io.netty.example.http2.helloworld.server.Http2OrHttpHandler Maven / Gradle / Ivy
/*
* 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:
*
* https://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.helloworld.server;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.ssl.ApplicationProtocolNames;
import io.netty.handler.ssl.ApplicationProtocolNegotiationHandler;
/**
* Negotiates with the browser if HTTP2 or HTTP is going to be used. Once decided, the Netty
* pipeline is setup with the correct handlers for the selected protocol.
*/
public class Http2OrHttpHandler extends ApplicationProtocolNegotiationHandler {
private static final int MAX_CONTENT_LENGTH = 1024 * 100;
protected Http2OrHttpHandler() {
super(ApplicationProtocolNames.HTTP_1_1);
}
@Override
protected void configurePipeline(ChannelHandlerContext ctx, String protocol) throws Exception {
if (ApplicationProtocolNames.HTTP_2.equals(protocol)) {
ctx.pipeline().addLast(new HelloWorldHttp2HandlerBuilder().build());
return;
}
if (ApplicationProtocolNames.HTTP_1_1.equals(protocol)) {
ctx.pipeline().addLast(new HttpServerCodec(),
new HttpObjectAggregator(MAX_CONTENT_LENGTH),
new HelloWorldHttp1Handler("ALPN Negotiation"));
return;
}
throw new IllegalStateException("unknown protocol: " + protocol);
}
}