/*
 * Copyright 2022 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.file;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.Channel;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http2.Http2SecurityUtil;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.handler.ssl.ApplicationProtocolConfig;
import io.netty.handler.ssl.ApplicationProtocolNames;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.SslContextBuilder;
import io.netty.handler.ssl.SslProvider;
import io.netty.handler.ssl.SupportedCipherSuiteFilter;
import io.netty.handler.ssl.util.SelfSignedCertificate;

public final class Http2StaticFileServer {

    private static final int PORT = Integer.parseInt(System.getProperty("port", "8443"));

    public static void main(String[] args) throws Exception {
        SelfSignedCertificate ssc = new SelfSignedCertificate();
        SslContext sslCtx = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey())
                .sslProvider(SslProvider.JDK)
                .ciphers(Http2SecurityUtil.CIPHERS, SupportedCipherSuiteFilter.INSTANCE)
                .applicationProtocolConfig(new ApplicationProtocolConfig(
                        ApplicationProtocolConfig.Protocol.ALPN,
                        // NO_ADVERTISE is currently the only mode supported by both OpenSsl and JDK providers.
                        ApplicationProtocolConfig.SelectorFailureBehavior.NO_ADVERTISE,
                        // ACCEPT is currently the only mode supported by both OpenSsl and JDK providers.
                        ApplicationProtocolConfig.SelectedListenerFailureBehavior.ACCEPT,
                        ApplicationProtocolNames.HTTP_2,
                        ApplicationProtocolNames.HTTP_1_1))
                .build();

        EventLoopGroup bossGroup = new NioEventLoopGroup(2);
        EventLoopGroup workerGroup = new NioEventLoopGroup(4);
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .handler(new LoggingHandler(LogLevel.INFO))
                    .childHandler(new Http2StaticFileServerInitializer(sslCtx));

            Channel ch = b.bind(PORT).sync().channel();

            System.out.println("Open your web browser and navigate to https://127.0.0.1:" + PORT + '/');

            ch.closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }
}
