeHandler.UpgradeCodec upgradeCodec =
new Http2ServerUpgradeCodec(new HelloWorldHttp2Handler());
HttpServerUpgradeHandler upgradeHandler =
new HttpServerUpgradeHandler(sourceCodec, Collections.singletonList(upgradeCodec), 65536);
ch.pipeline().addLast(sourceCodec);
ch.pipeline().addLast(upgradeHandler);
ch.pipeline().addLast(new UserEventLogger());
}
/**
* Class that logs any User Events triggered on this channel.
*/
private static class UserEventLogger extends ChannelHandlerAdapter {
@Override
public void userEventTriggered(ChannelHandlerContext ctx, Object evt) {
System.out.println("User Event Triggered: " + evt);
ctx.fireUserEventTriggered(evt);
}
}
}