/*
    * ====================================================================
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.hc.core5.http.examples;
  
  import java.net.InetAddress;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  
  import javax.net.ssl.SSLPeerUnverifiedException;
  import javax.net.ssl.SSLSession;
  
  import org.apache.hc.core5.concurrent.FutureCallback;
  import org.apache.hc.core5.http.HttpConnection;
  import org.apache.hc.core5.http.HttpHost;
  import org.apache.hc.core5.http.HttpRequest;
  import org.apache.hc.core5.http.HttpResponse;
  import org.apache.hc.core5.http.Message;
  import org.apache.hc.core5.http.impl.Http1StreamListener;
  import org.apache.hc.core5.http.impl.bootstrap.AsyncRequesterBootstrap;
  import org.apache.hc.core5.http.impl.bootstrap.HttpAsyncRequester;
  import org.apache.hc.core5.http.message.RequestLine;
  import org.apache.hc.core5.http.message.StatusLine;
  import org.apache.hc.core5.http.nio.entity.StringAsyncEntityConsumer;
  import org.apache.hc.core5.http.nio.support.BasicRequestProducer;
  import org.apache.hc.core5.http.nio.support.BasicResponseConsumer;
  import org.apache.hc.core5.http.protocol.HttpCoreContext;
  import org.apache.hc.core5.http.support.BasicRequestBuilder;
  import org.apache.hc.core5.io.CloseMode;
  import org.apache.hc.core5.reactor.IOReactorConfig;
  import org.apache.hc.core5.util.Timeout;
  
  /**
   * Example of SNI (Server Name Identification) usage with async I/O.
   */
  public class AsyncClientSNIExample {
  
      public static void main(final String[] args) throws Exception {
  
          final IOReactorConfig ioReactorConfig = IOReactorConfig.custom()
                  .setSoTimeout(5, TimeUnit.SECONDS)
                  .build();
  
          // Create and start requester
          final HttpAsyncRequester requester = AsyncRequesterBootstrap.bootstrap()
                  .setIOReactorConfig(ioReactorConfig)
                  .setStreamListener(new Http1StreamListener() {
  
                      @Override
                      public void onRequestHead(final HttpConnection connection, final HttpRequest request) {
                          System.out.println(connection.getRemoteAddress() + " " + new RequestLine(request));
                      }
  
                      @Override
                      public void onResponseHead(final HttpConnection connection, final HttpResponse response) {
                          System.out.println(connection.getRemoteAddress() + " " + new StatusLine(response));
                      }
  
                      @Override
                      public void onExchangeComplete(final HttpConnection connection, final boolean keepAlive) {
                          if (keepAlive) {
                              System.out.println(connection.getRemoteAddress() + " exchange completed (connection kept alive)");
                          } else {
                              System.out.println(connection.getRemoteAddress() + " exchange completed (connection closed)");
                          }
                      }
  
                  })
                  .create();
  
          Runtime.getRuntime().addShutdownHook(new Thread(() -> {
              System.out.println("HTTP requester shutting down");
              requester.close(CloseMode.GRACEFUL);
          }));
          requester.start();
  
         // Physical endpoint (google.com)
         final InetAddress targetAddress = InetAddress.getByName("www.google.com");
         // Target host (google.ch)
         final HttpHost target = new HttpHost("https", targetAddress, "www.google.ch", 443);
         final HttpCoreContext coreContext = HttpCoreContext.create();
 
         final CountDownLatch latch = new CountDownLatch(1);
         final HttpRequest request = BasicRequestBuilder.get()
                 .setPath("/")
                 .build();
         requester.execute(
                 target,
                 new BasicRequestProducer(request, null),
                 new BasicResponseConsumer<>(new StringAsyncEntityConsumer()),
                 null,
                 Timeout.ofSeconds(5),
                 coreContext,
                 new FutureCallback<Message<HttpResponse, String>>() {
 
                     @Override
                     public void completed(final Message<HttpResponse, String> message) {
                         final HttpResponse response = message.getHead();
                         System.out.println(request.getRequestUri() + "->" + response.getCode());
                         final SSLSession sslSession = coreContext.getSSLSession();
                         if (sslSession != null) {
                             try {
                                 System.out.println("Peer: " + sslSession.getPeerPrincipal());
                                 System.out.println("TLS protocol: " + sslSession.getProtocol());
                                 System.out.println("TLS cipher suite: " + sslSession.getCipherSuite());
                             } catch (final SSLPeerUnverifiedException ignore) {
                             }
                         }
                         latch.countDown();
                     }
 
                     @Override
                     public void failed(final Exception ex) {
                         System.out.println(request.getRequestUri() + "->" + ex);
                         latch.countDown();
                     }
 
                     @Override
                     public void cancelled() {
                         System.out.println(request.getRequestUri() + " cancelled");
                         latch.countDown();
                     }
 
                 });
 
         latch.await();
         System.out.println("Shutting down I/O reactor");
         requester.initiateShutdown();
     }
 
 }